Circulation unit, Mixing function
GRA300
- Outstanding flow control thanks to the progressive characteristic of the valve
- Ready to use with most controllers available on the market
- High class insulation shell
- Compact design
- "Quick fit" connection between Valve and Actuator
The ESBE series GRA300 is a circulation mixing unit which is intended for heating circulations where the outstanding flow and temperature control are required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and high efficiency circulation pump. This compact unit is equipped with 3-way rotary progressive mixing valve and actuator.
The Circulation Mixing Unit ensures best regulation performances independent from flow rate and low oversizing risk thanks to progressive valve characteristic, as well as the working possibility with most controllers available on the market.
Product range
GRA311
| Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
| 61043100 | GRA311 | 20 | Wilo 15/7,5 | G ¾" | G 1" | 4,5 |
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: | <0,21 |
| 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.: | +110 °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, Cast iron, Steel Sealing materials: PTFE, Aramid fibre, EPDM |
Integrated pump
| Wilo RSTG 15/7,5 | |
| Power supply | 230 ± 10% V AC, 50/60 Hz |
| Power consumption | 4 — 75 W |
| Enclosure rating | IP X4D |
| Insulation class | F |
| EEI (Energy Efficiency Index), circulation pump | <0,21 |
Integrated valve
| ESBE VRG438, DN20-8 QF | |
| Pressure class | PN10 |
| Kvs | 8 |
| max. Differential pressure drop | 100 kPa (1 bar) |
| Close off pressure | 200 kPa (2 bar) |
| Leakrate in % of flow | <0,05%* |
| * | Differential pressure 100 kPa (1 bar) |
Integrated Actuator
| ESBE ARA661 Quick Fit | |
| Control signal | 3-point SPDT |
| Power supply | 230 ± 10% V AC, 50Hz |
| Power consumption | 5 VA |
| Running time 90° | 120 s |
| Enclosure rating | IP41 |
| Protection class | II |
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 | Data sheet | Instruction manual | |
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67003500 | GSP933 | ESBE GSP933 Ball valve DN 20 | DN20 |  |
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67000600 | GSP903 | ESBE GSP903 Thermometer upgrade set, 2 pcs/package | |
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67003300 | GSP933 | ESBE GSP933 Ball valves incl thermometer DN20 G¾", 2 pcs/package | DN20, G¾" | |
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67003800 | GSP933 | ESBE GSP933 Ball valves incl thermometer DN20 G1", 2 pcs/package | DN20, G1" | |
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67003000 | GSP930 | ESBE GSP930 Insulation circulation unit DN 20 | |
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67006100 | GSP961 | ESBE GSP961 Actuator ARA661 120s 230V 3p QF | |
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67000700 | GSP912 | ESBE GSP912 Adaptor kit VRG&ARA | Adaptor kit for ESBE valves series VRG and Actuators series ARA. DN20-DN32 | |
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67003100 | GSP931 | ESBE GSP931 Pump RSTG 15/7,5 Wilo | |
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67003900 | GSP932 | ESBE GSP932 PWM cable Wilo RSTG, 3m | |
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Options
| Art No. | Reference | Designation | Note | Data sheet | Instruction manual | |
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66000600 | GMA331 | ESBE GMA331 Manifold for 3 circulation units, without integrated hydraulic separator function. | DN20 | |
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66000500 | GMA321 | ESBE GMA321 Manifold for 2 circulation units, without integrated hydraulic separator function. | DN20 | |
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Download area
Download area
| Type | Preview | Download |
| Data sheet | GRA300 |
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| Installation instruction | GRA300 (en, pl, ru, sv) |
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| Installation instruction | GRA300 (de, en, es, fr, it, nl) |
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| Certificate | Declaration of Conformity, GRA300 |
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| Certificate | Declaration of Conformity UK CA, GRA300 |
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| Certificate | Building Product Declaration BPD3, GRA300 |
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| Certificate | EAC certificate (RU) |
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| Certificate | UKRSEPRO certificate (UA) |
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| Image | GRA311, high res |
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| 2D Image | GRA311 |
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| 3D drawing (stp file) | GRA311, DN20 |
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Related materials
Related products
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GMA300 | Series GMA300 is manifolds for 2 or 3 circulation units including insulation according to EnEV2014 and wall brackets. | Data sheet | Installation instruction |
Quick links
Quick links
| Movie: Circulation Units - Installation intro |