The Termojet three-way valve mixes or diverts the flow of heat carrier to maintain a set temperature in a radiator, underfloor heating or hot water circuit. The catalog includes DN20–DN50 rotary three-way mixing valves, thermostatic and zone valves, four-way valves for boiler protection and the actuators for them. Own manufacturing since 2002, prices from UAH 1,342, delivery across Ukraine.
Three-way mixing valve
Rotary valves · DN20–DN50 · Kvs 2.5–40 m³/h · PN 10 bar · for actuator
Three-way mixing valve Termojet, DN20, kvs-2,5 male thread
Three-way rotary mixing valve Termojet DN20 is a compact fitting with a rotary plug and external thread G 3/4" for automatic heating fluid temperature control in heating systems.
Three-way mixing valve Termojet DN20 (¾"), Kvs 6.3, female thread
Three-way rotary mixing valve Termojet DN20 is a fitting with a rotary plug and internal thread Rp ¾" for automatic stepless mixing of heating fluid.
Three-way mixing valve Termojet DN25 (1"), Kvs 6, male thread
The Termojet DN25 three-way rotary mixing valve is a fitting with a rotary plug and external thread G 1" for automatic mixing of the heating medium in heating systems.
Three-way mixing valve Termojet DN25 (1"), Kvs 10, female thread
The Termojet DN25 three-way rotary mixing valve is a fitting with a rotary plug and internal thread Rp 1" for automatic control of the heating medium supply temperature.
Three-way mixing valve Termojet DN32 (1¼"), Kvs 12, male thread
Termojet DN32 three-way rotary mixing valve — fitting for medium and high-capacity heating systems with male thread G 1 1/4". Flow coefficient Kvs 12 m³/h, operating pressure PN 10 bar, temperature range –10…+110°C.
Three-way mixing valve Termojet DN32 (1¼"), Kvs 16, female thread
Termojet DN32 three-way rotary mixing valve — high-flow fitting with female thread Rp 1¼" for medium and high-capacity heating systems. Flow coefficient Kvs 16 m³/h, operating pressure PN 10 bar, temperature range –10…+110°C.
Three-way mixing valve Termojet DN40 (1½"), Kvs 18, male thread
Termojet DN40 three-way rotary mixing valve — a fitting for high-capacity heating systems with external thread G 1 1/2". Flow coefficient Kvs 18 m³/h, working pressure PN 10 bar, temperature range –10…+110°C.
Three-way mixing valve Termojet DN40 (1½"), Kvs 25, female thread
Termojet DN40 three-way rotary mixing valve — a fitting with a rotary brass ball and internal thread Rp 1½" for automatic blending of heat-transfer fluid in large heating systems.
Three-way mixing valve Termojet DN50 (2"), Kvs 40, female thread
Termojet DN50 three-way rotary mixing valve — the largest size in the line with internal thread Rp 2" and flow coefficient Kvs 40 m³/h. Working pressure PN 10 bar, temperature range –10…+110°C.
Three-way thermostatic valve
Mixing without an actuator · 20–43 °C and 35–60 °C · accuracy ±2 °C · ¾" and 1" · hot water, showers, bathrooms
Three-way thermostatic valve Termojet ¾", Kvs 1.6, 20–43 °C, male thread
The Termojet TMV121 thermostatic three-way valve is a passive mixing device with a built-in thermostat element that automatically maintains the set outlet temperature in the range of 20–43°C with an accuracy of ±2°C.
Three-way thermostatic valve Termojet ¾", Kvs 1.6, 35–60 °C, male thread
The Termojet TMV122 thermostatic three-way valve is a passive mixing device with a built-in thermostat element for domestic hot water systems, showers and bathrooms.
Three-way thermostatic valve Termojet 1", Kvs 1.6, 20–43 °C, male thread
The Termojet TMV131 thermostatic three-way valve is a passive mixing device with a built-in thermostatic element for automatic outlet temperature control in the range of 20–43°C with an accuracy of ±2°C.
Three-way thermostatic valve Termojet 1", Kvs 1.6, 35–60 °C, male thread
The Termojet TMV132 thermostatic three-way valve is a passive mixing device with a built-in thermostatic element for domestic hot water systems and bathrooms.
