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Valves(1) |
Valves general
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What are Valves? Valves are mechanical devices that controls the flow and pressure within a system or process .. |
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Valve pressure classes ASME B16.34 The pressure class is a guideline and dimensionless number to define the pressure and temperature values at which valves of any type of valve can operate .. |
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Trim of Valves The removable and replaceable valve internal parts that come in contact with the flow medium are collectively termed as Valve trim .. |
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Hard-facing valve parts Hardfacing is a metalworking process in which harder material is applied to delicate surfaces to reduce such damage .. |
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Valve Types
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Gate valve Gate valves are primarily designed to start or stop flow, and when a straight-line flow of fluid and minimum flow restriction are needed. In service, these valves generally are either fully open or fully closed .. |
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Globe valve A Globe valve is a linear motion valve and are primarily designed to stop, start and regulate flow. The disk of a Globe valve can be totally removed from the flowpath or it can completely close the flowpath .. |
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Ball valve A Ball valve is a quarter-turn rotational motion valve that uses a ball-shaped disk to stop or start flow .. |
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Plug valve A Plug Valve is a quarter-turn rotational motion Valve that use a tapered or cylindrical plug to stop or start flow .. |
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Butterfly valve A Butterfly valve is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow .. |
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Check valve Check valves are automatic valves that open with forward flow and close with backward flow. A common other name for check valve is Non Return Valve (NRV) .. |
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Non-slam check valve Non-slam check valves are non-return valves used to prevent reverse flow of fluid. These valves are also intended to eliminate or reduce water hammer and its associated effects .. |
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Rising Stem Gate Valve vs Non-Rising Stem Gate Valve There are mainly two types of gate valves on the market: the valve with rising stem and the valve without rising stem .. |
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Bellow Sealed Valve There are two main types of bellow.. the Forged Bellow and the Welded Bellow. Formed-type bellows are made from rolling a flat sheet (thin wall foil) into a tube which is then longitudinally fusion welded .. |
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Pressure Seal valve Pressure seal construction is adopted for valves for high pressure service, typically in excess of above 170 bar .. |
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Breather valve Breather Valves, also known as direct acting Pressure/Vacuum Relief Valves, are special types of Relief Valves which are specifically designed for tank protection .. |
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Air valve Air valves play a crucial role in pumping stations and pipelines. They ensure proper flow of water and wastewater, and essentially allow a system to breathe when necessary .. |
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ORBiT valve Every ORBIT valve incorporates a proven tilt and turn operation that eliminates seal rubbing, which is the primary cause of valve failure .. |
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Knife Gate Valve Knife gate valves are specially designed for on-off and isolation in systems with high dissolved solids content .. |
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Fire-safe Valve Fire-safe valves require a method for evaluating the performance of valves when exposed to certain fire conditions .. |
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Parallel slide gate valve Parallel gate valves are widely used in high pressure and high temperature applications such as steam and feed water .. |
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