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    LK Armatur is a leading producer in Europe, manufactures millions of valves per year for the global HVAC market. Our solutions are based on a comprehensive view of how valves, control units, components and prefabricated products work together. Svenska English Deutsch Italiano Yкраїнська Suomi

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    LK Systems is the leading manufacturer of easy-to-install systems for heating and tap water distribution and pre-insulated pipes in the Nordics. Through our prefabrication factory, we also provide tailor-made solutions that simplify the installation process even further. Svenska English Norsk Suomi

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    Our PEX Pipe Extrusion business area is an innovative manufacturer of high-quality plastic pipes for the heating and plumbing industry. Our core is the efficient, high-technology production process for crosslinked PE-Xa pipes, resulting in products with a unique combination of flexibility and hydrostatic strength. English

  • LK Group

    LK is a family-owned trading and production group, operating on a global scale within the HVAC-area. We are the market leader in Sweden and has an increasing sales of products, systems and solutions in the Nordic countries, Europe and the USA. Svenska English
LK HydronicGroup H 125 DN 25

LK HydronicGroup H 125 DN 25

  • Complete insulated unit for easy installation
  • 1" female thread and 1½" male thread for flexible installation
  • Easy to combine with electronic regulation

LK HydronicGroup H 125 DN 25 is a complete pump group that is suitable for heating where direct supply or mixed supply is desirable. Consists of a highly efficient circulation pump, insulation, wall mounting br...

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LK HydronicGroup H 125 DN 25

  • Variants
  • Detailed Information
  • Documentation
  • Accessories & Spare parts
  • Discover More

Variants

LK 866 H 125 DN 25 - 4-way mixing valve, LK 841

LK 866 H 125 DN 25 - 4-way mixing valve, LK 841 2 variants

LK 866 - Pump group with a four way mixing valve, LK 841 ThermoMix®

Article Type Dim. Kvs m³/h Circulating Pumps Weight (kg) Item List
299747 Right M 1½" / F 1" x M 1" 6.3 Wilo Para 15-130/8-75/SC-9 5.3
299964 M 1½" / F 1" x M 1" 6.3 Without pump 3.1

299747

Type Right
Dim. M 1½" / F 1" x M 1"
Kvs m³/h 6.3
Circulating Pumps Wilo Para 15-130/8-75/SC-9
Weight (kg) 5.3
Item list

299964

Type
Dim. M 1½" / F 1" x M 1"
Kvs m³/h 6.3
Circulating Pumps Without pump
Weight (kg) 3.1
Item list
LK 861 H 125 DN 25 - Direct supply

LK 861 H 125 DN 25 - Direct supply 3 variants

Article Dim. Circulating Pumps Weight (kg) Type Item List
299460 M 1½" / F 1" x M 1½" Without pump 3.1
299458 M 1½" / F 1" x M 1½" Wilo Para 25-180/6-43/SC-12 5 Right
299459 M 1½" / F 1" x M 1½" Wilo Para 25-180/8-75/SC-12 5.2 Right

299460

Dim. M 1½" / F 1" x M 1½"
Circulating Pumps Without pump
Weight (kg) 3.1
Type
Item list

299458

Dim. M 1½" / F 1" x M 1½"
Circulating Pumps Wilo Para 25-180/6-43/SC-12
Weight (kg) 5
Type Right
Item list

299459

Dim. M 1½" / F 1" x M 1½"
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 5.2
Type Right
Item list
LK 862 H 125 DN 25 - Mixed supply

