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SMIT Cast Steel Check Valves have been designed to meet the requirements of BS 1868 /ASME B 16.34/API 6D-ISO14313.
Face to Face and End to End dimensions conform to ASME B 16.10 / BS 2080 / DIN
End flange dimensions conform to ASME B 16.5 / API 605 / BS 3293 / DIN
Butt weld end dimensions conform to ASME B 16.25
The Seat-rings are cylindrical bottom seated type having ample cross section for strength are provided with welded in and threaded Seat-rings will be supplied on request. In case of SS valves the Seat-rings are integral to Body.
The Body to Bonnet joint is a male & female in ASME 150#, 300# & 600# valves and ring joint is used in higher classes.