Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components

some illustrative numerical problems

Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

SOME ILLUSTRATIVE NUMERICAL PROBLEMS: Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

SOME ILLUSTRATIVE NUMERICAL PROBLEMS

On Pressure Control Valve

Example 6.1 

A pressure relief valve has a pressure setting of 100 bars. Calculate the kW power loss across this valve if it returns all the flow back to the tank from a 1.39 Lps pump.

Given Data: 

P = 100 bar = 100 × 102 kPa ; Q = 1.39 Lps = 1.39 × 10-3 m3/s. 

Solution: We know that the kW power loss across the pressure relief valve, 

kW power loss = P.Q

= (100 × 102) (1.39 × 10−3) = 13.9 kW Ans.

On Flow Control Valve

Example 6.2 

Determine the flow rate through a flow control valve that has a capacity coefficient 3 Lpm/√ kPa and a pressure drop of 720 kPa. The fluid is hydraulic oil with a specific gravity of 0.90.

Given Data: 

C, = 3 Lpm/√ kPa ; ∆P = 720 kPa; Sg = 0.90.

Solution: 

We know that the flow rate through a flow control valve,


The term capacity coefficient may be defined as the flow rate of water in Lpm that will flow through the valve at a pressure drop of 1 kPa.

Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components : Tag: : Hydraulic Actuators and Control Components - Hydraulics and Pneumatics - some illustrative numerical problems


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Hydraulics and Pneumatics

ME3492 4th semester Mechanical Dept | 2021 Regulation | 4th Semester Mechanical Dept 2021 Regulation