We are offering air operated isolated piston valve features : - body material : aluminium, ss cast ( cf8m), brass - diaphragm : viton, nbr, epdm, - application :ideally suited for onoff control of fuel gas - media : air, water, oil, gas, lpg, diesel - port connection : 1", 114", 112", 2",12", 34" - pressure : up to 20 bar - life > 10 million cycles - speed up to 600 cycles min - bubble tight shut off.