The GB Wedge Gate Valve

Byroot

Introduction of The GB Wedge Gate Valve

Gate valve，for its low fluid resistance, a minor pressure differential, the flow direction maintenance ability, erosion endured sealing surface and flow noninterference, can be applied with a wide range of pressure and temperature. As a common block valve, it is widely used in the oil media of petroleum, chemical, fossil-fuel power plants and in the steam pipelines. Its main role is to connect or cut off the medium in the pipeline, but it can not be used as a throttle valve.

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Specifications of the GB Wedge Gate Valve

DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN350, DN400, DN450, DN500, DN600, DN700, DN800, DN900, DN1000.

Structural Features of the GB Wedge Gate Valve

  1. Its drive device can be provided according to customer’s requirements, otherwise unspecified, a hand wheel drive.
  2. The upper stem nut keeps the valve stand still in the open position even without the hand wheel.
  3. The packing is made of flexible graphite material with reliable sealing performance. Specified as it is by the customer, offer the packing spacer ring and grease filling structure.
  4. The sealing design ensures the reliable packing-tight in the state of fully open. Discourage the replacement of packing with pressure.
  5. Between the elevating stem and gate plate is a T-groove connection, of which the head is integral forging to ensure an adequate connection strength.

Material Specifications of the Steel Wedge Gate Valve

No.NameCarbon Steel SeriesStainless Steel SeriesAlloy Steel SeriesCryogenic Steel Series
1BodyWCBCF8WC6LCB
2WedgeWCBCF8WC6LCB
3Stem1Cr130Cr18Ni9（304）25Cr2Mo1VA（F22）0Cr18Ni9（304）
4GasketGraphite+SS304
5BonnetWCBCF8WC6LCB
6Nut35#0Cr18Ni9（304）35CrMoA0Cr18Ni9（304）
7Stud35CrMoA0Cr18Ni9（304）25Cr2MoV0Cr18Ni9（304）
8Back Seat1Cr130Cr18Ni9（304）0Cr18Ni9（304）0Cr18Ni9（304）
9PackingGraphiteGraphite/PTFE
10Pin35#0Cr18Ni9（304）1Cr130Cr18Ni9（304）
11Eyebolt35CrMoA0Cr18Ni9（304）350Cr18Ni9（304）
12Eyebolt Nut35#0Cr18Ni9（304）35CrMoA0Cr18Ni9（304）
13Packing Bushing1Cr130Cr18Ni9（304）1Cr130Cr18Ni9（304）
14GlandWCBCF8WCBLCB
15Stem nutZCuAI10Fe3ZCuAI10Fe3ZCuAI10Fe3ZCuAI10Fe3
16Stem Nut Retainer350Cr18Ni9（304）350Cr18Ni9（304）
17HandwheelQT400-17QT400-17QT400-17QT400-17
18Handwheel Nut35#0Cr18Ni9（304）350Cr18Ni9（304）

Specifications for Technical Performance Parameters of the GB Wedge Gate Valve

The design standardGB/T 12234
The pressure-temperature ratingGB/T 12234
The structural lengthGB/T 12234、GB/T 15188.1
The flange dimensionGB/T 9113、JB/T 79
The butt welded jointGB/T 12234
The test and trailJB/T 9092, GB/T 13927
The nominal pressure ratingPN1.6PN2.5PN4.0PN6.4PN10.0PN16.0PN20.0
The pressure testThe shell test2.43.756.09.615.024.030.0
The high pressure seal-ability1.762.754.47.0411.017.622.0
The low pressure seal-ability0.60.60.60.60.60.60.6
The temperature range-196℃~550℃（Choose temperature-matched material.）
The media optionwater, oil, gas and corrosive medium（Choose media-matched material.）

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