Description
HAWK 39L contractor gauges are specifically designed to meet the specifications in HVAC/R (heating, ventilating, air conditioning, and refrigeration) industries. The gauges are intended to service the general pressure measurement of the construction industry on water, air, oil, gas or other mediums which do not attack the brass wetted parts. The gauge offers a high reliability at a economic price. A siphon should be installed to protect the pressure instruments from excessive temperature in live steam service or other hot vapor applications.
Typical Applications
- Heating applications
- Plumbing applications
- Ventilating applications
- Air conditioning applications
- Refrigeration applications
Specifications
Operating
Steady: 100%*full scale value
Pulsation: 90%*full scale value
Sudden: 130%*full scale value
The appropriate operating range falls in the middle half of the gauge (25% to 75% of full scale). If you choose the unsuitable range, the fatigue of bourdon tube may be resulted. HAWK Supplies a wide selection of range from vacuum to 1000 PSI including compound range.
Temperature limit
Ambient: -25 to 60°C (Dry Gauge).
Media: max 60°C – Standard.
max 100°C – Option.
Temperature effect
Accuracy of measurement will be effected by the temperature change. This inaccuracy may as high as ±0.3% for 12°C temperature change.
Dial Size
4 1/2″(115mm).
Case&Ring
Stainless Steel case with back flange.
Socket
Brass.
Movement
Brass.
Bourdon Tube
Brass or phosphor bronze.
Window
Acrylic lens.
Best choice for mass public infrastructure and facility such as airport, train station, high-speed rail system, subway, …
Pointer
Anodized aluminum with black finish.
Accuracy
±1.0% of span (Grade 1A to ASME B40.1).
Zero-Adjustment
Micro-adjustable screw on dial.
Scale
PSI, kPa, Mpa, bar, kg/cm2, inHg, cmHg, mmHg (single or dual scale).
Connection
1/4″ NPT standard, BSP, BSPT, M14*1.0 available.
Mounting
Stem mounting.
Weatherproof
NEMA 3/IP54 enclosure.
