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Natural Gas

Mark 68HP Series – High Pressure

The Mark 68HP is designed primarily for high pressure steam service commonly found in power plants, refineries, pulp & paper mills and other high pressure process applications.

Mark 508 Series – Tank Blanketing

The Mark 508 Gas Back Pressure Regulator is the ideal valve for low-pressure gas regulation. The Mark 508 works in conjugation with the Mark 608 in a low-pressure tank blanketing valve system.

Mark 518 Series - Double Seated Tank Blanketing

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...

Mark 608 Series – Low-Pressure Gas/Tank Blanketing

The 1-1/2" and 2" size Mark 608 valves are suitable for large tank blanketing applications or other low-pressure gas regulation.

Mark 608BP - Balanced Plug Regulator

The Mark 608BP Balanced Plug Gas Pressure Regulator is the ideal valve flow pressure gas regulation with higher inlet pressures.

Mark 608DS – Tank Blanketing

The Mark 608DS is a double-seated, self-operated gas regulator for use in tank blanketing applications.

Mark 608IS – Tank Blanketing/Low Pressure Gas

The Mark 608IS gas pressure regulator is ideal for low-pressure gas regulation. The self-contained, low-pressure gas regulator is for use on tank blanketing, gas meter inlet pressure regulating.

Mark 627 Series - Gas Service

The Mark 627 is a self-operated, pressure-reducing regulator that provides accurate regulation and tight shutoff on low or high-pressure systems. Use on air, natural gas, or a variety of other gases.

Mark 630 Series - Gas Service/High Pressure

The Mark 630 is a self-operated, pressure-reducing regulator that provides accurate regulation and tight shutoff on high-pressure gas systems. It handles inlet pressures up to 1500 psi (103,4 bar) for a variety of gases.

Mark 686 Series – Air Loaded Globe Regulator

The Mark 686 is a cage trim pressure-reducing valve that features air-loading, high capacities, accurate regulation, and easy servicing, making it an exceptional choice for pressure regulating applications.

Mark 687 Series - Piloted Regulator with Class VI Shutoff

The main valve of the Mark 687 is normally closed. The pilot valve is normally open, allowing the upstream pressure to move through the outlet port of the pilot valve to act on the bottom of the main valve diaphragm. This force pushes the stem upward, opening the main valve. The Mark 687 modulates between open and closed to maintain control.

Valve by Application