Descrição
900LB Swing Check Valve, 14 Inch, ASTM A216 WCB, API 6D, Pressure Seal Bonnet, Butt Weld Ends
API 6D Pressure Seal Bonnet Swing Check Valve for High-Pressure Pipeline Applications
O 14 Inch Class 900 Swing Check Valve is a premium heavy-duty non-return valve engineered for demanding oil & gas, refinery, petrochemical, offshore, LNG, and power generation applications. Manufactured from ASTM A216 WCB carbon steel, this valve complies with the stringent requirements of API 6D e ASME B16.34, ensuring reliable operation under high-pressure and high-temperature conditions.
Featuring a Pressure Seal Bonnet (PSB) design and Butt Weld (BW) ends, the valve is specifically developed for critical pipeline systems where leakage prevention, operational safety, and long-term durability are essential. The swing disc mechanism automatically prevents reverse flow, protecting expensive equipment such as pumps, compressors, turbines, and process systems.
With its robust construction and low-pressure-loss design, this valve is widely selected for Class 900 pipeline systems across the global energy industry.
Product Overview
Descrição do produto
| Item | Especificação |
|---|---|
| Nome do Produto | Válvula de inspeção |
| Tipo de válvula | Swing Type Non-Return Valve |
| Tamanho | 14 Inch (DN350) |
| Pressure Rating | ASME Class 900 |
| Padrão de projeto | API 6D |
| Pressure-Temperature Standard | ASME B16.34 |
| Face-to-Face | ASME B16.10 |
| Body Material | ASTM A216 WCB |
| Bonnet Type | Pressure Seal Bonnet |
| Terminar conexão | Butt Weld (BW) |
| Inspection Standard | API 598 |
| Projeto seguro contra incêndio | Available |
| NACE Compliance | Available |
| Operação | Automatic |
| Flow Direction | One Direction |
Why Choose a Pressure Seal Bonnet Swing Check Valve?
In high-pressure applications, traditional bolted bonnet designs can become vulnerable to gasket stress and leakage risks.
O Pressure Seal Bonnet (PSB) design utilizes internal line pressure to increase sealing force automatically.
Key Benefits
✔ Enhanced bonnet sealing integrity
✔ Reduced maintenance requirements
✔ Improved safety in critical service
✔ Better performance under thermal cycling
✔ Longer service life
✔ Preferred design for Class 600 and above
As system pressure increases, the bonnet seal becomes tighter, making PSB valves ideal for severe operating environments.
Features & Benefits
Full-Port Flow Design
The swing disc opens fully during operation, creating an unobstructed flow path.
Advantages include:
- Minimal pressure loss
- Reduced turbulence
- Improved flow efficiency
- Lower energy consumption
Heavy-Duty Swing Disc Assembly
The disc is precisely machined and balanced to ensure:
- Smooth operation
- Rapid closure
- Reliable sealing
- Reduced wear
Butt Weld End Connections
BW ends provide a permanent welded connection with significant advantages:
Superior Structural Integrity
Eliminates flange leakage concerns.
Reduced Maintenance
No gasket replacement required.
Improved Safety
Ideal for high-pressure and high-temperature services.
Better Vibration Resistance
Especially suitable for compressor and pump discharge systems.
ASTM A216 WCB Carbon Steel Construction
WCB remains the industry’s most widely used carbon steel casting material.
Benefits include:
- Excellent weldability
- High strength
- Good toughness
- Cost-effective performance
- Suitable for steam, oil, gas, and water service
Technical Design Standards
| Padrão | Descrição |
|---|---|
| API 6D | Pipeline Valves |
| ASME B16.34 | Valve Design |
| ASME B16.10 | Face-to-Face Dimensions |
| ASME B16.25 | Butt Weld Ends |
| API 598 | Inspection & Testing |
| MSS SP-55 | Casting Quality |
| NACEMR0175 | Sour Service Option |
Available Material Options
While this model is supplied in ASTM A216 WCB, other materials are available.
| Body Material | Aplicativo |
|---|---|
| ASTM A216 WCB | General Oil & Gas |
| ASTM A352 LCB | Low Temperature Service |
| ASTM A217 WC6 | High Temperature Steam |
| ASTM A217 WC9 | Elevated Temperature Applications |
| ASTM A351 CF8 | Corrosion Resistant Service |
| ASTM A351 CF8M | Chemical Processing |
| Duplex Stainless Steel | Seawater Applications |
| Super Duplex Stainless Steel | Offshore & Desalination |
Working Principle
The swing check valve operates automatically without external power.
