Product Detail


Quick Overview


Max Pressure: 5000 PSI (345 bar)
Max Flow Rate: 210 to 230 gpm (796 to 872 l/min)

The HSPO normally open cartridge type poppet valve can be used as a pilot operated check valve, a directional control valve (one or more cartridges can be used to provide 2-, 3-, or 4-way functions), or a prefill valve.

The main spool (poppet) is held open by a tension hook type spring suspended between the bonnet and the spool. Opening and closing of the valve is a function of the force balance in three areas: diameter "X" (port 3), diameter "X-Y" (port 2), and diameter "Y" (port 1). Pilot pressure acting on the top of the main spool tends to close the poppet.

Port 1 and 2 areas are smaller than 3, but if a higher pressure is present at those ports it may cause the poppet to open.

Availability of two (different) ratio poppets (spools) and springs provides a variety of closing/cracking (opening) ratios. The valve is constructed of steel parts, operating parts are hardened and ground as required. The cartridge is designed for easy service or field repair.

Ratio (Y to X) 1 : 1.25 1 : 1.67
Max Flow (Δ 100 psi/7 bar) 230 gpm 872 l/min 210 gpm 796 l/min
Max Operating Pressure 5000 psi 345 bar 5000 psi 345 bar
Cracking Pressure 14 psi 1 bar
32 psi 2.2 bar
Viscosity Range 27 to 2000 SSU at 100 °F
Temperature Range -40 to +350 °F -40 to +175 °C

Product Specifications