Description
Direct-Acting Backpressure Sustaining/Relief Valves
Spring-loaded, direct-acting, diaphragm operated, pressure balanced design
Standard all bronze globe body with threaded ends for 300 PSI maximum inlet pressure.
Sensitive adjusting spring for accurate inlet pressure control over a wide flow range
Manufactured in sizes ½ to 2 inches (12 to 50 mm) for flows up to 150 GPM (9.5 l/sec).
Also available in all stainless steel and higher pressure designs.
Function and Applications
Sustains upstream (inlet) pressure to pre-set minimum regardless of variations in demand, closing tight if upstream pressure drops below minimum. Municipal and industrial uses include maintaining minimum pressure on pump or process (e.g., a water softener) and as a pressure relief valve.
