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Jul 1, 2004 12:00 PM

Spirax Sarco Inc has introduced Series 211 and Series 632 safety valves for air, gas, steam, and liquid applications. These valves provide reliable overpressure protection in system components such as air or gas compressors, pressure vessels, piping, boilers, accumulators, cleaners, and process equipment.

The safety valves have a dual-ring design for easy adjustment, precise opening, and high-volume, short blowdown, with high liquid flow capacity. Nozzle and disc are changeable to accommodate changing conditions and processes. A special disc, seat, and stainless steel spring design provides a consistent bubbletight seal.

The safety valves, certified for ASME Section I or Section VIII Code applications, serve an operating pressure range from 5 to 250 psi, with a 250-psig maximum set pressure at 406° F. Relief performance is 39-7,810 SCFM (D-J orifice) for air, gas, or vapor; 111-22,148 lb/hr (D-J orifice) for steam; and 9-478 gal/min (D-H orifice) for liquid. Safety valve bodies are bronze. Nozzles come in brass or 316 stainless steel; discs in brass or 316 stainless with a PTFE soft seat; and springs in PH stainless, 316 stainless, Inconel, X750, or MP35N. Lift lever and soft seat configurations are available.

Additional information is available from Spirax Sarco, 1150 Northpoint Blvd, Blythewood SC 29016.