The Mark 74 provides long-term, leak-free performance when fugitive emissions are a primary concern. The Mark 74 offers exceptional bellows life with a valve stroke that is just a fraction of that of other rising stem valves.
The Mark 76 (1/2" - 2") typically functions using a 0 psi or 20 psi control signal. Through the use of a solenoid, either 0 psi or 20 psi is supplied to the actuator. Depending on the configuration of the sliding gate seats, 20 psi will either open or close the valve.
The Mark 78 pneumatic control valve is designed for accurate performance and simplified maintenance. It can be used on a variety of applications including viscous/corrosive liquids, process gases or utility steam in process or utility service.
The Mark 79 is an air-operated control valve used for diverting service; ideal for bypassing fluids around coolers or filters. It can also be used as a combining or mixing valve with two inlets and one outlet.
The Mark 2000 is an externally piloted, angle-seat valve with self-adjusting packing gland, intermediate relief and wiper. The compact size and light-weight design makes this valve ideal for OEM machinery and other applications where space is limited.
The Mark V1C cage-guided, balanced trim control valve offers high pressure and tight shutoff with standard spring/diaphragm actuators. The balanced cage trim design enables this valve to handle differential pressures up to 1480 psi (102 bar) through the 6" (DN150) size.