Descrição
LCB Wafer Check Valve, Class 150 LB, 6 Inch
- Composition: Low-carbon cast steel, specifically heat-treated for improved toughness.
- Faixa de temperatura: Ideal for sub-zero environments, handling temperatures ranging from -46°C to 343°C (-50°F to 650°F).
- Formulários: Widely used in the oil & gas industry, petrochemical plants, and cryogenic liquid transfer.
- Wafer Style: Designed to be clamped directly between two pipe flanges, utilizing studs or bolts for a much lighter, smaller footprint compared to flanged check valves.
- Dual Plate / Double Disc: The most common configuration, featuring two spring-loaded semi-circular plates that hinge on a central pin, preventing “slamming” and water hammer.
- Tilting Disc / Nozzle: Alternative designs used for smooth, non-slam operation and minimal pressure drop.
- Pressure Classes: Typically ranges from ASME Class 150 to Class 2500.
- Faixa de tamanho: Commonly manufactured in sizes spanning from 2″ to 48″.
- Padrões: Designed and manufactured in accordance with API 594 e ASME B16.34 guidelines
Low Temperature Carbon Steel Wafer Check Valve for Oil, Gas, and Industrial Pipeline Systems
O LCB Wafer Check Valve, Class 150 LB, 6 Inch (DN150) is a compact, low-temperature carbon steel non-return valve designed to prevent backflow in pipeline systems operating under moderate pressure and low-temperature conditions. Manufactured from ASTM A352 LCB (Low-Temperature Carbon Steel), this valve offers excellent toughness at sub-zero temperatures, reliable sealing performance, and long service life in cryogenic and low-temperature industrial applications.
Designed in accordance with API 594, ASME B16.34, e API 598, the wafer check valve provides efficient flow control protection for pumps, compressors, and downstream equipment in oil & gas, petrochemical, and process industries.
Product Overview
| Item | Especificação |
|---|---|
| Nome do Produto | Válvula de retenção de wafer |
| Tipo de válvula | Dual Plate / Swing Wafer Check Valve |
| Tamanho | 6 Inch (DN150) |
| Pressure Rating | Class 150 LB |
| Body Material | ASTM A352 LCB |
| Disc Material | A352 LCB / SS316 (Optional) |
| Seat Type | Metal Seat / Soft Seat Optional |
| Tipo de conexão | Wafer Type |
| Padrão de projeto | API 594 |
| Face-to-Face | API 594 / Manufacturer Standard |
| Inspection & Testing | API 598 |
| Temperature Range | -46°C to 345°C |
| Applicable Media | Oil, Gas, Water, Steam, Low-Temperature Fluids |
What is ASTM A352 LCB?
ASTM A352 LCB is a low-temperature carbon steel designed for use in applications where materials must maintain toughness and impact resistance at sub-zero temperatures.
Key Properties of LCB
- Excellent low-temperature impact strength
- Good weldability
- Reliable mechanical performance in cold environments
- Suitable for cryogenic and sub-zero service
- Cost-effective compared to stainless steel
LCB is widely used in pipelines exposed to winter conditions, LNG systems (non-critical), and low-temperature industrial environments.
Product Features
Low-Temperature Resistant Construction
LCB material ensures stable performance in:
- Cold climates
- Refrigerated systems
- Low-temperature hydrocarbon service
- Seasonal freezing environments
Wafer Compact Design
The wafer-type structure provides:
- Short face-to-face dimension
- Lightweight construction
- Easy installation between flanges
- Reduced space requirements
- Lower overall system cost
Dual Plate Check Mechanism (Optional)
For improved performance, dual plate design offers:
- Faster closing response
- Reduced water hammer effect
- Lower pressure drop
- Improved flow efficiency
- Longer service life
Class 150 Pressure Rating
Suitable for medium-pressure pipeline systems such as:
- Utility piping
- Oil and gas transport lines
- Cooling water systems
- Process pipelines
- Pump discharge protection
Especificações técnicas
Materials of Construction
| Component | Material |
|---|---|
| Corpo | ASTM A352 LCB |
| Disco | A352 LCB / SS316 |
| Assento | EPDM / NBR / Metal Seat |
| Primavera | SS316 / Inconel (Optional) |
| Haste | SS410 / SS304 |
| Junta | Graphite / PTFE |
Applicable Standards
| Padrão | Descrição |
|---|---|
| API 594 | Check Valve Design |
| ASME B16.34 | Pressure Design |
| API 598 | Inspection & Testing |
| MSS SP-55 | Quality Requirements |
| NACEMR0175 | Optional |
Working Principle
The wafer check valve operates automatically based on flow direction.
