NORMALLY OPEN POPPET VALVEMax 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|