Page 312 of Duff Company Catalog by Duff Company

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 to protect thermostat from accumulations of mineral deposits and galvanic corrosive action extends the effective life of the valve of overcoming problems created by adverse water conditions has test lever and 4 extension thermostat male inlet and female outlet pressure range 75-150 lbs standard setting 150 lbs temperature relief 210of thermostats with special protective coating all bronze body stainless steel spring thermostat is accurate and proven exclusively designed and manufactured by watts aga btu 100,000 don t let this happen to you model fig no size height less thermostat 1 7/8 width weight lbs aga/cga temp steam btu/hr price 100xl-4 3756 3 1/2 3/4 100,000 watts series 40,140 240 340 a.s.m.e rated ansi z21.22 relief valves and automatic gas shut-off devices design certified by aga and ca listed meets military spec mil-v-136-12d type i temperature relief 210of standard pressure settings 75 100 125 and 150 lbs for gas electric or oil-fired storage water heaters between 180,000 and 200,000 btu/hr rating use 3/4 no 40 140 series tested under ansi z21.22 with ratings as certified and listed by aga and cga for gas or oil-fired storage water heaters between 200,000 and 730,000 btu/hr output heating domestic water and for steam coil storage water heaters use no 340 342 series listed under ansi z21.22 with ratings as certified and listed by aga and cga bronze body construction back=up emergency safety fuse plug vacuum relief valve vent in drain tamper-resistant bonnet screws thermostat is accurate and proven model fig no inlet outlet aga-cga temp steam rating btu/hr 200,000 200,000 500,000 500,000 570,000 670,000 730,000 1,150,000 asme pressure steam rating btu/hr 777,600 777,600 1,155,000 1,155,000 1,670,000 1,670,000 2,195,000 3,450,000 price 40xl-5 40xl-8 40xl-4 40xl-7 140s-3 140x-5 n240x-6 340-3 page 308 3725 27885 3734 40706 44342 33251 3738 3744 3/4 m 3/4 m 1 m 1 m 1 f 1 f 1 f 1 1/2 f 3/4 f 3/4 f 1 f 1 f 1 f 1 f 1 f 1 1/2 f for additional information call 610-275-4453 or fax 610-279-6299 please call for current prices.

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