Hydraulic Mechanical Capillary Temperature Controlled Thermostat For Boiler And Oven
Electro mechanical temperature controls with capillary phial
Rathgeber's capillary tube thermostats are used all over the world to control and limit temperatures (temperature range from -30°C to +400°C)
Rathgeber's products are manufactured professionally in accordance with latest technology and in compliance with the appropriate standard DIN EN 60730.
They operate safely and reliably, provided that specification required is clear at the start of the project.
Rathgeber supply temperature controls, sensors and limiters with phial and with capillary tube length according to customer specification for applications such as:
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Principle of operation
The pressurised system which operates according to the principle of expansion of liquid is the heart of a hydraulic thermostat.
It comprises phial, capillary tube and diaphragm.
Following an increase in temperature at the phial, the liquid expands in the capillary tube, causing the diaphragm to move. This movement activates a snap-action switch, causing opening or closing of switch contacts.
It is clear that a high degree of precision is required in manufacture, as a change in temperature of 1°K can cause a movement of the diaphragm between 0,002mm - 0,01mm.
It is therefore absolutely essential that the phial and capillary tube should not be squashed or otherwise damaged!
The thermostats are calibrated at room temperature 20°C. If during operation the capillary tube and diaphragm are subjected to a higher temperature the switching point will be changed. If the ambient temperature (TU) is known in advance this can be taken into account during the calibration process. Alternatively it is possible to compensate for the influence of ambient temperature upon the liquid at the diaphragm by fitting a bi-metal device.
Normally close, open on temperature rise, automatic reset, Earth Terminal Option | |
Working voltage and current | 16 Amps @ 250 Vac and 16 Amps @ 400 Vac |
Ø Phial diameter | 3/6 mm |
Cycles life | 100,000 cycles |
Open temperature | -35°C to 350°C |
Temperature Tolerance | ±3°C, ±4°C, ±5°C, ±8°C, ±10°C, ±12°C |
Differential Temperature | depending on open temperature |
Contact resistance | ≤100 m |
Capillary length | 300~ 3000 mm; other lengths available upon request |
Body temperature | T120 / T150 |
Faston Terminal Connections | 6,3x0,8 mm DIN46244 |
Contact Closure Resistance: | ≤50mΩ |
Insulation Resistance | ≥100MΩ |
Speed of response | 1.0/min |
.Min. electric current | 200mA |
Typical | Operating temperature | Switch | Voltage | Current | Maximum | |||
H | L | |||||||
OFF() | DIFF(K) | OFF() | DIFF(K) | |||||
WY35A- | 35±4 | 5±3 | -35±4 | 5±3 |
| 400/250 | 16 | 70 |
WY75A- | 75±3 | 5±3 | 25±5 | 5±3 |
| 400/250 | 16 | 110 |
WY110A- | 110±4 | 6±4 | 60±8 | 6±3 |
| 400/250 | 16 | 120 |
WY190A- | 190±8 | 8±4 | 50±8 | 8±4 |
| 400/250 | 16 | 160 |
WY250B- | 250±10 | 10±5 | 120±12 | 10±5 |
| 400/250 | 16 | 250 |
WY350A- | 340±12 | 12±6 | 60±15 | 12±6 |
| 400/250 | 16 | 400 |
Applications:
- 10 / +16 Refrigeration
-35 / +35 Fridge
0 / 40 Ambient
0 / 85 Boliers / Water heaters
0 / 93 Dishwashers
30 / 110 Bain Marie
60 / 200 Deep-fryer
50 / 250 Oven
50 / 300 Oven
Other ranges upon request
Competitive Advantage:
1. VDE CE CQC Approved. |
2. A variety of coating configuration and shell materials are available according to different usages |
3. RoHs (2002/95/EC Directive) compliant |
4. Customized adjuster rod lengths and requirements are accepted |
5. To supply adjustable knob, bezel and mounting screws |
6. Adjustable temperature with positive contact separation |
7. Mounting bushings/fittings and various sealing bushings are available |
8. SPST or SPDT contact configuration |
9. Durable stainless steel or copper construction |