LK 862 H 125 DN 25 - Mixed supply 8 variants

Article Type Dim. Kvs m³/h Circulating Pumps Weight (kg) Item List
299461 Left M 1½" / F 1" x M 1½" 6.3 Wilo Para 25-180/6-43/SC-12 5.3
299463 Left M 1½" / F 1" x M 1½" 10.0 Wilo Para 25-180/8-75/SC-12 5.5
299465 M 1½" / F 1" x M 1½" 6.3 Without pump 3.1
299466 M 1½" / F 1" x M 1½" 10.0 Without pump 3.1
299462 Right M 1½" / F 1" x M 1½" 6.3 Wilo Para 25-180/6-43/SC-12 5.3
299464 Right M 1½" / F 1" x M 1½" 10.0 Wilo Para 25-180/8-75/SC-12 5.5
396164 Right
LK 950 (180759) 		M 1½" / F 1" x M 1½" 6.3 Wilo Para 25-180/6-43/SC-12 5.8
396165 Right
LK 950 (180759) 		M 1½” / F 1” x M 1½” 10.0 Wilo Para 25-180/8-75/SC-12 6

299461

Type Left
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 6.3
Circulating Pumps Wilo Para 25-180/6-43/SC-12
Weight (kg) 5.3
Item list

299463

Type Left
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 10.0
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 5.5
Item list

299465

Type
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 6.3
Circulating Pumps Without pump
Weight (kg) 3.1
Item list

299466

Type
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 10.0
Circulating Pumps Without pump
Weight (kg) 3.1
Item list

299462

Type Right
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 6.3
Circulating Pumps Wilo Para 25-180/6-43/SC-12
Weight (kg) 5.3
Item list

299464

Type Right
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 10.0
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 5.5
Item list

396164

Type Right
LK 950 (180759)
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 6.3
Circulating Pumps Wilo Para 25-180/6-43/SC-12
Weight (kg) 5.8
Item list

396165

Type Right
LK 950 (180759)
Dim. M 1½” / F 1” x M 1½”
Kvs m³/h 10.0
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 6
Item list
LK 863 H 125 DN 25 - Thermic mixing valve

LK 863 H 125 DN 25 - Thermic mixing valve 5 variants

Article Type Operating Temperature Dim. Circulating Pumps Weight (kg) Item List
299467 Right 25 - 45 °C M 1½" / F 1" x M 1½" Wilo Para 25-180/6-43/SC-12 5.8
299468 Right 25 - 45 °C M 1½" / F 1" x M 1½" Wilo Para 25-180/8-75/SC-12 6
396243 Right 50 - 70 °C M 1½” / F 1” x M 1½” Wilo Para 25-180/8-75/SC-12 6
299469 25 - 45 °C M 1½" / F 1" x M 1½" Without pump 4
396507 50 - 70 °C M 1½” / F 1” x M 1½” Without pump 4

299467

Type Right
Operating Temperature 25 - 45 °C
Dim. M 1½" / F 1" x M 1½"
Circulating Pumps Wilo Para 25-180/6-43/SC-12
Weight (kg) 5.8
Item list

299468

Type Right
Operating Temperature 25 - 45 °C
Dim. M 1½" / F 1" x M 1½"
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 6
Item list

396243

Type Right
Operating Temperature 50 - 70 °C
Dim. M 1½” / F 1” x M 1½”
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 6
Item list

299469

Type
Operating Temperature 25 - 45 °C
Dim. M 1½" / F 1" x M 1½"
Circulating Pumps Without pump
Weight (kg) 4
Item list

396507

Type
Operating Temperature 50 - 70 °C
Dim. M 1½” / F 1” x M 1½”
Circulating Pumps Without pump
Weight (kg) 4
Item list
LK 864 H 125 DN 25 - Thermic loading valve

LK 864 H 125 DN 25 - Thermic loading valve 5 variants

Article Type Opening temp. Opening temp. Dim. Kvs m³/h Circulating Pumps Weight (kg) Item List
299470 Right 55 °C - 70 °C 55 M 1½" / F 1" x M 1½" 9.0 Wilo Para 25-180/6-43/SC-12 5.7
299471 Right 55 °C - 70 °C 55 M 1½" / F 1" x M 1½" 9.0 Wilo Para 25-180/8-75/SC-12 5.9
299787 Right 45 °C - 60 °C 45 M 1½" / F 1" x M 1½" 9.0 Wilo Para 25-180/6-43/SC-12 5.7
299788 Right 45 °C - 60 °C 45 M 1½" / F 1" x M 1½" 9.0 Wilo Para 25-180/8-75/SC-12 5.9
299962 55 °C - 70 °C 55 M 1½” / F 1” x M 1½” 9.0 Without pump 3.5

