The GB Wedge Gate Valvelug type butterfly valve

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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.

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. Name Carbon Steel Series Stainless Steel Series Alloy Steel Series Cryogenic Steel Series
1 Body WCB CF8 WC6 LCB
2 Wedge WCB CF8 WC6 LCB
3 Stem 1Cr13 0Cr18Ni9（304） 25Cr2Mo1VA（F22） 0Cr18Ni9（304）
4 Gasket Graphite+SS304
5 Bonnet WCB CF8 WC6 LCB
6 Nut 35# 0Cr18Ni9（304） 35CrMoA 0Cr18Ni9（304）
7 Stud 35CrMoA 0Cr18Ni9（304） 25Cr2MoV 0Cr18Ni9（304）
8 Back Seat 1Cr13 0Cr18Ni9（304） 0Cr18Ni9（304） 0Cr18Ni9（304）
9 Packing Graphite Graphite/PTFE
10 Pin 35# 0Cr18Ni9（304） 1Cr13 0Cr18Ni9（304）
11 Eyebolt 35CrMoA 0Cr18Ni9（304） 35 0Cr18Ni9（304）
12 Eyebolt Nut 35# 0Cr18Ni9（304） 35CrMoA 0Cr18Ni9（304）
13 Packing Bushing 1Cr13 0Cr18Ni9（304） 1Cr13 0Cr18Ni9（304）
14 Gland WCB CF8 WCB LCB
15 Stem nut ZCuAI10Fe3 ZCuAI10Fe3 ZCuAI10Fe3 ZCuAI10Fe3
16 Stem Nut Retainer 35 0Cr18Ni9（304） 35 0Cr18Ni9（304）
17 Handwheel QT400-17 QT400-17 QT400-17 QT400-17
18 Handwheel Nut 35# 0Cr18Ni9（304） 35 0Cr18Ni9（304）

Specifications for Technical Performance Parameters of the GB Wedge Gate Valve

The design standard

GB/T 12234

The pressure-temperature rating

GB/T 12234

The structural length

GB/T 12234、GB/T 15188.1

The flange dimension

GB/T 9113、JB/T 79

The butt welded joint

GB/T 12234

The test and trail

JB/T 9092, GB/T 13927

The nominal pressure rating

PN1.6

PN2.5

PN4.0

PN6.4

PN10.0

PN16.0

PN20.0

The pressure test

The shell test

2.4

3.75

6.0

9.6

15.0

24.0

30.0

The high pressure seal-ability

1.76

2.75

4.4

7.04

11.0

17.6

22.0

The low pressure seal-ability

0.6

0.6

0.6

0.6

0.6

0.6

0.6

The temperature range

-196℃~550℃（Choose temperature-matched material.）

The media option

water, oil, gas and corrosive medium（Choose media-matched material.）

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