All articles

Diaphragm Seal and Instrument Assembly

Operating Principle A diaphragm seal is attached to the process connection of the instrument. The...

Mounting Techniques of Diaphragm Seals

Introduction Diaphragm Seals, also referred to as chemical seals, are used in applications where the...

Calibration of level trol – Displacer level meter calibration

A level trol is used to measure and control the level of a tank,...

AC Adjustable Speed Drives

Introduction An adjustable speed drives (ASD) is a device used to provide continuous range process speed...

High resistance measurement using Megger

What is meggar instrument? Megger is used to measure very high resistances, such as those...

Low Cost PLC’s for beginners

Introduction I would like to introduce some low cost PLC's (Programmable Logic Controller) hardware for beginners...

What is balancing in control valves?

Introduction Balancing is the term used when the resultant force on a plug is neutral....

What is valve manifold? – 3 valve and 5 valve manifolds

What is a valve manifold? The valve manifold used to protect the DP transmitter from...

What are the Types of control Valves?

Table of ContentsLinear Motion Control valve Globe Type Control ValveGate Type control ValveDiaphragm Type...

How to reduce measurement noise?

There are a lot of possibilities for combining unwanted signals in process variable and...

Difference between single seated & double seated control valves

Single Seated Single seated valves are one form of globe valve that are very common...

Control Valve Noise and Cavitation

Introduction Sound is generated from the movement of fluid through a valve. It is only...