During Forward Flow
- Fluid pressure enters the valve.
- Disc swings open.
- Flow passes with minimal resistance.
During Reverse Flow
- Flow slows or reverses.
- Gravity and reverse pressure move the disc.
- Disc contacts the seat.
- Reverse flow is immediately blocked.
This protects upstream equipment from damage caused by backflow.
Formulários
Oil & Gas Transmission Pipelines
Widely used in:
- Crude oil pipelines
- Natural gas transmission systems
- Compressor stations
- Gathering systems
Refineries
Installed in:
- Process units
- Utility systems
- Distillation facilities
- Hydrocarbon transfer lines
Petrochemical Plants
Suitable for:
- Feedstock systems
- Process piping
- Utility networks
- Chemical processing lines
LNG Facilities
Used in:
- Liquefaction plants
- LNG terminals
- Storage facilities
- Process transfer systems
Offshore Platforms
Commonly installed in:
- Production facilities
- Utility systems
- Export pipelines
- Water injection systems
Power Generation
Suitable for:
- Main steam systems
- Feedwater systems
- Turbine auxiliary piping
- High-pressure utility services
Quality Assurance
Every valve undergoes comprehensive inspection and testing.
Standard Testing Procedures
Hydrostatic Shell Test
Verifies body integrity under pressure.
High-Pressure Seat Test
Confirms sealing performance.
Backflow Simulation Test
Validates disc closure performance.
Material PMI Verification
Confirms alloy chemistry.
Dimensional Inspection
Ensures compliance with design standards.
Visual Examination
Checks casting quality and machining accuracy.
Testing is performed according to:
- API 598
- API 6D
Optional Features
Trim Options
- API Trim 1
- API Trim 5
- API Trim 8
- API Trim 10
- Stellite Hardfaced Seats
Special Service Options
NACEMR0175
For sour gas and H₂S environments.
Projeto seguro contra incêndio
For refinery and offshore installations.
Low Emission Service
For environmentally sensitive applications.
High Temperature Service
Custom trim selections available.
Documentation Available
We can supply:
✅ Product Datasheet
✅ General Arrangement Drawing
✅ Material Test Certificate (EN 10204 3.1)
✅ Hydrostatic Test Certificate
✅ Welding Procedure Qualification Records (WPS/PQR)
✅ NDT Reports
✅ Inspection Release Notes
✅ Installation & Maintenance Manual
Frequently Asked Questions
What is a swing check valve?
A swing check valve is an automatic non-return valve that prevents reverse flow by using a hinged disc that opens and closes based on flow direction.
Why choose API 6D check valves?
API 6D valves are specifically designed for pipeline applications and provide enhanced reliability, safety, and testing requirements.
What are the benefits of a Pressure Seal Bonnet?
Pressure Seal Bonnet designs provide superior sealing performance in Class 600 and higher pressure systems.
Why use BW ends instead of flanges?
Butt Weld connections offer:
- Leak-free operation
- Better structural strength
- Reduced maintenance
- Improved performance under vibration
Is WCB suitable for high-pressure service?
Yes. ASTM A216 WCB is widely used in Class 900 oil & gas, refinery, and power plant applications.
Can this valve be supplied with NACE compliance?
Yes. Full NACE MR0175 compliance can be provided upon request.
Related Products
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- API 6D Trunnion Ball Valve
- Válvula de retenção de disco inclinável
- Axial Flow Check Valve
- Válvula de vedação de pressão
- Pressure Seal Globe Valve
- High Pressure Forged Check Valve
Request a Quote
Trusted China API 6D Swing Check Valve Manufacturer
We offer:
✅ Factory Direct Pricing
✅ Large Diameter Valve Manufacturing
✅ API 6D Certified Production
✅ Fast Delivery Schedules
✅ Third-Party Inspection Support
✅ OEM & Private Label Solutions
✅ Worldwide Export Experience
Send Your RFQ Today
Please provide:
- Valve Size (14″ / DN350)
- Pressure Rating (Class 900)
- Trim Requirements
- Temperatura de operação
- Media Type
- Quantity Required
Our technical sales team will provide a detailed quotation, datasheet, GA drawing, and production schedule within 24 hours.
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