Valve

Valve is widely used in the system to cut piping, transfer, or manage the flow of fluida. Operation of the valve can be manually or automatically through a control signal from the instrument. 

Valve is based on a standard pressure and temperature rating in accordance with ANSI / ASME B16.1 for cast iron material, material for steel B16.34, B16.24 for bronze material. 


1 Valve Category 

Stop (Isolation) Valves: Stop valve used to isolate or close the flow of the piping system. Requirements in the design of the main stop valve is a minimal obstacle fluida at the time of the valve in fully open (fully open) and the density is good at the time of valve in the fully closed condition (fully close). Type of valve that complies with this requirement include: Gate, Globe, Ball, Butterfly, Plug, and Diaphragm Valve. 

Regulating Valves: Regulating valve is widely used in the piping system to manage the flow of fluida. The flow can be a controlling flow, pressure, temperature or with the zoom in or out in the flow through the valve responds to signals from the pressure control equipment, flow, or temperature. Terms of the main valve flow controller is the ability to manage the flow of the correct position of the valve and a decrease in pressure (pressure drop) fluida in accordance with the required without any damage. Type of valve that complies with this requirement include: Globe, Needle, Butterfly, Ball, Plug, Diaphragm Valve, and with special design. 

Back - Flow Prevention: In general, Check valve used to prevent the occurrence of reverse flow (back flow). Movement of the disk check valve that is by itself (self-Actuating) where the disk will be open if the flow of fluida direction of flow is determined and close quickly when the flow of going back. In the particular, to help drive pneumatik closing disk check valve in case of reverse flow. 

Pressure-Relief Devices: Pressure-Relief Devices used to protect the piping system and other equipment in case of increased pressure exceeds the design pressure. In general, relief valve equipped with a spring that urges the disk is pressed against the holder (seat) valve. If the style of fluida wedged against the disc valve exceeds the spring wedged style, automatically opens the valve will release the excess pressure fluida. Other types of pressure-relief device that is "rupture disk" is not the type of valve. Rupture disks are designed to open at a specified pressure and have the ability to release the flow of fluida (flow rate) in large numbers. 

Some parameters to consider in selecting the type valve al: 
1. Decrease in pressure (pressure drop) 
2. Level leakage valve holder (seat leakage) 
3. Nature fluida (fluid properties) 
4. Leakage level system (system leakage) 
5. Terms actuation / settings (actuation requirement) 
6. Initial cost (initial cost) 

7. Treatment (maintenance)

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