BALL VALVE DESIGN FEATURES: A Literature-Part-2 of 4 want2learn
July 17, 2014 No Comment Pipe fitting, Piping books and
literatures, Piping components, Piping Layout, Piping literatures
Single Piece Body Design
In the single piece design valve, the body will be cast/forged
as one piece. The insertion of the ball will be through the end of
the body and is held in position by body insert.
This design offers the unique advantage of eliminating the
possibility of external leakage to the atmosphere through bolted
body joints.
This design restricts the valve to be of reduced port floating
design only (for sizes up to 4NB).
Single Piece Design
Two piece / Three Piece Design
Two-piece design complements the single-piece design in sizes of
6 & above for reduced bore and for FB design valves.
In two piece design, the body is constructed in two pieces and
the ball is held in position by body stud. There can be full bore
or reduced bore design possible in this construction.
In case of three piece design, the body has two end pieces and
one centre piece. Three piece design valves are most easily on-line
maintainable. By removing the body bolts keeping only
one, the body can be swung away using the last bolt as fulcrum,
to carry out any installation or maintenance operation on the
valve. This feature reduces maintenance downtime to a bare
minimum.
Multipiece Design
