Spare Parts

Maintenance Manual

MODEL : TCM (Size 06)

Operation and Maintenance Instructions :

Polyhydron make Throttle cum check valves are reliable hence require very little attention from user. However it is necessary that following points must be kept in mind while storage, operation, commissioning and maintenance.

Storage :

During storage take care that this valve is properly covered and well lubricated. This will prevent ingress of dust and dirt in working mechanism and during commissioning it will be easy to install the same.

Operation :

The Throttle cum Check Valves are available with dual flow controls with reverse free flow checks for sandwich mounting between directional control and it’s subplate.

These valves are non-pressure compensated.

The pressure supply and the tank return from the directional valve are allowed to pass through the valve unrestricted. The flow control is achieved when the poppet’s position is adjusted laterally to cause a partial blockage of the ‘A’ and ‘B’ actuator lines. The poppet which controls the flow in one direction also serves as the reverse free flow check in the opposite direction of flow.

Commissioning :

During commissioning, the Throttle cum Check Valve does not need any special attention. But following points are to be kept in mind:

While commissioning the valve care should be taken that the valve is mounted according to the symbol at the adjusting screw end to achieve the required function.

See whether the proper O' rings are used or not.

Cap screws and the corresponding tightening torque should be as mentioned in the data sheet.

Maintenance :

The Throttle cum check valve does not need any major attention, but to ensure its efficient working and long life of the valve it is necessary that the following points kept in mind:

The oil must be of prime quality and clean as per ISO code 16/13.

Care should be taken that the oil should be periodically changed. The use of Contaminated oil may cause wear of the spool which leads to leakage.

The O' rings at the port openings must be checked periodically.

The oil temperature must be within the specified range i.e. -20 C to +70 C.


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Updated on February 04, 2015 03:05 pm .