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Check Valves

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  • Jacktech Pilot operated Check Valve (PCI – 10 T X 1/2″ BSP)

    52.80

    Pilot Operated check valve model CI**** allow free flow in the direction from port A to port B and offer leak free closure in opposite direction. Reverse flow can be achieved by applying Pilot pressure to its port X.

    The pilot pressure required at port X to achieve reverse flow from its closed position can be calculated using the formulae given in the technical specifications.

    Generally, to achieve smooth decompression of oil in the hydraulic actuator prior to reverse flow, it is essential to keep the pilot pressure as close to the calculated value as possible and the flow controlled.

    Seal type valves, internal drain construction. Six sizes in threaded port body. Three size subplate mounting construction. Subplate mounting interface conforms to ISO 5781 (draft).

  • Jacktech Pilot operated Check Valve (PCI – 20 S)

    91.20

    Pilot Operated check valve model CI**** allow free flow in the direction from port A to port B and offer leak free closure in opposite direction. Reverse flow can be achieved by applying Pilot pressure to its port X.

    The pilot pressure required at port X to achieve reverse flow from its closed position can be calculated using the formulae given in the technical specifications.

    Generally, to achieve smooth decompression of oil in the hydraulic actuator prior to reverse flow, it is essential to keep the pilot pressure as close to the calculated value as possible and the flow controlled.

    Seal type valves, internal drain construction. Six sizes in threaded port body. Three size subplate mounting construction. Subplate mounting interface conforms to ISO 5781 (draft).

  • Jacktech Pilot operated Check Valve (PCI – 20 T X 1″ BSP)

    91.20

    Pilot Operated check valve model CI**** allow free flow in the direction from port A to port B and offer leak free closure in opposite direction. Reverse flow can be achieved by applying Pilot pressure to its port X.

    The pilot pressure required at port X to achieve reverse flow from its closed position can be calculated using the formulae given in the technical specifications.

    Generally, to achieve smooth decompression of oil in the hydraulic actuator prior to reverse flow, it is essential to keep the pilot pressure as close to the calculated value as possible and the flow controlled.

    Seal type valves, internal drain construction. Six sizes in threaded port body. Three size subplate mounting construction. Subplate mounting interface conforms to ISO 5781 (draft).

  • Jacktech Pilot operated Check Valve (PCI – 30 T X 11/2″ BSP)

    139.20

    Pilot Operated check valve model CI**** allow free flow in the direction from port A to port B and offer leak free closure in opposite direction. Reverse flow can be achieved by applying Pilot pressure to its port X.

    The pilot pressure required at port X to achieve reverse flow from its closed position can be calculated using the formulae given in the technical specifications.

    Generally, to achieve smooth decompression of oil in the hydraulic actuator prior to reverse flow, it is essential to keep the pilot pressure as close to the calculated value as possible and the flow controlled.

    Seal type valves, internal drain construction. Six sizes in threaded port body. Three size subplate mounting construction. Subplate mounting interface conforms to ISO 5781 (draft).

  • REXROTH Piloted-to-Open Check Valves, sandwich module (Z2S 10 – 1-3X)

    194.40

    Models Z2S are pilot operated check valves in a sandwich plate design. They provide line contact closure in one or two actuator ports, even during idle periods. Piloted to open, utilizing a pressure signal from the opposite actuator port provides a self-contained function

  • SUN HYDRAULICS Flush mount pilot-to-open check valve with sealed pilot (CKBGXCN)

    177.60

    This valve is a pilot to open check valve. It has a sealed pilot, a steel seat, and is non-vented. It allows free flow from the valve (port 2) to the load (port 1) and blocks flow in the opposite direction. Pressure at the pilot (port 3) will open the valve from port 1 to port 2. Pilot pressure needed at port 3 to open the valve is directly proportional to the load pressure at port 1. Pressure at port 2 directly opposes pilot pressure.

