How do Pneumatic Solenoid Valve Works?

In a pneumatic system, air valves are used to control the flow of air. A solenoid valve is used both in a hydraulic and pneumatic system. It is a method to convert electrical signals into Pneumatic functions. Solenoid valves are controlled by a solenoid and typically used to manage the flow of air and water as a switch. Pneumatics controls the opening and closing action of a solenoid.

What is a solenoid?

A solenoid refers to a coil used to create magnetic fields when wrapped around a magnetic core or object.

Kinds of Pneumatic solenoid valve

Valves can be classified as externally or internally piloted. Externally piloted valves use an external source of air pressure. Internally piloted valves use an internal source of air pressure. They can also be divided based on the number of connections or paths for flow they contained.

The most basic type of valve is a two way, two-position poppet valve, which helps in opening and closing of flow when their coil is energized. Another example is three ways, two-position poppet valve. This type of valves allows diverting of fluids from one channel to another. Two 3/2 valves in parallel can be used to control and cylinder bi-directionally. These types of valve are used in hydraulics and pneumatics.

Which types of pneumatic control valves are used?

An internally driven pilot with four-way connections is usually used in Pneumatic operations.

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Pneumatic Press v/s Hydraulic Press

Presses are used in industries for a variety of uses like squeezing, forming and pressing. There is various type of presses, the most famous two being Hydraulic press and Pneumatic press. They are used to perform some similar things. However, there are some differences between them, which need to be kept in mind before choosing any one of them.

Pneumatic Press

The manipulation of pressurized air controls this press. The air is forced into a tube, which after filling applies pressure on the press to move it downwards. Once the stroke of the press gets completed, the air is excavated through valves. Finally, mechanical spring’s causes the pump to move upwards.

Hydraulic Press

Hydraulic presses are chambers filled with liquid, which is generally oil. A piston presses into the chamber, causing the oil to shift position. Since, the chamber is sealed the oil exerts pressure on large piston or baseplate, causing it to move downwards.

Which to choose Hydraulic or Pneumatic?

The primary difference between the two is speed. A pneumatic press is much faster than the hydraulic press, which means it can perform many jobs faster. However, this advantage is not suited, where slow speed is required.

Level of maintenance required is also different. Hydraulic presses require more care and maintenance. They have many components which need to be maintained regularly. This makes them more costly. On the contrary, Pneumatic presses need less time and maintenance.

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