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Polished 4 Inch Gate Valve Class 150 CF8 Flanged End Gate Valve For Air / Water

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Polished 4 Inch Gate Valve Class 150 CF8 Flanged End Gate Valve For Air / Water
Latest company news about Polished 4 Inch Gate Valve Class 150 CF8 Flanged End Gate Valve For Air / Water

4 Inch Gate Valve Class 150 Flanged End Gate Valve For Air / Water

 

What is Gate Valve?

 

A gate valve can be defined as a type of valve that used a gate or wedge type disk and the disk moves perpendicular to flow to start or stop the fluid flow in piping.

A gate valve is the most common type of valve used in any process plant. It is a linear motion valve used to start or stop fluid flow. In service, these valves are either in a fully open or fully closed position.

When the gate valve is fully open, the disk of a gate valve is completely removed from the flow. Therefore virtually no resistance to flow. Due to this very little pressure drops when fluid passes through a gate valve.

To achieve proper sealing, when the valve is fully closed, 360° surface contact is required between disk and seats.

Gate valves should not be used for regulation or throttling of flow because accurate control is not possible.

The high velocity of the flow in the partially open valve may cause erosion of the disc and seating surfaces and also creates vibration and noise.

 

Valve Type CS / SS GATE VALVE - FL / BW
Design Std BS EN ISO 10434 [BS 1414] / API 600 / API 602 / API 603/ASME B16.34
Size Range 40 DN to 400 DN [1 1/2” to 16”]
Body [CS - ASTM A 216 Gr. WCB] [SS - ASTM A 351 Gr.CF8 / CF8M]
Trim AISI 410 / 304 / 316
Seat / Wedge 13% Cr. Steel / AISI 410 / 304 / 316
Design Features Bolted Bonnet, OS & YT, HW & Gear operated
Prorating ASME - Class 150 / 300 / 600
Face to Face ASME B 16.10 / EN 558 -1 / API 6D
End Connection Flanged ASME B16.5, CLASS 150 / 300 / 600
Butt weld ASME B16.25
Testing Std. BS EN 12266 - 1 [BS 6755-1] / API 598
Optional Lantern Ring / indicator & Locking Device/ Renewable Seat / Stellite Hard facing / Jacketed Provision / RTJ Flanges / By Pass Arrangement / Higher Sizes / Special MOC: Austenitic and Duplex Stainless Steels

 

PN DN Size(mm)
L D D1 D2 B N-φ H
1.6MPa 25 160 115 85 65 14 4-14 275
32 180 135 100 78 16 4-18 280
40 200 145 110 85 16 4-18 330
50 230 160 125 100 16 4-18 350
65 290 180 145 120 18 4-18 370
80 310 195 160 135 20 8-18 400
100 350 215 180 155 20 8-18 415
125 400 245 210 185 22 8-18 460
150 480 280 240 210 24 8-23 510
200 550 335 295 265 26 12-23 710
250 650 405 355 320 30 12-25 786
300 750 460 410 375 30 12-25 925

 

Types of Gate Valves

 

There are three ways to classify the gate valve.

  1. Types of Disk

    1. Solid taper wedge

    2. Flexible wedge

    3. Split wedge or Parallel disks Valve

  2. Types of Body Bonnet Joint

    1. Screwed Bonnet

    2. Bolted-Bonnet

    3. Welded-Bonnet

    4. Pressure-Seal Bonnet

  3. Types of Stem movement

    1. Rising Stem or OS & Y Type (Outside Stem and Screw Type)

    2. Non-rising Stem type

Gate Valve Applications

  • Gate valves are used in almost all fluid services such as air, fuel gas, feedwater, steam, lube oil, hydrocarbon, and all most any services.

  • Some special gate valve is used in slurry and powder product also such as knife gate valve

Advantages of Gate Valve

  • Gate valve provides good

  • Pressure drop during operation is very less.

  • Most of the gate valve can be used as bi-directional

  • They are suitable for high pressure and temperature application and required less maintenance

Types of gate valve based on body, bonnet connection

 

latest company news about Polished 4 Inch Gate Valve Class 150 CF8 Flanged End Gate Valve For Air / Water  0

1st is screwed bonnet: This is the simplest design available and it is used for inexpensive valves.

 

2nd is bolted-bonnet: This is the most popular design and used in a large number of gate valves.

This requires a gasket to seal the joint between the body and bonnet.

 

3rd is Welded-Bonnet: This is a popular design where disassembly is not required. They are lighter

in weight than there bolted-bonnet counterparts.

 

4th one is Pressure-Seal Bonnet: This type is used extensively for high-pressure high-temperature

applications. The higher the body cavity pressure, the greater the force on the gasket in a pressure -seal valve.

Pub Time : 2021-08-06 11:33:56 >> News list
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