What are the types of pneumatic valve

Pneumatic valves are classified into certain groups according to their function they are.
Directional control valves
dipahgram Flow control valves
Pressure control valves

Directional control valves
The important function of a directional control valve is to control the direction of flow in the pneumatic circuit. These valves can regulate the airflow and they are also capable to do the airflow starting and stopping. Directional control valves are able to control the way the air passes.

Non-return valve
These valves are also used to control the flow of air and they allow the airflow only in one direction in the other direction the airflow will be blocked at all the time. These valves are designed in a way that check is additionally loaded by the downstream air pressure, and it would support the non-return action. There are certain non-return valves those can do pneumatic controls they are check valve, shuttle valve, quick exhaust valve, and two pressure valve.

Flow control valves
This valve is capable to regulate the flow of air and the control action is limited to the airflow passing through the valve, when it is open, maintaining a set volume per unit of time.

Pressure control valve
In pneumatically operated control valves pressure control can be done, these types of control valves can control the air pressure in the valve. So basically these valves can control the airflow pressure in valves. Pressure control valves are classified into three types they are pressure limiting valve, pressure sequence valve, and pressure reducing valve.