Soft Seal Gate Valve
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Name:

Soft Seal Gate Valve

Category:

Gate valve

Remark:

Gate valve is one of the most widely used valves in various fluid transportation projects. Traditional gate valves generally have phenomena such as easy fluid leakage and serious corrosion of internal parts. In the ordinary soft seal gate valves on the market, the stem shaft seal is easy to leak, and it is impossible to replace the sealing ring under continuous water and at any opening degree.

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Product Description

Gate valve is one of the most widely used valves in various fluid transportation projects. Traditional gate valves generally have phenomena such as easy fluid leakage and serious corrosion of internal parts. In the ordinary soft seal gate valves on the market, the stem shaft seal is easy to leak, and it is impossible to replace the sealing ring under continuous water and at any opening degree.
The elastic seat seal gate valve adopts novel structural design, strict manufacturing technology and high-performance new materials, which overcomes the defects of the traditional gate valve, such as poor sealing, internal parts, especially the gate plate, easy to rust, rubber elastic fatigue and aging, reliable sealing performance, Light and quick operation, simple and convenient maintenance and long service life. Suitable for domestic water systems, water supply and drainage systems, sewage treatment systems, chemical fluid delivery systems, etc., used as a cut-off device on fluid lines in the construction, urban environmental protection, petrochemical, pharmaceutical, food, metallurgy, textile, power and other industries (not Suitable for throttling).


Features
The elastic seat seal gate valve, the main seal is a monolithic gate plate completely covered with rubber, which produces a small amount of adaptive elastic deformation under the action of operating force and water pressure, forming an excellent sealing effect with the precision cast valve seat.

◆ Nodular cast iron shell
The valve body and bonnet are made of ductile iron with high strength and corrosion resistance. The valve seat and valve body are integrally formed by precision casting without any processing.

◆ Full diameter flat bottom runner
When the valve is fully open, the gate completely leaves the flow path, and there is no groove at the bottom of the valve seat, which is not easy to accumulate debris. It is equivalent to a straight pipe and has the lowest flow resistance.

◆ All rubber covered gates
High-performance rubber wraps the skeleton completely, and cast iron is completely isolated from the medium without corrosion. The rubber is softly sealed and firmly knotted with the skeleton, and the whole is formed by hot vulcanization.

◆ Integral copper nut
The gate nut is integrally connected with the skeleton, and there is no movement empty stroke and loose phenomenon. Bronze material, self-lubricating with the valve stem, effectively reduce the operating torque.

◆ Guide rail system
There is a rail system between the valve body and the gate. The bearing water pressure is not offset when the gate is sealed, and the rubber is not contacted and worn when lifting to prevent the valve stem from bending.

◆ Stainless steel stem
Corrosion-resistant stainless steel stem, trapezoidal thread rolling processing, smooth thread wear resistance, effectively reduce operating torque and increase service life.

◆ Double thrust bearing (dark rod type DN≤300)
The stem has double thrust bearings at the neck, and the inverted stem avoids water pressure. Bronze material, self-lubricating with the valve stem, effectively reduce the operating torque.

◆ Valve stem axial seal (dark rod type)
Three O-ring seals, axial self-sealing under the effect of water pressure, without the trouble of packing seal adjustment. The top dust ring prevents external impurities from entering the shaft seal.

◆ Inverted seal structure (dark rod type DN≤300)
The patented inverted seal structure allows the valve to replace the O-ring seal at the gland in emergency situations where water is constantly flowing and at any angular opening.

◆ Medium flange connection
High-strength internal cavity angle screws, hot melt adhesive and valve cover rubber ring are closed, completely isolating the screws from the working medium and the external environment.

◆ Double feet and double rings
For gate valves of all specifications, the valve body is integrally cast with two legs, and the valve cover is integrally cast with two lifting rings, which is convenient for handling and storage.

◆ Non-toxic anti-corrosion coating
The inner and outer surfaces of the valve are electrostatically coated with non-toxic epoxy resin powder, which is corrosion-resistant and long-life, and can be directly used in drinking water, food and pharmaceutical industries.

◆ Diversified operation
The structure has dark rod type and bright rod type. It can be operated by handwheel, T-handle, electric, pneumatic and other devices. The valve position on-site indication, valve position signal output, code lock control, extended operating rod, direct buried device are available.

