Technical characteristics [ - ]
Fast-acting, pilot-operated, balanced-slide construction relief valves are normally closed pressure-regulating valves that are often used to protect hydraulic components from transient pressure shocks. The rapid opening and closing of the valve is obtained at the expense of smoothness. When the pressure at the inlet (port 1) reaches the valve's set point, the valve begins to overflow to the tank (port 2), throttling to limit the pressure rise. These valves have low pressure fluctuations with flow rate and fast response time.

Can accept pressure at port 2; suitable for use in cross-ported relief lines. Consider slide valve leakage if used in cross-ported relief lines.
Damping holes in the main stage are protected by a 150 micron stainless steel screen.
Because of slide valve leakage, it is not suitable for use in load locking applications.
The back pressure at the tank port (port 2) is increased directly to the valve setting in a 1:1 ratio.
All 2-port relief valves (except pilot relief valves) are interchangeable in size and function (e.g., valves have the same flow paths, same jacks for a given outline construction size).
The W and Y control methods are available with or without specific set values. When no specific value setting is required, the standard setting will be used and is adjustable over the full range. When set at a specific value, this specific value will represent the valve setting.
Utilizing the Sun float structure reduces the possibility of internal parts binding due to excessive installation torque or jack/socket valve machining errors.