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heating duff co duff offers a complete line of custom and replacement tube bundles and coils for all your replacement and new work needs tapered tube plugs for repairing heat exchangers boilers 1/4 through 1 1/4 readily available sold in packs of 24 emergency deliveries available with build times as fast as we sell solutions b&g armstrong taco amtrol trane carrier mcquay and many more 48 hours we can field measure just give us a call 610-275-4453 page 269 for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices.

duff co duff water heaters commercial or residential gas or electric heating for your gas or electric water heater requirements contact your duff representative phone 610-275-4453 fax 610-279-6299 page 270 for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices.

heating gas water heaters residential gas 6 year warranty energy saver 10 yr warranty available duff co propane available 1 non-cfc foam insulation vitraglas lining factory installed dielectric waterway fittings protective magnesium anode rod factory installed hydrojet total performance system fully automatic control t&p relief valve opening on side of tank gal capacity 30 30 40 40 50 65 75 100 btu input 32,000 30,000 40,000 40,000 40,000 65,000 75,000 88,000 gph rec 90of rise 33 31 41 41 41 68 76 90 style tall short tall short standard standard standard tall floor to flue conn 59 1/4 48 1/4 ...

duff co heating electric water heaters residential electric water heater 6 year warranty energy saver 1 non-cfc foam insulation vitraglas lining factory installed dielectric waterway fittings with heat traps protective magnesium anode rod factory installed hydrojet total performance system direct heat transfer jacket dia height approx with immersed screw-type fig no gal ship elements t&p relief valve cap wt opening on top of tank 8493 8496 8500 8503 8505 30 40 50 65 80 16 18 20 20 22 46 1/2 46 3/4 46 1/4 58 3/4 58 3/4 80 96 119 146 174 low boy electric water heater can be used undercounter ...

heating electric water heaters duff co wall hung electric utility water heater 1.5 kw 7 gph recovery 1 non-cfc foam insulation surrounds the tank surface factory installed heavy duty wall mounting bracket factory installed dielectric waterway fittings fully automatic controls direct heat transfer with immersed screw-type elements vitraglas lining protective magnesium anode rod t&p relief valve opening on side of tank fig no 61282 61283 61284 61285 gallon capacity 6 12 19 30 height 15 3/4 16 3/8 24 3/8 29 1/4 diameter 14 18 18 20 wall to front 14 5/8 18 5/8 18 5/8 20 5/8 approx ship ...

duff co heating commercial water heaters commercial gas water heater vitraglass lined tank automatic flue damper reduces standby loss spark ignition eliminates constant pilot dual anode rod for extra long life 3 year limited warranty r value 16 nsf available on several models of water heaters fig no nat lp input btu 199,999 199,999 1st hour del gal at 100o f rise 250 263 stg cap us gal 80 98 height diameter vent diameter 6 6 water conn 1 1/2 1 1/2 weight price 50071 50072 64 1/2 75 1/2 28 1/4 28 1/4 540 610 commercial water heater energy saver vitraglas lined tank dual anodic protection against ...

heating commercial water heaters oil fired commercial water heater 6 year warranty duff co oil heats water 3 to 4 times faster than other fuels resulting in high recovery rates factory installed dielectric waterway fittings factory installed hydroject total performance system protective anode rod easy-space saving installation 1 non-cfc foam insulation fig no tank storage capacity gallons 32 50 recommended firing rate gph no 2 oil .65 .75 recovery at recommended firing rate gph 91 107 price 61298 61299 combicor gas fired energy saver water heater direct fired combination water heater and boiler ...

duff co compact heating boosters imperial sanitizing installations page 276 for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices.

duff heating commercial water heater sizing checklist restaurant checklist 1 number of meals served daily 2 required water temperature in f 3 brand and model number of dishwashers 4 length of dishwashing cycle 1 hour 2 hours 3 hours gpm of dishwashers gph of dishwasher2 5 number of vegetable sinks 6 prescraper yes no open-type other 7 preflusher yes no hand-operated closed-type recirculating 8 pot sinks yes no single pot double pot triple pot 9 number of bar sinks 10 number of washrooms laundry checklist model number clothes washers 1a b c d e number of clothes washers gallons of fill ...

duff co water heater dip tube fig no 8719 price water heater accessories lower thermostat ul listed 1 yr warranty energy efficient range setting built in safety switch to prevent overheating adjustable temperature range 110o-170o fig no 8712 price heating elements water heater drip pans polyethylene fig no price 73938 8721 aluminum fig no price 51156 51157 universal flange replaces flat or round head elements kit contains 1 element 2 gaskets 4 bolt immersion element 2 1/2 diagonal bolt hole center descr 1500w 120v 2000w 120v 1500w 240v 2000w 240v 2500w 240v 4500w 240v 6000w 240v 4500w 480v fig ...

duff heating aruba cast iron gas fired hot water boiler co standard equipment includes standing pilot and vent damper completely factory assembled pre-wired and crated with built-in draft diverter deluxe baked enamel steel jacket 3/4 boiler drain asme relief valve 30 lb 1 1/4 circulator wired and piped to boiler one piece cast iron burners natural gas only vent damper honeywell l8148e combination high control and circulator relay honeywell automatic redundant combination gas valve 24v with pilot filter switches one spill switch and one rollout switch model fig no no of specs natural gas and ...