◆ Convenient installation and construction
With flange, clamp groove, socket, socket, mechanical joint, PE joint and other connection methods, optional telescopic function, convenient connection with cast iron, steel, plastic and other pipelines.


Executive Standard
1. Valve design and manufacturing according to GB / 24924-2010 standards;
2. The length of the valve structure according to the provisions of GB / T12221-2005;
3. Inspection and testing should be consistent with the relevant provisions of GB / T13927-2008;
4. Flange size according to the provisions of GB / T17241.6-2008;



Technical Parameters

Nominal size

DN40~DN800

Suitable media


Clear water, or similar physical and chemical properties of water medium
(Sewage, raw water, hot water, oil medium, please specify)



Operating temperature℃

0-70 (standard configuration) 0-100 (hot water configuration)

Nominal pressure

PN10

PN16

PN25

Work pressure(MPa)

≤1.00

≤1.60

≤2.50

Strength test(MPa)

1.50

2.40

3.75

Seal test(MPa)

1.10

1.76

2.75

Low pressure test(MPa)

0.02

0.02

0.02


Main material

Serial number

name

material

1

Body

QT450

2

Valve plate

QT450+NBR

3

Stem nut

QT450

4

Valve stem

20Cr13

5

Flange seals

NBR

6

cap

QT450

7

O-ring

NBR

8

O-ring

NBR

9

Countersunk head bolt

35#

10

Dust cover

NBR

11

Round head screw

35#

12

Handwheel

QT450

13

Gland

QT450

14

Countersunk head bolt

35#

The main shape and connection dimensions

Nominal diameter

The main dimensions and connection dimensions

L

D

D1

D2

C

F

Z-d

H

Z45X-10Q

40

165

150

110

84

19

3

4-Φ19

240

50

178

165

125

99

19

3

4-Φ19

240

65

190

185

145

118

19

3

4-Φ19

260

80

203

200

160

132

19

3

8-Φ19

275

100

229

220

180

156

19

3

8-Φ19

380

125

254

250

210

184

19

3

8-Φ19

410

150

267

285

240

221

19

3

8-Φ23

435

200

292

340

295

266

20

3

8-Φ23

630

250

330

395

350

319

22

3

12-Φ23

645

300

356

445

400

370

24.5

4

12-Φ23

697

350

381

505

460

429

24.5

4

16-Φ23

802

400

406

565

515

480

24.5

4

16-Φ28

842

450

432

615

565

530

25.5

4

20-Φ28

1060

500

457

670

620

582

26.5

4

20-Φ28

1170

600

508

780

725

682

30

5

20-Φ31

1300

700

610

895

840

794

32.5

5

24-Φ31

1550

800

660

1015

950

901

35

5

24-Φ34

1750

900

711

1115

1050

1001

37.5

5

28-Φ34

1950

1000

811

1230

1160

1112

40

5

28-Φ37

2170

Z45X-16Q

40

165

150

110

84

19

3

4-Φ19

240

50

178

165

125

99

19

3

4-Φ19

240

65

190

185

145

118

19

3

4-Φ19

260

80

203

200

160

132

19

3

8-Φ19

275

100

229

220

180

156

19

3

8-Φ19

380

125

254

250

210

184

19

3

8-Φ19

410

150

267

285

240

221

19

3

8-Φ23

435

200

292

340

295

266

20

3

12-Φ23

630

250

330

405

355

319

22

3

12-Φ28

645

300

356

460

410

370

24.5

4

12-Φ28

697

350

381

520

470

429

26.5

4

16-Φ28

802

400

406

580

525

480

28

4

16-Φ31

842

450

432

640

585

548

30

4

20-Φ31

1060

500

457

715

650

609

31.5

4

20-Φ34

1170

600

508

840

770

720

36

5

20-Φ37

1300

700

610

910

840

794

39.5

5

24-Φ37

1550

800

660

1025

950

901

43

5

24-Φ40

1750

900

711

1125

1050

1001

46.5

5

28-Φ40

1950

1000

811

1255

1170

1112

50

5

28-Φ43

2170


Structure picture


Inquiry

If you have any enquiry about quotation or cooperation,please feel free to email us at info@cnlg-valve.com or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.