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Water seal globe valve

    Water seal globe valve

    The Water Seal Globe Valve is a high-performance industrial valve designed for precise flow control and reliable leak prevention in liquid pipeline systems. Featuring an advanced water-sealed mechanism, it ensures tight shut-off and minimal leakage, making it ideal for water treatment plants, chemical processing, power generation, and industrial fluid systems. Its durable construction, smooth operation, and compliance with API and ASME standards provide long-lasting reliability, enhanced safety, and efficient system performance.
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Features

1.The opening and closing parts of the plug-type,small opening flow to the  maximum to meet the sysem requirements;

2.The speaial water-sealing srucure of the packing chamber design,acoess to  water of 0.6~1.0MPa,isolated from the system and the atmosphere,so that the  system has exoellent airtightness,to prevent decine in the degree of vacuum due  to leakage generated;

3.The housing precision casting process,the appearance of smooth,uniform  organization meet the requirements of high voltage;

4.Speaial materials paired ensure sealing surface high hardness and    hardness,precision grinding,smooth as a miror,wear and corosion,and     effecively extend the service life;

5.Back seal design to effedively protect the seal fill to eliminate Paomaodilou;

6.High-pressure water intensit,high-pressure gas mid,non-destucive tesing and  other mult-channel detecion and full ontol of the qualty of seel castings

7.The stem surface precision grinding,ant-abrasion,effedively alleviate the  opening and dosing moments,easier operation;

8.Special corrosion and packing stucure design,temperature and pressure,non-comosive,automatic lubrication,reduce the opening and closing friction,avoid oomosion of the stem surfaoe,thereby eliminating leakage;

9.Stidly by hand with research,to ensure that the sealing surface of the goodness of ft of  90%or more,fadtory sealed bubble level detedion.


Technical data

公称压力PN(MPa) Nominal Pressure

16

25

40

64

100

强度试验

Strength test

2.4

3.75

6.0

9.6

15

密封试验 Seal test

1.76

2.8

4.4

7.2

11

上密封试验

The seal test

 

1.76

 

2.8

 

4.4

 

7.2

11

气体密封试验 Gas seal test

0.5~0.7



Technical specification

设计标准

Design standards

GB/T 12235

结构长度

Length structure

GB/T 12221

焊接坡口尺寸

Welding groove dimensions

JB/T 359

检验与试验

Inspection testing

JB/T 9092

压力温度等级

Pressure temperature rating

GB   9113


Meterial of main parts

零件名称 Part name

碳钢型Carbon steel type

合金钢型Alloy steel type

阀体、阀架

Body,valve rack

25   WCB

 

WC6     ZGCr5Mo

阀杆Stem

 

2Cr13

 

38CrMoAIA     20Cr1Mo1V1A

阀瓣Disc

25+D507/D802

 

12Cr1MoV+D802

螺栓Bolt

 

3535CrMoA

 

25Cr2MoVA

阀杆螺母Stem nut

QAI9-4

手轮Handwheel

可锻铸铁Malleable iron

填料Packing

柔性石墨Flexible graphite

适用介质

Suitable Mediums

电厂汽机真空冷凝系统等Power plant turbine vacuum condensing system

适用温度℃

Working Temperature

425℃

550℃


Main  dimensions  and  weight


PN(MPa)

 

DN(mm)

 

L

 

D

 

D1

 

α

 

L1

 

H

 

D0

重量(Kg) Weight

 

 

 

 

 

 

 

 

 

 

2.5

10

130

36

18.5

-

10

256

120

4.8

15

130

36

22.5

-

10

257

120

5.0

20

150

44

28.5

-

11

267

140

7.3

25

160

44

34.5

-

12

269

140

8.2

32

180

48

34

30°30'

-

255

180

12

40

200

55

40

30°30'

-

295

200

15

50

230

64

48

30°30'

-

354

250

25

65

290

82

66

30°30'

-

400

250

38.5

80

310

94

78

30°30'

-

425

300

49

100

350

117

100

30°30'

-

468

350

64

125

400

144

126

30°30'

-

475

400

83

150

480

170

150

30°30'

-

611

400

94

200

600

220

202

30°30'

-

721

400

152

 

 

 

 

 

 

 

 

 

4.0

10

130

38

18.4

-

10

255

120

5.3

15

130

38

22.5

-

10

257

120

5.7

20

150

47

28.5

-

11

267

140

7.6

25

160

47

34.5

-

12

270

160

8.8

32

180

53

34

30°30'

-

257

160

13.2

40

200

57

40

30°30'

-

297

200

16.5

50

230

68

48

30°30'

-

354

250

26

65

290

85

66

30°30'

-

405

280

41.3

80

310

98

78

30°30'

 

-

427

320

51.5

100

350

122

100

30°30'

-

470

350

69

125

400

148

124

30°30'

-

475

400

89

150

480

176

148

-

10

614

400

98

 

 

 

 

 

 

 

 

6.4

10

130

38

18.4

-

10

255

140

6

15

130

38

22.5

-

11

257

140

6.4

20

150

47

28.5

-

12

269

160

8.4

25

160

47

34.5

30°30'

-

273

180

9.6

32

180

53

33

30°30'

-

259

200

23

40

260

57

39

30°30'

 

-

297

250

34

50

300

70

48

30°30'

-

356

280

46

65

340

86

65

30°30'

 

-

405

320

67

80

380

100

76

30°30'

-

429

360

85

100

430

124

98

30°30'

-

477

400

97


Water Seal Globe valve: Safety, Maintenance, Packaging, and Performance Testing

Introduction

The Water Seal Globe Valve is a specialized industrial valve designed to provide tight shut-off and precise flow control in pipelines carrying water, steam, chemicals, and other industrial fluids. Its unique water-seal mechanism prevents leakage and enhances sealing performance, making it highly suitable for power plants, chemical processing, water treatment, and oil & gas industries.

