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  • 4050V Two-Way Dump Valve, High Pressure "N" Trim

    4050V Two-Way Dump Valve, High Pressure "N" Trim

    The Series 4050V valve, with its versatile design, is an excellent choice for use as a dump valve on high pressure scrubbers, separators and other liquid accumulators, as well as for a shut-in valve on plunger lift systems.

  • 2021 Flow Control Throttling

    2021 Flow Control Throttling

    The WellMark Throttling Valve is designed to function as a pressure control valve, and will handle pressure drops up to 4500 psi liquid and 2200 psi gas. It has been used widely in gas gathering systems to regulate flow, CO2, and steam injection systems, as well as in low, medium, and high-pressure separators.

  • 3030 Two-Way Valve, Low Pressure

    3030 Two-Way Valve, Low Pressure

    This valve is ideally suited for on/off or modulating control of liquid, oil, or gas on low pressure applications for use on oil and gas production separators, heater treaters, compressors, or any type of liquid accumulator.

  • 3535 Diaphragm Operated Back Pressure Valve, Low Pressure Single Seat

    3535 Diaphragm Operated Back Pressure Valve, Low Pressure Single Seat

    WellMark’s Back Pressure Valve can be used in any installation where upstream pressure is required to be kept at a preset range. It may also be used as: a pressure relief valve, a custody transfer dump valve to hold a certain back pressure, or as a separator back pressure valve on the gas or liquid side. Upstream pressure is applied to the bottom of the diaphragm through connecting tubing. Spring tension above the diaphragm opposes this pressure, and when the pressure exceeds the pressure setting on the spring, the plug is raised off the seat. By varying the spring tension, the pressure setting can be varied. The typical application for these valves is to hold back pressure on separators, treaters, Lact units, etc.

  • WDV Pneumatic Diaphragm Actuated Dump

    WDV Pneumatic Diaphragm Actuated Dump

    The WDV scrubber valve is used for on/off control of high pressure water, oil or gas. Compressor scrubbers, oil and gas separators, or any liquid accumulators are a few suitable applications. The valve trim is designed to be constantly immersed in the vessel fluid so as to utilize the warmth of the process to help prevent freezing. The WDV opens and closes automatically by pneumatic control from a WellMark level controller and dump valve operator. Diaphragm actuated,WDV dump valves operate at 30-70 psi and up to 2000 psi working pressure depending on model.

  • 2001NB/2001E Pneumatic & Electric Liquid Level Control, High Pressure No-Bleed

    2001NB/2001E Pneumatic & Electric Liquid Level Control, High Pressure No-Bleed

    The Series 2001NB liquid level control, designed with a Die Cast Aluminum control box and cover, provides a rugged and versatile unit that is ideal for use on compressor scrubbers, separators and any production or process units that require liquid level control. Its proportional band and spring balanced displacement element allows for a wide range of adjustability for a variety of liquid level control requirements.

  • 9311 Pneumatic & Electric Liquid Level Switch

    9311 Pneumatic & Electric Liquid Level Switch

    The WellMark Series 9311 is a Pneumatic Snap Acting or Electric Hi/Lo Level Switch. This switch combines the user-friendly features of our Model 2001NB with the rugged external cage of the Model 9321. Together these attributes make the 9311 a robust, reliable Level Switch for the control of liquid level in oil and gas production equipment such as Gas Compressor Scrubbers, Separators, Safety Systems, etc.

  • 9321/9321E Pneumatic & Electric Liquid Level Switch

    9321/9321E Pneumatic & Electric Liquid Level Switch

    The WellMark Series 9321 On-Off Pneumatic Liquid Level Switch operates shut-down valves or alarm systems when liquid in a vessel reaches a predetermined level. This switch uses an externally mounted displacer that operates a nozzle-flapper to vent the supply pressure when the switch is activated. The nozzle-flapper has a soft seat for tight shut-off when the switch is in its normal position (flapper against the nozzle). The Series 9321E is an external cage-mounted electric liquid level switch. Rising liquid exerts a buoyant force on the displacer, producing a torque in the tube. This force will either trip or reset an electrical switch. Falling liquid will trip or reset the same switch if so desired. The WellMark Series 9321E Electric Switch uses the displacer and torque tube movement to trip and reset an electric switch for on-off condition. The displacer can withstand up to 1 1/2 times the maximum working pressure, allowing it to remain in the cage during hydrostatic testing.

  • Series W20

    Series W20

    The Series W20 is a one-piece chamber general purpose, rugged flat glass gauge for mid-range pressure temperature applications. Standard construction includes a solid one-piece chamber machined from carbon steel with carbon steel covers, toughened glass, and plated carbon steel bolts and nuts. All metal parts are rustproofed, and a recessed gasket seat prevents movement, insuring leak-free service.

  • W1200 DVO Low-Bleed Pneumatic Liquid Level Control

    W1200 DVO Low-Bleed Pneumatic Liquid Level Control

    The Series 2001NB liquid level control, designed with a Die Cast Aluminum control box and cover, provides a rugged and versatile unit that is ideal for use on compressor scrubbers, separators and any production or process units that require liquid level control. Its proportional band and spring balanced displacement element allows for a wide range of adjustability for a variety of liquid level control requirements.

  • W2012 High Pressure Pilot

    W2012 High Pressure Pilot

    The Series W2012 Pilot can be used with both Back Pressure Valves and Pressure Reducing Valves. The Pilot will control pressure on scrubbers, separators and other liquid accumulators where the pressure must be maintained at a constant level. When used with Model 4050V (or any other motor valve), the W2012 Pilot can be used to maintain a constant field adjustable pressure setting.