... used with chemicals, water, steam, and some gases.Hydraulic quick coupling TEMPERATURE RANGE-25oC+120oC/-13oF+250oFWith standard seals: Buna ... request seals: Viton, Neoprene, EPDM or other seals.Hydraulic quick coupling MAX. WORKING PRESSURE:1/4"-----04 :350BAR3/8"-----06 ... treatment :Zinc plating and Cr 3+ Passivationor Yellow Passivations Hydraulic quick coupling,hydraulic quick release coupling