BMT - Ventiloptionen - Bistabile Magnetventile

Produkte

Ventile

Mediengetrennte
Magnetventile

Mediengetrennte
Proportionalventile

Quetschventile

Miniatur
Magnetventile

Proportionalventile

Magnetventile

Mediengetrennte
Pneumatikventile

Pneumatische
Schrägsitzventile

Luft- und Raumfahrt
Ventile

Ventiloptionen &
Zubehör

Bistabile
Magnetventile

Position-Feed-Back
Shaft

Soft-Seal

Ventiduct Option

Zero-Internal Volume
Valve

Zero-Pumping Volume
Valve

Pumpen

Manifolds & Chips

Sensoren

Schnellkupplungen, Fittinge & Schläuche

Entwicklungen

Mass-Flow-Controller

Labor Equipment

Microfluidic

Kataloge

Ventiloptionen - Bistabile Magnetventile

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In the case of a normally closed type of conventional solenoid valve, continuous energization is required to maintain open state. The latching solenoid valve doesn't require a power supply for the purpose of maintaining open state through the utilization of a permanent magnet. Please see here for an explanation of the principles of operation:
The diagram below shows an example of the EL Series pinch valve.
The attractive force between the pole piece and plunger by which a valve's operation is produced varies according to three factors:

1. The distance between the pole piece and the plunger (the valve's stroke)
2. The magnetic force of the coil
3. The magnetic force of the permanent magnet.

According to the balance of this force with the spring, the valve changes between open and closed state.

Open to closed operation
Power OFF	Power ON	Power OFF

Permanent magnet's attractive force < Spring There is an open space between the pole piece and the plunger and the attractive force of the permanent magnet is lower than the force of the spring.	Current flows to the coil, the electromagnetic force is created in such direction that the attractive force increases and becomes stronger than the spring. Then, the plunger moves towards the pole piece.	Permanent magnet's attractive power > Spring The space between the pole piece and the plunger narrows and so the attractive force is strengthening. Even the magnetic force from the coil is cut, the attractive force is stronger than the force of the spring.