Vickers | C5G825S8
C5G825S8
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The C5G825S8 check valve is manufactured by Vickers and belongs to the Check Valves series. It permits free flow in one direction and prevents reverse flow in hydraulic automation circuits. The valve begins to open at a crack pressure of 5.2 bar (75 psi), allowing controlled line priming without abrupt surges. A maximum operating pressure rating of 210 bar (3000 psi) defines the upstream limit before structural stress would rise beyond design margins. The nominal flow capacity is 400 l/min (100 US gpm), so the unit suits medium to high flow power units. The port size is 1-1/4 in, matching common pipe work in industrial manifolds. Secure installation is supported by mounting bolts tightened to 95 Nm (70 lbf ft) into a .750-10 UNC-2B threaded pattern.
The mounting interface employs four holes, each machined to a diameter of 19.84 mm (0.781 in) to accommodate the specified fasteners. Required pad flatness of 0.013 mm (0.0005 in) prevents distortion of the body under bolt load, while a surface finish of 1.6 µm (63 µin) ensures proper sealing with the gasket or O-ring groove. Overall dimensions measure 127.0 mm (5.000 in) in length, 127.0 mm (5.000 in) in width, and 109.982 mm (4.330 in) in height, offering a compact cube-like form that fits standard subplates. These geometric constraints guide manifold design and clearance planning during equipment assembly. Maintaining these tolerances helps prevent preload loss and leakage when the assembly is exposed to vibration and thermal cycling.
Technical Specifications
Crack Pressure
5.2 bar (75 psi)
Max Mounting Bolt Torque
95 Nm (70 lbf ft)
Maximum Operating Pressure
210 bar (3000 psi)
Mounting Bolt Thread
.750-10 UNC-2B
Mounting Hole Diameter
19.84 mm (0.781 in)
Mounting Holes
4
Mounting Pad Flatness
0.013 mm (0.0005 in)
Mounting Surface Finish
1.6 µm (63 µin)
Nominal Flow Capacity
400 l/min (100 US gpm)
Overall Height
109.982 mm (4.330 in)
Overall Length
127.0 mm (5.000 in)
Overall Width
127.0 mm (5.000 in)
Port Size
1-1/4 in
1620 Old Apex Road
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