Tungsten Carbide Check Ring with HRA 89-92 Hardness, Wear & Corrosion Resistant and Precision Fit for High-Pressure Systems

Tungsten Carbide Check Ring (also known as anti-backflow ring) is manufactured from high-performance tungsten carbide-cobalt (WC-Co) material. It features extremely high hardness, excellent wear resistance, corrosion resistance, and impact resistance. This product is widely used in high-pressure plunger pumps, hydraulic systems, injection molding machines, oilfield equipment, and other applications requiring unidirectional flow control, effectively preventing medium backflow and ensuring stable system operation.

• Ultra-high hardness: HRA 89-92, significantly better than conventional alloy steels or ceramics.
• Wear & corrosion resistant: Suitable for particle-containing media, acidic/alkaline liquids, and high-temperature & high-pressure environments.
• Precision fit: End faces and sealing surfaces can be mirror-lapped to ensure reliable sealing.
• High fatigue resistance: Long-term use under high-frequency pulsating pressure without cracking or deformation.
• Extended service life: 3-5 times longer than conventional metal check rings.

• Valve assemblies of high-pressure plunger pumps
• Fluid ends of fracturing pumps in oilfields
• Chemical metering pumps
• High-pressure cleaning equipment
• Hydraulic impact tools

Custom designs are available based on customer drawings, including different chamfers, end-face grooves, stepped bores, etc. Non-standard sizes and integrated sealing solutions can also be provided.