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The GB Wedge Gate Valve

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.


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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