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Frequently Asked Questions
Click on the questions to read the answers. If you need help to find a suitable valve, you can use the Valve Selection Wizard, read the Selection Guide or view the applications.
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Selection Wizard
Selection Wizard
Complete the questions to find suitable valves directly:
Solenoid Valves:
The valve is actuated with an electric current through the solenoid (electromagnet).
The flow is controlled with a drilled sphere (ball) which rotates around its axis, perpendicular to the bore. The ball rotates with the help of an electric motor.
The valve is actuated with an electric current through the solenoid (electromagnet).
- Switches directly.
- From 1/8 inch up to 2 inch.
- Normally Closed or Normally Open.
- Only for clean media.
- Uses energy as long as electrically energized.
- (Semi-)direct operated: from 0 bar pressure differential.
- Indirect operated: from ±0.5 bar pressure diff.
- Only one direction of pressure.
- Brass, Stainless Steel or Plastic housing.
- EPDM, FKM, NBR of PTFE seals.
The flow is controlled with a drilled sphere (ball) which rotates around its axis, perpendicular to the bore. The ball rotates with the help of an electric motor.
- Operates from 0 bar.
- Close gradually (±10s).
- Energy efficient.
- 1/2, 3/4 or 1 inch.
- For both flow directions.
- Brass Housing / PTFE sealing.
- Less sensitive to dirt.
NC = Normally Closed (most chosen): The valve is closed when the coil is not
electrically
energized.
NO = Normally Open: The valve is open when the coil is not electrically energized.
NO = Normally Open: The valve is open when the coil is not electrically energized.
Indirect operated solenoid valves need a pressure differential over the inlet and outlet port for
proper
operation. If the pressure differential is too low (f.e. a gravity fed system or a closed circuit),
only
(semi-)direct operated solenoid valves can be used. These operate from a zero bar pressure
differential.
The type of medium defines the material choice of the valve body and seals. By selecting 'Other',
you can
choose the material for the valve body and seals.
Most valves are provided with internal thread (BSPP = British Standard Pipe Parallel). Use the table
as a
guideline for sizing:
| Valve | Pipe ∅ |
|---|---|
| 1/8 inch | ± 4 - 8 mm |
| 1/4 inch | ± 6 - 12 mm |
| 3/8 inch | ± 8 - 15 mm |
| 1/2 inch | ± 10 - 16 mm |
| 3/4 inch | ± 15 - 22 mm |
| 1 inch | ± 20 - 30 mm |
| 1½ inch | ± 25 - 50 mm |
| 2 inch | ± 40 - 60 mm |
View products
Solenoid valves are supplied with a coil of choice for alternating current (AC) or direct current
(DC).
3-Way
Solenoid Valve
(orifice <3mm)
3-Way
Electric Ball Valve
(bore >8mm)
Solenoid
Valve or Ball Valve?
3-Way
Solenoid Valve
(orifice <3mm)
3-Way
Electric Ball Valve
(bore >8mm)
3-Way Solenoid Valve (orifice <3mm):For small flow rate, such as actuation of a
cylinder,
a
(small) fuel system, a test setup, etc.
3-Weg Electric Ball Valve (bore >8mm):For larger flow rates, such as central heating, irrigation, compressed air etc.
3-Weg Electric Ball Valve (bore >8mm):For larger flow rates, such as central heating, irrigation, compressed air etc.
Choose the right circuit function. The upper diagram shows the flow when the coil is not powered.
The lower
diagram shows the flow when the coil is powered.
The type of medium determines the choice of material for the seals. By selecting 'Other', you can
choose the
seal material yourself.
Tip: Use the
chemical resistance table
.