299470

Type Right
Opening temp. 55 °C - 70 °C
Opening temp. 55
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 9.0
Circulating Pumps Wilo Para 25-180/6-43/SC-12
Weight (kg) 5.7
Item list

299471

Type Right
Opening temp. 55 °C - 70 °C
Opening temp. 55
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 9.0
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 5.9
Item list

299787

Type Right
Opening temp. 45 °C - 60 °C
Opening temp. 45
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 9.0
Circulating Pumps Wilo Para 25-180/6-43/SC-12
Weight (kg) 5.7
Item list

299788

Type Right
Opening temp. 45 °C - 60 °C
Opening temp. 45
Dim. M 1½" / F 1" x M 1½"
Kvs m³/h 9.0
Circulating Pumps Wilo Para 25-180/8-75/SC-12
Weight (kg) 5.9
Item list

299962

Type
Opening temp. 55 °C - 70 °C
Opening temp. 55
Dim. M 1½” / F 1” x M 1½”
Kvs m³/h 9.0
Circulating Pumps Without pump
Weight (kg) 3.5
Item list
LK 865 H 125 DN 25 - HWC

LK 865 H 125 DN 25 - HWC 2 variants

Article Type Opening temp. Opening temp. Dim. Circulating Pumps Weight (kg) Item List
299472 Right 35 °C - 65 °C 35 F 1" x M 1" Wilo Para zKu 15-130/8 SC 4.9
299963 35 °C - 65 °C 35 F 1" x M 1" Without pump 2.7

299472

Type Right
Opening temp. 35 °C - 65 °C
Opening temp. 35
Dim. F 1" x M 1"
Circulating Pumps Wilo Para zKu 15-130/8 SC
Weight (kg) 4.9
Item list

299963

Type
Opening temp. 35 °C - 65 °C
Opening temp. 35
Dim. F 1" x M 1"
Circulating Pumps Without pump
Weight (kg) 2.7
Item list
LK 867 H 125 DN 25 - 4-way mixing valve, LK 830

LK 867 H 125 DN 25 - 4-way mixing valve, LK 830 2 variants

Article Dim. Kvs m³/h Circulating Pumps Weight (kg) Type Item List
299965 M 1½" / F 1" x M 1" 6.3 Without pump 3.1
299765 M 1½" / F 1" x M 1" 6.3 Wilo Para 15-130/8-75/SC-9 5.3 Right

299965

Dim. M 1½" / F 1" x M 1"
Kvs m³/h 6.3
Circulating Pumps Without pump
Weight (kg) 3.1
Type
Item list

299765

Dim. M 1½" / F 1" x M 1"
Kvs m³/h 6.3
Circulating Pumps Wilo Para 15-130/8-75/SC-9
Weight (kg) 5.3
Type Right
Item list
LK 860 H 125 DN 25 - Manifold

LK 860 H 125 DN 25 - Manifold 6 variants

Article Type Dim. Note Weight (kg) Item List
182419 Manifold, 1 pc groups with hydraulic separator M 1½" 0.4 MPa (4 bar) 3.5
182350 Manifold, 2 pc groups with hydraulic separator M 1½" 0.4 MPa (4 bar) 7
182349 Manifold, 3 pc groups, without hydraulic separator M 1½" 0.4 MPa (4 bar) 8
182351 Manifold, 3 pc groups, with hydraulic separator M 1½" 0.4 MPa (4 bar) 9
182417 Manifold, 4 pc groups, without hydraulic separator M 1½" 0.4 MPa (4 bar) 9
182418 Manifold, 4 pc groups, with hydraulic separator M 1½" 0.4 MPa (4 bar) 10

