MID-WEST- Bellows Type Differential Pressure Gauges

Bellows type: – ± 1/2% or ± 1% Full Scale Accuracy. System pressure is applied to the internal volume of a bellows and mechanical linkage assembly. As pressure changes, the bellows and linkage assembly move to cause an electrical signal to be produced or to cause a gauge pointer to move. The major components of the Model’s 105/106/115 and 116 are a two-piece body, bellows sensing element and over-pressure assembly, a torque tube assembly, a range spring and the gauge front assembly.

The body halves provide the pressure containment function. They also clamp the sensing element and over-pressure assembly between the halves, isolating the high side and low side pressures of the system. The high side body half also provides a mount for the torque tube assembly and the gauge front assembly.

The sensing element is exposed to the differential pressure and deflects in response to the differential pressure. This assembly incorporates a bidirectional relief valve which provides over-pressure protection in both directions. When over-pressured from the high side, the valve is opened by a mechanical stop as the sensing element deflects to its maximum travel. When over-pressured from the low side, the spring-loaded valve opens when the differential pressure exceeds its maximum rating.

The opening of the valve in either direction equalizes the pressure and protects the unit. A range spring is provided to adjust the spring rate of the system to suit the various differential pressure ranges of the instrument. NOTE: The use of diaphragm seals is not recommended for model105/106 series gauge. Attempts to install such seals on these gauges will void the warranty.

Models 105 and 106

Model 105

Product Features:

  • Over-Range Protection, High over Low and Low over High
  • Micro Adjust Pointer
  • Wide Selection of DP Ranges & Scales
  • Bellows or Multiple Diaphragm Sensing Element
  • Working Pressures up to 6000 PSIG (400 bar)
  • Gauge Housings available in Aluminum, Brass, Carbon Steel and Stainless Steel 316/316L
  • Wide Range of Elastomers

Special Features:

  • Over-range Protection Full to Maximum Working Pressure
  • Panel Mounting Standard, Front or Panel 6″ or 4-1/2″
  • Pipe Mounting Kit Optional, 2″ U-Bolt
  • Wall Mounting Optional – Flush Panel or Rear Bracket
  • NACE Compliance Optional
  • Seismic Compliance Optional

Model 106

Product Features:

  • Over-Range Protection, High over Low and Low over High
  • Micro Adjust Pointer
  • Wide Selection of DP Ranges & Scales
  • Bellows or Multiple Diaphragm Sensing Element
  • Working Pressures up to 6000 PSIG (400 bar)
  • Gauge Housings available in Aluminum, Brass, Carbon Steel and Stainless Steel 316/316L
  • Wide Range of Elastomers

Special Features:

  • Over-range Protection Full to Maximum Working Pressure
  • Panel Mounting Standard, Front or Panel 6″ or 4-1/2″
  • Pipe Mounting Kit Optional, 2″ U-Bolt
  • Wall Mounting Optional – Flush Panel or Rear Bracket
  • NACE Compliance Optional
  • Seismic Compliance Optional

Models 115 and 116 - ``Cryogenic``

Model 115

Product Features:

  • Drop in replacement for Barton and Prime Measurements
  • Over-Range Protection, High over Low and Low over High
  • Micro adjust pointer
  • DP Ranges from 0-10″ H2O to 0-69.9″ H2O
  • Tamper Proof, All adjustments require removal of bezel for access.
  • Snap acting micro switch for alarm (optional)
  • In house Oxygen Cleaning (optional)
  • Private labeling (optional)
  • Black ink on white dial or white ink on black dial

Standards:

Model 115 Series Gauges either conform to and/or are designed to the requirements of the following standards;

  • ASME B1.20.1
  • ASME B40.100
  • NEMA Std. No. 250
  • UL Std. No. 50
  • CSA-C22.2 No. 14
  • SAE J514

Model 116

Product Features:

  • Drop in replacement for Barton and Prime Measurements
  • Over-Range Protection, High over Low and Low over High
  • Micro adjust pointer
  • DP Ranges from 0-70″ H2O to 0-800″ H2O
  • Tamper Proof, All adjustments require removal of bezel for access.
  • Snap acting micro switch for alarm (optional)
  • In house Oxygen Cleaning (optional)
  • Private labeling (optional)
  • Black ink on white dial or White ink on back dial

Standards:

Model 116 Series Gauges either conform to and/or are designed to the requirements of the following standards;

  • ASME B1.20.1
  • ASME B40.100
  • NEMA Std. No. 250
  • UL Std. No. 50
  • CSA-C22.2 No. 14
  • SAE J514