2CI – Double Pilot Operated Check Valve
The Polyhydron 2CI Series refers to a line of Double Pilot Operated Check Valves designed to provide pressure holding for hydraulic actuators (typically cylinders) in both directions.
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Check Valve – C (ISO)
The Polyhydron Check Valve – C (ISO) is a high-pressure, seat-type hydraulic valve designed for unidirectional flow control. Conforming to the ISO 5781 standard, it is primarily used in industrial hydraulic circuits to ensure fluid moves in one direction while preventing leakage or backflow in the reverse.
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Check Valve – C
The Polyhydron Check Valve C is a simple, high-pressure non-return valve that acts as a one-way street for hydraulic oil. It uses a spring-loaded “seat-type” design to ensure a tight, leak-free seal when flow tries to go the wrong way.
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CI – Internal Drain Pilot Operated Check Valve
The Polyhydron Internal Drain Pilot Operated Check Valve – CI series is a seat-type hydraulic valve designed for high-pressure systems up to 315 bar. It allows unrestricted free flow from port A to port B and provides a leak-free seal in the reverse direction. To allow flow from B to A, a pilot pressure must be applied to the “X” port.
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CI06 – Internal Drain Pilot Operated Check Valve
The Polyhydron Internal Drain Pilot Operated Check Valve – CI06 is a high-pressure, seat-type hydraulic valve designed to provide leak-free closure in one direction while allowing free flow in the other. It is widely used for load-holding applications, such as locking hydraulic cylinders in position to prevent creeping or accidental dropping.
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CIM06 – Double Pilot Operated Check Valve (Modular)
The Polyhydron Double Pilot Operated Check Valve (Modular) – CIM06 series refers to modular pilot-operated check valves designed for vertical stacking in hydraulic assemblies. While the standard base model is the CIM06, the “Double” version is specifically designated as the CIM06 AB.
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CIM10 – Double Pilot operated check valve (Modular)
The Polyhydron Double Pilot operated check valve (Modular) – CIM10Â is a modular pilot-operated check valve designed to provide leak-free pressure holding in hydraulic systems. Its “modular” construction allows it to be stacked vertically in a valve manifold (sandwich mounting), which eliminates the need for extra piping.
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CL – External Drain Pilot Operated Check Valve
The Polyhydron External Drain Pilot Operated Check Valve Model CL is a seat-type, pilot-operated check valve specifically designed with an external drain facility [5.5, 5.33]. It allows free flow from Port A to Port B while providing a leak-free seal in the opposite direction (B to A) [5.9].
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Prefill Valve (PV 100 to PV200 ) – 21 Series
The Polyhydron PV 100 to PV 200 (21 Series) is a hydraulic-pilot operated, seat-type check valve designed for prefilling and exhausting large hydraulic cylinders. These valves allow rapid movement in hydraulic presses by permitting high-volume oil flow from the tank to the cylinder and vice versa.
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Prefill Valve (PV32 to PV80 )
Polyhydron’s PV Series (PV32 to PV80) prefill and exhaust valves are pilot-operated check valves designed for rapid filling and exhausting of large hydraulic cylinders, common in press applications. They feature a poppet-type construction that allows free flow from Port A to Port B and requires pilot pressure at Port X for flow from Port B to Port A.
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Shuttle Valve – SL06
The Polyhydron Shuttle Valve (Model SL06) is a seat-type hydraulic valve designed to automatically select the higher of two pressure sources. It functions as a hydraulic “OR” gate, connecting its output port (P) to whichever input port (A or B) has the higher pressure while isolating the lower-pressure port.
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