Description
HAWK 21L and 21B series bourdon tube all stainless steel pressure gauges are designed to fulfill the requirements of high quality from various industries. The wetted parts can be in brass, 316 stainless steel or monel. The 316SS construction pressure gauges are good in use on demanding applications where corrosion resistance, rugged environment resistance and reliable operation are required. Liquid Filling or dampened movement is available to diminish the effects of vibration, pulsation and shock and further enhances the gauge life. These gauges are ideal to use combined with diaphragm seal where re-calibration is required.
Typical Applications
- Petrochemical and chemical processing
- Medical and pharmaceutical industry
- Industrial OEM equipment
- Hydraulic monitoring systems
- Power generating stations
- Offshore oil platforms
- Pneumatic systems
- Level measurement
Specifications
Operating
*P-1A-21 Dial 4″,6″:
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 20,000 PSI including compound range.
*P-1A-21 Dial 2.5″,3.5″:
Steady: 75%*full scale value
Pulsation: 50%*full scale value
Sudden: 100%*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 15,000 PSI including compound range.
Temperature limit
Ambient:
– 40 to 80°C (Dry Gauge).
– 10 to 65°C (Glycerin Filled Gauge).
– 50 to 80°C (Silicon Filled Gauge).
Media: max 125°C (Standard), 300°C (Optional).
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.
Size
2 1/2″ (63mm), 3 1/2″ (90mm), 4″ (100mm), or 6″ (150mm).
Case&Ring
Stainless Steel 304 (SS316 – Option), polished bayonet ring.
Socket
*P-1A-21 Dial 4″,6″:
316L-Stainless Steel.
*P-1A-21 Dial 2.5″,3.5″:
316L-Stainless Steel-Bottom connection.
316 Stainless Steel-Back connection.
Movement
Stainless steel movement with overload and underload stops-standard, silicon dampened movement on request.
Bourdon Tube
*P-1A-21 Dial 4″,6″:
316L-Stainless Steel.
30″Hg(Vac) to 1500PSI…C-type.
2000 to 20000PSI…Helical type.
*P-1A-21 Dial 2.5″,3.5″:
316L-Stainless Steel.
30″Hg(Vac) to 900PSI…C-type.
1000 to 15000PSI…Helical type.
Window
Tempered safety glass – Standard.
Plain glass, Polycarbonate or Laminated safety glass – Option.
Several Kinds of Window
Pointer
Anodized aluminum with black finish.
Accuracy
*P-1A-21 Dial 4″,6″:
±1.0% of span (Grade 1A to ASME B40.1).
*P-1A-21 Dial 2.5″,3.5″:
±2-1-2% of span (Grade A to ASME B40.1).
Zero-Adjustment
Micro-adjustable pointer.
Scale
PSI, kPa, Mpa, bar, kg/cm2, inHg, cmHg, torr, mmHg (single or dual scale).
Connection
*P-1A-21 Dial 4″,6″: 1/2″, 3/8″, 1/4″ NPT standard, JIS, DIN, M14*1.0, 3/4″ NPT, and M20*1.5 available.
*P-1A-21 Dial 2.5″,3.5″: 1/4″, 1/8″ NPT standard, JIS, DIN, M14*1.0 available.
Mounting
Stem or Flushing (U-clamp/Flange) mounting.
Weatherproof
NEMA 4X/IP65 enclosure.
