Design and manufacturing:GB/T 12236, API 6D, ASME B16.34
The structural length:GB/T 12221, ASME B16.10
Connection forms: HG/T 20592-20605, GB/T 9112-9124, ASME B16.5
Inspection and test:API 598, GB/T 13927
Caliber:1/2″ ~ 50″ (DN15 ~ DN1250)
Pressure temporature level: GB/T 12224, ASME B16.34
Drive mode:Manual, worm gear, pneumatic, electric, hydraulic etc
Pressure: PN2.5MPa-PN42.0MPa Class150-Class2500
Operating Mechanism (Drive Mode)
• Self-Operating: Check valves are typically self-operated based on the flow of the fluid in the system. No manual or powered actuation is required.
• Optional Actuation: Some swing check valves can be equipped with manual overrides or assisted closing mechanisms (e.g., pneumatic or hydraulic dampers) for certain applications.
Materials
• Body Material Options:
o Carbon Steel, Cast Steel, Stainless Steel (304, 316, 316L)
o Ductile Iron, Alloy Steel for high-temperature and high-pressure applications
• Seat Materials:
o Soft Seals: PTFE, EPDM for low and medium temperature applications
o Metal-to-Metal Seals: Stainless Steel, Inconel for high-temperature and high-pressure applications
Certifications
• Compliance: API, ISO 9001, CE, PED certifications for pressure-containing equipment.
• Optional Explosion-Proof Certification: Available for applications in hazardous environments, particularly where valves may need to integrate with automated systems.
• Swing Type Design: Swing check valves (e.g., TG071, TG072, TG073) feature a hinged disc that swings open when the fluid flows forward and closes when flow reverses. This design provides efficient backflow prevention with minimal flow resistance.
• Lift Type Design: Lift check valves (e.g., TG070) use a disc that lifts to allow fluid flow and lowers to block reverse flow. This design is suitable for vertical applications where gravity aids in closing the valve.
• High-Pressure Capability: Models such as the TG074 High-Pressure Swing Check Valve are designed for high-pressure pipelines, offering secure backflow prevention even in extreme conditions.
• Large Diameter Applications: Large diameter check valves (e.g., TG066, TG067) are ideal for systems with high flow volumes and larger pipe sizes, providing reliable backflow prevention with minimal flow loss.
• Vertical Design: Vertical check valves (TG075, TG076, TG077) are ideal for systems where space is limited, and the flow direction is upward, such as in pump discharge lines.
Design and Manufacturing Standards
• Design and Manufacturing: GB/T 12236, API 6D, ASME B16.34 (Covers the design and safety of check valves)
• Valve Type: Check Valves (Including swing, lift, and vertical configurations)
Structural Length
• Standard: GB/T 12221, ASME B16.10
Connection Forms
• Standards:
o Flanged Connections: HG/T 20592-20605, GB/T 9112-9124, ASME B16.5
o Threaded Connections: BSP, NPT, ISO 7-1
o Welded Connections: ASME B16.25
Inspection and Test Standards
• Standard: API 598, GB/T 13927 (Covers pressure testing, sealing, and functional performance of check valves)
Available Sizes (Caliber)
• Range: 1/2″ ~ 50″ (DN15 ~ DN1250)
Pressure-Temperature Rating
• Standard: GB/T 12224, ASME B16.34
• Pressure Range:
o PN2.5 MPa ~ PN42 MPa
o Class 150 ~ Class 2500
• Temperature Range:
o -40°C to +450°C (-40°F to +842°F), depending on body and seat materials
Industries:
o Oil & Gas
o Petrochemical Processing
o Power Generation (Steam, Thermal, Nuclear)
o Water Treatment and Distribution
o Chemical Processing
o HVAC Systems
o Industrial Manufacturing
o Pump Systems
Specific Applications:
o Backflow prevention in high-pressure systems (TG074 National Standard High-Pressure Swing Check Valve)
o Vertical flow pipelines where gravity-assisted closing is required (TG075, TG076 National Standard Vertical Check Valve)
o Large-diameter pipelines in water, oil, or gas distribution systems (TG066, TG067 American Standard Large Diameter Check Valve)
o Compact, threaded installations in small-scale systems (TG077 Threaded Vertical Check Valve)
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