Page 18 of Water Regulators and Blackflow Preventers & Meters by Duff Company

duff co regulators-backflowpreventers-meters shock suppressors therm-x-trol thermal expansion tank steel shell polypropylene liner butyl diaphragm max operating pressure=200of standard factory precharge 40 psig for use with potable water heaters only therm-x-trols are pressurized diaphragm-type expansion tanks designed to accept the expansion of water created when a storage tank is heated keeping the system pressure below the relief valve setting fig no max psig 43561 38696 49699 150 150 150 tank vol 2.0 4.4 10.3 sys conn 3/4 3/4 1 dia 8 11 15 3/8 price diatrol shock supressor max working pressure=100 psig max shock pressure=150 psig max operating temperature=200 o f precharge pressure=22 psig large size to 48 diameter available compressible air volume is held within a light weight deep drawn steel vessel this air chamber carefully calculated is separated from system water by a heavy-duty sealed-in butyl diaphragm that prevents loss of air and water logging the air pressure can be measured and field adjusted through the vessel air valve water never contacts steel and the the polypropylene lined water reservoir provides a 100 corrosive-free surge chamber fig no rated flow 48971 57113 9.5 104.6 conn npt 3/4 1 1/4 height 8 1/2 11 7/8 dia 9 1/8 6 1/8 volume cu ft .092 .145 price water hammer the noise from banging pipes is caused by shocks of high speed water flowing in the piping system when a fixture is suddenly closed sudden stoppage of the water a non-compressible liquid flowing at a given pressure and velocity causes a surge or spike of water and is called water hammer when this occurs a pressure wave travels back through the piping until it finds a point of relief dishwashers clothes washers fast closing positive shut off valves incorporated in the system all contribute to creating water shock which is not only annoying but damaging to pipes and appliances the watts no 15 series incorporates a permanent pre-charged sealed air chamber to absorb the shock the sealed chamber prevents the loss of air to the water and insures long and trouble free life all potential leak points are permanantley sealed npt conn 1/2 3/4 1 ot h e r ta n k vo lumes ava ilable mini-trol shock sup pressor max working pressure=150 psig max shock pressure=200 psig max operating temp=200of max velocity=10 fps total volume=10 cu inc precharge pressure=22 psig fig no 8799 hght width 4 1/2 3 3/8 sys conn 1 2n t p price mini chamber designed for single fixture use copper cylinder spun-closed seamless chamber 1.4 cu vol max operating temperature=250of arrestor length 4 1/4 not including fitting permanently sealed 60 psi pressure charge an acetal piston with three epdm orings separates a 60 psi pre-pressurized captured air cushion from system water in a seamless type l copper chamber the mini chamber arrestor is available with various system connections in individually packaged film-wrapped cards or bulk packed in cartons size fig no price 3/8 1/2 85245 85246 air preload psi 60 60 60 dimensions a b 5 1/2 7 1/2 8 1/8 1 7/16 1 7/8 2 3/16 fixture units 1-11 12-32 33-60 fig no 55131 51666 55135 price page 370 for additional information call 610-275-4453 or fax 610-279-6299 prices are a guide only please call for current prices.

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