duff co heating cxe gas fired cast iron hot water boiler high efficiency standard equipment includes completely factory assembled pre-wired and crated 3 x4 increaser fitting and sealant to adapt 3 fan outlet to 4 vent pipe honeywell l8148a honeywell at140c flame rollout safety vacuum switch for proven air flow combination pressure/temperature gauge 1 1/4 circulator isolation flanges asme relief valve 30 lb complete installed and wired gas control system with burner and manifold model no of specs natural gas and lp gas aga input btu/hr doe heating capacity btu/hr 36,000 63,000 94,000 125,000 ...

heating duff co nassau cast iron oil fired steam boiler standard equipment with coil includes completely factory assembled pre-wired and crted flue collector deluxe baked enamel steel jacket oil burner with cad cell oil solenoid valves r8184g primary control mounted tankless heater glass gauge with trimmings asme 3/4 pop safety valve silicone sealant boiler drain draft regulator pa-404a pressure trol l-4006a aquastat steam gauge low water cutoff #67 float type standard equipment less coil includes same as above except cover plate for tankless heater no tankless heater no l4006a aquastat model ...

oil fired 84 to 150,000 btu call for pricing and availability page 282 for ...

mills cast iron boiler parts call for pricing and availability 610-275-4453 call for ...

duff co heating gas-fired infra-red garage/shop heater indo or in stall ation only fig no 39220 39224 39226 39228 39230 39236 39239 39241 39244 39249 39353 39256 39258 39264 39269 description enerco 4040ndsp5 enerco 4040npp enerco 40400la5 enerco 4040lpp enerco 8060ndsp5 enerco 8060npp enerco 8060la5 enerco 8060lpp enerco 9100sndsp5 enerco 9100snpp enerco 9100sla5 enerco 9100slpp enerco 9120ndsp5 enerco 9120npp enerco 9120lpp gas n n lp lp n n lp lp n n lp lp n n lp btu/hr 40 thousand 40 thousand 40 thousand 40 thousand 60 thousand 60 thousand 60 thousand 60 thousand 100 thousand 100 thousand ...

heating steam/hot water unit heaters duff co modine steam heater faster installation rugged construction finished grey-green raked enamel with rust protection finish description fig no btu per hour price also available in gas fired call for more information ventless gas space heater horizontal horizontal horizontal horizontal horizontal horizontal horizontal horizontal horizontal horizontal horizontal horizontal horizontal vertical 41510 41511 41512 41513 41514 41515 41516 41517 41518 41519 41520 41521 41522 41532 18,000 24,000 33,000 47,000 63,000 86,000 108,000 121,000 165,000 193,000 258,000 ...

duff co heating cast iron baseboard center leg fig no 15198 price cast iron hi baseboard 9 7/8 high 3.4 sq ft lin ft sold per foot longest continuous length 6 call us now with your requirements fig no 15192 price per foot holding lug fig no 15197 price also available push nipple 15199 tie bolt nut 15201 assembly tool 41967 fin left hand valve enclosure 5 fig no price right hand valve enclosure 5 fig no price 4 4/8 inside corner fig no price tube baseboard 15194 15193 15195 embassy fin tube baseboard heat 3/4 copper fin tube 8 lengths only how to order complete package includes assembled ...

call for sizing info call duff for pricing and availability the runtal omnipanel ... also available uf2 uf3 call now for pricing and availability 2 uf4 runtal euro ...

are shown below detailed advise and pricing for most types of construction are ...

heating fig no honeywell controls description duff co price 10263 t87f2873 the round 40-90 of 10256 t87f1859 includes 6 wall plate 44792 t87f3467 easy-to-see enlarged scale and raised designations 10257 9710 9945 9721 t87f2782 head only 35-65of scale q539a1014 heating cooling subbase q539a1147 or independent cool circuits q539c1020 cooling only 10250 t822d1024 rectangular heating 50586 t834c1137 rectangular heating cooling clock thermostat 10234 t8090a1007 low voltage set back thermostat 48427 t8600a1000 microelectronic set back heat only 39058 t8600c1014 microelectronic set back heat cool ...

duff co fanrelay heating honeywell s fan relay for 24 volt circuit control of line voltage fan motors and auxiliary circuits in heating cooling and heat/cool systems has 1 normally open contact one normallyclosed contact built-in spud for junction box mounting electrical rating n.0 contacts 14 amps 120v 8 amps 240v n.c contacts 14 amps 120v 7 amps 240v fig no 10059 mfg no r8225a1017 coil voltage 24 switching action spdt price fan centers used for low voltage control of line voltage fan motors in heating and cooling equipment enclosed relay with 38 va transformer mounts on 4x4 electrical ...

heating duff co makes a fast simple job of wiring multiple 3 or 4 wire 24 volt zone valves solid state controls includes transformer internal isolated end switch and terminal board wiring for thermostats and zone valves operates honeywell taco and most other popular zone valves fig no mfg no of transformer price zones taco and argo hydronic controls zone valve controllers switching relays 49329 azv-243 44644 azv-245 fig no 72754 72747 82487 72748 75957 of zones 1 zone with priority with priority with priority with priority max output transformer at 24 vac voltage 7.2 amps 15 amps 15 amps 20 amps ...

