SERIES MARK

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Dwyer Series Mark Valve Position Indicators | Weatherproof & Explosion-Proof

DWYER MARK VALVE POSITION INDICATORS | WEATHERPROOF & EXPLOSION PROOF

The Dwyer Series Mark Position Indicators offer a versatile range of solutions for monitoring and transmitting the status of rotary and linear valves in demanding industrial environments.

A line of high-durability position indicators, switches, and transmitters designed for rotary and linear valves, featuring weatherproof and explosion-proof enclosures.

  • Thick white styrene-acrylonitrile housing is virtually indestructible
  • Moderate overpressures are accommodated by an overflow tank (Model 25) or floatoperated overflow traps (Model 40)
  • Able to be mounted on any vertical surface

 

DWYER MARK VALVE POSITION INDICATORS | WEATHERPROOF & EXPLOSION PROOF

The Proximity™ Series Mark encompasses several models—including the Mark 1, Mark 3, and Mark 4—to suit diverse process applications. The Mark 1 and 3 utilize a patented magnetic drive that completely seals the switch compartment from the atmosphere, providing maximum leak protection in corrosive or hazardous environments. The series supports a wide array of outputs, including up to 6 switches (13+ varieties), potentiometers, 4-20 mA transmitters, and HART® communication.

PRODUCT USES:

  • Valve Monitoring: Real-time position feedback for rotary (quarter-turn) and linear (lever-drive) valve actuators.
  • Harsh Environments: Ideal for offshore oil rigs, chemical processing, and wastewater treatment due to its corrosive-resistant housing.
  • Automation Integration: Providing 4-20 mA signals to PLCs or DCS for precise process control.

Technical Sheets

Instruction Manual

Catalog Page

Specifications

DWYER WE02 3-PIECE STAINLESS STEEL BALL VALVE  | AUTOMATED PROCESS VALVE – KEY SPECIFICATIONS

  • Environmental Ratings: Weatherproof and explosion-proof; rated for NEMA Types 1, 2, 3, 3R, 3S, 4, 4X, 6, 7, 9, 12, and 13.
  • Temperature Range: Standard operating limits from -58°F to 176°F (-50°C to 80°C). High-temperature switch options available up to 350°F (176°C).
  • Operational Life: Tested for durability over 10,000,000 cycles.
  • Output Options:
    • Switches: Choice of 1 to 6 switches (16 varieties), including gold contact, inductive, and high-current models.
    • Analogue: 4–20 mA transmitter or potentiometer (1000 ohm standard).
    • Communication: Compatible with HART® and Wireless HART® protocols.
  • Rotational Travel:
    • Mark 1 & 4: Adjustable from 5° to 360°.
    • Mark 3: Designed for multi-turn applications from 1 to 25 revolutions.
  • Accuracy: ±0.5% of full span for transmitters and potentiometers; optional high-precision ±0.25% available.
  • Electrical Connections: 3/4″ female NPT conduit connection standard; screw terminal block for wiring.
  • Submersible Rating: IP68 rated; submersible up to 15 meters (50 feet).
  • Mounting: Not position sensitive; suitable for direct drive (rotary) or lever drive (linear) valves

 

 

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