Valve can be used for non-corrosive or mildly corrosive fluids, depending on the materials selected (consult factory). When liquids or gases contain debris or other solid matter which might cause internal clogging or improper operation of the valve, a strainer with a fine wire mesh should be installed before the inlet of the valve. In-line strainer fittings STF-05 or basket strainer models SBS-10 or SBV-05 can be purchased from Straval to solve this problem.
This valve will work quite well on applications where the inlet pressure will not fluctuate widely. However, where this condition does exist and the outlet pressure needs to be controlled closely below 80 psi, a pressure-reducing valve with a balanced design is recommended such as the Straval model PRS-09i. Although the body has a high pressure rating, inlet pressures above 300 psi (~20 bar) are not recommended, especially when outlet pressures below 15 psi (~1 bar) need to be controlled. Even though the body is rated to pressures up to 1500 psi (~100 bar), permanent deformation to the diaphragm may occur if the seat is unable to shut off properly and will require replacement under these extreme conditions. For higher inlet pressures see our high pressure models PRH04 and PRH09.
Features & Benefits
- Pressure-containing parts made from solid bar stock materials — unlike castings which have wall thickness variations.
- Body: Standard materials are carbon steel &stainless steel. Special alloys (e.g. Monel, titanium, Hastelloy, are available within reasonable lead times).
- Trim: Stainless steel for poppet, diaphragm, and internal valve spring is standard.
- Seat: metal to metal or with choice of soft seats, e.g. PTFE (Teflon), Viton or Epdm for air or gas service for tighter shutoff. See Temperature limits shown with material listings
- Metal diaphragm seal permits valve to operate at cryogenic and elevated temperatures to 600 °F (315 °C). but only when selecting a metal seat
- In-line porting allows for simplified piping installation.