Mark 660 Series – High Capacity Air Loaded

The Mark 660 is a highly accurate, air loaded pressure regulator that provides regulation from a local station or from a remote station.
 
The operation of the Mark 660 requires no control spring or pilot. A static air signal is applied to the top of the diaphragm to determine the setpoint. The Mark 660 has a rangeability of approximately 40:1.
 
The setpoint is adjusted by controlling the air pressure supplied to the top of the diaphragm. The supplied air pressure opens the valve to allow the process media to pass through the seats. The downstream pressure is sensed beneath the diaphragm. As the downstream pressure exceeds the setpoint, pressure is exerted on the diaphragm, raising the stem to modulate the seats toward the closed position.

• Highly accurate air loaded pressure regulator

• No control spring or pilot required

• Setpoint is adjusted by controlling the air pressure supplied to the top of the diaphragm

• Remote operation / frequently changing setpoints