gate valve
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#1
20-09-2008, 10:28 PM


A gate valve is a valve that opens by lifting a round or rectangular gate out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar. The gate faces can form a wedge shape or they can be parallel. Gate valves are sometimes used for regulating flow, but many are not suited for that purpose, having been designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.


Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of valve position. Nonrising stems are used where vertical space is limited or underground.

Bonnets provide leakproof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.

Another type of bonnet construction in a gate valve is pressure seal bonnet. This construction is adopted for valves for high pressure service, typically in excess of 2250 psi. The unique feature about the pressure seal bonnet is that the body - bonnet joints seals improves as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint
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#2
27-07-2012, 11:09 PM

project and implimentation on get value. i want all the about project and implimentation
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#3
16-09-2013, 11:45 AM

happy birth day to u many more happy returns of the day
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#4
18-09-2013, 10:55 AM

To get full information or details of gate valve please have a look on the pages

topicideashow-to-gate-valve

if you again feel trouble on gate valve please reply in that page and ask specific fields in gate valve
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#5
25-09-2013, 01:28 PM

sir plz give us a simple project and implimentation regarding optical communication.......
reply urgent..
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#6
26-09-2013, 09:37 AM

To get full information or details of gate valve please have a look on the pages

topicideashow-to-gate-valve

if you again feel trouble on gate valve please reply in that page and ask specific fields in gate valve
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#7
30-09-2013, 12:06 PM

i want a project and implimentation report on ratio analysis of iffco
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