Valve

Needle Valve: The needle valve, like globe valve, is used for flow control. It allows precise regulation of flow, although it is generally only capable of relatively low flow rates. Normally needle valve is used in smaller sizes and is provided with either screwed or socket weld ends. The major body parts of needle valve are- Body Bonnet Packing Nut Stem Screw Handle ...

Double block and bleed valves are also known as DBB valves. This valve is a space-saving dual isolation solution that reduces the need for costly multi-valve systems. By combining all block and bleed components into a single unit, DBB valves minimize the risk of leak paths to atmosphere while providing significant weight savings. In many DBB valves, the isolation valve ...

Swing Check Valve: Swing check valve is a non-return valve which operates by the swinging action of the disk. This valve is used for sizes 2” and above. There are two types of swing check valves available. They are the conventional swing check valves with flanged ends and the wafer type spring loaded check valves. 1. Conventional Swing check valve: ...

Based on functions, valves are classified as isolation, regulation, non return valve and special type of valve.  Non Return Valve: As the name indicates, this non return valve is used to ensure unidirectional flow of fluids. It is used to prevent the back flow in order to safeguard the critical equipments such as pumps, compressor etc and also used for positive. ...

Butterfly valve: Butterfly valve is one of the types of valves positive shut-off quarter-turn valve. It’s majorly used in utility services such as air, gas, steam, or liquid because of two reasons: they are lower in cost and also they are light in weight. They are available in variety of design depending on the service and the pressure-temperature rating. These valves can ...

Globe Valves: A globe valve is used for regulating flow in a pipeline. A globe valve consists of a movable disk-type element and a stationary ring seat in a generally spherical body. The gradual change in spacing between the disk and seat ring gives the globe valve good throttling ability. Globe Valves are available with a variety of bonnet types, ...

Ball valves are also classified based on the body construction : • Single piece design • Two piece design • Three piece design • The short pattern • The long pattern • Sandwich design. • Flush bottom design In the single piece design valve, the body will be cast/forged as one piece. The insertion of the ball will be through ...

Introduction to Ball Valve- An Isolation Type of Valve The ball valve is normally used as positive shut off valves. The positive shut off is attained because of the soft seats. Special design is also available with ball having shaped port for  regulation. Metal seated ball valves are also available for high temperature service. They are also considered as quarter turn ...

Introduction to Gate Valves Gate valves (GV) are specifically used in isolation applications in various piping systems. And they operate in the fully opened or fully closed positions. Like other isolation types of valves like ball valve, plug valve, piston valve, diaphragm valve, butterfly valve, pinch valve,  gate valves are also isolation valves. Gate valves are multi-purpose bi-directional shutoff valves for commercial and ...

Valves exceed any other piping component. Estimates reveal that a substantial portion, approximately 8-10%, of the total capital expenditure of the chemical process industry is used for the procurement of valves. In terms of the number of units also. Hence, proper thought should be given for the selection of valves. The first step in the selection is to determine exactly what function the valve ...