Mark 50 Series Back Pressure Regulator

Mark 50 Series

Self-Operated Back Pressure Regulator

Mark 501 Series picture

Mark 501/502 Series

High Flow

Mark 50HP/60HP Series picture

Mark 50HP Series

High Pressure

Mark 51 Series High Sensitivity Back Pressure Regulator

Mark 51 Series

High Sensitivity

Mark 52 Series picture

Mark 52 Series

Internally Piloted

Mark 53/63 Series

Mark 53/54 Series

Differential, Jorlon Diaphragm

Mark 60 Series

Mark 55 Series

Upstream Vacuum, Jorlon Diaphragm

Mark 56 Series

Mark 56/560 Series

Dome Loaded, High Accuracy

Mark 57 Series

Mark 57 Series

Pilot-Operated, Superior Accuracy

Mark 575 Series

Wafer Style, Jorlon Diaphragm

Mark 58FTA SEries

Mark 58FT/A Series

Cage Trim, Dual Inlet & Outlet for Through-Flow

Mark 58G Series

Globe Style, Back Pressure Regulating Valve

Mark 586 Series picture

Mark 586FT/586A Series

Dome Loaded

Mark 508 Series

Mark 508 Series

Gas Back Pressure Regulator

Mark 518 Series picture

Mark 518 Series

Tank Blanketing Valves

Mark 5108 Series

Mark 5108 Series


Mark 605MM Series Picture

Mark 508MM Series


Y Strainer

Y-Type Strainers

Line Strainers

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For assistance choosing the right back pressure regulator for your application, use our sizing software program or contact your local representative.

How do back pressure regulators work?

A back pressure regulator is a valve that maintains a defined pressure upstream of its own inlet. When fluid pressure at the inlet of the back pressure regulator exceeds the setpoint, the regulator opens to relieve the excess pressure. The back pressure regulator continually adjusts its position to keep the inlet pressure at the desired setpoint.

In the normally closed position, upstream pressure is sensed underneath the diaphragm. As upstream pressure increases above the setpoint, the pressure of the service overcomes the spring force and begins opening the valve. This bleeds off the pressure on the upstream pressure side and maintains the constant upstream pressure.

Benefits Of Using Back Pressure Regulators

Some of the benefits of using back pressure regulators include:

  • Straight-through flow where turbulence is reduced and superior trim life is achieved.
  • Our sliding gate design provides exceptional low flow control since the flow works with the seat and not against it.
  • Short stroke with fast response. The stroke length is typically ⅓ that of a globe valve, reducing the amount of droop (deviation from setpoint) in the regulator.
  • A variety of seat coatings and seat materials to meet almost any application. The Jorcote seat is standard and delivers outstanding performance.
  • The sliding gate design provides an area of closure, not just a line of closure. This area of closure reduces the effects of wire draw which is the most common cause of seat leakage.
  • Less maintenance and downtime, and more opportunity to increase yields and profits.
  • Easy maintenance. Your flow requirements change, and interchangeable Cv’s are available.
  • The movement of the sliding gate seats generates a self-cleaning action.

Applications For Back Pressure Regulators

Our sliding gate back pressure regulators are ideal for steam, liquid, and gas media applications. Our team works with our customers to help achieve tangible results including lower operating costs, optimized performance, prolonged equipment life and higher productivity. You will see our back pressure regulators in a variety of applications including:

Contact us for more information on how we can help you with your back pressure regulator applications.

Frequently Asked Questions

1. What’s the difference between a pressure regulator and a back pressure regulator?

Back pressure regulators perform the opposite function of pressure regulators. A back pressure regulator is normally closed while a pressure reducing valve is normally open. Secondly, the back pressure regulator controls upstream pressure, while a pressure reducing valve controls downstream pressure. Other than that, the valves operate identically.

2. How do you install a back pressure regulator?

A back pressure regulator controls upstream pressure and is installed at the end of the line (unlike a pressure regulator that controls outlet pressure and is installed at the beginning of the line).

3. How do you adjust a back pressure regulator?

To adjust a back pressure regulator you just need to adjust the screw at the top of the valve. You can tighten or loosen the screw.