Polyhydron Products

Product Details:

• Rotary directional control valve are hand lever operated valves designed for applications where,
• Pressures are high
• Internal leakages in the valve need to be negligible and,
• Flow handled are very small. 
• These valves are available with open or dosed crossover condition while in operation. 
• Three mounting styles are designed to suit specific customer needs. 

Product Details:

• Designed for single acting cylinders which are supposed to hold pressure. 
• Ensures smooth decompression prior to return of the cylinder ram. 
• Large return oil passage to reduce pressure drops, allowing rams to return under low external forces. 
• Valves can be connected in series for independent multiple single acting cylinder operations. 

Product Details:

• Direct solenoid operated.spool type. mounting on ISO 4401-03-02.
•  Five chamber body and spool design provides low-pressure drop, with maximum performance.
• Balanced spool design ensures proper shifting force for maximum reliability and long life. 
• All spools and bodies are interchangable, simplifying maintenance. 
• Wet pin DC solenoids ensure better heat dissipation, quieter operation, there by increasing solenoid life. 
• Moulded solenoid coils eliminate moisture problems and ingress of dust. Plug-in-coils for ease of maintenance. Indicator lights are a standard feature. 

Product Details:

• Completely encapsulated mechanism for protection against dirt. Five chamber design for better reduction in dynamic forces and longer valve life. Available as spring centred, spring off-set or detented model. Operating head can be rotated by 90° x 4 around spool axis for flexibility in mounting. Valve mounting interface conforms to ISO 4401-03-02. Five chamber body and spool design provides low-pressure drop, with maximum performance. Balanced spool design ensures proper shifting force for maximum reliability and long life.All spools and bodies are interchangable, simplifying maintenance. 

Product Details:

• Solenoid operated cartridge type directional control valve Sliding spool construction.
• Wet pin solenoids ensure better heat dissipation, quieter operation, there by increasing solenoid life.
• Moulded solenoid coils eliminate moisture problems and ingress of dust.
• Plug-in-coils for ease of maintenance. Indicator lights are a standard feature. 

Product Details:

• Available as spring centered, spring offset.
• Valve mounting interface conforms to International and National standards. 

Product Details:

• Completely encapsulated mechanism for protection against dirt. Five chamber design for better reduction in dynamic forces and longer valve life. Mounting styles — Subplate body. Available as spring centred, spring off-set or detented model. Operating head can be rotated by 90° x 4 around spool axis for flexibility in mounting. Valve mounting interface conforms to International and National Standards. Port configuration conforms to Factory Standards. 

Product Details:

• Completely encapsulated mechanism for protection against dirt. Available as spring centred, spring offset or detented model. Internal or external drain available as an optional feature. Valve mounting interface conforms to International and National standards. 

Product Details:

• 4-port, spool type, directional control valves with hand lever actuation and wide variety of spool types with spring-centered, spring-offset and de-tent arrangements. 

• Five chamber body and spool design to facilitate high flow. 
• Conforms to 1504401-03, NFPA T3.5.1 and ANSI 893-7 D03 interface. 
• Available in 52 standard, interchangeable spool configurations.
• New fully encapsulated hand-lever mechanism for protection against ingress of dirt. High flexibility in mounting and operation - The operating head can be Rotated 4 x 90° around the spool axis The operator head can be relocated towards port b of the valve. - Hand Lever can be rotated so that it is parallel to the axis at neutral condition. 
• Special R-rings for high extrusion resistance. Increased stability under high dynamic condition. 

Product Details:

• Available as spring centered, spring offset Valve mounting interface conforms to International and National standards. 

Product Details:

• Completely encapsulated mechanism for protection against dirt.
• Available as spring centred, spring offset
• Valve mounting interface conforms to International and National standards. 

Product Details:

Product Details:

Product Details:

• Sub-Plate mounting Style Return Line Filter 
• Paper Eliment Filteration media
• Spin on Disposable Canisters

Product Details:

• Prefill and Exhaust valves model PV" are seat type check valves, allowing free flow from its port A to port B and leak-free closure in opposite direction. For reverse flow, these valves can be opened by applying pilot pressure to its port X. 
• The valves are designed for the purpose of pre-filling large cylinders during their rapid approach motions, which are actuated mean like a pair of kicker cylinders or jack up cylinders or by gravitational force. 
• These valves have very low cracking pressure and generous internal passage to help them to offer least possible pressure drop while pre-filling. 
• Due to low pressure drop, these valves also can handle much higher exhaust flow enabling rapid return of the cylinders. 
• For connectivity, it's A port is machined as per Port dimensions for Flanged connection ISO 6162. 
• The special cavity for the B port helps the user to mount these valves directly on the cylinders, thus further reducing the pressure drop in the line. 
• A hydraulic system having Prefill valve without decompression feature, must have an external arrangement of decompressing the oil in the cylinder, before the valve is opened. 