available in stainless steel call for pricing and availability page 292 for ...

heating oil burner protector relay provides automatic nonrecycling control of intermittent ignition oil burner systems used in conjunction with fig no s 9486 or 1058 and a 24v thermostat to switch line voltage to burner motor and ignition transformer external push button reset after safety shutdown includes solid state flame sensing circuit and 24v transformer to power heating control circuit mounts on standard 4x4 junction box electrical ratings 45 second models 7.4 amps 120v 15 30 second models 10.0 amps 120 v fig no 10041 10042 10044 safety timing thermostat circuit r8184g4009 45 seconds ...

duff co universal temperature control goldline single stage electronic temperature control designed to be a direct replacement for outdated and unreliable electromechanical controls provides on/off temperature control with single-pole double-throw relay output controlling temperature is the most important part of any hvac/r system and it provides tight temperature control of 1of from the setpoint temperature this cotnrol can be mounted up to 1000 from the sensor which allows the installer to position the control in a more accessible and secure area take the error out of temperature controlling ...

heating vr8304 duff co honeywell gas valves vr8305 dual valve combination gas control for electronic hot surface hsi and direct spark dsi ignition systems used with s89c -e -f and s87 ignition modules replaces honeywell vr8450 8405 white-roodgers 36e36 -38 36c68 robertshaw 7200der same valve action and features as vr8304 but without pilot control mfg no vr8305m3506 size ipt inletxoutlet 1/2x3/4 btuh capacity range 30,000 to 415,000 gas natural vr8300 compact dual valve combinaiton gas control for standing pilot systems a compact universal valave withwiede range capacity for use in standing pilot ...

duff co accustat low voltage single stage control description high efficiency solid state thermotats for low voltage single stage systems no bimetallic elements are used advantages include choice of either preset or adjustable mercury sensors high accuracy no temperature drift and tamper-proof design built-in locking cover requires a special key applications ideal for commercial and industrial installations where accurate tamperproof control is required examples are fast-food stores restaurants churches schools retail stores etc accutemp sensors this accustat series uses preset or adjustable snap-in ...

heating danfoss duff co thermostatic radiator valves also available honeywell taco and b&g operator with valve-mounted sensor and dial built in fig no price 54078 operator with valve-mounted dial and remote sensor remote 6 capacity tube fig no 54025 operator with combined remote-mounted sensor and dial wall mount with 6 capacity tube fig no 54088 price price operator with separate remotemounted sensor and dial 2x6 capacity tubes fig no price 54089 operator with valve-mounted sensor and dial built-in tamperproof fig no price 54090 straight valve body for hot water only 1/2 solder fig no price ...

duff co heating circulators the standard of the industry most popular residential seal-type circulator quiet dependable pumping power and long-lasting performance features one-piece high tension spring steel coupler rugged bronze sleeve bearing assembly oil saturated felt pad lubrications system stainless steel shaft and a one-piece dynamically balanced impeller 007 cartridge circulators water lubricated circulators featuring patented stayclean design exclusive replacement cartridge restores pump to service quickly and economically not necessary to replace entire motor assembly taco circulator ...

heating coupler for 110 circulator 1/2 x 3/8 shaft 110-009 fig no 40081 price duff co taco woods sure-flex couplers when ordering pelase indicate desired bore of flange other sizes also available fits b&g thrush paco taco aurora peerless and many others replacement cartridge for 007 circulators complete circulating asembly includes impeeler bearings shaft and seals allows quick replacment of all circulating parts except motor without removing pump body from piping fig no 15391 price descr 3je sleeve 4je sleeves 4e sleeves 55e sleeves 5e sleeves 6je sleeves 6e sleeves 7je sleeves 7e sleeves ...

duff co heating taco zone valves taco zone valve each with its own taco thermostat permit accurate temperature control of individual rooms or groups of rooms in residences or commercial buildings exclusive heat motor functions silently beryllium copper metal bellows separates system water from the atmosphere for positive leak proof operation easy to service replacement power head 2-way size 3/4 1 1 1/4 fig no 9554 9555 15384 price power head only fig no 9568 price size 1/2 3/4 3-way fig no 48917 54280 price nema rated transformers general purpose designed to operated any 24v ac control system ...

heating bell gossett pumps for hydronic heating and cooling systems and water heating service bell gossett booster pumps represent a long process of refinements for performance improvement over 8,000,000 sold all b&g booster pumps have these quality features quiet vibrationless b&g built ul listed motor oversized super-finished shaft long sleeve-type bronze bearings noise dampening coupler continuous oil lubrication system true centrifugal impeller bearing assembly designed for top performance and easy service circulator pump #100 2 with flanges hv hv bronze pr ci pump pr bronze 100 bronze 2 ...

duff co heating flange tool to install and remove circular flanges fig no price 7215 b&g booster pump parts all parts for b&g pumps are readily available pump series 100 3/4 1 1/14 1 1/2 series 100 bronze hv 2 iron hv 2 bronze pr iron bronze 2 1/2 ld3 hd-3 60-11-s 60-13-s 60-14-s 60-15-s 60-16-s 60-17-s bearing impeller coupler body motor seal motor body assembly gasket mount gasket fig price fig price fig price fig price fig price fig price fig price fig price no no no no no no no no 8335 8403 8428 8431 8417 8417 8417 8397 8397 8397 8371 8371 8371 8440 22113 8434 41334 8259 8226 8223 56327 ...

