Mid-West - Bellows Type Differential Pressure Gauges

Mid-West – Bellows Type Differential Pressure Gauges

Bellows type DP gauges provide ± 1/2% or ± 1% Full Scale Accuracy. The system pressure is changed to electric signals or gauge movements with the bellows and mechanical linkages inside constructed with two piece body, bellows sensing component, torque tube assembly, range spring, and gauge front assembly that are standard in Models 105/106/115 and 116.

Mid-West Model 105 Bellows Type DP Gauge

The bellow type 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.

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
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

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Model105

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Mid-West Model 106 Bellows Type DP Gauge

The bellow type gauge 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.

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

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
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

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Model106

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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.

Mid-West Model 115 Bellows Type DP Gauge

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.

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

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Model115

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Mid-West Model 116 Bellows Type DP Gauge

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

Model 115/116 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

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Model116

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Bellows Type DP Gauges