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E-COFA Pilot-to-close check valve

Item No.: E-COFA
This valve is a spring biased closed, pilot-to-close check cartridge that has a 1.8:1 pilot ratio. SUN Hydraulics COFA equivalent.
Description Review
Description

SYMBOL

 

OPERATION
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.

FEATURES

* 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.

 

SPECIFICATIONS:

Operating Pressure: 350 bar (5000 psi)

Flow: 160 lpm (40 gpm)
Pilot Ratio: 1.8: 1

Maximum Valve Leakage at 110 SUS (24 cSt): 0.07 ml/min (1 drops/min) max. at operating pressure

Temperature: - 40°C ~ +120 °C  
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 SUS). 

Cavity: T-2A

Flow Model Cavity Installation Torque
40 L/min E-COBA-XCN T-163A 35/40 Nm
80 L/min E-CODA-XCN T-11A 40/50 Nm
160 L/min E-COFA-XCN T-2A 60/70 Nm
320 L/min E-COHA-XCN T-17A 200/215 Nm
640 L/min E-COJA-XCN T-19A 465/500 Nm

     

PERFORMANCE:

 

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 in Ningbo China since 2009.

We guarantee quality for 3 years for non-standard customized valves: No leakage, No Noise, No Vibration.

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