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LK 821 ThermoVar®

LK 821 ThermoVar®

  • Position-independent

LK 821 ThermoVar® 3-way thermic zone valve is designed to change the direction of flow of the media in heating systems. The valve is controlled by the temperature of the media. With an LK 821 ThermoVar® install...

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LK 821 ThermoVar®

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

Variants

LK 821 - Female thread

LK 821 - Female thread 4 variants

Article Opening temp. °C Dim. Kvs m³/h A mm B mm C mm D mm E mm Weight (kg) Dimensional sketch Item List
180540 45 F ¾" 6,0 80 40 66 21 35 0.8
180541 45 F1" 9,0 82 41 67 21 35 0.9
180549 55 F 1" 9,0 82 41 67 21 35 0.9
180573 72 F 1" 9,0 82 41 67 21 35 0.9

180540

Opening temp. °C 45
Dim. F ¾"
Kvs m³/h 6,0
A mm 80
B mm 40
C mm 66
D mm 21
E mm 35
Weight (kg) 0.8
Dimensional sketch
Item list

180541

Opening temp. °C 45
Dim. F1"
Kvs m³/h 9,0
A mm 82
B mm 41
C mm 67
D mm 21
E mm 35
Weight (kg) 0.9
Dimensional sketch
Item list

180549

Opening temp. °C 55
Dim. F 1"
Kvs m³/h 9,0
A mm 82
B mm 41
C mm 67
D mm 21
E mm 35
Weight (kg) 0.9
Dimensional sketch
Item list

180573

Opening temp. °C 72
Dim. F 1"
Kvs m³/h 9,0
A mm 82
B mm 41
C mm 67
D mm 21
E mm 35
Weight (kg) 0.9
Dimensional sketch
Item list

Other temperatures and dimensions on request.

LK 821 - Male thread

LK 821 - Male thread 2 variants

Article Opening temp. °C Opening temp. °F Dim. Kvs m³/h A mm B mm C mm D mm E mm Weight (kg) Dimensional sketch Item List
180544 45 113 M 1" 6,0 80 40 66 21 35 0.8
180578 72 162 M 1½" 12,0 84 42 68 24 39 1.0

180544

Opening temp. °C 45
Opening temp. °F 113
Dim. M 1"
Kvs m³/h 6,0
A mm 80
B mm 40
C mm 66
D mm 21
E mm 35
Weight (kg) 0.8
Dimensional sketch
Item list

180578

Opening temp. °C 72
Opening temp. °F 162
Dim. M 1½"
Kvs m³/h 12,0
A mm 84
B mm 42
C mm 68
D mm 24
E mm 39
Weight (kg) 1.0
Dimensional sketch
Item list

Other temperatures and dimensions on request.

Detailed Information

Description

LK 821 ThermoVar® 3-way thermic zone valve is designed to change the direction of flow of the media in heating systems. The valve is controlled by the temperature of the media. With an LK 821 ThermoVar® installed in, for example, a solar heating system an optimal stratification in the storage tank is obtained.

LK 821 can be equipped with an insulation - see under ­Accessories. For more information, please see the product sheet for insulations.

The valve can be mounted at any angle. LK 821 ThermoVar® can easily be adapted for right- or left-hand mounting.

Technical Data

Opening temperature: 45 °C, 55 °C, 61 °C, 66 °C, 72 °C or 80 °C
Working temperature: (45 - 55 °C) Min. 5 °C/Max. 95 °C
(61 - 80 °C) Min. 5 °C/Max. 110 °C
Ambient temperature: Min. 5 °C/Max. 60 °C
Max. working pressure: 1.0 MPa (10 bar)
Max. differential pressure: 50 kPa (0.5 bar)
Media 1: Water - Glycol mixture max. 50%
Thread standard: Rp - female thread, G - male thread
Material, valve body: Brass EN 12165 CW617N
Material, external cover: Brass EN 12165 CW617N
Material, sealing: EPDM

Application

Technical Diagrams

Capacity Diagram

Documentation

Product sheet

LK 821 ThermoVar®

Instruction manual

821 ThermoVar - Instruction_048316

Instruction manual

Insulation 820, 821, 822, 840, 841 - Instruction_148693

Certificate/Type approval

CE Declaration of Conformity - 820, 821, 823, 825.pdf

Applications

Solar heating ENG

Accessories & Spare parts

Article no. Article Position
187031 Thermostatic element 821, 45 °C 1
187032 Thermostatic element 821, 55 °C 1
187033 Thermostatic element 821, 61 °C 1
187034 Thermostatic element 821, 66 °C 1
187035 Thermostatic element 821, 72 °C 1
187036 Thermostatic element 821, 80 °C 1
187107 Insulation, DN 15-20 2
187108 Insulation, DN 25-32 2