Gerab National Enterprises have been Gate Valve suppliers in UAE and Middle East for many years. We stock a wide variety of valves and due to our warehousing capabilities in the region, and preferential arrangements as gate valve distributors for some of the world’s most sought-after manufacturers, we are confident that we can supply your project’s requirements entirely to specification, even at short notice.
What is a Gate Valve?
The gate valve derives its name from the presence of a closure component known as a gate, which can stop the flow of fluid through the pipe.
Within the gate valve’s body, there is a vertical disc that moves up and down perpendicular to the pipe’s flow direction. This movement either opens or closes the valve, employing the wedge-lock effect of the disc to block the flow.
Gate valves are ideal for regulating flow by enabling full opening or complete closure. By turning the handle counterclockwise, the disc is raised, allowing the flow to pass through the valve. Conversely, rotating the handle clockwise lowers the disc, restricting the flow.
Parts of a Gate Valve
|
Extended Body |
Body is used for tapping of pressure vessels and header lines for vents, drains, or takeoff lines and instrumentation. |
|
Welded Bonnet |
Often used for gas and toxic flow line application. |
|
O S & Y |
Outside screw and yoke design. Generally used for all gate valves. |
|
Pressure Seal |
On a pressure-seal valve, the higher the body cavity pressure, the greater the force on the gasket. Pressure-seal bonnets are used extensively for high-pressure high-temperature applications, such as the power industry. Pressure-seal valves are much lighter than their corresponding bolted bonnet designs. Due to the pressure energization of the seal ring, they are normally not used in pressure classes below ANSI class 600. |
|
Extended Stem |
Stem extended at bonnet for cryogenic, pressure seal, and subterranean applications. |
|
Raising Stem |
Standard design of the stem where the threading will be in the top portion and gives the drive to move the stem up pulling the wedge, In this case, the female thread will be in the hand wheel. |
|
Non Raising Stem |
This design of stem is used in water applications where the threading is the bottom portion of the stem and gives the drive to move the wedge up, in this case, the female thread will be in the wedge. |
|
Solid Wedge |
One Single solid piece, Most commonly used for small-size gate valves .because of its simplicity and strength. |
|
Flexible Wedged |
By the addition of a groove or slot around its periphery, the flexible disc can adapt to temperature changes and adverse piping stresses without binding. |
|
Renewable seat |
These seats can be replaced easily if required mostly they will be threaded seats. |
|
Integral Seat |
They are machined in the body or welded to the body. |
Types of Gate Valve
|
Size |
Class |
Body |
Bonnet |
Yoke |
Trim |
Ends |
||
|
Stem |
Wedge |
Seat |
||||||
|
1/2 ” to 48″ |
150 , 300 , 600 |
Normal Body |
Bolted Bonnet |
OS & Y |
Normal Stem / |
Solid |
Renewable / |
RF , RTJ , BW , SW , NPT |
Gate Valve Standards
|
Valves Design |
API 600, API 6D ,API 603 , ISO 10434, ASME B16.34 & BS 1414 |
|
End to End Dimensions |
ASME B16.10 & ISO 5752 |
|
Flanged Dimensions |
ASME B16.5 & ISO 7005-1 Part. 1 ASME B16.47 BS 3293 MSS SP-44 |
|
Butt weld Dimensions |
ASME B16.25 |
|
Visual Inspection |
MSS-SP-55 |
|
Pressure Test |
API 598, API 6D, B16.34, ISO 5208, BS 6755 Part. 1 & MSS –SP-61 |
If you’re looking for a reliable gate valve stockist Contact us here for more details.
Valves Type
Valves Range
| Material | Size Range | Class Range | End type range | Standard/Specs |
|---|---|---|---|---|
|
|
|
|