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- Marsh Bellofram - Marsh Division - Diaphragm Gauges
Marsh Bellofram - Marsh Division - Diaphragm Gauges
Marsh Bellofram - Marsh Division - Diaphragm Gauges
- Accuracy: For ranges 30" H2O and above, ASME Grade A accuracy is ±2/1/2% (±1% of range across the middle half of the scale). For ranges below 30" H2O, accuracy is ±3/1/3%.
- Case Sizes: Available in 2.5", 3.5", and 4.5" diameters.
- Case Material: Steel, black painted.
- Case Style: Options include Center Back Mount (CB), Three-holed Front Flanged Mount (FF), Lower Mount (LM), and U-Clamp Mount (UC).
- Diaphragm & Socket: Phosphor bronze diaphragm soft-soldered to brass socket.
- Movement: Brass sector and pinion.
- Connection: 1/8 & 1/4 NPT.
- Dial Standard: Dual Scale with kPa and Triple Scale: oz/in2, in H2O, & kPa.
- Dial Color: Black markings on white.
- Pointer: Aluminum, black painted.
- Window: Acrylic twist-in Clearlok for 2.5" & 3.5"; flat acrylic with steel friction ring for 4.5".
- Restrictor: 0.013" standard, no restrictor on 0 to 10" H2O range.
- Available in dial sizes of 2.5", 3.5", and 4.5" with four case styles.
- Accuracy conforms to ASME B40.1 - 2/1/2%.
- Typical applications include HVAC systems and low-pressure gas burner systems.
- Available in various sizes and configurations with different connection types and pressure ranges.
- Options include different window materials, restrictors, case materials, and connection types.
- Consult factory for specifications.
- Includes a 2.5" dial size gauge with dual scale in H2O & kPa vacuum.
- Includes a 2.5" dial size gauge provided in a grey polyethylene case with 3 ft. of rubber tubing.
Catalog excerpts
36 Diaphragm DIAPHRAGM GAUGE OPTIONS OPTION TYPE AVAILABLE ON MODELS Window Acrylic (knurled edge) all models Restrictors 0.008 Restrictor all models 0.016 Restrictor 0.018 Restrictor 0.025 Restrictor Ring Press ring, chrome 212" to 312" Panel Mount Ring / Window Glass & Black Steel Ring 212" to 312" all models Cases Stainless Steel 212"- Lower Mount or Panel Mount Brass 212"- Lower Mount or Centerback Chrome plated Lower Mount or Centerback 312" Case Center Back (CB) 312" U-Clamp (UC) 312" Connections Hose Barb (18" OD & 14" OD) All models (10 pc. minimum) Compound Ranges Vacuum & Pressure with...
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