This article provides a professional overview covering safety instructions, troubleshooting and repair, packaging and shipping details, and performance testing requirements. The content is structured to meet Google SEO optimization standards, ensuring clarity, professionalism, and strong keyword relevance for international B2B markets.


Safety Instructions for Water Seal Globe Valve

Proper safety procedures are crucial to ensure long-term operation and worker protection when handling water seal globe valves.

1. General Safety Guidelines

  • Always verify the valve specifications (pressure, temperature, and material compatibility) before installation.

  • Ensure that pipeline pressure is released before performing maintenance or disassembly.

  • Use personal protective equipment (PPE) such as gloves, safety goggles, and protective clothing when handling valves with corrosive fluids.

  • Never exceed the manufacturer’s rated working pressure and temperature limits.

2. Installation Safety

  • Confirm that the flow direction arrow on the valve body matches the pipeline’s flow direction.

  • Install valves in a clean, debris-free system to prevent sealing surface damage.

  • Use proper lifting equipment when handling valves over 50 kg to avoid injury.

3. Operational Safety

  • Open and close the valve slowly to reduce water hammer and pressure shock.

  • Periodically check for leakage around the water seal chamber.

  • In case of irregular operation, immediately isolate the valve from the pipeline system.


Water seal globe valve

Troubleshooting and Maintenance

Even high-quality valves may require periodic maintenance to ensure reliability and efficiency.

1. Common Faults and Solutions

FaultPossible CauseSolution
Leakage at the seatWorn or damaged sealing surfaceRegrind or replace seat/disc
Leakage at water seal chamberLow water level or damaged sealRefill water chamber or replace seal
Valve stem jammingDebris in valve body or corrosionClean internal components, lubricate stem
Reduced flowForeign particles obstructing valve passageFlush pipeline and clean valve interior

2. Preventive Maintenance Schedule

  • Monthly: Inspect for external leaks and verify water seal chamber integrity.

  • Quarterly: Check sealing surfaces, lubricate stem threads, and clean bonnet.

  • Annually: Conduct a hydrostatic test to confirm pressure resistance.


Packaging and Shipping Information

Proper packaging is critical to protect water seal globe valves during long-distance transport and storage.

1. Standard Packaging

  • Wooden crates or fumigated pallets for export shipments.

  • Protective end caps on flanges to prevent entry of dust or foreign particles.

  • Anti-rust oil coating applied to internal surfaces for corrosion protection.

  • Shock-absorbing padding to avoid mechanical damage.

2. Shipping Guidelines

  • Handle with forklifts or cranes using designated lifting points.

  • Store valves in a dry, well-ventilated warehouse away from direct sunlight.

  • Maintain upright storage to protect the water seal chamber.


Performance Testing of Water Seal Globe Valve

To ensure operational reliability and compliance with international standards, every water seal globe valve undergoes strict performance testing.

1. Testing Standards

  • API 598: Valve inspection and pressure testing

  • ASME B16.34: Pressure-temperature rating compliance

  • ISO 5208: Pressure test requirements for metallic valves

2. Key Performance Tests

Test TypePurposeProcedure
Hydrostatic TestVerify body strengthPressurize with water at 1.5x rated pressure
Seat Leakage TestEnsure tight sealingApply rated pressure, check for leakage
Functional TestConfirm opening/closing performanceOperate handwheel or actuator under pressure
Water Seal Chamber TestVerify zero leakage at water sealMaintain water chamber level, check sealing integrity

3. Quality Control Benefits

  • Guarantees leak-free operation in critical systems

  • Reduces maintenance costs by identifying defects early

  • Provides documentation for end-user assurance and compliance


Advantages of Water Seal Globe Valve

FeatureBenefit
Water-seal mechanismEnhanced sealing and zero leakage
Durable constructionLong service life under high pressure
Corrosion-resistant materialsSuitable for chemical and water treatment industries
Precision flow controlStable throttling and regulation
International standard complianceEnsures reliability and safety

Conclusion

The Water Seal Globe Valve is an essential component for industries requiring leak-proof, reliable, and precise flow control solutions. With its advanced sealing design, certified performance tests, robust packaging, and comprehensive maintenance guidelines, it ensures safe, long-term operation in demanding environments.

By following the outlined safety instructions, troubleshooting methods, and performance verification procedures, industries such as power generation, water treatment, and petrochemical processing can achieve optimal efficiency and reliability.

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