Requirements for general purpose relay valves for use in 1st and 2nd family gas systems up to 30 bar and in 3rd family gas systems up to 45 bar, with connections from ¼ in to 6 in BSP, including materials, constructional requirements, standards of performance and gas soundness with appropriate tests.
BS 1963:1969
Original price was: $190.50.$95.00Current price is: $95.00.
Specification for pressure operated relay valves for gas burning appliances
BSI Group , 02/13/1970
Pages: 21
