Description
Design standard
EN837-1
Dial size, ranges & accuracy
Possibilities in ranges and accuracy. Accuracy class is based on dry gauges.
| Dial size | Ranges | Accuracy |
|---|---|---|
| 40mm | 0…1 bar – 0…400 bar 0...15 psi – 0...5800 psi | 1,6% |
Process connection
| size | Standard thread | Optional | SW Size |
| 40mm | G 1/8 A or 1/8” NPT | ¼” with adapter nipple | 12mm |
Materials of construction
- Case :AISI 304
- Bezel :AISI 304
- Connection1 :AISI 316
- Sensing element1 : AISI 316
- Movement : Brass
- Pointer : Aluminium
- Dial : Aluminium
- Window : Gasket Cardboard
- Window : Glass
1) wetted materials
Pressure limitations
The gauge are built to withstand harsh environments however the EN 837 limits the use of a pressure gauge according below table.
| Dial size | Steady | Fluctuating | Short time |
| 40mm | 0.75 x FSV | 0.67 x FSV | FSV |
FSV: full scale value
Temperature limitations
The gauges can withstand ambient and process temperature up to a certain limit. The limitations on temperature are:
| Ambient | Medium | |
| Dry case | -40°C …+60°C | -40°C…+200°C |
The variation of indication caused by the effect of temperature shall not exceed: ± 0.4% / 10K FSV
Window Standard
Standard BDT1-218 gauges have an glass window.
Pointer
Standard pointer is a fixed black painted aluminum pointer.
Dial facing
The dial plate is made from aluminum and coated with UV resistant white coating. The black dial markings, scale, numbering, and interval is according the EN 837. Options like colored dial, customer logo, or colored segments are possible as well. Scale interval and numbering is following the EN837.
Limit stop
To prevent permanent damage the gauge is protected by an vacuum limit stop on the dial.
Degree of protection
The BDT1-218 has a standard degree of protection of IP44. The values are determined according the IEC/EN 60529.
