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LK 831 ThermoMix® B

LK 831 ThermoMix® B

  • Easy to adapt for right- or left-hand mounting
  • Suitable for motorization

LK 831 ThermoMix® B 4-way bivalent mixing valves are 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 extrac...

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LK 831 ThermoMix® B

  • Variants
  • Detailed Information
  • Documentation
  • Videos
  • Accessories & Spare parts
  • Questions & Answers

Variants

LK 831 - Compression fitting

LK 831 - 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
180591 22 mm 4,0 87 43.5 87 20 26 80 0.7

180591

Dim. 22 mm
Kvs m³/h 4,0
A mm 87
B mm 43.5
C mm 87
D mm 20
E mm 26
F mm 80
Weight (kg) 0.7
Dimensional sketch
Item list

Detailed Information

Description

LK 831 ThermoMix® B 4-way bivalent mixing valves are 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.

LK 831 ThermoMix® B should be equipped with an automatic control unit to ensure that the most favourable heat source is prioritised at all times.

The valve can be mounted at any angle. Valve ports are marked 1-4. The valve is to be mounted according to 1=Supply, 2=Return, 3=Secondary heat and 4=Primary heat.

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: 50 kPa ( 0.5 bar)
Leakage: < 1% of Kvs at 50 kPa
Angle of rotation: 90°
Torque: < 1 Nm
Media 1: Water - Glycol mixture max. 50% Ethanol mixture max. 30%
Material, valve body: Brass EN 12165 CW617N
Material, external cover: Brass EN 12165 CW617N
Material, slide/spindle: Brass EN 12164 CW614N
Material, sealing: EPDM
Spindle sealing: Two O-rings

Application

Technical Diagrams

Valve Characteristics

Capacity Diagram

Documentation

Product sheet

LK 831 ThermoMix® B

Instruction manual

831 ThermoMix - Instruction_148841

Certificate/Type approval

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

Accessories & Spare parts

Article no. Article Position
187059 Sealing kit 830/831, DN 15-20 1
187065 Repair kit 831, DN 20, Kvs 4.0 2

Videos

LK 831 ThermoMix®

Questions & Answers

Is the LK SmartComfort compatible with a mixing valve from another manufacturer?

Yes, we provide mounting kits for other models, see Mounting kits on our website.