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.
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.
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.
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