Pneumatic Pressure Transmitters Principle
Force Balance Pressure Transmitters or Pneumatic Pressure Transmitters First we have to know that the Force Balance Pressure Transmitters are very old concept which uses pneumatic (air) signals for transmitters operation.…
Displacer Level Transmitter Dry Calibration with Weights
A displacer level transmitter consists of a displacer element which is suspended from a hanger with a torque tube which is connected to the transmitter head. The displacer element is…
Bellows, Diaphragms and Bourdon Tubes
Bellows, Diaphragms and Bourdon Tubes Mechanical pressure-sensing elements include the bellows, the diaphragm, and the bourdon tube. Each of these devices converts a fluid pressure into a force. If unrestrained,…
Overview of Woodward Governor 505
Governor is a device which senses the speed of an engine or turbine and controls the fuel (or steam) to the engine or turbine to maintain the speed at a…
Pilot-operated Relief Valve Principle
Like other pressure relief valves (PRV), Pilot operated relief valves (PORV) are used for emergency relief during overpressure events (e.g., a tank gets too hot and the expanding fluid increases the pressure to dangerous…
Pressure Relief Valve Principle
A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; pressure might otherwise build up and create a process upset, instrument or equipment failure,…
Dome Valve Working Principle
Dome Valve is a pressure tight compressed air operated valve, capable of returning over one million maintenance-free cycles, even in abrasive, hazardous or toxic applications. It is unique in its ability…
Reversing Control Valve Actuator Fail Safe Mode
Reversing Control Valve Actuator Fail Safe Mode I want to reverse the "fail safe" mode of a Masoneilan (MIL) make control valve  from "fail open" to "fail close " and vice…
Why we Require Dual SOV on a Control Valve?
Solenoid valves are often used in some applications in which a control valve under certain conditions requires where it quickly was driven to the fail position. Solenoid valves are usually…
Types of Level Gauges
Level gauge is a device which is used to show the level of fluids in fields. Depending on the type of application used, the type of level gauge should be…
