Description
When pressure at 2 rises above the spring bias pressure, the check seat is pushed away from the piston and flow is allowed from 2 to 1. When load pressure at 1 rises above the pressure setting, the direct-acting, differential area relief function is activated and flow is relieved from 1 to 2. With pilot pressure at 3, the pressure setting is reduced in proportion to the stated ratio of the valve, until fully open with free-flow from 1 to 2. The valve applies a balanced piston design allowing relief operation at the valve setting independent of back-pressure at 2. However, the piloted opening of the valve remains subject to additive pressure at port 2. The special design of the poppet allows low delta P during relief function and makes the valve especially suitable for hydraulic motors control.
Valve especially designed for motor applications, where it is requested a low delta P during relief function.
Pressure setting: at least 1.3 times the load induced pressure.
