Swing Check Valve

PART NAME	MATERIAL
Eye Screw	CS
Bonnet	ASTM A216 WCB
Nut	ASTM A194 2H
Stud	ASTM A193 B7
Gasket	FLEXIBLE GRAPHITE/316
Screw	CS
Yoke	ASTM A216 WCB
Hinge Pin	CS
Hinge	ASTM A216 WCB
Disc Washer	CS
Retaining Nut	ASTM A194 2H
Cotter Pin	SS
Disc	ASTM A216 WCB+13Cr
Seat	ASTM A105+13Cr
Body	ASTM A216 WCB

• STD PORT
• Temp.&pressure Acc TO ASME B16.34
• Marking ACC to MSS SP-25;
• UNI-DIRECTIONAL DESIGN

This swing check valve (branded TRLAN) is engineered for reliable performance in high-pressure process systems, featuring a 14-inch size and Class 150 pressure rating. Constructed from WCB (a widely used carbon steel for industrial valves), it combines a robust bolted bonnet design (for secure, leak-resistant sealing) with a smooth polished internal surface (to ensure efficient fluid flow and wear resistance). Finished with a corrosion-resistant gray coating, the valve meets global standards (CE, ISO, Ex, etc.), making it suitable for a range of industrial applications-including oil and gas, chemical processing, and water treatment. Its clear, stamped specifications (size, pressure class, material) simplify on-site identification, installation, and maintenance, delivering durability and practicality for critical pipeline operations.

Bolted Bonnet Connection Detail

 

As a professional check valve supplier, the close-up shows the valve's bolted bonnet assembly: heavy-duty hexagonal nuts and bolts are evenly arranged to tightly seal the bonnet to the body, ensuring leak resistance in high-pressure scenarios. The gray surface coating provides corrosion protection, suitable for industrial environments.

Bonnet Top Markings of check valve manufacturers

 

A top-down view of the bonnet reveals evenly spaced fasteners. Stamped "14-150, WCB" on the surface, these markings clearly indicate the valve's size, pressure class, and material for quick parameter identification during installation or maintenance.

Flange End & Internal Structure

 

This detail displays the flanged check valve's flanged end (with bolt holes for pipeline mounting) and its smooth, polished interior. The finish ensures unobstructed fluid flow while enhancing wear resistance for handling various industrial media.

Body Specification Marking

 

Stamped on the non return valve price body: "14" size, Class 150 pressure rating, WCB material". The curved, robust body design is engineered for high-pressure operating conditions, making it a common valve type in process industries.

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• Certificate of Authority to use the official API monogram | API-6D | API Spec Q1®
• Verification of conformity | ICR/VC/HM241090
• EAC
• SIL Functional Safety Certificate | EN60079 | GB/T3836 | ISO17292 | API6D | API608 | API609 | API600 | API603 | API602 | DIN3352 | DIN3356 | DIN3357 | DIN3354 | EN10434 | EN1984 | EN13709 | EN593 | EN3356 | GB/T 12234 | GB/T 12235 | GB/T 12236 | GB/T 12237 | GB/T 12238 | BS1873 | BS1868 | BS5351
• EU Representative Contract
• II2 G EX DIIC T1
• Utility model patent certificate