Spare Parts

Sl.No. Description Qty.
* 1 O' Ring 1
2 Spring 1
3 Socket Head Plug 1
* 4 O' Ring 2
5 Backup Ring 4
* 6 O' Ring 2
7 Main Poppet 1
8 Bush 1
9 Spring Pad 1
10 Spring 1
* 11 O' Ring (Nitrile) 1
12 Adjusting Screw 1
13 Top Nut 1
14 Check Nut 1
15 Circlip External 1
16 S.H.Cap Screw 4
Sl.No. Description Qty.
17 Check Poppet 1
18 Check Body 1
19 Stem 1
20 Main body 1
21 Plug 1
22 Bonded Seal 1
23 Socket Head Plug 1
* 24 O' Ring 1
25 Backup Ring 1
* 26 O' Ring (Nitrile) 1
27 Ring 1
* 28 O' Ring (Nitrile) 1
29 Cover 1
30 Socket Head Screw 4
31 Cap  

Note : * Recommended Spares
While ordering the spares give complete details of Model Code punched on the valve body.


Maintenance Manual


Operation and Maintenance Instruction :

Counter Balance valve require very little attention from the user provided the valve is operated within the specified conditions. However following guide lines be followed while storage, operation, commissioning and maintenance.

Storage :

For storage see that the valve is properly covered and well lubricated. This will prevent the ingress of dust and dirt in working mechanism of the valve and it will be easy to install the same.

Operation :

Counter Balancing is required when ever gravity can move the load faster than the speed intended by the hydraulic system. Counter Balance valves are seat type valves. They offer free flow from port B to A via check valve and give leak free closure in opposite direction upto a pre-set pressure. When the pressure at port A rises slightly above the set pressure, the relief valve poppet opens against the set spring force, thus allowing flow from port A to B. The valve may either be internally drained or externally drained.

Commissioning :

Following points be remembered while commissioning the valve;

Inlet line is connected to port A where as port B forms the outlet. Port X forms the external drain port. See that correct size couplings and seals are used.

Maintenance :

Counter Balance valve does not need any major attention, but to ensure its efficient working and long life it is necessary that following points be kept in mind.

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

The oil must be periodically changed. Use of contaminated oil may lead to the formation of dents on the check valve poppet and the relief poppet leading to excessive leakage non development of pressure.

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


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Subject to revision.

Regd. office & Works :
78-80, Machhe Industrial Estate, Machhe, Belgaum - 590 014. Karnataka, INDIA. 
Phone :
+91-0831-2411001.  Fax : +91-0831-2411002 ,  
E-mail : ,  Website :


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Polyhydron Pvt. Ltd, Belgaum, India.

Updated on February 04, 2015 03:05 pm .