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

Even high-quality valves may require periodic maintenance to ensure reliability and efficiency.
| Fault | Possible Cause | Solution |
|---|---|---|
| Leakage at the seat | Worn or damaged sealing surface | Regrind or replace seat/disc |
| Leakage at water seal chamber | Low water level or damaged seal | Refill water chamber or replace seal |
| Valve stem jamming | Debris in valve body or corrosion | Clean internal components, lubricate stem |
| Reduced flow | Foreign particles obstructing valve passage | Flush pipeline and clean valve interior |
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.
Proper packaging is critical to protect water seal globe valves during long-distance transport and storage.
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.
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.
To ensure operational reliability and compliance with international standards, every water seal globe valve undergoes strict performance testing.
API 598: Valve inspection and pressure testing
ASME B16.34: Pressure-temperature rating compliance
ISO 5208: Pressure test requirements for metallic valves
| Test Type | Purpose | Procedure |
|---|---|---|
| Hydrostatic Test | Verify body strength | Pressurize with water at 1.5x rated pressure |
| Seat Leakage Test | Ensure tight sealing | Apply rated pressure, check for leakage |
| Functional Test | Confirm opening/closing performance | Operate handwheel or actuator under pressure |
| Water Seal Chamber Test | Verify zero leakage at water seal | Maintain water chamber level, check sealing integrity |
Guarantees leak-free operation in critical systems
Reduces maintenance costs by identifying defects early
Provides documentation for end-user assurance and compliance
| Feature | Benefit |
|---|---|
| Water-seal mechanism | Enhanced sealing and zero leakage |
| Durable construction | Long service life under high pressure |
| Corrosion-resistant materials | Suitable for chemical and water treatment industries |
| Precision flow control | Stable throttling and regulation |
| International standard compliance | Ensures reliability and safety |
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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