Working Principle of Self Operated Valves
Although not a type of actuator itself, a form of actuation worthy of mention is where the process fluid pressure itself actuates a valve mechanism. The self-operating valve principle may…
How Ball Valves Work ?
In the Ball Valve design, a spherical ball with a passageway cut through the center rotates to allow fluid more or less access to the passageway. When the passageway is…
How Globe Valves Work ?
Globe valves restrict the flow of fluid by altering the distance between a movable plug and a stationary seat (in some cases, a pair of plugs and matching seats). Fluid…
How Gate Valves Work ?
Gate valves work by inserting a dam (“gate”) into the path of the flow to restrict it, in a manner similar to the action of a sliding door. Gate valves…
How Diaphragm Valves Work ?
Diaphragm valves use a flexible sheet pressed close to the edge of a solid dam to narrow the flow path for fluid. Their operation is not unlike controlling the flow…
How Sliding Stem Valves Work ?
A sliding-stem valve body is one where the moving parts slide with a linear motion. Some examples of sliding-stem valve body designs are shown here: Sliding Stem Valves Most sliding-stem…
Different Flow Measurement Technologies
Every flow-measuring devices exploits a physical principle to measure the flow rate of fluid stream. Discuss Different Flow Measurement Technologies.
What is an Insertion Flow Meter? – Types, Principle, Advantages
A classic example of an insertion flow meter element is the Annubar, a form of averaging pitot tube. Learn the types and principles.
Change-of-Quantity Flow Measurement
Change-of-Quantity Flow Measurement uses load cells to precisely measure weight which is directly proportional to mass with constant gravity.
Mechanical Vibration Switch Principle
Mechanical Vibration Switches provide vibration protection for low- to medium-speed machinery. An inertia sensitive mechanism activates a snap-action switch with SPDT output contacts if the vibration exceeds an adjustable setpoint.…
