Main 506-857-3191

Toll Free 877-857-3191

After Hours Emergency 877-853-2473

Dwyer

7000B Series Spirahelic® Grade A Direct Drive Pressure Gauge, 4-1/2" , 0 - 300 psi, Bottom Mount, Analogue

Model: HD254

Mfr. Model No.: 7100B-G300

Colour, sizing or style depicted in some photos may not be exactly as described.
Please check your product description carefully before placing your order.

Sold as: Each

  • Dial Diameter: 4-1/2"
  • Pressure Range: 0 - 300 psi
  • Connection: Bottom Mount
  • Dial Type: Analogue
  • Accuracy: 2%-1%-2%
  • Fill Fluid: Silicone
  • Pressure Limits: 2500 psig (172.4 bar) or 150% of Full Scale
  • Temperature Limits: -65 to 180°F (-53.9 to 82.2°C)
  • Housing Material: Black Polycarbonate Case and Clear Acrylic Cover
  • Turret mount housing features a triple coil spiral/helical wound Bourdon tube to provide dependable service
  • Bourdon tube design eliminates gears, springs, linkages, and complex movements which can wear and cause inaccuracy or early failure
  • Comes standard with a dual-size 1/2" male NPT and 1/4" female NPT process connection
  • Due to the small volume of the triple wound Bourdon tube inside the Spirahelic® gauge, a much smaller diaphragm seal may be selected versus a standard "C" Bourdon tube gauge
  • Smaller seal is extremely compact, lightweight, and durable, which eliminates difficult installation issues with bulky diaphragm seals
  • Seals are also offered with an optional 1/4" NPT flush port which makes clean outs quick and easy
  • Services compatible gases and liquids
  • Design conforms to ASME B40.1
  • Normal operation should be between 25% and 75% of full scale
  • Gauge will maintain its specifications for overpressures up to 150% maximum range