Three-way thermostatic valve Termojet 1", Kvs 2.5, 20–43 °C, male thread
The Termojet TMV231 thermostatic three-way valve is a passive mixer with a built-in thermostatic element and an increased flow coefficient Kvs 2,5 m³/h.
Three-way thermostatic valve Termojet 1", Kvs 2.5, 35–60 °C, male thread
The Termojet TMV232 thermostatic three-way valve is a passive mixing device with an increased flow coefficient for domestic hot water systems with higher consumption.
3-way zone valve with actuator
Diverting valves for zone control of heating and DHW · DN25 and DN32 · Kvs 8 and 13 m³/h · 230 V · 8 s per 60°
3-way zone valve Termojet DN25 (1") with electric actuator 230 V, Kvs 8, ABF-ZV3-100
Zone 3-way valve ABF-ZV3-100 DN25 (1") with 230V AC actuator for zone control of heating, DHW, ventilation and heat pump systems. Kvs 8 m³/h, torque 5 Nm, rotation time 8 s/60°.
3-way zone valve Termojet DN32 (1¼") with electric actuator 230 V, Kvs 13, ABF-ZV3-114
Zone 3-way valve ABF-ZV3-114 DN32 (1¼") with 230V AC actuator for zone control of heating, DHW, ventilation and heat pump systems. Kvs 13 m³/h, torque 5 Nm, rotation time 8 s/60°.
Four-way mixing valve
Protects the boiler from condensation corrosion · DN25 and DN32 · Kvs 12 and 18 m³/h · CW617N brass · for actuator
Four-way mixing valve Termojet DN25 (1"), Kvs 12, female thread
Four-way rotary mixing valve DN25 protecting the boiler against condensation corrosion. Female thread Rp 1", Kvs 12 m³/h, PN 10 bar. CW617N brass body, EPDM seals.
Four-way mixing valve Termojet DN32 (1¼"), Kvs 18, female thread
Four-way rotary mixing valve DN32 protecting the boiler against condensation corrosion. Female thread Rp 1¼", Kvs 18 m³/h, PN 10 bar. CW617N brass body, EPDM seals.
Actuator for a three-way valve
For 3-way and 4-way rotary valves · 230 V or 24 V · 3-point, on/off or 0–10 V control
Actuator Termojet 401N for mixing valve, 230 V, 3-point, 120 s
Termojet 401N actuator is a compact motorized servo-actuator for 3- and 4-way rotary mixing valves. Supply voltage 230V AC, control type — 3-point (ON/OFF), torque 6 Nm, full travel time 90° — 120 seconds, protection class IP42.
Actuator Termojet 405N for mixing valve, 230 V, 3-point, 60 s
Termojet 405N actuator is a motorized servo-actuator for 3- and 4-way rotary mixing valves in heating systems.
Actuator Termojet 411 for mixing valve, 24 V, 0–10 V control, 6 Nm
Termojet 411 actuator — a proportional motorized servo actuator for 3- and 4-way rotary mixing valves with analogue control.
Actuator Termojet 412N for zone valve, 230 V, two-position, 60 s
Termojet 412N actuator — a two-position motorized actuator for zone and control valves in heating and air conditioning systems. Supply voltage 230V AC , control type — 2P+AUX (two-position with auxili
Actuator Termojet 413 with controller and sensor, 230 V, 3-point, 5–90 °C
Termojet 413 actuator — a unique “actuator + controller + sensor” solution in a single housing for 3- and 4-way rotary mixing valves.
How to choose a three-way valve
A valve is selected by three parameters: the task (mixing, flow diverting or thermostatic mixing without an actuator), the connection diameter and the flow Kvs.
Three-way valve for underfloor heating
For an underfloor heating mixing circuit in a private house, a DN20 or DN25 rotary three-way mixing valve with an actuator is usually installed. On a signal from the controller, the actuator lowers the supply temperature to the level the screed requires. If you need a ready-made solution with a pump and valve in one unit, an underfloor heating mixing unit is a good fit.
