PRV before Reduced pressure backflow?
PRV before Reduced pressure backflow?
(OP)
Is there any reason that you cannot put a pressure reducing valve before a reduced pressure backflow on an incoming fire service? I can't seem to find anything that says you can't.





RE: PRV before Reduced pressure backflow?
RE: PRV before Reduced pressure backflow?
http://www.eng-tips.com/viewthread.cfm?qid=361483
RE: PRV before Reduced pressure backflow?
13.5.4 Master Pressure-Regulating Devices.
13.5.4.1* Devices shall be inspected weekly to verify that the
devices are in the following condition:
(1)*The downstream pressures are maintained in accordance with the design criteria.
(2) The supply pressure is in accordance with the design cri- teria.
(3) The devices are not leaking.
(4) The devices and trim are in good condition.
13.5.4.2* A partial flow test adequate to move the valve from its seat shall be conducted quarterly.
13.5.4.3* A full flow test shall be conducted on each valve annually and shall be compared to previous test results.
13.5.4.4 When valve adjustments are necessary, they shall be made in accordance with the manufacturer’s instructions.
RE: PRV before Reduced pressure backflow?
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