Description Valve body has threaded inlet and outlet sized to 3/4 inch schedule 40 pipe. The inlet and outlet are 90° to each other. The body inlet and outlet threads can be NPT, BSPT, BSPP or ORB (SAE J1926-1). Valve is available with metal or Teflon poppet. Valve material is aluminum with steel main spring and stainless steel poppet spring. The valve has an independent poppet to prevent back flow during operation. Rating The rated pressure drop is 1 psi (0.07 bar) @ 90 scfm (2.55 m³/min) operating @ 100 psig (6.90 barg) inlet pressure and 180°F (82.2°C) fluid pressure.  Here a scfm is one cubic foot per minute of air at 14.696 psia (1.01325 bara), 60°F (15.555°C) and 0.0% relative humidity.