MK60 Sliding Gate Pressure Reducing Regulators
The MK60 Sliding Gate Pressure Regulator is used to regulate the downstream pressure to a predetermined setpoint. The spring in the Mark 60 holds the sliding gate seats in their normally open position to allow the process media to pass through the seats.

• Fast Response — the short stroke means fast response to changes in process conditions, resulting in less offset in pressure.
  
• Straight-through Flow — The flow is straight through the valve seats and body. Direction of the disc travel is at right angles with the flow, not opposed to the direction of the flow. Thus, the flow does not unbalance the seats.
  
• Quiet Operation — The design of the Sliding Gate seats makes it inherently quieter than other types of regulators. The disc and plate are always in contact, which eliminates chattering. Straight-through flow minimizes turbulence.

MK68 Globe Style Pressure Reducing Regulators
The Mark 68G is a globe-style pressure reducing regulating valve that offers high capacity, accurate regulation, and easy servicing, making it the ideal choice for your industrial-grade pressure reducing applications. The bottom-entry design ensures the Mark 68G is easy to clean or repair. The diaphragm can be easily accessed from the top allowing some repairs to be conducted without removing the valve from the line.

MK50 Sliding Gate Back Pressure Regulators
The Mark 50 Sliding Gate Back Pressure Regulator is used to regulate upstream pressure at a predetermined setpoint. The spring in the Mark 50 holds the sliding gate seats in their normally closed position.

• Fast Response — the short stroke means fast response to changes in process conditions, resulting in less offset in pressure.
  
• Straight-through Flow — The flow is straight through the valve seats and body. Direction of the disc travel is at right angles with the flow, not opposed to the direction of the flow. Thus, the flow does not unbalance the seats.
  
• Quiet Operation — The design of the Sliding Gate seats makes it inherently quieter than other types of regulators. The disc and plate are always in contact, which eliminates chattering. Straight-through flow minimizes turbulence.

MK58 Cage Trim Back Pressure Regulators
The Mark 58 back pressure regulator features three ports: a bypass outlet on the bottom, and two side ports which are directly connected to serve as dual inlets or as inlet and outlet for through-flow. It is designed to be installed in a “T” fashion such that the fluid normally flows in one side and out the other side, with the flow being relieved through the bottom bypass when the pressure exceeds the setting. It can also be installed with one side port as an inlet and the other side port plugged. In this arrange- ment when the inlet pressure exceeds the set point, fluid is relieved through the bottom port.

The Mark 58 is available in sizes up to 2" (DN50) in a wide variety of body materials. Diaphragms can be either Stainless Steel or Elastomer. Low flow versions with Cv values as low as 0.26 (2,24 Kv) are available in certain sizes.