Regulation 57. Stop valves.

P.U.(A) 5/70

FACTORIES AND MACHINERY (STEAM BOILER AND

                   UNFIRED PRESSURE VESSEL)

                             REGULATIONS, 1970

            PART III - UNFIRED PRESSURE VESSELS

Regulation 57. Stop valves.

(1) Every stop valve for a steam receiver shall comply with the provisions of these regulations

relating to main stop valves for steam boilers.

(2) A stop valve or cock shall not be fitted between any unfired pressure vessel shall and its

safety valve or rupture disc.

(3) A stop valve or cock shall not be fitted between any safety valve or rupture disc and its

discharge pipe.

(4) Where a stop valve is placed in the discharge line between a compressor and an air receiver,

a relief valve shall be placed between the compressor and the stop valve unless the compressor

is provided with an automatic unloading device.

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