Solenoid operated valve

Solenoid valve

A solenoid valve or SOV is an electromechanically operated valve.

 This is controlled by an electric current through a solenoid coil, a magnetic field is produced in the electrical coil which mechanically operates the plunger of the valve and hence changes the path of air or fluid from one direction to another direction.

Types of solenoid valve:

2/2-way solenoid valve

This type of valve has 2 ports and it acts in  2 positions. 

It means the solenoid valve has two ports one is the inlet port and another port is the outlet port, material passing through the solenoid valve either pneumatic or fluid is applied to the inlet port and exhausted through the outlet port.

Two-position of solenoid valve means that its piston or plunger has two-position, either valve is open or close.



3/2-way solenoid valve

 This type of valve has 3 ports and 2 acting positions.




5/2 way solenoid valve

 This type of valve has 5 ports and 2 positions.




Types of a solenoid valve according to operation 

Direct-acting

Any Medium air (pneumatic) or fluid (oil or water etc), flows through the orifice of SOV and the path is closed or open when the valve is activated through an electric signal or by a manual lever.




Indirect operated SOV

 (Servo or pilot operated)

A diaphragm is operated to change the path of fluid, like auto drain valve, etc.



Types of a solenoid valve according to valve normal position

Normally open

This is a type of solenoid valve in which at the normal position when the solenoid valve is not energized and there is no power at coil then the valve is open and fluid or air can pass through the valve from one port to another.

Normally close


This is a type of solenoid valve in which at the normal position when the solenoid valve is not energized and there is no power at the coil then the valve is closed and fluid or air can not pass through the valve from one port to another port.

Types of SOV according to supply

Ac  supply  usually 220v or 110 volts

or dc supply usually 24 or 12 volts

Parts of solenoid valve







Common faults in solenoid valve









Pressure measurement 


Vibration measurement


Solenoid Operated Valve


Flow measurement


Gas analyzer


Belt Weigh Feerder


Temperature measurement


Load cell



Comments

Post a Comment

Popular posts from this blog

Top 50 Instrumentation Interview Questions

 Instrumentation Interview Questions and Answers Instrumentation Interview Questions and Answers There are different questions that you can be asked in an interview for the post of instrument technician, instrumentation engineer, or instrument supervisor. Most interview questions are related to the industry you are going to apply to, and they prefer a skilled person and have a good knowledge of instruments used in that specific industry. Here I will try to write the question with answers that are mostly asked for instrumentation professionals. Q. No. 1:  What is instrumentation? Ans :  Instrumentation is a branch of science which deals with the measurement and control of process variables in a process. Q. No. 2  What is the process? Ans :  The process is defined as the adoption of series of steps or methods to acquire a predefined result. Q. No. 3  What is a process variable? Ans :  It is a variable in the process that we are attempting to maintain...
Read more

Control Valve Basics

Image
Control Valve  What is a control valve A control valve is an instrument that regulates the flow of fluids (oil, water, or gases) as the valve position is changed by moving the stem with help of an actuator. This actuator may be a motor of a pneumatic or hydraulic jack.  The control valve is the most commonly used final control equipment in the control loop of an industrial process. The control valve receives a control signal as input from plc or DCS, a controller is used to compare the setpoint and control valve actual position and then decides to open or close the valve according to match the set point. Classes of  Control Valve on the base of motion Two main types of valves are according to the motion of the stem. 1. Linear motion  2. Rotary motion 1. Linear motion  Linear motion is a movement of valve stem up and down, a common type of linear motion control valve is the Gate valve. 2. Rotary motion  A rotary motion valve moves or rotates at an angle usu...
Read more

Radar level measurement

Image
 Radar Level  Radar level transmitter are used to measure level in industrial applications. Radar level measurement method is an advanced method. In radar level transmitter time of flight method is used to measure the level. By calculating this time of flight we measure the level of liquid or solids.  RADAR level have a transmitter which transmit microwave or radar waves after colliding with material they return back to the receiver.  The time from the transmitter to the echo return to the receiver, is calculated, which is proportional to the level. This time is calculated by the formula:  Distance = (Speed of light x time delay) / 2 This calculation is done by a built in microprocessor and the level is displayed on screen or lcd, a signal proportional to level in 4 to 20 mA is output of level transmitter , this standard current signal of 4 to 20 mA is for plc or dcs. Time of Flight technology  Time of flight technology is used in  devices that are mu...
Read more