182419

Type Manifold, 1 pc groups with hydraulic separator
Dim. M 1½"
Note 0.4 MPa (4 bar)
Weight (kg) 3.5
Item list

182350

Type Manifold, 2 pc groups with hydraulic separator
Dim. M 1½"
Note 0.4 MPa (4 bar)
Weight (kg) 7
Item list

182349

Type Manifold, 3 pc groups, without hydraulic separator
Dim. M 1½"
Note 0.4 MPa (4 bar)
Weight (kg) 8
Item list

182351

Type Manifold, 3 pc groups, with hydraulic separator
Dim. M 1½"
Note 0.4 MPa (4 bar)
Weight (kg) 9
Item list

182417

Type Manifold, 4 pc groups, without hydraulic separator
Dim. M 1½"
Note 0.4 MPa (4 bar)
Weight (kg) 9
Item list

182418

Type Manifold, 4 pc groups, with hydraulic separator
Dim. M 1½"
Note 0.4 MPa (4 bar)
Weight (kg) 10
Item list

Detailed Information

Description

LK HydronicGroup H 125 DN 25 is a complete pump group that is suitable for heating where direct supply or mixed supply is desirable. Consists of a highly efficient circulation pump, insulation, wall mounting bracket and two ball valves with thermometer, on the return side there is an integrated check valve.

LK 860 H 125 DN 25
Manifold available with or without hydraulic separator for one, two, three optionally four pump groups. Wall mounting bracket are included with the manifold.

LK 861 H 125 DN 25
Pump group where direct supply is desired.

LK 862 H 125 DN 25
Pump group where mixed supply is desired, a three-way mixing valve, LK 840 ThermoMix®, is included.

LK 863 H 125 DN 25
Pump group where mixed supply is desired, a thermic mixing valve is included. The LK 551 HydroMix has a thermostatic element that regulates the supply and return to achieve the desired supply temperature.

LK 864 H 125 DN 25
Pump group with a thermic loading valve LK 823 ThermoVar®. The pump group is intended to ensure both an optimal temperature stratification in the storge tank and high return temperature to the boiler, thus increasing the efficiency of the system.

LK 865 H 125 DN 25
A complete unit for hot water circulation. Consists of a mixing valve, cross, circulation pump, insulation, connection kit and three check valves. The LK 551 HydroMix mixing valve has a thermostatic element that regulates the supply of both cold and hot water to the desired temperature. The valve has an anti-scald function that closes for incoming hot water if the cold water supply ceases.

LK 866 H 125 DN 25
Pump group with a four way mixing valve, LK 841 ThermoMix®. The pumpgroup is designed for heating systems where a high return temperature is required to prevent corrosion and thus extend the life length of the heat source.

LK 867 H 125 DN 25
Pump group with a four way mixing valve, LK 830 ThermoMix® B. The pump group has a 4-way bivalent mixing valve that is designed for heating systems, where energy is taken from two heating units connected in series or parallel or for storage tank systems where energy is extracted from two levels. The pump group should be equipped with an automatic control unit to ensure that the most favourable heat source is prioritised at all times.

Technical Data

Voltage: 230 VAC, 50/60 Hz
Power consumption: 10-75 W depending on pump speed
Max. working pressure: 1.0 MPa (10 bar)
Working temperature: Min. 5 °C/Max. 95 °C
Ambient temperature: Min. 5 °C/Max. 58 °C
Thread standard: Rp - female thread, G - male thread
Media: Water - Glycol mixture max. 50%
Circulating pumps: Wilo Para 15-130/8-75/SC-9, Wilo Para 25-180/6-43/SC-12, Wilo Para 25-180/8-75/SC-12, Wilo Para zKu 15-130/8 SC, EEI ≤ 0.23 (see pump datasheet/label for exact value)
Material, valve body: Brass EN 12165 CW617N
Material, insulation: Expanded Polypropylene EPP

