REFRIGERATION EQUIPMENT
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| Welding sensor to the pressure port, pressure transmitter designed for refrigerants |
Pressure transmitters are widely used in industrial-grade refrigeration systems: refrigeration plants and units, refrigeration centers and chillers, industrial-grade air conditioning systems.
Refrigeration equipment can have separate low and high pressure transmitters on each cooling circuit. Pressure transmitters monitor operation of refrigeration equipment; they are used in:
- systems regulating performance of injection and suction lines compressors
- systems controlling refrigerant circulation pumps
- flow control systems
- refrigerating unit systems that regulate thermal expansion compensation and control cooling liquid temperature
Data provided by pressure transmitters enables:
- high and low pressure control and threshold signaling
- ventilation systems control
- pressure drop control in compressor units
- evaporator frost protection
Pressure transmitters for refrigeration equipment have a number of distinctive features, including:
- Welded mounting
Refrigerants used in refrigeration units are aggressive to virtually all elastomers.
Measuring their pressure requires a no-seals design, with pressure ports welded to sensors. - Special pressure port versions
Threaded connections of such pressure ports are rarely found in other industries and technological setups: ¼ NPT, G 3 / 8A, ¼ milled, 3/8 soldered, 7/16 "-20 UNF FTHRD. - Output signal
Transmitters can be designed to generate a ratiometric output signal of 0.5-4.5 V.
This kind of output signal linearly depends on the transmitter's supply voltage. - Range adjustment
Low pressure: -1 ... 6 bar; -1 ... 10 bar; -1 ... 16 bar
High pressure: -1 ... 25 bar; -1 ... 40 bar; -1 ... 60 bar
BD Sensors RUS pressure transmitters for industrial-grade refrigeration plants
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Model: |
DMP 330S |  |
|---|---|---|
| Pressure ranges: | from 0 ... 6 to 0 ... 600, from -1 ... 6 to -1 ... 60 bar, gauge pressure | |
| Accuracy: | 0.5% of span | |
| Output signal: | 4 ... 20 mA, 0 ... 10 V, 0.5 ... 4.5 V (Ratiometric) | |
| Permissible media temperatures: | -40 ... + 125 °C | |
| Pressure ports: | G¼ ", G½", 1/4 "NPT, 7/16" UNF | |
| Electrical connections: | DIN 43650, cable gland, DIN 43650C Micro, M12x1 |