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Quick Overview


Mounting Surface: 800 Oilgear Standard Cavity

Max Pressure: 5000 PSI (345 bar)
Rated Flow Rate: 19 gpm (72 l/min)

The HSPRR valve is used to provide and maintain a regulated pressure to a secondary circuit that is lower than the supply pressure. The valve also provides a relief function for the regulated circuit at a pressure slightly above the reduced pressure setting (approximately 3%).

The outlet pressure (port 1) is transmitted thru an orifice in the center of the spool to the pilot relief valve (in the upper portion of the body). When the outlet pressure exceeds this valve setting, the pressure on the top side of the main spool and sleeve is relieved (thru port 4). A pressure imbalance then exists across the main spool. The main spool and sleeve tend to rise and throttle or shut-off flow between ports 2 and 1. If the pressure in the secondary circuit (port 1), which is now shut-off from the main circuit (port 2), rises above the relief valve setting, the pressure on the top side of the spool is relieved again (thru port 4), again creating a pressure imbalance across the main spool. The pressure at port 1 pushes the main spool and sleeve higher in the body until port 1 is connected to tank (port 3). In this position port 2 still remains blocked.

Two valve functions from one low cost cartridge. Several pressure ranges available with this high accuracy pilot operated design.

The cartridge is constructed of steel parts, and operating parts are hardened as required. The cartridge is designed for easy service or field repair.

Rated Flow (Δ 100 psi/7 bar) 19 gpm 72 l/min
Max Operating Pressure 5000 psi 345 bar
Adjustable Pressure Range 07 50 to 700 psi 3 to 48 bar
20 50 to 2000 psi 3 to 138 bar
35 50 to 3500 psi 3 to 241 bar
50 50 to 5000 psi 3 to 345 bar
Viscosity Range 27 to 2000 SSU at 100 °F 1 to 432 cSt
Temperature Range -40 to +350 °F -40 to +175 °C

Product Specifications