Linear Valves
A linear valve is a stroke (globe type) control valve whose stem moves up and down; together with a valve actuator it sets flow proportionally or on-off in heating and cooling circuits.
It is used on fan coil, AHU, heat exchanger and heating circuits. The product range includes threaded 1/2″–1 1/4″ and flanged DN15–DN150, 2 and 3-way valves and fan coil valves.
Main Applications
- Fan coil heating-cooling control
- AHU coils
- Heat exchanger primary circuits
- Heating circuit mixing and diverting
- District heating substations
- Chilled water control
Technical Data
| Type | Stroke (linear) control valve |
|---|---|
| Ways | 2-way and 3-way (product range) |
| Threaded sizes | 1/2″, 3/4″, 1″, 1 1/4″ (product range) |
| Flanged sizes | DN15 – DN150 (product range) |
| Pressure class | PN16; PN10 / PN25 on some models (product names) |
| Drive | Linear valve actuator |
| Characteristic / Kvs | Depending on model |
| Fluid and temperature | Heating-cooling water; depending on model |
Material Options
| Part | 2-way linear valve | 3-way linear valve | Fan coil valve |
|---|---|---|---|
| Duty | Throttling flow | Mixing or diverting | Terminal unit control |
| Connection | Threaded or flanged | Threaded or flanged | Threaded |
| Size | 1/2″ – DN150 | 1/2″ – DN150 | 1/2″ – 1″ |
| Drive | Linear actuator | Linear actuator | Electrothermal or linear |
Which material? When choosing a linear valve, Kvs value, valve authority and actuator close-off force should be assessed together. Pressure classes come from product names; Kvs and temperature are confirmed per model.
Advantages
Precise Flow Control
- Modulating operation
2 / 3-Way
- Throttling and mixing
Wide Size Range
- From 1/2″ to DN150
Actuator Fit
- With linear actuators
Construction and Design Features
- Cast or brass body
- Stroke stem and plug
- Actuator connection neck
- Threaded or flanged ends
Send the flow, differential pressure, connection type and actuator control; we will confirm a suitable linear valve and actuator.
How to Choose?
- Size and connectionDetermine the threaded or flanged size.
- Pressure classChoose PN for the system.
- Flow and temperatureSend flow and differential pressure for Kvs.
- DriveMatch an on-off or modulating actuator.
Complementary Products
Why ORFA?
Other HVAC Valves
Balancing Valves
Balancing valves balance heating and cooling circuits by ensuring each branch receives its design flow.
Details →
Diaphragm Safety Valves
Diaphragm safety valves open when the set pressure is exceeded and protect closed heating systems against overpressure.
Details →
Automatic Air Vents
Automatic air vents release air trapped in heating and cooling installations automatically by means of a float mechanism.
Details →
Radiator Valves
Radiator valves are fitted to radiator supply and return connections to shut off or adjust the heating water.
Details →
Rotary Valves
Rotary valves are HVAC control valves operating with rotary movement, used with an actuator for mixing and diverting.
Details →Get a quote for your project
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