Types of SMC process air operated valve for general purpose

21.03.2019

Pilot valve is a device that consists of two valves, working in a pair. The first is the main one, which is installed in the pipeline system and the second is the pilot valve that controls the main one.

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SMC process air valves

What is the difference between internal and external pilot controls? If valve has internal pilot control, this means that compressed air to control the pilot valve is coming from main supply air, using a special channel.

In external pilot control valve compressed air is supplied through a separate port on housing or mounting plate to pilot valve.

In such systems, the pressure of compressed air is transformed into mechanical energy, which helps to control valve elements.

Represented SMC air valves can work with the following substances:

compressed air
water
steam
oil
vacuum
paints
coolant

This list contains the most popular materials, but includes many more others.

The material of body and other valve components are determined by the substance with which it will work. This applies not only to the housing, but also to the types of seals. A detailed description can be found in the manual on the company's website.

General-purpose devices can be produced in different versions, for example, in 2/2 or 2/3 – ways. There are also several ways of mechanical connection, and the client can choose the most suitable type.

Pneumatic valves that use compressed air

Valves of this type can be both pneumatic and electric principle of operation. They can be divided into two categories: general purpose and special.

General-purpose devices are universal and can be both with pneumatic and electric control type. All models of this type belong to the VN series.

The series also includes devices with pressure compensation and without p-compensation.

VNA series belongs to the VN group and includes devices that can compensate the forces that act on the valve.

This allows pressuring of the pilot air, which controls the whole process, not depending on the medium pressure. That is, the system itself can regulate the pressure inside pipeline.

The rest of the VN series does not have such function. However, much simpler design allows to significantly expand the choice of materials. A large number of housing options allows device to work in a wide variety of environments.

VNB are the most universal valves without pressure compensation. They can operate with different environments. Their conditional pass is from 7 to 50 mm.

Next series have already been created for the narrower purposes. The design of devices depends on the operated materials.

SMC coolant valves

VNC, SGH and SGC are designed to work with lubricating coolant. Since they find the greatest use in production, they created especially for work in the systems of machine tools.

This means that they can withstand not only temperature and pressure changes, but also are protected from ingress of foreign objects, for example, metal chips. Their seals are made of various metals.

VNC is a valve with a metal seals, designed to work with the coolant with a pressure up to 1.0 MPa. Have good protection against hydraulic impact.

SGH are valves that can operate at high pressure. Such device maintains work with pressure up to 7.0 MPa.

SGC is a modified valve. It is created as new improved model. By upgrading the design, reliability and capacity were increased. Such devices have energy saving functions. The valves can work with coolant with pressure up to 1.6 MPa.

VND is designed to operate in high temperature environments. They work with steam and hot liquids with temperatures up to 180 ° C. Such conditions make changes in their design, so the seals in the valve are made of Teflon (PTFE).

Special valves with pneumatic actuator using compressed air

Such valves are designed to operate with special environments. Most often, they are used when working with paints and other chemical substances.

SMC has created two series for working with paints and varnishes: SCV and VCC. They most often work with paints based on chemical solvents. They are very popular in the automotive industry.

SCV is a series designed specifically for working with paints and solvents. It has additional metal seals in the construction. The membrane is made of Teflon.

VCC is a series of valves with compact design. Its feature is a cassette head, which can control several flows of paint with different colors (can work with 40 different ones). Additional multi-color painting head can be located on the arm of the manipulator. It has VCK fittings for supplying and discharging fluids in order to properly regulate the flow of the required color.

Air ride valves for aggressive environments

Valves for working with other chemical materials belong to LV series. They can work with aggressive environments. The design is also suitable for use in conditions with high hygienic requirements.

They are divided by the method of coupling. Such valves can be built-in type, or with a threaded connection.

LVC is a series of built-in valves. They have special fittings in the design. They are necessary in order to connect the pipes of a chemically resistant material. Tubes with a diameter of 3 to 25 mm can be connected to them. Models with built-in flow control and bypass are available.

LVA is a series of valves with a threaded connection. Available connections range from Rc1 / 8 to Rc 1. Models are created with built-in flow control or bypass.

In general, the Japanese company has created a wide range of air-controlled valves that can be controlled in a very wide range of conditions.

On our website eltra-trade.com, you can find the most popular models of SMC valves.