heating duff co spiralink permanent replacement coupling for b&g theo and armstrong pumps single retrofit elminates future coupling replacement easy installation reduces labor hours and down-time superior flexibility extends pump life by absorbing torque load on bearings and seals model versatility reduces coupler inventory up tp 70 b&g 75 100 125 150 1-1/2 2 2 1/2 ld3 hd3 hv 1 hv 1-1/4 hv 1-1/2 1 pr pd-35 pd-37 pd-38 pd-39 old new 60-1 60-2 60-3 60-4 60-5 60-6 60-8 60-11 60-13 60-14 60-15 60-16 60-17 60-19 armstng hp rot shaft b&g armstrong fig no price 5-25 5-34 5-35 5-45 s-46 1 1/2 118705 ...

duff co heating expansion tanks filltrol provides added filling control to the benefits of the extrol system includes a built-in valve and check valve for reducing supply water pressure and maintaining minimum system maximum working pressure 100psig maximum operating temperature 240of 1/2 fpt fig no 8525 8530 8771 8772 model 109 110 111 112 total vol gals 4.4 7.6 14 accept vol gals 1 2.5 2.5 11.5 diameter ins 8 11 11 15 3/8 length 14 3/4 17 3/4 24 5/16 23 price filltrol combination package with air purge vent specify type and size air purger required max working pressure 100 psig maximum operating ...

heating expansion couplers temperature range 40of to 240of working pressure up to 60 psig fig no nom tube size length compressed extended max o.d price duff co flexible connectors working pressure for 1/2 55 psig for 3/4 40 psig test pressure 150 psig 9 copper tube-8 flex-2 copper tube fig no 8781 8782 nominal copper tube sizes 8480 8487 8490 3/4 1 1 1/4 5 5 7/16 5 3/4 7 1/2 8 8 1/2 1 3/8 1 5/8 1 7/8 copper tube size 1/2 3/4 price nominal female pipe sizes 8495 8499 8504 3/4 1 1 1/4 7 3/16 8 1/8 8 3/8 9 1/4 10 3/16 10 1/2 1 3/8 1 11/16 2 fig no size balancers bronze maximum working pressure=125 ...

duff co dielectric union copper x female swt x fip size 1/2 3/4 1 1 1/4 1 1/2 2 fig no 5723 5725 5726 5728 5729 5731 price dielectric fittings heating dielectric union female ip size 1/2 3/4 1 1 1/4 1 1/2 2 fig no 49244 44816 49354 49355 49356 49357 price dielectric union copper x male ip size 3/4 fig no 53571 price dielectric union flanged copper x female size 2 2 1/2 3 4 fig no 84156 36514 50056 62005 price braukman pressure regulating valve single union with threaded tailpiece inlet and outlet both male threaded for union on either or both ends 400 psi inlet 15-150 ips outlet flo valves b&g ...

heating spirovent junior duff co use the junior for residential and light commercial jobs it comes in 3/4 1 1 1/4 and 1 1/2 female-threaded sizes and is made of solid brass for long life all models except for the 3/4 model are tapped 1/2 at the bottom to accommodate a bladder-type compression tank size fig no price 3/4 1 1 1/4 1 1/2 76637 76638 76639 84168 air elimination for hydronic systems spirovent senior use this mild-steel unit in larger commercial and industrial applications with pipe sizes from 2 to 36 male npt flanged or weld connections its operation is identical to and ...

duff co watts relief valves heating watts 374a special pressure hot water boiler relief valve 3/4 only 550,000 btu watts 530 calibrated pressure relief valve calibrated adjustment feature for setting valve to relief pressure adjustable range 50-175 lbs all brass construction and stainless steel spring ideally suited as by-pass thermal expansion relief valve 3/4 fig no 3842 price fig no 3774 price watts 100xl asme rated self-closing t&p relief valve for water heaters up to 100,000 btu/hr a thermostat with thermo-bonded non-metallic protective coating and a highly protective dielectric carrier ...

heating watts 1156f iron feed water pressure regulator features highest capacity performance twice that of contemporary popular competitive makes as well as unique simplified servicing accessibility for complete unitized maintenance max temp 212of max pressure 100 psi fig no 3792 all 1/2 models furnished with a purge lever because of the exceptional high capacity feature of these watts designs the lever is only necessary for purging of the system when the lever is raised to a vertical position it manually forces the valve wide open returning the lever to its normal position permits the valve to ...

duff co watts 174a a.s.m.e water pressure safety relief valve bronze body safety relief valves for pressure protection only of all types of hot water heating boiler equipment pressure range 30 to 150 lbs with corresponding high btu/hr female inlet and outlet connections sizes 3/4 to 2 meets military spec mil-v-136-12d type iii setting and relieving capacities national board certified ratings btu stemam discharge capacities size 30 lbs 100 lbs 125 lbs 150 lbs 2,445,000 650,000 1,695,000 2,070,000 3/4 3,795,000 1,005,000 2,635,000 3,215,000 1 6,340,000 1,682,000 4,399,000 5,370,000 1 1/4 ...