Product Details:

• Seat type construction.
• Allows free flow from it's port A to port B.
• Flow from port B to port A can be had by applying pilot pressure to it's port X.
• The decompression feature enables the valve to open in two stages progressively, allowing smooth and rapid exhaust of the compressed oil.
• Opening and closing time of the valve can be influenced by providing Throttle - Check Valves in the X port line.
• Flanged port A of the valve housing can be rotated around vertical axis through 360°. 

Product Details:

• Seat type modular valve. 
• Intended for by - passing Pressure control valve, Pressure reducing valve etc. to achieve reverse free flow condition. 
• Allow free flow from port A to port B or from port B to port A ( see model code ) and offer leakage free closure in opposite direction. 
• Available in four sizes of standard interfaces conforming to ISO 5781, DIN 24340 or IS 10187 Each model available with options. 

Product Details:

• Pilot operated Check valves model CL allow free flow in the direction from Port A to Port B and offer leakage free closure in opposite direction. Reverse flow can be achieved by applying pilot pressure to their Port X. These valves are meant for applications where the reverse flow (from Port B to Port A) encounters resistance downstream of the Port A. The intensity of pilot pressure required to keep the valve open during reverse flow depends upon the valve model, pressure at Port A and pressure existing at the Port B when the reverse flow starts. Pilot pressure can be calculated using formulae given below. 
• In most cases, smooth decompression and opening of the valve for flow from Port B to Port A can be effectively achieved by controlling pressure and flow to the Pilot Port X. However, in certain cases it is necessary to decompress the oil in the cylinder first before admitting the oil in the cylinder for the return stroke for smooth reversal. 

Product Details:

• Modular pilot operated check valves series amoek provide pressure holding facility on their service ports Al and Bl. 
• These valves are also available with pilot check facility on either A or B port. The valve opens and allows free return flow, when the other working port is pressurized. 
• The valve is not suitable for holding pressure on rod end side of Double acting cylinders, where area ratio ( Bore area : Annulus area ) is equal to or greater than 2.6. 
• The modular construction facilitates use of these valves in a vertical stack, eliminating need of piping. 

Product Details:

• Modular pilot operated check valves series CIM10tir provide pressure holding facility on their service ports Al and B1. 
• These valves are also available with pilot check facility on either A or B port. The valve opens and allows free return flow, when the other working port is pressurized. 
• The valve is not suitable for holding pressure on rod end side of Double acting cylinders, where area ratio ( Bore area : Annulus area ) is equal to or greater than 3.5. 
• The modular construction facilitates use of these valves in a vertical stack, eliminating need of piping. 
• The interface confirming to ISO-AC-05-4-A, IS 10187, DIN 24340. 

Product Details:

• Designed for operating single acting up-stroking cylinders, which are expected to hold pressure during their working cycle. The valve also ensure smooth decompression prior to return of the cylinder. 
• Large return oil passage in the valve helps to return of the cylinder rapidly. 
• Opertions of multiple independent single acting cylinders can be achived by using the valves connected in series. ( Please refer circuit on last page.) 
• The valves can be supplied with features for mounting Pressure Regulator valve and Pressure Switch to eliminate interconnecting pipes. 

Product Details:

• Pressure compensated flow control in the direction of flow from port A to B.
• Check valve option for reverse free flow. 
• Seven rotations of hand knob over the controlling range to facilitate setting with ease. 
• Stroke limiter option available for surge free start at any flow setting. 

Product Details:

• Throttle check valves model TCM 06 are meant for controlling flow in one direction in circuit by simple throttling of flow. 
• Reverse flow is free and is independent of throttle condition in opposite direction in same path. the valve is available with throttle check valve facility on either A port, B port or A and B ports.
• These are non-pressure compensated flow control valves and therefore offer constant flow for a given setting, only if the pressure drop across the throttled passage is constant
• The valve can be converted from meter-in condition to meter-out condition by simply rotating the body along its longitudinal axis by 180 degree, while being installed. Rotation of the throttling screw in clockwise direction, increase the pressure drop in the path. 
• For locking the setting, a check nut is provided For proction of the setting, a protective cap is provided 

Product Details:

• Flow divider valves provide dual flow from a single source at a predetermined ratio, regardless of load. 
• Maximum dividing error is < ±5% Threaded port body. 

