Thermostatic three-way valve body

IMI Heimeier
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​​​​​​​ without presetting, with automatic bypass control The thermostatic three-way-valve bodies are used in two-pipe pump heating systems. For one-pipe pump heating systems a retrofitting thermostatic insert is available. When almost all valves are closed at the same time, additional pressures build up in the heating system. If the three-way valve intercepts the radiator flow, the bypass for the return flow is fully opened. Additional pressures are avoided and the pressure is kept almost constant. The bypass can be connected with the corresponding bypass T-piece on the radiator return.

To avoid additional differential pressure

Due to automatic bypass control

With bypass T-piece

For easy connection to the return

Double O-ring seal

For durable and maintenance free operation

Valve body in gunmetal

Corrosion-resistant and safe

Technical description

Applications:

Two-pipe or one-pipe pump heating systems.

Function:

Control
Shut-off
Avoids additional differential pressure
Ensuring minimum amounts of water circulation

Dimensions:

DN 15

Pressure class:

PN 10

Temperature:

Max. working temperature: 120°C, with protection cap or actuator 100°C.
Min. working temperature: -10°C.

Materials:

Valve body: corrosion resistant Gunmetal
Bypass T-piece: Brass
O-rings: EPDM rubber
Valve disc: EPDM rubber
Return spring: Stainless steel
Valve insert: Brass
Spindle: Niro-steel spindle with double O-ring sealing. The outer O-ring can be replaced under pressure.

Surface treatment:

Valve body and fittings are nickel-plated.

Marking:

THE and flow direction arrow. Black protection cap.

Pipe connection:

The valve body and the bypass T-piece are designed for connection to threaded pipe, or in conjunction with compression fittings, to copper precision steel or multi-layer pipe.

Connection to thermostatic head and actuator:

HEIMEIER M30x1,5

Articles

Thermostatic three-way valve body

Connection on the radiator left

Bypass connection
DN
D
d2
Kv Radiator
[xp] 1 K / 2 K 1)
Kv
total 2)
EAN
Article No
DN 15 (1/2")
Screwed nipple
15
Rp1/2
R1/2
0,38 / 0,73
1,45
4024052221714
4151-02.000

1) Distribution ratio at 2.0 K approx. 50%.
2) Total Kv-value for radiator and bypass.

*) SW1: 27mm, SW2: 30mm


Kvs = m3/h at a pressure drop of 1 bar and fully open valve.

Kv [xp] max. 1 K / 2 K = m3/h at a pressure drop of 1 bar with thermostatic head.

Thermostatic three-way valve body

Connection on the radiator right

Bypass connection
DN
D
d2
Kv Radiator
[xp] 1 K / 2 K 1)
Kv
total 2)
EAN
Article No
DN 15 (1/2")
Screwed nipple
15
Rp1/2
R1/2
0,38 / 0,73
1,45
4024052221615
4150-02.000

1) Distribution ratio at 2.0 K approx. 50%.
2) Total Kv-value for radiator and bypass.

*) SW1: 27mm, SW2: 30mm


Kvs = m3/h at a pressure drop of 1 bar and fully open valve.

Kv [xp] max. 1 K / 2 K = m3/h at a pressure drop of 1 bar with thermostatic head.

Bypass T-piece

Connection on the radiator left or right

Bypass connection
DN
D
d2
EAN
Article No
DN 15 (1/2")
Screwed nipple
15
Rp1/2
R1/2
4024052222117
4154-02.000

*) SW1: 27mm, SW2: 30mm

Accessories

Retrofit thermostatic insert

For the application of thermostatic three-way valve bodies in one-pipe heating systems.
The circuit flow rate is designed to be distributed to 35% radiator and 65% bypass.
Kv-value total 2,40 [m3/h] (with 2 K p-band).
Flow diagram on request.

EAN
Article No
4024052217410
4101-03.300

Compression fitting

for copper or precision steel pipe according to DIN EN 1057/10305-1/2.
Female thread connection Rp3/8 – Rp3/4.
Metal-to-metal joint.
Brass nickel-plated.
Support sleeves should be used for a pipe wall thickness of 0.8 – 1 mm. Follow the specifications of the pipe manufacturer.

Ø Pipe
DN
EAN
Article No
12
10 (3/8")
4024052174614
2201-12.351
14
15 (1/2")
4024052174713
2201-14.351
15
15 (1/2")
4024052175017
2201-15.351
16
15 (1/2")
4024052175116
2201-16.351
18
20 (3/4")
4024052175215
2201-18.351

Support sleeve

for copper or precision steel pipe with a 1 mm wall thickness.
Brass.

Ø Pipe
L
EAN
Article No
12
25,0
4024052127016
1300-12.170
15
26,0
4024052127917
1300-15.170
16
26,3
4024052128419
1300-16.170
18
26,8
4024052128815
1300-18.170

Compression fitting

for Alu/PEX multi-layer pipe according to DIN 16836.
Female thread connection Rp1/2.
Nickel-plated brass.

Ø Pipe
EAN
Article No
16 x 2
4024052138616
1335-16.351

Double connection fitting

For clamping plastic, copper, precision steel or multi-layer pipes.
Nickel-plated brass.

L
EAN
Article No
G3/4 x R1/2
26
4024052308415
1321-12.083

Compression fitting

for copper or precision steel pipe according to DIN EN 1057/10305-1/2.
Connection male thread G3/4 according to DIN EN 16313 (Eurocone).
Metal-to-metal joint.
Nickel-plated brass.
With a pipe wall thickness of 0.8-1 mm insert supporting sleeves. Heed pipe manufacturer’s technical advice.

Ø Pipe
EAN
Article No
12
4024052214211
3831-12.351
14
4024052214310
3831-14.351
15
4024052214617
3831-15.351
16
4024052214914
3831-16.351
18
4024052215218
3831-18.351

Compression fitting

for copper or precision steel pipe according to DIN EN 1057/10305-1/2 and stainless steel pipe.
Connection male thread G3/4 according to DIN EN 16313 (Eurocone).
Soft sealed, max. 95°C.
Nickel-plated brass.

Ø Pipe
EAN
Article No
15
4024052515851
1313-15.351
18
4024052516056
1313-18.351

Compression fitting

for plastic pipe according to DIN 4726, ISO 10508. PE-X: DIN 16892/16893, EN ISO 15875; PB: DIN 16968/16969.
Connection male thread G3/4 according to DIN EN 16313 (Eurocone).
Nickel-plated brass.

Ø Pipe
EAN
Article No
12x1,1
4024052136018
1315-12.351
14x2
4024052134618
1311-14.351
16x1,5
4024052136117
1315-16.351
16x2
4024052134816
1311-16.351
17x2
4024052134915
1311-17.351
18x2
4024052135110
1311-18.351
20x2
4024052135318
1311-20.351

Compression fitting

for Alu/PEX multi-layer pipe according to DIN 16836.
Connection male thread G3/4 according to DIN EN 16313 (Eurocone).
Nickel-plated brass.

Ø Pipe
EAN
Article No
16x2
4024052137312
1331-16.351
18x2
4024052137411
1331-18.351

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