What is function of Oil reservoir,Pressure relief valve, Direction control valve and filters in Hydraulic system.

What is function of Oil reservoir,Pressure relief valve,  Direction control valve and filters in Hydraulic system.
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Answer :

(i) Oil Reservoir – To store the Hydraulic oil for the circuit (ii) Pressure Relief Valve- To release the extra pressure whenever not required by system (iii) Direction Control Valve- To give the direction to the actuator (iv) Filters- To filter the foreign particle from the oil and to separates submicron level contamination
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