4 available call now for your special pricing kunkle pop safety valve stainless steel ... 1/2 to 2 available call now for your pricing kunkle pop safety valve high pressure ... 1 available call now for your special pricing page 311 for additional information ...

duff co aqua-mix aquamix anti-scald proportional thermostatic mixing and diverting valve aquamix offers anti-scald anti-chill protection and meets the new plumbing codes aquamix accurately adjusts maintains and limits the hot water temperature to a desired setting selected by the user in domestic applications it makes the use of hot water safe and saves money applications domestic water space heating radiant floor heating hydro heat combo systems heat pump systems solar hot water nursing homes greenhouses public facilities industrial applications photo processing fig no 45160 45162 48923 48921 ...

heating dole steam vents duff co no 1a vari-vent adjustable to no 1933 angle valve for radibalance steam distribution 1/8 ators 1/8 connection nickel angle connection for radiators plated chrome plated fig no price fig no price 8875 8884 no 1933 1/8 1/4 straight shank air valves for convectors pipe coils etc nickel plated size fig no price 1/8 1/4 8887 30968 no 1933 straight shank air valve for convectors pipe coils ect 3/4 male x 1/2 female nickel plated no 4 quick vent for mains does not close against water 3/4 male x 1/2 female connection chrome plated economy steam air valve good ...

duff co no 1-a air valve a float-type vent with adjustable port for true proportional venting port settings from 1 slow to 6 fast venting operating pressure up to 1 1/2 psi max pressure 10 tem not requiring psi ing 1/8 angle hoffman air valve heating no 40 steamair valve a float-type vent with a single nonadjustable port for use on ordinary one-pipe sysproportional ventno 500 steam or water air valve for convectors and radiators a disc-type vent with built-in check valve for automatic venting can be taken apart for cleaning without removing from lime.1/8 straight shank max steam pressure ...

heating no 7 for vertical mounting 4 3/8 x 2 1/4 with 1/8 ip female connection for water duff co air vents auto vent #67 for vertical mounting 3 3/16 x 1 1/2 with 1/4 ipt male connection for water model 67 68 fig no 17686 49276 price short stop with a short stop valve installed in a maid-omist 67 air vent water can flow around the extended valve mechanism into the vent when the air vent is removed from the line the mechanism automatically retracts to shut off the flow of water fig no 17687 price industrial air vent built-in shutoff includes vent cap and leakage guard 3/4 male x 1/2 female ...

duff co adjustable industrial thermometer 9 case 3 1/2 stem 30-240o other ranges available s-40-160 -10180 0-160 30300 50-550 heating thermometers angle hot water thermometer straight hot water thermometer with iron well with iron well fig no 16470 price fig no 16471 price with brass well fig no 16483 price with brass well fig no 16473 price price solar digital fig no 16491 price fig no 85098 dial thermometer hydro thermometers boiler gauge trindicator 68of-250of 0-60o 0-130 ft h2o brass well 3/4 mount fig no fig no 16501 price 2 1/2 back 3 1/2 back 3 1/2 lower 16903 16921 16925 price 1/2 ...

8 npt to 1 1/2 npt available call for pricing 1/4 brass angle 17060 straight 17056 ...

duff co automatic ductile iron or stainless steel gauge for steam 250 pounds at 450o f liquid level up to 500 pounds heating water gauge sets pvc gauge polyvinyl chloride non-automatic or automatic hand wheel shut off for pressure up to 125 pounds at 75of sugject to limitations of gauge glass material used conforms with or exceeds requirements of aisa astm and/or api-asme for maximum recommended pressures and temperatures specify for steam or liquid level as automatic balls must be removed for steam ruber washer for 5/8 glass 9/126x13/16x3/8 3/4 glass 11/16x15/16x3/8 rods 1-1/4 shorther than ...

heating water gauge sets duff co gaugeglasscutter standard gauge glass cutter with carbide whel for round tubular gauge glasses fig no 17470 price steel gauge valves call for price and availability pinch and cut glass cutter squeeze pop glass cutter cuts cast iron tile and asbestos cement pipe in seconds with no tyurning cutter chain is wrapped around tubing right at the point where cut is to be made any length from 1/2 to several feet may be cut custs up to 3/4 od fig no price forged bronze for cutting by the rotation of a hardened steelwheel about the outside of a tube of any size not larger ...

duff co heating gauges 3 1/2 face lower mount rnemut fig.no ag on price fig no price stainless pressure gauge 1/4 lower mount 2 1/12 face 100 lb 160 lb 100 lb liquid fill 36529 36530 45439 1 1/2 face lower mount back mount rnemut fig.no ag on 0-15 0-60 0-100 0-160 0-300 0-15 0-30 0-30 0-60 0-60 0-100 0-160 0-160 0-200 0-300 0-300 0-400 0-600 0-1000 0-4000 0-5 0-15 0-30 0-30 0-60 0-60 0-100 0-100 0-160 0-200 0-300 0-400 0-600 0-1000 0-2000 0-3000 0-5000 1/4 1/8 1/8 1/8 1/8 1/4 1/8 1/4 1/4 1/8 1/4 1/4 1/8 1/4 1/4 1/8 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/8 1/4 1/8 1/4 1/8 1/4 1/4 1/4 1/4 1/4 1/4 1/4 ...

