The couplings have automatic shut-off valve only in the socket. Therefore, the socket is used on the supply side. This type is popularly used for air piping, connecting pneumatic tools, cooling water con-nections for moulds, and connections for breathing appara-tus. Additional safety lock can also be provided. Construc-tion: valve - automatic shut-off valve only in the socket; end connections - H -hose nipple; M - male threads; F - female threads; lock system - ball lock or pin lock; standard material - steel, stainless steel, brass, aluminium; and eeals - nitrile, viton; Teflon available on request.
