We get calls about selecting, applying and setting differential pressure bypass valves (DPBVs). 0000019394 00000 n
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Adjustable from 2 to 10 psiBrass bodyMax working pressure: 150 psiWorking temp range: 32 - 230F3/4" flow up to 9 gpm1" flow up to 40 gpm1-1/4" flow up to 45 gpmHCAL123310, -{[{ ps.productSalePercentage | number:0 }]}%, Caleffi 553549A - 553549A AutoFill Automatic Boiler Fill Valve, Pressure Indicator, 1/2-Inch Sweat Inlet by 1/2-Inch, Caleffi 519599A - 3/4" Union Sweat Differential Bypass Valve. 0000020372 00000 n
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b) Open up all zone valves. Get expert advice and be the first to hear about new products and special promotions. Excessive differential pressure between supply and return lines is undesirable and can deadhead a pump, prevent zone valves from fully closing, cause circuit imbalance, and can result in corrosion, water noise and water hammer. 0000001759 00000 n
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Caleffis Technical Brochure 01007 explains more and describes how to adjust the DPBV set point. Caleffi's 519 Series prevents excessively high head pressure (a result of the branch piping 2-way zone valves closing)by allowing flow from the supply piping directly to the return piping. 0000436839 00000 n
If you do not, interest will be charged on the promo purchase from the purchase date. Your submission has been sent successfully. 0000009879 00000 n
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It will bypass the differential pressure created by the pump as the zone valves close, thus eliminating water hammer noise. 0000021479 00000 n
The Caleffi Differential Pressure By-pass Valve is used in systems with a fixed speed circulating pump supplying several zones controlled by two way zone valves. Suggested monthly payments with 6 month financing. Fire boiler and pump(s). %PDF-1.3
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xb```a````c```@ ;Pcw8pY.1c%n,v4Nq+M'@Wr-|e_?yiK/d DPBV's are not needed when using a pressure-controlled variable speed pump. h\QKHa-w(SL):v ~h+PeKKA=2wo> Xv`<
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T"{wRDS3P:v`>OL[/"8h-Ov]ES4So$I$d!DT,SUeSpB19f To see the manufacturer's warranty statement, click on the Manuals tab. 0000006659 00000 n
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