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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.

Which valve?

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Selection Wizard

Complete the questions to find suitable valves directly:

2-way
3-way

Type:

2-Way Solenoid Valve

2-Way Electric Ball Valve

Solenoid Valve or Ball Valve?

Solenoid Valves: 2-Way Solenoid Valve

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.

Electric Ball Valves: 2-Way Electric Ball Valve

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.

Function:

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.

System:

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.

Medium:

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.

Tip: Use the material table.

Valve:

Seal:

Port:

1/8 inch

1/4 inch

3/8 inch

1/2 inch

3/4 inch

1 inch

1½ inch

2 inch

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

Voltage:

Solenoid valves are supplied with a coil of choice for alternating current (AC) or direct current (DC).

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Control:

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3-point