Mark 518 Series – Tank Blanketing Valves
The Mark 518 is a back-pressure regulator for use in low pressure air and gas services. With a selection of six pressure ranges, set points can be chosen to control back-pressures from 1″ w.c. to 7 psi (3mbar to 0,5 bar). As a standard feature, the MK518 is provided with soft seals for ANSI Class VI shutoff. The valve is also leak-proof under vacuum conditions.
The Mark 518 back-pressure relief valve is used for maintaining the pressure of air and gases in the positive inches w.c. (mbar) pressure range.