SUN Hydraulics CKGI-VCN Vented Pilot-To-Open Check Valve Sealed Pilot 2 Bar Cracking Pressure

SUN Hydraulics CKGI-VCN Vented Pilot-To-Open Check Valve Sealed Pilot 2 Bar Cracking Pressure

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SUN Hydraulics CKGI-VCN
Vented Pilot-To-Open Check Valve


Sun Hydraulics has established a strong foundation for consistently delivering exceptional performance in all aspects of their business. From product design and service delivery, Sun Hydraulics stands out in the industry.

Since the beginning, Sun products have been setting the standard for the screw-in hydraulic cartridge valve industry. Sun's floating cartridge construction and cavity design approach allows products to operate precisely and reliably at higher pressures and flow rates in the most demanding applications. The generous porting area, coupled with our manifold design and construction techniques, result in integrated packages that can be up to 50% smaller than competitive offerings.

Sun cartridge valves are offered in five primary sizes, with flow capacity and controlled horsepower doubling with each successive size. Within each broad functional area (pressure, flow, load control, etc.), multiple variations are available to help you optimize your control circuit, from individual valves to complete integrated packages. Their expansive product line allows you to develop the best control solution for your hydraulic application.

Sun Hydraulics' pilot-to-open check cartridges are non-modulating, on-off devices used for holding a load or actuator in position. Sun pilot-to-open check cartridges can be directly integrated into your actuator or applied using manifolds with many mounting options.

  • Offer protection against hose breaks
  • Positively lock pressurized loads
  • Are available in non-vented (3-port) and vented (3- and 4-port) versions
  • Are physically interchangeable with counterbalance cartridges (same number of ports, same cavities, same flow path for a given frame size).


Technical Specification

Control - External 1/4 NPTF, Pilot Port, Vent to Port 3
Cracking Pressure - 30 PSI With 2 Bar
Seal Material - Buna-N

Cavity T-17A
Series 3
Capacity 60 gpm
Maximum Operating Pressure 5000 psi
Pilot Ratio 3:1
Maximum Valve Leakage at 110 SUS (24 cSt) 1 drops/min.
Valve Hex Size 1 1/4 in.
Valve Installation Torque 150 - 160 lbf ft
Model Weight 0.59 Kg
Seal kit - Cartridge Buna: 990017007
Seal kit - Cartridge Polyurethane: 990017002
Seal kit - Cartridge Viton: 990017006
*Note: Data may vary by configuration.

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The purchaser of these items must ensure that they are satisfactory for use in the application for which they are intended.
No responsibility can be accepted if any products are incorrectly or inadequately fitted.
Goods may not be exact to image shown.