Three-way valve for a boiler
A three-way mixing valve with an actuator is installed on the boiler circuit to supply the system with heat carrier at the required temperature. A zone valve switches the flow between heating and the DHW cylinder.
To protect the boiler from condensation corrosion, Termojet offers DN25 and DN32 four-way valves. They blend hot supply water into the return line, so cold water never returns to the boiler — this is how anti-condensation protection for solid fuel boilers is built.
Diameter and Kvs: model table
Kvs is the water flow through the valve in m³/h at a pressure drop of 1 bar. The more powerful the circuit, the higher the Kvs required; a Termojet engineer will make the exact calculation.
| Diameter | Thread | Kvs, m³/h | Price |
|---|---|---|---|
| DN20 (¾") | male thread | 2.5 | UAH 1,342 |
| DN20 (¾") | female thread | 6.3 | UAH 1,482 |
| DN25 (1") | male thread | 6 | UAH 1,425 |
| DN25 (1") | female thread | 10 | UAH 1,776 |
| DN32 (1¼") | male thread | 12 | UAH 1,493 |
| DN32 (1¼") | female thread | 16 | UAH 2,483 |
| DN40 (1½") | male thread | 18 | UAH 2,354 |
| DN40 (1½") | female thread | 25 | UAH 5,224 |
| DN50 (2") | female thread | 40 | UAH 5,548 |
Three-way or four-way valve: which to choose
| Three-way mixing valve | Four-way mixing valve | |
|---|---|---|
| Purpose | mixes supply and return in a single circuit | mixes the circuit and blends hot supply into the boiler return |
| Where installed | radiator, underfloor heating and DHW circuits | next to the boiler, including a solid fuel boiler, for protection against condensation |
| Termojet diameters | DN20–DN50 | DN25, DN32 |
| Kvs, m³/h | 2.5–40 | 12, 18 |
| Actuator | 401N, 405N, 411, 413 | 401N, 405N, 411, 413 |
For a gas boiler or a heat pump, a three-way valve is enough. For a solid fuel boiler without separate anti-condensation protection, choose a four-way valve.
How to choose an actuator for a valve
All Termojet actuators 401N, 405N, 411 and 413 fit three-way and four-way rotary valves; 412N fits zone and control valves. They can be controlled by zone control thermostats and controllers.
| Model | Power supply | Control | Rotation time | When to choose |
|---|---|---|---|---|
| 401N | 230 V | 3-point | 120 s | mixing circuit with an external controller |
| 405N | 230 V | 3-point | 60 s | same, when a faster response is needed |
| 411 | 24 V | 0–10 V, proportional | 60 / 120 s | automation with an analog signal |
| 412N | 230 V | on/off, 2P+AUX | 60 s | zone valves, flow switching |
| 413 | 230 V | built-in controller and sensor, 5–90 °C | 120 s | constant temperature without a separate controller |
Questions about valves
Which three-way valve do I need for underfloor heating?+
For a private house, a DN20 or DN25 rotary mixing valve with an actuator is usually enough. If you need a turnkey solution with a pump, choose an underfloor heating mixing unit.
Which valve should I choose for a solid fuel boiler?+
A DN25 or DN32 four-way mixing valve. It blends hot supply water into the return line and protects the boiler from condensation corrosion.
How does a thermostatic valve differ from a mixing valve with an actuator?+
A thermostatic valve works without power: the built-in thermal element holds 20–43 °C or 35–60 °C at the outlet with ±2 °C accuracy — a solution for hot water and bathrooms. A mixing valve with an actuator is operated by a controller and regulates the temperature of the heating circuit.
Can an actuator be fitted to a Termojet valve?+
Yes. Actuators 401N, 405N, 411 and 413 fit three-way and four-way rotary valves, and 412N fits zone valves. Thermostatic valves do not need an actuator.
What is the difference between valves with female and male thread?+
The connection method and the flow capacity: at the same diameter, the female thread model has a higher Kvs. For example, a DN25 with male thread has Kvs 6, with female thread — Kvs 10.
Is delivery across Ukraine available?+
Yes. Termojet is own manufacturing since 2002. We deliver all over Ukraine. See the terms on the delivery and payment page.