الوصف

Spring actuated relief valves are direct acting, relying on the system’s hydraulic pressure to open when the preset force of the spring is exceeded.
Relief Valves provide overpressure protection for pumps, treating lines, pressure vessels and other equipment operating under high pressure, high flow conditions. The valves are compact, simple to operate and rely on the system's hydraulic pressure to open when a preset pressure is
exceeded and automatically snap shut when the pressure drops. The valves are externally adjustable to operate from low pressure/medium flows. Unlike shear
relief valves, which use common nails to trigger the valve, D & W SPM's Emergency Relief
Valves utilize an internal spring to activate opening and closing.
Relief Valves are available in 2" and 3" models. Operating pressures of each model range from 0
psi to *0,**0 psi. The 3" models have optional 0 psi to 5,**0 psi versions. Both standards, sour gas and certified cold temperature models are available, as well as models with DNV approval.