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

Its drive device can be provided according to customer’s requirements, otherwise unspecified, a hand wheel drive.
The upper stem nut keeps the valve stand still in the open position even without the hand wheel.
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.
The sealing design ensures the reliable packing-tight in the state of fully open. Discourage the replacement of packing with pressure.
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

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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.）