Brass finished safety valve for heating pipe line system with plastic switch (ABS) DN15, DN20 BSP threaded 1/2, 3/4 inch Brass safety valveSize 1/2, 3/4 ISO228 threadedABS switch manual control for heating pipe line systemNormal brass or CW614n, CW617n, MS58 brass optionalBrass color body or nickle plated bodyMax PN30,Max. Temp. +150CFor water, stemWe design and manufacturer a full range of ...