Return temperature unit, Thermostatic mixing function
GST100
- Thermostatic constant temperature control
- Available with fixed or adjustable temperature setting
- High class insulation shell
- High efficiency circulation pump
The ESBE series GST100 is a return temperature unit designed for applications, where a return temperature control is required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and high efficiency circulation pump. The GST100 is delivered with a 3-way thermostatic mixing valve, which comes in two versions: fixed temperature or adjustable temperature setting.
Product range
GST130, Fixed temperature setting
| Art.no. | Reference | DN | Pump | Temperature range [°C] | Connection I | Connection J | Weight [kg] | Note |
| 61120100 | GST131 | 25 | Wilo 25/6 | 50/55/60 | G 1" | G 1½" | 5,0 | The Return Temperature Units Series GST130 are delivered with three wax elements: 50/55/60ºC. Factory assembly: 55ºC. |
GST140, Adjustable temperature setting
| Art.no. | Reference | DN | Pump | Temperature range [°C] | Connection I | Connection J | Weight [kg] |
| 61120200 | GST141 | 25 | Wilo 25/6 | 50–75 | G 1" | G 1½" | 5,4 |
Installation support
Installation examples
Technical data
Technical data
| Pressure class: | PN 6 |
| Working pressure: | 0,6 MPa |
| Insulation: | EPP λ 0,036 W/mK |
| EEI (Energy Efficiency Index), circulation pump: | <0,20 |
| Media, Heating water: | (in accordance with VDI2035) |
| Media, Water/Glycol mixtures: | max. 50 % (above 20% admixture, the pump data must be checked) |
| Media, Water/Ethanol mixtures: | max. 28 % |
| Media temperature, max.: | +100 °C |
| Media temperature, min.: | 0 °C |
| Ambient temperature, max.: | +50 °C |
| Ambient temperature, min.: | 0 °C |
| Connections, Internal thread (G): | ISO 228/1 |
| Connections, External thread (G): | ISO 228/1 |
| Material, in contact with water |
Components: Brass, Iron, Steel Sealing materials: PTFE, Aramid fibre, EPDM |
Integrated pump
| Wilo Yonos Para 25/6-130 RKA | |
| Power supply | 230 ± 10% V AC, 50/60 Hz |
| Power consumption | 3 — 45 W |
| Enclosure rating | IP X4D |
| Insulation class | F |
| EEI (Energy Efficiency Index), circulation pump | <0,20 |
Integrated valve
| ESBE VTC317, DN20-3,2 55°C | |
| max. Differential pressure drop | 100kPa (1bar) |
| Opening temperature | 55 ± 2°C |
| Leakrate in % of flow | A-AB: Tight; B-AB: max. 3% of Kvs |
| Rangeability Kv/Kv min, A-AB | 100 |
EMC 2014/30/EU
RoHS3 2015/863/EU
PED 2014/68/EU, article 4.3
Dimensioning
Wiring
Accessories and Spare Parts
Spare parts
| Art No. | Reference | Designation | Note | Instruction manual | |
 |
67000600 | GSP903 | ESBE GSP903 Thermometer upgrade set, 2 pcs/package |  |
|
 |
57000200 | VTC931 | ESBE VTC931 Thermostat, 55°C | |
|
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57000300 | VTC931 | ESBE VTC931 Thermostat, 60°C | Load valve VTC317 | |
 |
67000100 | GSP901 | ESBE GSP901 Pump RKA 25/6 Wilo | DN25 | |
|
67000300 | GSP901 | ESBE GSP901 Pump RKA 25/7.5 Wilo | DN32 | |
 |
67000400 | GSP901 | ESBE GSP901 Pump UPM3 25-50 Grundfos | DN25 | |
|
67000500 | GSP907 | ESBE GSP907 Pump Grundfos Hybrid UPM3 25-70 | DN25-DN32 | |
Download area
Download area
| Type | Preview | Download |
| Data sheet | GST100 |
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| Installation instruction | GST100 (de, en, fr, it, pl, sv) |
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| Installation instruction | Wax element GST131 |
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| Installation instruction | GST100, Wilo Pump |
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| Certificate | Declaration of Conformity, GST100 |
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| Certificate | Declaration of Conformity UK CA, GST100 |
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| Certificate | Building Product Declaration BPD3, GST100 |
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| Certificate | EAC certificate (RU) |
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| Certificate | UKRSEPRO certificate (UA) |
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| Image | GST131, high res |
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| Image | GST141, high res |
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| 2D Image | GST131, GST141 |
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| 3D drawing (stp file) | GST131, DN25 |
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| 3D drawing (stp file) | GST141, DN25 |
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