This is a Basic Engineering (Q&A) video about "Difference between Pressure Reducing Valve and Pressure Restricting Valve PRV in Urdu and NFPA Pressure Restricting Valve PRV/Standpipe pressure reducing valve/standpipe pressure restricting valve/firefighting pressure restricting valve" in Urdu/Hindi language. Here I have explained your question's answer about pressure valves. It is basic learning information about the firefighting or water supply system. It is also important for HVAC/MEP technical staff. Here sharing my experience and knowledge that will be helpful for Engineers and Technical staff about this topic.

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