Exam Question
Sketch a high-lift safety valve lid and seat detailing their special features. Describe how such a valve is overhauled and any clearances that should be measured and noted.
Class 2 (2nd Engineer)
MEKG
📅 Mar 2018
Reference Answer
Special Features of Valve Lid and Seat:
The seat's design deflects escaping steam towards the valve lid's lip, boosting the valve's lift. This increases the efficiency of steam release.
The pressure of escaping steam acting on a piston provides extra lift to the valve. This helps in a faster, more complete opening.
A loose pin secures the valve lid, allowing for thermal expansion without stress.
The seat's design deflects escaping steam towards the valve lid's lip, boosting the valve's lift. This increases the efficiency of steam release.
The pressure of escaping steam acting on a piston provides extra lift to the valve. This helps in a faster, more complete opening.
A loose pin secures the valve lid, allowing for thermal expansion without stress.
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