STW II Capillary Tube Thermostat
16 A, Fail-safe
Product Description | STW II Capillary Tube Thermostat |
Product Type | 27-6D.2-52.5/1.00 |
Brand | Bartec |
- Small construction
- Varying temperature ranges can be combined in one enclosure
- Can be mounted directly in Zone 1
- Temperature can be set in Zone 1
- Many variants available
Description
The STW II is a compact ON/OFF type capillary tube thermostat, housed in an Ex e certified polyester enclosure. Heaters, fans, motors and other equipment are energised and de-energised by means of this thermostat when specific temperature ranges are exceeded. This device can also be used to control the temperature in air or on various surfaces.
Function
Any change in temperature at the sensor bulb causes a change in the volume of fluid in the measuring system, which in turn results in a movement of the diaphragm membrane. This membrane is connected to a mechanical device that activates a microswitch. If the temperature at the sensor bulb exceeds the pre-set value, terminals 1 and 4 are opened. If there is a rupture or break in the sensor tube (leakage), then the switch remains permanently open (fail-safe). If the temperature falls below the minimum setting, the autocontrol opens the circuit but closes again on temperature rise.
Technical Data
Protection Class | IP 65 (EN 60592) |
Dimention | Device for 1 heating circuit: 120 x 122 x 90 mm (L x W x H) Device for 2 heating circuits: 220 x 120 x 90 mm (L x W x H) Capillary tube: up to 5000 mm OD sensor line: 1.5 mm min. bend radius: 5 mm sensor bulb diameter: 4 to 6 mm |
Material | Enclosure: polyester sensor material: stainless steel S/S 1.4571 |
Weight | approx. 400 g |
Temperature range | -20 °C to +300 °C (mechanical) |
Current | Switching current at 230 V open contact: 16 A (AC-1) closed contact: 2.5 A (AC-1) |
Connection | Device for 1 heating circuit Terminals: 4 x 2.5 mm² + 1 PE Heating cable connections: 2 x M25 Device for 2 heating circuits Terminals: 6 x 2.5 mm² + 2 PE Heating cable connections: 2 x M25 |
Ambient temperature | -55 °C to +50 °C |
Explosion Protection
Marking | Ex II 2G Ex de IIC T6, T5 |
Certification | EPS 11 ATEX 1356 X Chinese NEPSI GYJ11.1611 Russian TC RU C-DE.GB06.B.00399 |
- General Info
-
Description
The STW II is a compact ON/OFF type capillary tube thermostat, housed in an Ex e certified polyester enclosure. Heaters, fans, motors and other equipment are energised and de-energised by means of this thermostat when specific temperature ranges are exceeded. This device can also be used to control the temperature in air or on various surfaces.
Function
Any change in temperature at the sensor bulb causes a change in the volume of fluid in the measuring system, which in turn results in a movement of the diaphragm membrane. This membrane is connected to a mechanical device that activates a microswitch. If the temperature at the sensor bulb exceeds the pre-set value, terminals 1 and 4 are opened. If there is a rupture or break in the sensor tube (leakage), then the switch remains permanently open (fail-safe). If the temperature falls below the minimum setting, the autocontrol opens the circuit but closes again on temperature rise.
- Technical Data
-
Technical Data
Protection Class IP 65 (EN 60592) Dimention Device for 1 heating circuit: 120 x 122 x 90 mm (L x W x H)
Device for 2 heating circuits: 220 x 120 x 90 mm (L x W x H)
Capillary tube: up to 5000 mm
OD sensor line: 1.5 mm
min. bend radius: 5 mm
sensor bulb diameter: 4 to 6 mmMaterial Enclosure: polyester
sensor material: stainless steel S/S 1.4571Weight approx. 400 g Temperature range -20 °C to +300 °C (mechanical) Current Switching current at 230 V
open contact: 16 A (AC-1)
closed contact: 2.5 A (AC-1)Connection Device for 1 heating circuit
Terminals: 4 x 2.5 mm² + 1 PE
Heating cable connections: 2 x M25
Device for 2 heating circuits
Terminals: 6 x 2.5 mm² + 2 PE
Heating cable connections: 2 x M25Ambient temperature -55 °C to +50 °C - Explosion Protection
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Explosion Protection
Marking Ex II 2G Ex de IIC T6, T5 Certification EPS 11 ATEX 1356 X
Chinese NEPSI GYJ11.1611
Russian TC RU C-DE.GB06.B.00399 - Download