Exam Question
(a) Sketch an auxiliary boiler 'blow down' valve. Explain how it differs from its shipside counterpart. (10)
(b) Describe the sequence of 'blow down' procedure. (6)
Class 4 (4th Engineer)
MEKG
📅 Aug 2025
Reference Answer
### (a) Auxiliary Boiler 'Blow Down' Valve & Comparison
#### 1. Sketch and Description of a Boiler Blow Down Valve
A typical boiler blowdown valve is a **Parallel Slide Gate Valve**. This design is specifically chosen for its ability to handle the harsh conditions of boiler blowdown, which involve high pressure, high temperature, and a two-phase flow (hot water flashing to steam) containing abrasive solid particles (sludge).
**Key Components & Construction:**
#### 1. Sketch and Description of a Boiler Blow Down Valve
A typical boiler blowdown valve is a **Parallel Slide Gate Valve**. This design is specifically chosen for its ability to handle the harsh conditions of boiler blowdown, which involve high pressure, high temperature, and a two-phase flow (hot water flashing to steam) containing abrasive solid particles (sludge).
**Key Components & Construction:**
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