Control Valves

Inspection and Test Requirement of Control Valves

S Bharadwaj ReddyJune 1, 2019June 1, 2019

Inspection and Test Requirement of Control Valves Visual Test as per MSS SP-55 Dimensional Test: Face-to-face dimensions as per ANSI/ISA-75.08.01, ANSI/ISA-75.08.06, and ASME B16.10. Flange facings and dimensions as per...

Interview Questions on Control Valves

S Bharadwaj ReddyFebruary 19, 2019July 21, 2019

Interview Questions on Control Valves, Control Valves MCQ, Control Valves Objective Questions, Control Valves Multiple Choice Questions. Interview Questions on Control Valves How to define seat leakage class for control...

Types of Valve Actuators

S Bharadwaj ReddyFebruary 16, 2019August 8, 2019

Valve actuators are devices used to position valves. They can be used to fully open and shut a valve, or in an application that requires constant and precise control, such...

Classification of Control Valves

S Bharadwaj ReddyMay 31, 2018September 11, 2019

Classification of Control Valves : Globe Valve, Gate Valve, Butterfly Valve, Check Valve, Ball Valve, Disk Valve, Diaphragm Valve, Linear Valve,Rotary Valve The control valves are basically classified into two...

Types of Control Valve Trim

S Bharadwaj ReddyOctober 8, 2016September 20, 2019

As per ISA S-7505 trim is defined as the internal parts of a valve which are in flowing contact with the controlled fluid. Usually it contains a plug, seat, &...

Types of Control Valves

S Bharadwaj ReddyOctober 1, 2016February 6, 2019

Control valves are available in different types and shapes. They can be classified in different ways; based on: (a) action, (b) number of plugs, and (c) flow characteristics. (a) Types...

Control Valve Fail Safe Action

S Bharadwaj ReddySeptember 30, 2016July 25, 2019

There are two primary system considerations centering around an emergency operational situation for control valves. Control Valve Fail Safe Action I. Loss of instrument air supply (IAS) pressure II. Loss...

Thermostatic Valves Working Principle

S Bharadwaj ReddyAugust 28, 2016March 21, 2019

Thermostatic valves are used for the inﬁnite, proportional regulation of ﬂow quantity, depending on the setting and the sensor temperature. The valves are self-acting, i.e. they operate without the supply of...

Digital Control Valve Working Principle

S Bharadwaj ReddyAugust 3, 2016March 21, 2019

Diaphragm Digital Control Valve is an electrically actuated, hydraulically operated multi-function control valve. It can be used for local as well as remote controlled batching operations with electronic batch controller....

Difference between Pneumatic, Electrical & Hydraulic Actuators

S Bharadwaj ReddyJuly 20, 2016June 5, 2019

Major Difference between Pneumatic, Electrical & Hydraulic Actuators. Read about Pneumatic Actuators, Electrical Actuators & Hydraulic Actuators. Pneumatic Actuators A pneumatic control valve actuator converts energy (typically in the form...

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