heating replacement parts duff co mcdonnell miller replacement parts no 2 cut-off and alarm switch model #2 used to add electrical low water cut-off to mechanical boiler water feeder supplied as part of the feeder cut-off combinations or can be purchased separately and added in brief time has high voltage terminals for low water cut-off and for low water alarm electrical ratings underwriters listed ampere rating 115v dc .5 amps motor duty full load locked rotor 115 vac 10.2 61.2 fig no 8858 fig no 8995 price no 14 blow off valve for 67 series and no s 47 47-2 467b 767 shipping wt 2 lbs no 11 switch ...

duff co heating mcdonnel miller make-up water feeder for boiler feeder cut-off combination for receiver tanks direct mounting feeder cut-off combination closed heating system steam boil eliminates need for equalizing larger feeding capacity than connections model 21 ers up to 5000 sf model 47-2 #8840 for steam and hot water fig no price boilers model 51-2 fig no price make-up water feeder for low pressure steam boilers float operated integral strainer monel seat maximum water supply pressure 100psig maximum boiler pressure 25 psig model 25a feeder cut-off combination for higher pressure service ...

duff heating mcdonnell miller replacement gaskets not shown actual size body gasket catalog #co-12 part #302600 used in 42 61 63 64 65 fig no price 8969 co float body gasket catalog #37-26 part #312700 used in 47 fig no price 8954 gasket cat #co-11 part #302500 used in 63 gasket cat #37-28 part #312900 used in:53 3155 21 25a 51 fig no price 8957 fig no price 8968 gasket cat #21-12 part #310800 used in 21 fig no price 8951 for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices page 323

duff co not shown actual size heating mcdonnell miller replacement gaskets head gasket cat #150-14 part #325400 used in 93 193 150 fig no price 8965 gasket cat #f-26 part #304100 used in 221 25a 51 53 3155 fig no price 8971 valve bracket gasket cat #37-27 part #312800 used in 47 51 53 3155 fig no price 8955 bellow base gasket cat #150-9 part #325300 used in 42 150 fig no price 8962 for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices page 324

lb flanged call our heating experts for pricing and availability for additional ...

duff co heating steam traps float thermostatic steam trap designed to freely remove large quantities of condensate for use on unit space heaters water heaters converters pressing machines steam process equipment draining mains risers low pressure heat exchangers coils features noiseless operation in-line servicing two side inlets outlets easy installation valve seat float air vent stainless steel range 15lb size 3/4 1 1 1/4 1 1/2 2 fig no 8924 8929 8941 8945 8946 price 30 lb fig no 35680 35681 44772 47233 47234 price 75 lb fig no 42541 42542 42543 42544 47235 price 125 lb fig no 8947 ...

heating steam radiator traps duff co no 17c low pressure traps max operating pressure 25 psi 1/2 x 1/2 angle fig no price 7632 no 8c angle steam trap 3/4 pipe connections body cap nut and tailpiece are of high quality brass seat and thermostat are renewable the thermostat pin and seat are constructed of a non-corrosive alloy to give long life under actual service conditions stainless steel pin and seat available max 25 psi fig no 7635 price no 17c swivel pattern 1/2 x 1/2 max 25 psi fig no 7634 price no 8c straightway steam trap 3/4 pipe connection for radiator or convector locations which ...

duff co heating regulators temperature regulator watson mcdaniel style 0 used to increase the temperature good for steam of a medium liquid or gas by pressure reducing valve remotely sensing that medium s pressure reduction for numerous temperature and throttling steam types of systems and equipment flow to it typical uses are platindustrial plants hospitals ing or finishing tanks hot water hotels power plants etc a generators and storage tanks small highly-versatile valve that heat exchangers fuel oil storage tanks and heaters offers a wide range of reduced pressures it provides steam tables open ...

heating type r adjustable relief valve recommended for unloading operatings on oil chemical non-corrosive substances and water lines used for pump bypass relief back pressure relief open tank discharging and pump closing relief adjustment is done by removing the cap and adjusting the regulating screw installed in an upright vertical position caution should not be used as emergency or safety relief valve found in the following applications water pump bypass irrigation sprinkler system on golf courses fountains fire protection systems fuel oil pump bypass on commercial systems or large residential ...

duff co heating pressure motive pumps applications the pressure motive pump pmp is recommended when liquids must be moved to a higher elevation higher pressure or great distances typical applications are condensate from vacuum or low pressure system condensate systems with high back pressure any steam condensing equipment ie heat exchangers condensers turbines remote installation ie tanks farms where electricity is not available where electricity is prohibited ie some underground steam distribution systems tank farms etc submersible hard-to-get-at areas with fluids such as acids the series pump ...

