Float Valves
A float valve is a mechanical level valve fitted to a tank’s supply line that throttles the flow as the float rises and shuts the water off completely when the tank is full. It keeps the tank at the set level without electricity.
The store range includes plastic ball float valves from ½” to 2″. Stainless tank floats have an AISI 304 body and arm with an AISI 316 ball; with a 220 mm standard or 150 mm optional sphere they work up to 6 bar supply pressure.
Main Applications
- Roof and building water tanks
- Livestock and irrigation tanks
- Cooling tower basin make-up
- Boiler feed water tanks
- Process water break tanks
Technical Data
| Operation | Valve throttled and closed by float movement |
|---|---|
| Plastic type sizes | ½”, ¾”, 1″, 1¼”, 1½”, 2″ (product range) |
| Stainless type material | Body and arm AISI 304, ball AISI 316; optional PTFE coating |
| Stainless type connection | ¾” or 1″ thread |
| Float diameter | 220 mm standard, 150 mm optional |
| Supply pressure | 6 bar standard; 8 bar with large float |
| Temperature | Up to 90 °C (stainless type) |
| Medium | Water, demineralised water and neutral liquids |
| Mounting | Horizontal or vertical |
Material Options
| Part | Plastic float valve | Stainless tank float |
|---|---|---|
| Body | Plastic (by model) | AISI 304 stainless |
| Arm | By model | AISI 304 stainless |
| Float | Plastic ball | AISI 316 ball, optional PTFE coating |
| Use | Clean water tanks | Hot water and neutral liquids |
Which material? As supply pressure rises, more buoyancy is needed to close the valve; on lines above 6 bar use a large float or a pressure reducing valve.
Advantages
No Power Needed
- Fully mechanical operation
Prevents Overflow
- Water shut off when full
Wide Size Range
- From ½” to 2″
Stainless Option
- Resists hot water
Construction and Design Features
- Valve body connected to the supply line
- Closing arm linked to the float
- Plastic or stainless spherical float
- Horizontal or vertical mounting connection
Write the supply line size, pressure and water temperature; we will confirm a plastic or stainless float valve.
How to Choose?
- Set the sizeWrite the tank supply pipe diameter.
- Check the pressureUse a large float or pressure reducer above 6 bar.
- Choose the materialPrefer the stainless type for hot water and neutral liquids.
- Decide the orientationPick horizontal or vertical mounting by tank inlet.
Complementary Products
Why ORFA?
Other Level Control Devices
Alarm and Remote Monitoring Devices
Alarm and remote monitoring devices report the level status in tanks and wells by audible, visual or remote notification.
Details →
Glass Tube Level Gauge
Glass tube level gauges allow the liquid level inside a tank to be seen directly through a transparent glass tube.
Details →
Electric Level Float Switches
Electric level float switches float with the liquid level, change contact and operate a pump or alarm.
Details →
Hydrostatic Level Transmitters
Hydrostatic level transmitters measure level from the pressure of the liquid column and provide a continuous signal.
Details →Capacitive Level Sensors
Capacitive level sensors detect the level of liquids and solids by changes in capacitance.
Details →Solids Level Switches
Solids level switches detect the level of powder and granular materials in silos and bunkers.
Details →
Boiler Proportional Level Controllers
Boiler proportional level controllers continuously measure the water level in steam boilers and adjust the feed water proportionally.
Details →
Boiler Level Switches
Boiler level switches detect low and high water levels in steam boilers and control the burner, pump or alarm.
Details →
Boiler Feed Water Level Controls
Boiler feed water level controls start and stop the feed pump according to the water level in the steam boiler.
Details →
Magnetic Level Indicators
Magnetic level indicators show the tank level by transferring the movement of a magnetic float to external indicator flaps.
Details →
Magnetic Level Transmitter
Magnetic level transmitters convert the position of a magnetic float into a continuous electrical signal.
Details →
Stainless Steel Level Switch
Stainless steel level switches are float level switches with stainless steel bodies suitable for corrosive and hot liquids.
Details →
Plastic Level Switches
Plastic level switches are economical float switches used in water and mild chemical tanks.
Details →Radar Level Transmitters
Radar level transmitters measure the level of liquids and solids without contact and provide a continuous signal.
Details →
Reflex Glass Level Gauges
Reflex glass level gauges show the liquid level clearly in steam boilers and pressure vessels.
Details →
Level Indicators
Level indicators allow the liquid level in tanks and vessels to be monitored on site.
Details →
Level Control Panels and Sensors
Level control panels and sensors are control systems that automatically start and stop pumps according to the level in tanks and wells.
Details →
Liquid Level Electrodes
Liquid level electrodes detect the level of conductive liquids by electrode contact and send a signal to the level relay.
Details →
Float Level Switches
Float level switches change contact by means of a float moving with the liquid level and control a pump or alarm.
Details →
Tank Level Switches
Tank level switches signal at set levels in storage tanks to control filling, emptying and alarms.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.