Vickers | 4SK140-3-S-3
4SK140-3-S-3
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The 4SK140-3-S-3 check valve is produced by Vickers in the Check Valves series and supports hydraulic automation by ensuring controlled one-way flow. This screw-in cartridge design fits a T-17A cavity, simplifying manifold assembly. A poppet element provides positive sealing while allowing a rated flow of 140 L/min in the forward direction. The valve withstands system pressures up to 350 bar and limits reverse leakage to 0.25 cc/min. A pilot ratio of 3:1 supports external pilot opening when backpressure is present. Buna-N seals maintain fluid integrity with common petroleum-based fluids.
The body provides three housing ports that align with three internal ports for inlet, outlet, and pilot connections. Overall length is 91.948 mm and width is 44.450 mm, dimensions suited to standard manifold footprints. The cylindrical geometry permits rapid replacement during maintenance without disturbing adjacent components. Reliable performance is maintained from −30 °C up to 90 °C, covering common mobile and industrial environments. System cleanliness should meet an ISO 18/13 filtration level to protect the sealing surfaces from contamination. These physical and environmental parameters guide proper installation and long-term service in automated hydraulic systems.
Technical Specifications
Cavity
T-17A
Housing Ports
3
Installation Type
Screw-In Cartridge
Leakage
0.25 cc/min
Max Operating Pressure
350 bar
Max Operating Temperature
90 C
Min Operating Temperature
-30 C
Pilot Ratio
3:1
Product Length
91.948 mm
Product Width
44.450 mm
Rated Flow
140 L/min
Recommended Filtration Level
18/13
Seal Type
Buna-N
Valve Ports
3
Valve Style
Poppet
1620 Old Apex Road
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