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Ananyo Sengupta 17-07-2013 12:57

Pressure temperature rating as per B 16.34.

Bolted Bonnet Steel Gate Valves

Valve Stems:

Rising Stem with Outside Screw and Yoke

Rising Stem with Inside Screw

NonRising Stem with Inside Screw

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Ananyo Sengupta 17-07-2013 12:57

Body and Bonnet Minimum Thickness:

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Ananyo Sengupta 17-07-2013 12:57

Testing:

Mandatory tests for each valve:1. shell pressure test

2. a closure tightness test

3. a stem backseat test

Shell Test:

Minimum 1.5 times the

pressure corresponding to

the valve 38C

pressure rating.

The packing gland shall

be adjusted so as to

Minimum Duration:

DN50 15s

65DN150 60s

200DN300 120s

350DN 300s

N L k th h h ll