Forward Flow
- Fluid enters the valve.
- Pressure forces the disc(s) open.
- Flow passes with minimal resistance.
Reverse Flow
- Flow reverses direction.
- Disc closes immediately under gravity/spring force.
- Backflow is blocked.
- Equipment is protected from damage.
Typical Applications
Oil & Gas Industry
Used in:
- Pipeline protection systems
- Pump discharge lines
- Compressor stations
- Refinery utility systems
Oil & Gas Application
Petrochemical Plants
Suitable for:
- Process pipelines
- Hydrocarbon transfer systems
- Utility services
- Cooling circuits
Low-Temperature Industrial Systems
Used in:
- Cold climate pipelines
- Refrigeration systems
- Seasonal outdoor installations
- Industrial utility systems
Water and Steam Systems
Applied in:
- Cooling water lines
- Boiler auxiliary systems
- Pump protection lines
- HVAC piping systems
Advantages of LCB Wafer Check Valve
| Feature | Benefit |
|---|---|
| LCB Material | Low-temperature toughness |
| Wafer Design | Compact and lightweight |
| Class 150 Rating | Standard industrial pressure |
| Fast Closure | Reduced backflow risk |
| Baixa queda de pressão | Efficient flow |
| Cost Effective | Lower material cost |
LCB vs LCC Check Valve
| Property | LCB | LCC |
|---|---|---|
| Carbon Content | Médio | Lower |
| Low-Temperature Performance | Good | Excellent |
| Cost | Lower | Higher |
| Toughness | Good | Better |
| Typical Use | Standard low-temp | Cryogenic service |
LCB is widely used for general low-temperature service where extreme cryogenic conditions are not required.
Inspection and Testing
Each valve undergoes strict quality control:
Hydrostatic Test
Ensures body strength and sealing integrity.
Seat Leakage Test
Verifies backflow prevention performance.
PMI Testing
Confirms ASTM A352 LCB material composition.
Dimensional Inspection
Ensures compliance with API 594 standards.
Functional Test
Validates disc movement and closure response.
Optional Features
Seat Options
- Metal Seat
- EPDM Soft Seat
- NBR Seat
- Assento PTFE
Disc Options
- Single Plate
- Dual Plate (Wafer Type)
Certifications
- EN 10204 3.1
- NACEMR0175
- Third-Party Inspection (SGS, BV, DNV, TUV)
Frequently Asked Questions
What is ASTM A352 LCB used for?
It is used in low-temperature service applications requiring good toughness and impact resistance.
Is wafer check valve suitable for vertical installation?
Yes, depending on flow direction and design, it can be installed horizontally or vertically.
What is the advantage of wafer design?
It reduces installation space, weight, and cost compared to flanged check valves.
Can this valve handle cryogenic service?
LCB is suitable for low-temperature service, but for cryogenic applications, LCC or stainless steel is preferred.
Which industries use LCB wafer check valves?
Oil & gas, petrochemical, water systems, and industrial process plants.
Request a Quote
China LCB Wafer Check Valve Manufacturer
We provide:
✅ ASTM A352 LCB Low-Temperature Solutions
✅ API 594 Wafer Check Valve Manufacturing
✅ Class 150 Industrial Valve Supply
✅ OEM & Custom Engineering Support
✅ Third-Party Inspection Available
✅ Global Export Experience
Please provide:
- Size (6 Inch / DN150)
- Pressure Rating (Class 150)
- Seat Type Requirement
- Temperatura de operação
- Media Type
- Quantity Required
Our engineering team will provide a detailed quotation, technical datasheet, GA drawing, and delivery schedule within 24 hours.
