... scale combination valve, automatic compensation for plunger shut-off valve, self sealing valve and double-headed valve. Our products ... have passed through acceptance of province bureau of technical supervision and certification of ISO9001 quality system.Parameters Pressure ... 11ms Operating life,5000 times Material & connection Valve body,LY12-CZValve core:,1Cr18Ni9TiSealing,EPDM(E), ...