Natural Gas

Mark 508 Series – Tank Blanketing Valve
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.  The Mark 508 can be used to vent gas from the tank to prevent the blanketing pressure from...
Tank Blanketing Valve - Mark 518 Series
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 1" w.c. to 7 psi (3mbar to 0,5 bar). As a standard feature, the MK518 is provided with soft seals for ANSI Class...
High Pressure Regulator - Mark 68HP Series
The Mark 68HP is designed primarily for high pressure steam service commonly found in power plants, refineries, pulp and paper mills, and other high pressure process applications. Since high pressure superheated steam is routinely used for power generation (turbines), a pressure regulator capable...
Low-Pressure Gas/Tank Blanketing Regulator - Mark 608 Series
The 1-1/2" and 2" size Mark 608 valves are suitable for large tank blanketing applications and other low-pressure gas regulation. In a tank blanketing application, the Mark 608 is used to control the flow of the blanketing gas into the tank to maintain the proper positive pressure. Once the...
Balanced Plug Regulator - Mark 608BP Series
The Mark 608BP Balanced Plug Gas Pressure Regulator is the ideal valve for low pressure gas regulation with higher inlet pressures. The self-contained, low-pressure gas regulator is for use on tank blanketing, gas meter inlet pressure regulating, gas burners and other low-pressure air...
Tank Blanketing Regulator - Mark 608DS
The Mark 608DS is a double-seated, self-operated gas regulator for use in tank blanketing applications. The double-seated design allows the Mark 608DS to handle increased flow and higher pressure drops than similarly sized single-seat valve types while maintaining ANSI Class VI shutoff. The...
Tank Blanketing/Low Pressure Gas Regulator - Mark 608IS Series
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, gas burners, and other low-pressure air and gas applications. The Mark 608IS is normally open. The...
Gas Service Regulator - Mark 627 Series
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. The Mark 627 handles inlet pressures up to 2000 psi (137,9 bar). It features a tamper-resistant...
Gas Service/High Pressure Regulator - Mark 630 Series
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. The rugged design is available in 1" (WCB body) and 2" (Ductile Iron body)...
Air Loaded Globe Regulator - Mark 686 Series
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. Bottom-entry cage trim for simple cleaning or repair allows all working trim parts to be...
Piloted Regulator with Class VI Shutoff - Mark 687 Series
The main valve of the Mark 687 is normally closed. The upstream pressure (PI) enters the main valve body and passes through the piping to the pilot valve. 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...
Control Valve - Mark 128PQC Series
The Mark 128PQC Series Control Valve body assembly is suitable for on-off dump valve service in oil and gas production applications, in either sweet or sour gas conditions. This valve is also useful for on-off high-pressure control of numerous gasses and liquids, and can be used with materials that...
Mark D & DA Series Globe and Angle Style Control Valve
The Mark D & DA Series are single port, screwed-in metal-seated valves with unbalanced post-guided valve plugs, and push-down-to-close plug action used for high pressure applications. These valves are used in the oil and gas industry, and are especially useful for throttling or on/off control...
Angle Style Control Valves - Mark DBAQ Series
The Mark DBAQ Series control valves are ideally suited for high pressure water and steam applications, providing excellent pressure and flow control. This design may be utilized in both high pressure and high temperature control service. The Mark DBAQ is an angle style valve, which may be used...
 Globe Style Control Valve
The Mark E Series (1" - 6") is a single port, globe-style body with composition or metal seats and a balanced push-down-to-close valve action plug.  There are two styles of valves available, providing excellent pressure and flow control on steam, gasses and various liquid applications:...
Globe Style Control Valve - Mark ED & ET Series (8")
The Mark E Series is a single port, globe-style body with composition or metal seats and a balanced push-down-to-close valve action plug.   There are two styles of valve available, providing excellent pressure and flow control on steam gasses and various liquid applications:...
Globe Style Control Valves - Mark EW Series
The Mark EW valve bodies are single port, globe-style bodies with cage guiding, clamped seat rings and push-down-to-close valve plug action. Providing excellent pressure and flow control on steam, gasses, and various liquid processes.   This series features large end connections and...
Globe Style Control Valves - Mark EZ Series
The Mark EZ Series is a globe style valve with integral end connections, post guiding and quick-change trim. Typical applications include chemical or hydrocarbon processing, as well as applications that require control of viscous, non-lubricating or other hard-to-handle fluids. End connection...
Globe Style Control Valves - Mark H-900, H-1500, and H-2500 Series
The Mark H Series control valve provides excellent pressure and flow control on steam, gasses and various liquid applications. The Mark H2D valve is a single port, globe body with cage guiding, and balanced valve plug with push down to close action. Suitable for general applications where tight...
Globe and Angle Style Control Valves - Mark HPX and HPAX Series
Excellent pressure and flow control on steam, gasses and various liquid applications. The HP Series control valves are high pressure globe and angle valves, designed for high-pressure applications in the process control industry. They are equipped with metal seats, cage guiding and quick-...
Control Valve - Mark V-100 Series
The Mark V-100 ball valve bodies have excellent pressure and flow control for gasses, various liquids and fibrous slurries. The Mark V-100 ball valve design utilizes a standard ball with a triangular shape wedge formed in it. This device allows for both throttling control and on/off service used...