Valves are the key role players in the operations of industries.
Ball valves are broadly used in industry due to its reliability, easy operation and wide range.
A valve with a Center bored ball just by operating it between 90° make it a On-Off Valve. The bore allows the fluid to pass through once its in sequence to ports.
Ball valve Range
Full Port/ Standard Port / Reduced Port / Vented
Size 15 NB to 800 NB
Floating Ball – 2 Piece /3 Piece
Manual and Actuated
Butterfly valves are used where economical, high capacity valves are needed. Resilient liners provide bubble tight shutoff in general service applications. High-performance butterfly valves provide excellent flow control, and Triple offset metal seated butterfly valves are designed for high pressure and high temperature severe service applications.
Check valves have a disc, ball, or plates that open when forward flow starts in the pipeline. When pressure drops, either gravity, back pressure, or a mechanical spring forces the disc back against its seat to prevent reversal of flow (backflow).
Diaphragm valves have excellent shut-off and flow control characteristics. A flexible molded diaphragm regulates flow, provides tight shutoff, and isolates the fluid from the environment. The valve consists of the body, diaphragm, and handwheel assembly. Their simple design and wide choice of materials make them ideal for corrosive, abrasive, and sanitary services.
Float valves automatically control liquid level and prevent overfilling tanks. The valve is operated mechanically by a float which rests on top of the liquid. As the liquid level rises, it pushes the float up and closes the valve. As the level falls, the valve opens. The amount of liquid pressure the valve can shutoff against is determined by the length of the rod and size of the float.
Gate valves have a sliding wedge or disc which reciprocates into and out of the valve port. These valves are ideal for isolation of general purpose as well as high pressure and high temperature applications where operation is infrequent. Manual operation is accomplished through a multi-turn handwheel assembly.
Globe valves have a conical plug which reciprocates into and out of the valve port. These valves are ideal for metering fluid flow as well as shutoff in high pressure drop and high temperature applications. Available in globe, angle, and y-pattern designs. Manual operation is accomplished through a multi-turn handwheel assembly.
Needle valves have a relatively small conical seat with matching needle-like tapered plug on the end of a finely threaded screw. The fine multi-turn action provides high resolution positioning of the plug relative to the seat making it ideal for regulating fluid flow. Needle valves are ideal for precise flow metering, process dampening, and shutoff applications. Also known as gauge valves, needle valves are commonly used to protect pressure gauges and instruments from pressure spikes by dampening the flow/pressure. Needle valves can be used with pneumatic actuators to control the rate of valve open and close times (speed control).
Plug valves are similar to ball valves except instead of a spherical element, a cylindrical element is used as the internal restriction. Plug valves are typically more expensive than ball valves, but they are inherently more rugged as well. The plug is guided by a sleeve which acts as the sealing member. These valves are available in 2, 3, and 4-way configurations.
Regulators are self-operated valves which use a spring and diaphragm to regulate the flow of fluids to maintain set pressure. Ideal where simple automatic control of pressure, level, and temperature is required. Settings are field adjustable within a specified range.
Relief valves are normally closed and use a spring and diaphragm to monitor process pressure. The valve is designed to lift sufficiently to relieve fluid pressure build-up over setting. These valves help protect vessel and piping system damage from over pressurization.
Strainers are placed in process piping lines to remove large solid contaminants from the flow stream. Stainers help protect valves, pumps, and other expensive equipment against dirt, scale, chips and other sediment. Strainers should always be installed upstream of solenoid valves to prevent clogging of internal passages.