A screw-in, cartridge type, pilot-operated hydraulic check valve, which can be applied for unidirectional blocking or load holding circuits.
HPC08 allows flow from ② to ③, while blocking flow from the opposite direction. When the sufficient pressure is applied at ①, the fluid can flow from ③ to ②. The pilot ratio for this type of valve is 3.2:1, which means that the valve cannot be opened until at least 1/3 of the load pressure of ③ is applied at ① . Under the static or no-load conditions, the valve is spring-biased to assure holding. A sealed pilot piston optional is available. Provide customized based-spring. Please contact customer service.
Flow: see performance chart.
Internal leakage:
③ to ②: max. 0.25mL/min (5 drops/min) iat 350bar (5000psi)
② to①: max. 115mL/min (7cu.in./min) at 350bar(5000 psi) (without sealed piston)
② to ①: no leakage (without sealed piston)
Pilot ratio:3.2:1 pilot ratio:
Check spring bias: Standard: 1 bar (14.5 psi); with sealed piston: min. 5 bar (73 psi)
Cracking pressure:1 bar (14.5 psi)
5 bar(73 psi)
Filtration: max nominal value: 10μm(NAS 8),ISO4406 19/17/14
Fluid: Mineral based or synthetics with lubricating properties at viscosities of 7.4~420 cSt (50-2000 ssu)
Installation: no restriction.
Cavity:VC08-3 ;
Cavity tool:T/H08-3RC-T-G(粗加工) ; T/H08-3FM-T-G(精加工)
Seal kit:SK08-3X-TM