Regulation 16. Main stop valve.

P.U.(A) 5/70

FACTORIES AND MACHINERY (STEAM BOILER AND              

                 UNFIRED PRESSURE VESSEL)

                          REGULATIONS, 1970

                    PART II - STEAM BOILERS

Regulation 16. Main stop valve.

(1) Every steam boiler main stop valve shall be fitted direct to its pad on the steam boiler shell

except where a superheater forms an integral part of the steam boiler or where for the purpose of

drainage it is necessary to interpose a stand pipe between the pad and the stop valve, in which

case such stand pipe shall have a height not greater than five times its diameter.

(2) Where two or more steam boilers are connected to a common steam pipe every main stop

valve shall be of the non-return or self-closing type unless a self-closing valve is interposed

between each main stop valve and such common steam pipe.

(3) Every main stop valve shall bear the manufacturer's or maker's name, its design pressure and

indicate the directions of flow and closing of the hand wheel.

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