Self-Actuated Valves, Pneumatic & Hydraulic Actuators
Pneumatic actuators as illustrated in Figure, provide for automatic or semiautomatic valve operation. These actuators translate an air signal into valve stem motion by air pressure acting on a diaphragm…
What is Motor Actuator ?
Electric motors permit manual, semi-automatic, and automatic operation of the valve. Motors are used mostly for open-close functions, although they are adaptable to positioning the valve to any point opening…
Valve Handwheel Types : Fixed, Hammer, Gear
Valve actuators are selected based upon a number of factors including torque necessary to operate the valve and the need for automatic actuation. Types of actuators include manual handwheel, manual…
What is Needle Valve ?
A needle valve is used to make relatively fine adjustments in the amount of fluid flow. The distinguishing characteristic of a needle valve is the long, tapered, needle like point on…
Difference between Globe Valve and Gate Valve ?
Both flow valves,Globe valve and gate valve have similar external housing but operational functions of both differ little. The main difference between globe and gate valve is in the form…
What is Pinch Valve ?
The relatively inexpensive pinch valve is the simplest in any valve design. It is simply an industrial version of the pinch cock used in the laboratory to control the flow…
Compare Relief Valve and Safety Valve
Relief Valve and safety valve prevent equipment damage by relieving accidental over-pressurization of fluid systems. Compare Relief Valve and Safety Valve The main difference between a relief valve and a safety…
What is Stop Check valve ?
Check valves are designed to prevent the reversal of flow in a piping system. These valves are activated by the flowing material in the pipeline. The pressure of the fluid…
What is Butterfly Check Valve ?
Check valves are designed to prevent the reversal of flow in a piping system. These valves are activated by the flowing material in the pipeline. The pressure of the fluid…
What is Piston Check Valve ?
Check valves are designed to prevent the reversal of flow in a piping system. These valves are activated by the flowing material in the pipeline. The pressure of the fluid…