1 1/4 1 1/2 available call today for pricing and availability mai n control aga gas ...

duff co heating quik-fix quik-fix radiator steam trap replacement kits designed so that it could be easily used to rebuild almost any of the popular radiator traps currently in use many of the original manufacturers models and parts for steam radiator traps are no longer available additionally as existing heating systems expanded different traps were used creating a spare parts inventory problem quik fix replacement kits address both these situations by offering a kit which induces a thermostatic capsule that is the same for all traps and a simple easy to install adapter once installed the steam ...

heating steam trap repairs duff co call duff for all your steam needs 610-275-4453 barnes jones dunham-bush hoffman illinois marsh sarco trane warren-webster for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices page 333

within a few days call today for your pricing and availability all sizes available ... in case quantity only please call for pricing and availability electronic air ... in case quantity only please call for pricing and availability media filters and ...

heating e in 5 ailabl lso av engths a l or 10 duff co smoke pipe galvanized smoke pipe 2 foot sections size 3 4 5 6 7 8 9 10 12 14 fig no 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 price smoke pipe adjustable elbow size 3 4 5 6 7 8 9 10 12 14 18 fig price no 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 37996 smoke pipe tee smoke pipe y size size 3 4 5 6 7 8 9 10 12 14 fig no 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 price 3 4 5 6 7 8 9 10 fig no 10837 10839 14155 10846 10851 14819 10858 10859 price smoke pipe reducers size 4x3 5x3 5x4 ...

duff co all fuel stainless steel and aluminum chimney liner kit heating heating accessories all fuel chimney type b gas vent for use with low-heat appliances sized 6 to 12 call now for specs for venting all listed gas appliances having draft hoods sized 3 to 8 oval and round call now for specs ready for immediate delivery call with your specifications draft regulator for oil and solid fuel field type swh side wall vent hood designed for standard vent pipe and class b type double wall connection to be used inside wall venting of oil or gas fired heating systems provides proper clearances between ...

heating duct duff co flexible metal duct fits standard sheet metal fittings self-supporting eliminates fittings excellent air flo lightweight aluminum 8 compressed to 30 vinyl covered flexduct flexible hose vinyl covered high-tensile steel wire covered with vinyl impregnated fiberglass cloth temp range 0-250of gray canvas with wire simple to connect and install flexible duct connectors general purpose venting fume and dust removal drying and cooling plating tank vents oil vapor vents 25 coils size fig no price light weight size 3 4 5 6 7 8 9 10 12 14 fig no price 14529 14535 14537 ...

duff co heat by the foot unlike conventional series heaters frostex is constructed with parallel electrical circuitry this allows it to be cut to any length without changing its heat output per foot specially designed power plug and end cap complete the heater assembly quickly and easily the heating element in frostex is a continuous core of semi-conductive polymer plastic that varies its electrical resistance with temperature change safer longer lasting and more reliable won t overheat needs no thermostat ok for steel copper and plastic pipe cut to any length truck pack includes 50 frostex ...

heating rubatex armaflex/rubatex closed cell pipe insulation duff co iron pipe diameter 3/8 wall thickness fig no 13945 13946 13948 13949 13950 13951 17775 17776 17777 17778 1/2 wall thickness fig no 13956 13957 13959 13960 13961 13962 17785 17786 17787 17788 17790 3/4 wall thickness fig no 28592 28593 28595 28596 28597 28598 28619 28620 28621 28622 28624 1 wall thickness fig no 28627 56753 28609 62023 28631 28632 62028 62027 box qty 480 420 306 252 168 144 120 96 72 54 price per foot box qty 360 306 252 168 144 120 120 72 54 48 24 price per foot box qty 216 168 144 120 96 96 72 54 36 30 ...

duff co heating fiberglass pipe insulation easy on fiberglass pipe covering heavy density in 3 foot lengths for use on surface temperatures to 500of 160oc 650of343oc when applied min 2 thick see page 128 for insulation shields all service jacket with self-sealing lip iron pipe ips diameter 1/2 wall thickness fig no 13887 13888 13889 13890 13930 13892 13893 13894 13895 13897 13898 13899 28579 28580 28581 1 wall thickness fig no 13900 13936 13902 13903 13939 13905 13906 13907 13908 13910 13911 13912 20167 28583 28585 1 1/2 wall thickness fig no 13913 61994 13915 13916 13917 13914 13919 13920 ...

heating zeston fittings duff co zeston pre-molded pvc fitting covers for fiberglass insulation pre-molded pvc insulated fitting covers temperatures to 500of high-low temperature inserts furnished with fitting secured by tacking banding or taping ends to adjacent pipe covering 90 zeston fig no price fig no 45 price fig no tee price 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 22 25 13969 13970 13971 13972 13973 13974 13975 13976 13977 13978 13979 13980 13981 13982 13983 13984 13985 13986 38442 38562 13987 13988 13989 13990 13991 14107 14108 14109 14110 14111 14112 14113 14114 14115 14116 14117 ...

duff co rubatex foam heating tape 2 x 30 insulation accessories aerosol bond adhesive fast easy way to bond materials such as fibrous glass paper foil cork polystyrene foam plastic sheeting foam rubber cardboard felt cloth etc to themselves or to metal glass and wood for thermal insulation of hot or cold pipe fittings and valves stops condensation reduces heat loss on heated pipes and fittings seals out air sound and dirt convenient and easy to apply self adhering rolls will not dry out decay or crack fax your order 610-279-6299 protective coating white preflex protective coating gives an attractive ...