Application

LK HydronicGroup H 125 DN 25

LK 861 - Pump group with direct supply

LK HydronicGroup H 125 DN 25

LK 862 - Pump group with mixing valve

LK HydronicGroup H 125 DN 25

LK 863 - Pump group with mixing valve
LK 551 HydroMix

LK HydronicGroup H 125 DN 25

LK 864 - Pump group with thermic loading valve
LK 823 ThermoVar®

LK HydronicGroup H 125 DN 25

LK 865 - Complete unit for hot water circulation

LK HydronicGroup H 125 DN 25

LK 866 - Pump group with a four way mixing valve,
LK 841 ThermoMix®

LK HydronicGroup H 125 DN 25

LK 867 - Shuntgrupp med en fyrvägs shuntventil,
LK 830 ThermoMix® B

LK HydronicGroup H 125 DN 25

LK 861 Right - LK 861 Left

Technical Diagrams

LK HydronicGroup H 125 DN 25

LK 861 - Pump characteristics

LK HydronicGroup H 125 DN 25

LK 862 - Pump characteristics

LK HydronicGroup H 125 DN 25

LK 863 - Pump characteristics

LK HydronicGroup H 125 DN 25

LK 864 - Pump characteristics

LK HydronicGroup H 125 DN 25

LK 865 - Pump characteristics

LK HydronicGroup H 125 DN 25

LK 866 & LK 867 - Pump characteristics

Documentation

Product sheet

LK HydronicGroup H 125 DN 25

Instruction manual

860 HydronicGroup 125 - Instruction_248345

Instruction manual

861-862 HydronicGroup 125_GF_Alpha - Instruction_248408

Instruction manual

861-862 HydronicGroup 125_GF_UPM3 - Instruction_248331

Instruction manual

861-863 HydronicGroup H 125 - Instruction_248184

Instruction manual

864 HydronicGroup H 125_with pump - Instruction_248185

Instruction manual

864 HydronicGroup 125_without pump - Instruction_248330

Instruction manual

865 HydronicGroup H 125 - Instruction_248186

Instruction manual

866 HydronicGroup 125_with pump - Instruction_248321

Instruction manual

866 HydronicGroup H 125_without pump- Instruction_299747

Instruction manual

867 HydronicGroup H 125_with pump - Instruction_248320

Brochure

Pump Groups_ENG

Instruction manual

861-862 LK HydronicGroup H/C 125 - Instruction_248405

Certificate/Type approval

CE Declaration of Conformity - LK HydronicGroup H 90, H 125, H/C 125

Accessories & Spare parts

Article no. Article Position
187322 Wilo Para 25-180/6-43/SC-12 1
187227 Wilo Para 15-130/8-75/SC-9 1
187346 Wilo Para zKu 15-130/8 SC 1
187323 Ball Valve, blue 2
187324 Ball Valve, red 2
187325 Bracket 3
187326 EPP Insulation 4
180588 LK 830 Mixing Valve (867), Kvs 6.3 5
182766 LK 840 ThermoMix® HG Kvs 6,3 5
182767 LK 840 ThermoMix® HG Kvs 10 5
181949 LK 841 Mixing Valve (866), Kvs 6.3 5
187188 Sealing kit 840/841 DN 25 6
187062 Repair kit 830, DN 15-20, Kvs 6.3 7
187195 Repair kit 841 2.0, DN 25 7
095349 Repair kit 551, 25 - 45 °C, Kvs 3.2-4.2 8
095350 Repair kit 551, 35 - 65 °C, Kvs 3.2-4.2 8
187330 Repair Kit 823R 9
182431 LK 551 (863), 25 - 45 °C 10
182820 LK 551 (863), 50 - 70 °C 10
182389 LK 823R (864), 55 - 70 °C 11
182447 LK 823R (864), 45 - 60 °C 11