Product Details:

• Throttle check valves model TCM 10 are meant for controlling flow in one direction in circuit by simple throttling of flow. Reverse flow is free and is independent of throttle condition in opposite direction in same path. The valve is available with throttle check valve facility on either A port, B port or A and B ports.
• These are non-pressure compensated flow control valves and therefore offer constant flow for a given setting, only if the pressure drop across the throttled passage is constant.
• The valve can be converted from meter-in condition to meter-out condition by simply rotating the body along its longitudinal axis by 180 degree, while being installed.
• Rotation of the throttling screw in clockwise direction, increase the pressure drop in the path. For locking the setting, a check nut is provided For proction of the setting, a protective cap is provided 

Product Details:

• The Prefill Exhaust Valve (PV) is a hydraulic-pilot operated check valve with seat type construction. It allows free flow from port A to port B. Flow from port B to port A can be enabled by applying pilot pressure to it's port X.
• The decompression feature enables the valve to open in two stages progressively, allowing smooth and rapid exhaust of the compressed oil. Opening and closing time of the valve can be influenced by providing Throttle-Check Valves in the X port line. 
• Flanged port A of the valve housing can be rotated around verti-cal axis through 360° to facilitate access to flange fixing bolts and flange orientation 

Product Details:

• The cartridge valves with model CV are used to control oil pressure flow rate or direction and are designed for insertion into cavities machined as per ISO 7368. These cartridges are available in two area ratios , four cracking pressures and seven poppet styles. The covers are available for different functions like directional control, pressure control, unloading, flow control etc. 

Product Details:

• The covers CVC X are designed to hold polyhydron make Cartridge valves model CV" in cavities machined as per ISO 7368, and to provide oil passage to their control port C via X port provided on the cover to control the opening and closing operation of the cartridge valve. 
• The passage has an orifice screwed into it, for influencing the rate of opening and closing of the poppet of the cartridge valve, there by reducing / eliminating shocks in the main circuit oil flow. The threaded port on the cover can also be used for diagnostic purpose or for parallel supply of oil to some other function. This is particularly useful for the onsite modifications to the circuit. 

Product Details:

Product Details:

• Non Adjustable Differential Type
• Spring Loaded Sealed Piston Construction. Encapsulated Design for Protection Against Dust
• Six Pressure Ranges Available Which Can Be Adjjstable upto 10,50,100,200,350 and 420 bar
• Transparent Plug-in Connector is Available with LED

Product Details:

• These Bar Manifolds are designed to connect valves having interface conforming to ISO 4401-03-02 in parallel in least possible physical space. 
• These Manifolds connect all P ports of the interface to a common passage generously sized for least possible pressure drop. So also the T ports. 
• The maximum number of interfaces available on manifold bar are 10. 

Product Details:

• Seat type construction. 
• Automatically connects its P port to either A or B depending upon whichever of two ports is at higher pressure level. 
• Isolates port A and port B from each other. 
• Port P can be connected to tank only if port A and port B are connected to tank. 

Product Details:

• Check valve models C allow free flow in the direction from Port A to Port B and offer leak free closure in opposite direction. 

• Line mounting C X T. 
• Subplate mounting C X S. 

Product Details:

• Seat type modular valve. 
• Intended for by - passing Pressure control valve, Pressure reducing valve etc. to achieve reverse free flow condition. 
• Allow free flow from port A to port B or from port B to port A ( see model code ) and offer leakage free closure in opposite direction.
•  Available in four sizes of standard interfaces conforming to ISO 5781, DIN 24340 or IS 10187 Each model available with options. 

Product Details:

Product Details:

• Double pilot operated check valves series 2C110T provide pressure holding facility on service ports Al and Bl. 
• The valve opens and allows free return flow, when the other working port is pressurized. 
• The valve is not suitable for holding pressure on rod end side of Double acting cylinders , where ratio ( Bore area : Annullus area ) is equal to or greater than 3.5. 

Product Details:

• These Bar Manifolds are designed to connect valves having interface conforming to ISO 4401-05-04 in parallel in least possible physical space. 
• These Manifolds connect all P ports of the interface to a common passage generously sized for least possible pressure drop. So also the T ports. 
• The maximum number of interfaces available on manifold bar are 07. 

Product Details:

• The Covers CVC*R are designed to hold Polyhydron make 2 port slip-in cartridge valves model CV" in the cavities machined as per ISO 7368, and are meant to create a pilot operated relief function, when combined with a valve having a poppet area ratio of 1:1. 
• The covers have options of having pressure adjustment facility by means of Set screw or a Hand knob. Clockwise rotation of the screw increases the pressure setting. 
• These covers are also available with an optional facility to mount on them, a Solenoid operated Directional Control Valve to give the combination an added feature of unloading a pump or regulating pressure and exhausting a cylinder side by means of an electrical signal to the Solenoid. 

Product Details:

Product Details:

• The Covers CVC 2RS are designed to hold Polyhydron make 2 port slip-in cartridge valves model CV*** in the cavities machined as per ISO 7368, and are meant to provide duel pressure Pilot operated Relief function, using combination of a Slip-in Cartridge having a poppet ratio of 1:1, and two Relief valves, selectable by means of energizing a solenoid valve mounted on it. 
• Please note that difference in the pressure setting between the 1st Relief valve and the 2nd Relief valve (as marked in the circuits below) must be minimum 10 bar; 2nd Relief valve being set at lesser pressure of the two. 
• By using a Double solenoid valve as shown in the circuit, an additional unloading function can also be achieved by the cover.