Pressure Reducing Disc

Pressure Reducing Disc

WFR manufactures pressure reducing discs for both 1½"(38mm) and 2½"(64mm) standpipe valves. We can supply brass or plastic discs. Brass discs are sized to fit a 1½"(38mm) or 2½"(64mm) orifice and is soldered or peened into place. The plastic discs are designed with a taper to fit the 1½"(38mm) or 2½"(64mm) orifice but has a little more adjustment due to the taper for irregular size orifices of the valves. Tap into place for a snug fit.

Part #323520100

The NFPA 14, Edition 1993 states:

5-8 Maximum Pressure for Hose Connections

5-8.1 Where the residual pressure at a 1½" (38.1mm) outlet on a hose connection available for occupant use exceeds 100 psi (6.9 bars), an approved pressure regulating device shall be provided to limit the residual pressure at the flow required by Section 5-9 to 100 psi (69 bars).

5-8.2 Where the static pressure at a hose connection exceeds 175 psi (12.1 bars), an approved pressure regulating device shall be provided to limit static and residual pressures at the outlet of the hose connection to 100 psi (6.9 bars) for 1½" (38.1mm) hose connections available for occupant use and 175 psi (12.1 bars) for other hose connections. The pressure on the inlet side of the pressure regulating device shall not exceed the device's rated working pressure.