70mm 55 bar Brass Connection Refrigeration Pressure Gauge for
Manifold
Description
All gauges show gauge pressure, but some technical information
(that of refrigerant manufacturers, for example) will refer to
absolute pressures. So exercise great care when you consult this
type of literature if you want to avoid making mistakes.
Remember that at atmospheric pressure (that is 0 bar on the gauge),
liquid water evaporates at +100°C, liquid ether evaporates at +35°C
and liquid R22 evaporates at -42°C.
Our gauge is calibrated for R22, the temperature scale therefore
indicates -42°C, which is the temperature of evaporation of R22 at
the pressure measured by the gauge (that is 0 bar gauge).
If the gauge had been calibrated for ether, say, then at 0 bar, the
temperature scale would have shown +35°C.
Applications
Measuring refrigerant ammonia pressure and temperature
Suitable for corrosive environments and gaseous or liquid media
that will not obstruct the pressure system
Process industry: chemical/petrochemical, power stations, mining,
on and offshore, environmental technology, mechanical engineering
and plant construction
Special features
Excellent load-cycle stability and shock resistance
All stainless steel construction
Ammonia refrigerant scales on dial
Specifications
Design | EN 837-1 |
Nominal size | 70mm |
Accuracy | 1.6, 1.0 |
| Pressure range | 55 bar (customized) |
Working pressure | 63mm: Steady: 3/4 x full scale value Fluctuating: 2/3 x full scale value
Short time: full scale value 100mm: Steady: full scale value Fluctuating: 0.9 x full scale value Short
time: 1.3 x full scale value |
| Permissible temperature | Ambient: -40 ... +60 °C - dry; -20 ... +60 °C - glycerine filled -40 ... +60 °C - silicone filled Mediium: +100 °C maximum |
Ingress protection | IP66 |
Temperature effect | When the temperature of the measuring system deviates from the
reference temperature (+20 °C): max. ±0.4%/10 K of the span |
Process connection | Copper alloy |
Pressure element | Copper alloy |
| Movement | Copper alloy |
| Dial | Aluminium |
| Pointer | Aluminium |
| Case | Stainless steel |
| Ring | Steel |
| Window | Plastic, glass, safety glass |
| Unit | bar, psi, kg/cm2, kPa, MPa |
| Thread | G, BSP, PT, BSPT, NPT |
| Options | Other process connection thread
Surface mounting flange
Mounting bracket |
Dimensions
| Size | A | B | C | D | E | J | L | M | N | S | T | W |
| 63mm | 69 | 54 | 32 | 62 | 13 | 3.6 | 7.5 | 85 | 75 | 6.5 | 1/4" | 14 |
| 100mm | 107 | 87 | 48 | 100 | 15.5 | 4.8 | 9 | 132 | 116 | 8 | 1/2" | 22 |
Ordering information
Model / Dial size / Pressure Range / Process connection / Options
