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SUN HYDRAULICS
CHECK CARTRIDGE
CKGHSCN

  • SUN HYDRAULICS
  • Material:CKGHSCN
  • Model:CKGH-SCN
  • Summary:Cartridge

Due to extremely high demand, please call 800-289-1330 for availability

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics CKGHSCN (CKGHSCN) is a pilot-to-open check valve designed for hydraulic applications that require hose break protection, prevention of load drifting, and positive locking of pressurized loads. This valve enables free flow from valve port 2 to load port 1 and blocks flow in the opposite direction. Its operation involves pressure at the external pilot port opening the valve from port 1 to port 2, with the pilot pressure required being directly proportional to the load pressure at port 1. Notably, this valve is insensitive to pressure at port 2 due to its spring chamber referencing the vent port 3. The CKGHSCN features a non-sealed pilot with a steel seat and is vented, which allows for air trapped in the pilot line to be purged from the circuit. It offers extremely low leakage rates; however, if leakage occurs due to load drifts, it typically indicates seat damage from contamination, necessitating valve replacement. The valve's design incorporates Sun's floating style construction which minimizes internal parts binding caused by excessive installation torque or cavity/cartridge machining variations. This model has a maximum operating pressure of 5000 psi (350 bar) and can handle up to 60 gpm (240 L/min). It also exhibits a proportional pressure-reducing characteristic that limits the pressure at port 1 to about 75% of that at port 2 under certain conditions. The CKGHSCN is equipped with Viton seals and has specific installation requirements including a torque range of 150-160 lbf ft (203-217 Nm). It should be noted that this specific model is not interchangeable with other three-port pilot-to-open check valves or counterbalance valves due to its unique pilot-vent configuration.

This valve is a pilot to open check valve. It has a non-sealed pilot, a steel seat, and is 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 external pilot port will open the valve from port 1 to port 2. Pilot pressure needed to open the valve is directly proportional to the load pressure at port 1. The valve is insensitive to pressure at port 2 because the spring chamber references the vent (port 3).

  • There is a positve seal between ports 2 and 3.
  • These valves should be considered service items only. New applications should use valves from the CV*V family.
  • This valve has a proportional pressure reducing characteristic that limits the pressure developed at port 1 to about 75% of the pressure at port 2.
  • Pilot pressure as low as 15 psi (1 bar) higher than the pressure at the vent can prevent the valve from closing.
  • Provides hose break protection, prevents loads from drifting and positively locks pressurized loads.
  • Standard unsealed pilot allows air trapped in the pilot line to be purged from the circuit.
  • Pilot-to-open check cartridges are locking valves, not motion control valves. For motion control applications, use counterbalance valves.
  • Extremely low leakage. If the load drifts due to the valve, the seat has probably been damaged by contamination and the valve should be replaced.
  • This 3 port pilot-to-open check valve is not physically interchangeable with other 3 port pilot-to-open check valves or counterbalance valves due to the different pilot/vent configuration.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

Cavity T-17A
Series 3
Capacity 60 gpm240 L/min.
Pilot Ratio 3:13:1
Maximum Operating Pressure 5000 psi350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 1 drops/min.0,07 cc/min.
Valve Hex Size 1 1/4 in.31,8 mm
Valve Installation Torque 150 - 160 lbf ft203 - 217 Nm
Model Weight 1.10 lb0,50 kg
Seal kit - Cartridge Viton: 990-017-006

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