heating gas range connectors and adapters residential commercial duff co ask about safety cable gas appliance connection stainless steel iapmo ansi meets requirements for inside or outdoor use length 3/4 female price 24 36 48 60 72 16738 16743 16750 16761 16765 commercial gas connectors aga ansi corrugat ed stainless steel hose covered by stainless braid with smooth plastic covering for easy cleaning also ideal for equipment on casters size fig no 1/2 x 24 1/2 x 36 1/2 x 48 1/2 x 60 3/4 x 24 3/4 x 36 3/4 x 48 3/4 x 60 1 x 24 1 x 36 1 x 48 1 x 60 1 1/4 x 24 1 1/4 ...

duff co fit all thermocouple kit heating heating accessories tank sticks thermocouple tester see page 732 for water finding paste for quick testing of thermocouple output provides visual indication of proper thermocouple operation fig no 66260 size 18 24 36 fig no 16852 16858 16864 price price size 9 ft 14 ft fig no 25678 29220 price thermostat cable with plastic jacket self tapping boiler plugs size 1/4 5/16 3/8 7/16 fig no 16799 16804 16812 16817 price size 18-2 18-3 18-4 18-5 18-6 fig no 8838 8845 8864 8865 8867 price floor and ceiling plates electrical tape copper size fig no price iron ...

tanks 240-30,000 gallon call now for pricing and availability fireguard tanks 500-12 ...

duff co size 2 x1 1/4 26 27 2 x1 1/4 42 44 2 x1 1/2 26 27 2 x1 1/2 42 44 heating ventalarm gauge the original whistle alarm fig no 9610 9609 47592 47591 scully systems price all weather locking cap this cap fits the top of all scully straight and 45o adapters and features a new heavy weight design operates with magnetic key fig no 58987 price econo gauge inexpensive and accurate fits 1 1/2 or 2 tank size 26 27 37 42 48 fig no 9608 49281 9607 49281 price golden gallon gauges snorkel gauge level indicator with floating burner feed line fits 1 1/2 or 2 ideal for mobile homes double ...

and wired call now for your special pricing for additional information call 610-275 ...

duff co copper hot water heating hydronic specialties iron pipe hot water radiator valve steam radiator valve price straight radiator valve radiator valve size fig price no 1/2 3/4 16635 16639 size 1/2 3/4 1 radiator elbow fig no 16615 16618 16620 price size 1/2 3/4 1 1 1/4 1 1/2 2 fig no 16643 16647 16652 16655 16656 16658 fig no 1/2 16660 3/4 16666 1 16671 1 14 16677 1 1/2 16690 size price size size 1/2 ip 3/4 ip 1/2 cop 3/4 cop fig no 16711 16716 16729 16730 fill box price 3/4 1 1 1/4 1 1/2 2 3 4 mushroom vent cap fig no price 16427 16428 9613 9614 9615 16432 16453 double tapped tank bushing ...

heating fuel and air filters general fuel oil filter industry standard for domestic and commercial fuel oil systems all models feature cast iron filter base with sturdy steel case filters are held within the case with a knife-edge seal at top and bottom to insure that nothing bypasses the filter cover has air vent port on outlet side 16454 for most domestic and light commercial burner systems maximum firing rate of 10 gph on #2 oil uses wool-felt type cartridge 38831 for large capacity burner systems or domestic systems with multiple burners maximum firing rate of 25 gph on #2 oil uses wool-felt ...

duff co oil burner nozzles heating hollow gph .65 .65 .75 .75 .75 .85 .85 .85 1.00 1.00 1.00 1.10 1.10 1.10 1.20 1.20 1.20 1.25 1.25 1.25 1.35 1.35 1.50 1.50 1.50 1.65 1.65 1.75 1.75 2.00 2.00 page 350 solid gph .65 .65 .65 .75 .75 .75 .85 .85 .85 1.00 1.00 1.00 1.10 1.10 1.10 1.20 1.20 1.20 1.25 1.25 1.35 1.35 1.50 1.50 1.65 1.65 1.75 1.75 2.00 2.00 3.00 3.50 angle fig no price 80 90 60 70 80 60 70 80 60 70 80 60 70 80 60 70 80 60 70 80 60 80 60 70 80 60 80 60 80 60 80 16457 16465 16466 16468 16475 16477 16481 16482 16485 16488 16489 35874 35875 35876 16490 16493 16496 16498 16500 16502 16504 ...

heating conversion chart duff co for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices page 351

duff co duff quiz 1 how many british thermal units btu s are required to raise one pound of water 1 degree fahrenheit a 212 b 100 c 1 d 513 2 a b c d 3 a b c d one cubic foot of water weighs 1 lb 8.33 lbs 7.48 lbs 62.4 lbs one gallon of water weighs 1 lb 8.33 lbs 7.48 lbs 62.4 lbs 5 how many btu s are in 1 kilowatthour a 212 b 3,412 c 1,000 d 62.4 6 if you mix 180-degree hot water with 40-degree cold water to obtain 140-degree tempered water what percentage of the mixed water is hot water a 88.3 b 71.5 c 75.2 d 50.0 7 if you have a storage tank that is 30 inches in diameter by 60 inches high how ...