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Swing Check Valve Manufacturing Specifications
|
Content |
Specification |
|
General design standard |
ASME B16.34/API600 |
|
Pressure-temperature rating |
ASME B16.34 |
|
Face to face dimensions |
API6D/ASME B16.10 |
|
Flange type and dimensions |
ASME B16.5 |
|
Butt-welded end |
ASME B16.25 |
|
Inspection and test |
API598 |
SEV Swing Check Valve Construction Features Function
● Constriction
SEV swing check valve adopt B.B. single disc swing, which is in accordance with international general standard.
● Seat
For SEV swing check valve in different pressure or specifications, the seat would have the following types:
1.The connection of the seat ring and the body may either be threaded or welded type. The threaded type seat is easy for disassemble, maintenance and replacement.
2.The sealing surface is directly welded on the body.
3.For stainless steel gate valve, the sealing surface is machined and finished on the body.
● Gasket
The connection between body and bonnet shall be bolted flange. Gasket of flange shall be as follows:
Below Class 600 Female and male gasket
CLASS 600 & Larger Octagon ring gasket
The metal spiral wound gasket with inner ring and filling with graphite makes more reliable for the seal of the gasket and excellent capability of disassembling and reassembling.