GRF111 GRF121
GRF111 GRF121

Circulation unit


The ESBE series GRF100 is a circulation mixing unit which is intended for heating circulations where the flow and temperature control are required. Equipped with two shut-off valves with thermometers, check valve and high class isolation shell. The GRF100 is delivered with the 3-way rotary progressive mixing valve, which ensures low oversizing risk and best regulation performances independent from flow rate. 

The ESBE Circulation Unit GRF100 is ready to work with 180mm pumps. The smart adjustable insulation shell makes it sure that any kind of pump will be isolated in a right way. Choose the best system control and select one of the actuators or controllers from ESBE program.

  • Perfect control thanks to progressive valve characteristic
  • 180mm pump ready – be free to use favorite pump manufacturer
  • Control the system manually, via actuator or even controller
  • High class, adjustable insulation shell

Product range

GRF11x front_B-01
GRF11x side_B-01
GRF12x front_B-01
GRF12x side_B-01
Series GRF100 IConnection JWeight kgNoteNTCNTC = National Trade Code
61240100GRF11125G 1"G 1½"3.8  
61241100GRF12125G 1"G 1½"4.2230V, 3 point control signal ARA661 

Installation support

Installation examples
Installation instruction GRF100

Technical data

Technical data
Pressure class: PN 6 
Media temperature, max.: +110 °C
min.: 0 °C
Ambient temperature, max.:  °C
min.:  °C
(depends on the electronic equipment)  
Working pressure: 0.6 MPa
Connections, Internal thread (G): ISO 228/1 
External thread (G): ISO 228/1 
Insulation: EPP λ 0.036 W/mK 
Media, Heating water  (in accordance with VDI2035) 
Water/Glycol mixtures, max. 50 %
(above 20% admixture, the pump data must be checked)  
Material, in contact with water: Components of: Brass, steel 
Sealings material of: PTFE, Aramid fibre, EPDM 
Conformity: PED 2014/68/EU, article 4.3 
The integrated Mixing valve: Max. differential pressure drop: 100 kPa
Close off pressure: 200 kPa
Leakrate in % of flow*: <0,05 %
* Differential pressure 100kPa (1 bar) 
Characteristics: See diagram 
The integrated Actuator, GRF121: Actuator type: ARA661 
Control signal: 3-point 
Power supply: 230 ± 10% V AC, 50Hz 
Power consumption: 5 VA
Running time 90°: 120 s
Enclosure rating: IP41 
Protection class: II 
Conformity CE_A-01
LVD 2014/35/EU
EMC 2014/30/EU
RoHS 2011/65/EU
EnEV 2014
Wiring, Actuator ARA661 ARA600 3point_A-01
The actuator should be preceded by a multi-pole contact breaker in the fixed installation.
Valve characteristics VRG430_RGB_GB_C-01
Characteristics GRF100_dimensioning_verA_en-01

Accessories and spare parts

Options trade codeNoteData sheetInstructions manual


Hydraulic separation for 1 circulation unit.
66001100GMA411Manifold GMA411 Manifold for 1 unit, with integrated hydraulic separator function.


Manifold for 2 circulation units, without integrated hydraulic separator function.
66001200GMA421Manifold GMA421 Manifold for 2 units.


Manifold for 3 circulation units, without integrated hydraulic separator function.
66001300GMA431Manifold GMA431 Manifold for 3 units.


Manifold for 4 circulation units, without integrated hydraulic separator function.
66001400GMA441Manifold GMA441 Manifold for 4 units.


Manifold for 5 circulation units, without integrated hydraulic separator function.
66001500GMA451Manifold GMA451 Manifold for 5 units.


Manifold for 2 circulation units, with integrated hydraulic separator function.
66001600GMA521Manifold GMA521 Manifold for 2 units, with integrated hydraulic separator function.


Manifold for 3 circulation units, with integrated hydraulic separator function.
66001700GMA531Manifold GMA531 Manifold for 3 units, with integrated hydraulic separator function.
Spare parts trade codeNoteData sheetInstructions manual


ESBE GSP903 Thermometer upgrade set, 2 pcs/package
67000600GSP903Thermometer upgrade set, 2 pcs/package    


ESBE GSP912 Adaptor kit VRG&ARA.
67000700GSP912ESBE valves series VRG and Actuators series ARA DN20-DN32  


ESBE GSP911 Ball valves incl thermometer DN 25, 2 pcs/package
67003400GSP911Ball valves incl thermometer DN 25, 2 pcs/package DN25  


ESBE GSP910 Insulation circulation unit FLEXI
67002000GSP910Insulation circulation unit FLEXI    

Download area

Find here direct related product information for download. If you don’t find your specific need here please look further into below mentioned "Quick links" or this website's “Search” and “Support” area.
Data sheet GRF100
Data sheet GRF100 (cs)
Installation instruction GRF100
Installation instruction GRF100 (si)
2D Image GRF111
2D Image GRF121
3D drawing (stp file) GRF111, DN25
3D drawing (stp file) GRF121, DN25

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GMA400, GMA500

Series GMA400 and GMA500 are manifolds for circulation units including insulation shell according to EnEV2014 and wall brackets

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