A Flow control valve is a valve that controls fluid flow by adjusting the size of the flow passage in response to a controller signal. This allows for direct control of flow rate and, as a result, control of process quantities such as pressure, temperature, and liquid level. Process Plants require that some of the … Read more
Needle valves Needle valves generally are used for instrument, gauge and meter line service. Very accurate throttling is possible with needle valves and therefore, they are extensively used in applications that involve high pressures and/or high temperatures. In needle valves, the end of the stem is needle pointed. The needle fits accurately into its seat … Read more
Diaphragm valves A diaphragm valve is a flow control device that relies on a flexible membrane (the diaphragm) to regulate or stop the passage of fluids. By pressing the diaphragm onto a seat, the valve blocks flow, and by lifting it, fluid can move freely. This simple yet efficient mechanism makes it suitable for a … Read more
Plug valves Plug valve, also called cocks, generally are used for the same full flow service as gate valves, where quick shut off is required. They are used for steam, water, oil, gas and chemical liquid service. Plug valves are not generally designed for the regulation of flow. Full flow is obtained when the opening … Read more
Safety valves Safety valves and pressure-relief valves are automatic pressure-relieving devices used for over pressure protection of piping and equipment. Safety valves are generally used in gas or vapour service because their opening and reseating characteristics are commensurate with the properties and potential hazards of compressible fluids. The Safety valves protect the system by releasing … Read more
Check valves are designed to prevent back flow in lines. The five principal types of check valves used are the tee-pattern lift check, the swing check, the tilting disk check, the wye-pattern lift check and the ball check. The swing check valve is the more commonly used. Check (non-return) valves are installed in pipelines to … Read more
Butterfly valve are low-pressure valves of efficient design which are used to control and regulate flow. They are characterized by fast operation and low pressure drop. They require only a quarter-turn from closed to full open position. Butterfly valve are available with metal-to-metal seats, soft seats and with fully lined body and disk. The soft … Read more
Globe valve: The essential principle of globe valve operation is the perpendicular movement of the disk away from the seat. Conventional globe valves may be used for isolation service. Although these valves exhibit slightly higher pressure drops than straight through valves (gate, plug, ball, etc.), they may be used where the pressure drop through the … Read more
The ball valve is a quarter-turn suitable for gas, compressed air, liquid and slurry service. The use of soft-seat materials such as nylon, delrin, synthetic rubbers and fluoridated polymers imparts excellent sealing ability. With fluoridated polymer seats, ball valves can be used for service temperatures ranging from –450 Deg. To 500 Deg. F; with graphite … Read more
Types of valve: Valves are the very important for any piping system. Without valves it’s impossible to run piping system. Valves are extensively used in piping system to Interrupt or Divert or regulate the flow of fluids. Various types of valves with their function are mentioned below. Type of valve base on bore includes Full … Read more