Pneumatic Solenoid Valves (10 Products Listed)

IMI Buschjost Watson Smith MTL Solenoid Valves Without Pressure Differential
Solenoid valves without pressure differential do not require any operating or differential pressure in your system to open or close, and operate from 0 bar upwards.
IMI Buschjost
IMI Buschjost Watson Smith MTL Solenoid Valves With Pressure Differential
These valves operate according to a differential pressure and make use of the pressure energy of the operating fluid to open and close the valve. This allows for lower power consumption and a higher p...
IMI Buschjost
IMI Buschjost Watson Smith MTL Solenoid Valves With Force Lift
These valves combine direct and indirect actuation and are called force lift valves. These valves combine the advantages of direct actuation (no minimum pressure/flow required) and indirect actuation ...
IMI Buschjost
IMI Buschjost Watson Smith MTL Angle Seat Pilot Valves
These valves are a robust design being used in a wide variety of applications, including temperature stability applications, applications where resistance against aggressive mediums are required, or w...
IMI Buschjost
IMI Buschjost Watson Smith MTL Dust Valves
These valves provide an intense pulse of air blasts into the soiled filter element causing dust and loose dirt from the filter fall to the ground. Dust filter valves for air-blasting have been develop...
IMI Buschjost
IMI Buschjost Watson Smith MTL Motorised Valves
These valves are used wherever exact adjustment to the actual requirement is needed. These valves not only give an open or closed state, but can vary the flow rate of the valve. They use an electric m...
IMI Buschjost
IMI Herion Watson Smith MTL Solenoid Valves
Our range of solenoid valves enhance our standard solenoid offering and depending on the range cover the standard functions of 2/2, 3/2, 5/2 and 5/3 in a choice of body materials to suit the applicati...
IMI Herion
IMI Herion Watson Smith MTL Namur Valves
Our range of NAMUR valves are offered in a selection of body materials for varying indoor and outdoor applications with a range of ATEX solenoids depending on the application.
IMI Herion
IMI Herion Watson Smith MTL Safety Valves
Our range of Safety valves include products that with appropriate application can achieve performance level "e" (cat4) of DIN EN ISO 13849-1 for non-press safety related applications.
IMI Herion
IMI Herion Watson Smith MTL Press Safety Valves
Our range of Press Safety Range are designed for use with pneumatic clutch and brake systems, and with appropriate application can achieve performance level "e" (cat4) of DIN EN ISO 13849-1.
IMI Herion
What is a Pneumatic Solenoid Valve?
A solenoid valve, also known as an electrically-operated valve, is a valve that uses electromagnetic force to operate. When an electrical current is passed through the solenoid coil, a magnetic field is generated which causes a ferrous metal rod to move. This is the basic process that opens the valve and it works either directly or indirectly on the air.

Solenoid valves can be normally open or normally closed:

Normally Open (N/O), the valve remains open when the solenoid is not charged.
Normally Closed (N/C), the valve remains closed when the solenoid is not charged.
Why use a solenoid valve?
Solenoid valves eliminate the need for manual or pneumatic control of a pneumatic circuit and only require an electrical input (and air pressure for piloted valves) to operate, this makes them easy to program and install in a wide variety of applications.

What are the different types of solenoid valve?
As we shall see, solenoid valves can be split into the following broad categories: direct acting or solenoid piloted. Solenoid piloted valves can be further divided into internally or externally piloted valves, and are sometimes referred to as servo-assisted solenoid valves.

Direct acting
In the case of direct acting solenoid valves, the force generated by the solenoid must be greater than the force exerted by the pressure of the air. They do not require any line pressure to work, and can operate in vacuum conditions.

With direct acting, N/C valves, the solenoid rod is attached to a spool and kept in place by spring. When the solenoid is charged, the magnetic field causes the solenoid rod to lift, moving the spool and allowing air to pass through to the other side. In a N/O valve, the opposite happens – the spring keeps the spool in the open position.

Direct acting solenoid valves are of limited use and are only seen in about 10% of applications. This is because flow can be limited, and they consume a large amount of electrical power.

Internally piloted
Unlike direct acting solenoids, internally piloted valves work with system pressure to aid control, rather than against it. This makes them capable of controlling air flow using less power than is exerted by pressure in the line.

In internally piloted valves, the solenoid gates a smaller passage between the line and a cavity behind the spool. When this is opened, pressure in the line pushes the spool across, opening the valve. As the solenoid is controlling much smaller openings, it requires much less power to move compared to a directing acting solenoid valve.

Externally piloted
Externally piloted solenoid valves work in a similar way to internally piloted valves, but use air from an external source to assist valve movement, rather than pressure within the valve. This must come from upstream of the valve, but can also be provided from a separate circuit. This external air source is fed into an extra port on the valve. Externally piloted valves are typically used in low pressure, vacuum or alternative porting scenarios, where there is low, negative or no pressure in the valve itself to facilitate movement.

How is a solenoid valve controlled?
At the simplest level, solenoids can be controlled using a manually operated electrical on/off switch, which is sufficient in some applications. Most of the time however, more complex control is required using a control board. Control boards digitally set valves to operate at timed intervals or can be programmed to operate the valve when certain conditions are met, for instance when it receives a signal from a pressure switch. Solenoid valves can be controlled by a computer, making them easier to integrate into Industry 4.0 systems.

How to select a solenoid valve
The type of solenoid required will depend on several factors.

What is the pressure of the line? This will dictate how much power is required. It will also tell you whether a direct acting, internally or externally piloted valve is needed.
How quickly does the valve need to open or close? Piloted valves take longer to switch than direct acting valves, but require less power.
Do you need a N/O or a N/C valve? The valve must be appropriate to the application. The single most important consideration is the potential effect of a power cut or valve failure – is it safer for flow to stop or continue if this happens? If there are no safety considerations, then consider whether the line will be open or closed most of the time. If a line will be mostly in flow, then a normally open valve will be needed. If the reverse is true, then a normally closed valve will be needed. Getting this wrong will lead to increased energy costs and potential burnout of the solenoid.
What is the required flow rate, port size and number of ports? As with any valve, these factors depend entirely the valve function and what system it is being integrated into.
At Instronline we list Suppliers, Traders, Authorized Distributors, Manufacturers, Dealers in India and abroad of Pneumatic Solenoid Valves, IMI Buschjost Watson Smith MTL Solenoid Valves Without Pressure Differential, IMI Buschjost Watson Smith MTL Solenoid Valves With Pressure Differential, IMI Buschjost Watson Smith MTL Solenoid Valves With Force Lift, IMI Buschjost Watson Smith MTL Angle Seat Pilot Valves, IMI Buschjost Watson Smith MTL Dust Valves, IMI Buschjost Watson Smith MTL Motorised Valves, IMI Herion Watson Smith MTL Solenoid Valves, IMI Herion Watson Smith MTL Namur Valves, IMI Herion Watson Smith MTL Safety Valves, IMI Herion Watson Smith MTL Press Safety Valves,
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