    • Provides hose break protection, prevents loads from drifting and positively locks pressurized loads.
    • Extremely low leakage. The seat and poppet are heat treated for long life. If the load drifts due to the valve, the seat has probably been damaged by contamination and the valve should be replaced.
    • Sealed pilot for use in circuits where cross port leakage is undesirable.
    • Note: Available only with 30 psi or 75 psi (2 bar or 5 bar) check valve cracking pressures.
  • SUN HYDRAULICS Free flow nose to side check valve (CXFAXAN/AP)

    528.00

    Free-flow, nose-to-side check valves are on/off circuit components that allow free flow from the inlet (port 1) to the outlet (port 2) and block flow in the opposite direction.

    • Two-port check valves share the same cavity for a given frame size, however, pay close attention as flow paths may be in opposite directions.
    • Check valves offer extremely low leakage rates with a maximum leakage of less than 1 drop per minute (0,07 cc/min).
    • Will accept 5000 psi (350 bar) at ports 1 and 2.
    • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • SUN HYDRAULICS Free flow nose to side check valve(CXFAXCN/AP)

    528.00

    Free-flow, nose-to-side check valves are on/off circuit components that allow free flow from the inlet (port 1) to the outlet (port 2) and block flow in the opposite direction.

    • Two-port check valves share the same cavity for a given frame size, however, pay close attention as flow paths may be in opposite directions.
    • Check valves offer extremely low leakage rates with a maximum leakage of less than 1 drop per minute (0,07 cc/min).
    • Will accept 5000 psi (350 bar) at ports 1 and 2.
    • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • SUN HYDRAULICS Free flow nose to side check valve(CXHAXEN)

    302.40

    Free-flow, nose-to-side check valves are on/off circuit components that allow free flow from the inlet (port 1) to the outlet (port 2) and block flow in the opposite direction.

    • Two-port check valves share the same cavity for a given frame size, however, pay close attention as flow paths may be in opposite directions.
    • Check valves offer extremely low leakage rates with a maximum leakage of less than 1 drop per minute (0,07 cc/min).
    • Will accept 5000 psi (350 bar) at ports 1 and 2.
    • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • SUN HYDRAULICS Free flow side to nose check valve (CXCDXCV)

    120.00

    Free-flow, side-to-nose check valves are on/off circuit components that allow free flow from the inlet (port 2) to the outlet (port 1) and block flow in the opposite direction.

    • Two-port check valves share the same cavity for a given frame size, however, pay close attention as flow paths may be in opposite directions.
    • These check valves are considered circuit savers for existing circuits where manifold drillings are incorrect. The capacity of side-to-nose (port 2 to port 1) 2-port check valves is approximately 30% less than preferred models with a nose-to-side (port 1 to port 2) flow path.
    • Check valves offer extremely low leakage rates with a maximum leakage of less than 1 drop per minute (0,07 cc/min).
    • Will accept 5000 psi (350 bar) at ports 1 and 2.
  • SUN HYDRAULICS Pilot-operated, balanced piston relief valve (RPGCLBN)

    336.00

    Free-flow, nose-to-side check valves are on/off circuit components that allow free flow from the inlet (port 1) to the outlet (port 2) and block flow in the opposite direction.

    • Two-port check valves share the same cavity for a given frame size, however, pay close attention as flow paths may be in opposite directions.
    • Check valves offer extremely low leakage rates with a maximum leakage of less than 1 drop per minute (0,07 cc/min).
    • Will accept 5000 psi (350 bar) at ports 1 and 2.
    • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • SUN HYDRAULICS Pilot-to-close check valve (CODAXAN)

    199.20

    This valve is a spring biased closed, pilot-to-close check cartridge that has a 1.8:1 pilot ratio. The valve allows flow from port 1 to port 2 and blocks reverse flow. Pressure at the pilot port opposes pressure at port 1 at a ratio of 1.8:1. This valve is most often used in regeneration circuits.

    • Minimum clearances between the spool and sleeve and a seal on the pilot piston diameter significantly reduce the potential for silting.
    • Nominal pilot ratio is 1.8:1. This means that a pressure of 1000 psi (70 bar) at the pilot port will close a valve against a pressure of 1800 psi (125 bar) at port 1. Any decay or loss of pilot pressure could allow the valve to open, even if it is a momentary decay or loss.
    • Pressure at the port 2 area directly opposes pilot pressure.
    • Reverse flow through the valve from port 2 to port 1 is not possible under any condition.
    • With equal pressures at all ports the valve is closed.
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