Search by:

  • Position Indicators

    Position Indicators

    General Purpose Visual Position & Flow Path Monitor

  • 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.

  • PT 988 Pneumatic Liquid Level Switch

    PT 988 Pneumatic Liquid Level Switch

    WellMark’s PT988 Pneumatic Level Switch is designed for horizontal mounting in a tank or vessel through threaded or flanged pipe connections (will work in an API 2″ full coupling) and is excellent for applications where space is a factor. It can be externally caged for vessel isolation and can be used as a high or low level alarm, as well as a liquid level control. In addition, it can be switched from direct to indirect action simply by inverting the unit 180˚. The PT988 features a 3-way snap-acting pilot (0 to full output using 20-30 psi supply pressure) or order it with an optional throttling pilot (3 to 15 psi output with a 20 psi supply pressure).

  • 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.

  • W30 Gauge Valves

    W30 Gauge Valves

    Series W30 Gauge valves are recommended for use with WellMark’s Series W20 Visual Level Indicators and are compatible with all industry standard, armored flat-glass liquid level gauges. Plain/Union and Union/Union connections make for easy installation and removal.

  • 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.