Class 2 (2nd Engineer) MEKG 📅 Sep 2024

Exam Question

(a) Sketch and describe a valve suitable for reducing air pressure and maintaining the reduced pressure within close limits. (8)

(b) Describe the processes through which air from the starting air receivers should be treated before it is used in a pneumatic control system (8)

Reference Answer

### (a) Pressure Reducing Valve
A pressure reducing valve is a self-acting control valve designed to automatically reduce a higher, often fluctuating, inlet pressure to a constant, lower outlet pressure, irrespective of variations in upstream pressure or downstream flow demand.
#### Construction
A typical direct-acting pressure reducing valve consists of the following key components:

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