... corrosion resistance.8.The connection parts are in line with new international standards ISO5211 and DIN3337(F03-F25).Pneumatic ... three-piece ball valveModel : ZTQ61(6,8,2)F (N, P, H ... , H, YMode of action: double-acting, single-acting (spring reposition)Control: Switch , Adjust .Selection of Accessories: solenoid valve, locator, limit ...