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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

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LK 841 ThermoMix® 2.0

LK 841 ThermoMix® 2.0

  • Octagonal key grip
  • Compact design
  • Low internal leakage

LK 841 ThermoMix® 2.0 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 841 ThermoMix® 2.0

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

Variants

LK 841 2.0 - Female thread

LK 841 2.0 - Female thread 5 variants

Article Dim. Kvs m³/h A mm B mm C mm D mm E mm F mm Weight (kg) Dimensional sketch Item List
181940 F ½" 2,5 70 35 70 18 29 81 0.7
181941 F ¾" 4,0 70 35 70 18 29 81 0.5
181942 F ¾" 6,3 70 35 70 18 29 81 0.5
181943 F 1" 10,0 70 35 70 20 29 83 0.5
181944 F 1¼" 16,0 84 42 84 24 32 90 0.8

181940

Dim. F ½"
Kvs m³/h 2,5
A mm 70
B mm 35
C mm 70
D mm 18
E mm 29
F mm 81
Weight (kg) 0.7
Dimensional sketch
Item list

181941

Dim. F ¾"
Kvs m³/h 4,0
A mm 70
B mm 35
C mm 70
D mm 18
E mm 29
F mm 81
Weight (kg) 0.5
Dimensional sketch
Item list

181942

Dim. F ¾"
Kvs m³/h 6,3
A mm 70
B mm 35
C mm 70
D mm 18
E mm 29
F mm 81
Weight (kg) 0.5
Dimensional sketch
Item list

181943

Dim. F 1"
Kvs m³/h 10,0
A mm 70
B mm 35
C mm 70
D mm 20
E mm 29
F mm 83
Weight (kg) 0.5
Dimensional sketch
Item list

181944

Dim. F 1¼"
Kvs m³/h 16,0
A mm 84
B mm 42
C mm 84
D mm 24
E mm 32
F mm 90
Weight (kg) 0.8
Dimensional sketch
Item list

Other dimensions on request.

LK 841 2.0 - Female thread

LK 841 2.0 - Female thread 2 variants

Article Dim. Kvs m³/h A mm B mm C mm D mm E mm F mm Weight (kg) Dimensional sketch Item List
181945 F 1½" 25,0 106 53 106 33 43 110 1.6
181946 F 2" 40,0 106 53 106 33 43 110 1.7

181945

Dim. F 1½"
Kvs m³/h 25,0
A mm 106
B mm 53
C mm 106
D mm 33
E mm 43
F mm 110
Weight (kg) 1.6
Dimensional sketch
Item list

181946

Dim. F 2"
Kvs m³/h 40,0
A mm 106
B mm 53
C mm 106
D mm 33
E mm 43
F mm 110
Weight (kg) 1.7
Dimensional sketch
Item list

Other dimensions on request.

LK 841 2.0 - Male thread

LK 841 2.0 - Male thread 1 artikel

Article Dim. Kvs m³/h A mm B mm C mm D mm E mm F mm Weight (kg) Dimensional sketch Item List
181949 M 1" 6,3 80 40 80 18 29 81 0.5

181949

Dim. M 1"
Kvs m³/h 6,3
A mm 80
B mm 40
C mm 80
D mm 18
E mm 29
F mm 81
Weight (kg) 0.5
Dimensional sketch
Item list

Other dimensions on request.

LK 841 2.0 - Compression Fitting

LK 841 2.0 - Compression Fitting 1 artikel

Article Dim. Kvs m³/h A mm B mm C mm D mm E mm F mm Weight (kg) Dimensional sketch Item List
181986 22 mm 2,5 114 57 114 18 29 81 0.9

181986

Dim. 22 mm
Kvs m³/h 2,5
A mm 114
B mm 57
C mm 114
D mm 18
E mm 29
F mm 81
Weight (kg) 0.9
Dimensional sketch
Item list

Other dimensions on request.

Detailed Information

Description

LK 841 ThermoMix® 2.0 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.

The valve is suitable for motorization and can be fitted with insulation. For more information, see the insulation data sheet.

A compact design and a octagonal key grip gives an easier access and installation in tight spaces. The valve can be installed in any position and LK 841 ThermoMix® 2.0 can easily be adapted for right- or left-hand mounting.

The valve requires no maintenance but the installation should be
checked regularly.

Technical Data

Working temperature: Min. 5 °C/Max. 110 °C (120 °C briefly)
Ambient temperature: Min. 5 °C/Max. 60 °C
Max. working pressure: 1.0 MPa (10 bar)
Max. differential pressure: 100 kPa (1 bar)
Leakage: < 1.5% of Kvs at 50 kPa
Angle of rotation: 90°/360°
Torque: < 1 Nm
Media 1: Water - Glycol mixture max. 50% Ethanol mixture max. 30%
Thread standard: Rp - female thread, G - male thread
Material, valve body: Brass EN 12165 CW617N
Material, internal cover: PPS Composite
Material, slide/spindle: Brass EN 12165 CW617N
Other data: Material, external cover: Aluminium DN 15-32, Composite DN 40-50
Spindle sealing: Two O-rings
Material, sealing: EPDM

Application

Technical Diagrams

Valve Characteristics

CAPACITY DIAGRAM

Documentation

Product sheet

LK 841 ThermoMix® 2.0

Brochure

Mixing Valves LK 840 & LK 841

Instruction manual

841 ThermoMix 2_0 - Instruction_248061

Instruction manual

841 ThermoMix DN 40_50 - Instruction_248062

Certificate/Type approval

CE Declaration of Conformity - 830, 831, 840, 841, 842, 845, 846.pdf

Accessories & Spare parts

Article no. Article Position
187187 Sealing kit LK 840/841 DN 15-20 1
187188 Sealing kit LK 840/841 DN 25 1
187197 Sealing kit 840/841 2.0, DN 32 1
187194 Repair kit 841 2.0, DN 15-20 2
187195 Repair kit 841 2.0, DN 25 2
187198 Repair kit 841 2.0, DN 32 2
187189 Sealing kit 840/841 2.0, DN 40-50 3
187196 Repair kit 841 2.0, DN 40-50 4
187107 Insulation, DN 15-20 5
187108 Insulation, DN 25-32 5