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FUNCTION
The
swing check valve is designed so that it is opened
automatically at the forward flow and closed at
the reverse flow in horizontal or vertical (upward
flow only through valve) piping runs. It has an
advantage of low pressure drop and therefore is
best suitable for velocity application.
BODY
The body has a spherical form with large radius,
which permits the stress, turbulence and resistance
to flow to be kept minimum. The bonnets on valve
are equipped with back seat rings.
BODY-COVER
JOINT
Body-cover
joint of swing check valve is machined as follows:
Class 150 : Male and female.
Class 300 and 600 : Male and female.
Class 900 higher class : Ring joint.
We can supply any kinds of gasket as required
by customer.
SEAT
RING
The seat ring as a welded-in type is designed
to prevent any turbulence and damage by corrosion.
It is are forged or rolled into one piece for
all dimensions, heat treated to obtain the desired
surface hardness, and cleaned thoroughly before
assembling.
END
CONNECTIONS
In
our standard production of valves, the flange
ends (RF) and the face to face dimensions conform
to ANSI B16.5 and ASME B 16.10, respectively,
and they have a raised face serrated finish type
or other finish type as requested.
For butt-welded ends (B.W), of which the end to
end dimension conforms to ASME B16.1 0, customer
must specify the schedule type required, pipe
class, or bore diameter.
Ring joint flanged ends (R. T.J) conform to ASME
B16.5 and the end to end dimension follows ASME
B16.1 O.
The other special end connections may be supplied
as required by customer.
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