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Tungsten Carbide Eyeglass Plate (Wear Plate) & Cutting Ring Set for Concrete Pump Trucks

The Eyeglass Plate (or Wear Plate) is a critical component in the S-valve system of concrete pump trucks and trailer pumps. Made from high-hardness materials (e.g., tungsten carbide), it features two symmetrical round holes resembling eyeglasses, hence the name.

Key Functions:
✔ Sealing: Works with the cutting ring to prevent concrete leakage during pumping.
✔ Wear Resistance: Withstands high-pressure abrasion from sand/gravel in concrete.
✔ Flow Guidance: Ensures smooth concrete flow during S-valve switching.

Applications: Concrete pump trucks, boom pumps, trailer pumps, etc.

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Product info

1. Structure & Naming

Shape: Features two symmetrical round holes resembling eyeglasses, hence the name "Eyeglass Plate."

Material: Typically made of ultra-hard, wear-resistant alloys (e.g., tungsten carbide) to withstand abrasive concrete mixtures.

2. Core Functions

Sealing: Works dynamically with the cutting ring to prevent backflow or leakage.

Flow Guidance: Directs concrete flow during S-valve switching.

Wear Resistance: Endures high-frequency erosion from sand/gravel, extending equipment lifespan.

3. Applications

Primarily used in S-valve systems of concrete pump trucks (e.g., SANY, Zoomlion).

Also found in trailer pumps and truck-mounted pumps.

4. Common Issues & Maintenance

Wear Failure: Prolonged use may cause sealing failure due to hole-edge wear; requires periodic replacement.

Maintenance Tips: Replace alongside cutting rings; ensure precise installation; apply lubrication to reduce friction.

5. Related Components

Cutting Ring: Partners with the eyeglass plate to create a dynamic seal.

S-Valve (Gate Valve): The plate mounts directly on its outlet, aiding flow direction control.

Key Advantages

Advantage	Details
1. Extreme Wear Resistance	High-purity tungsten carbide (WC) alloy with hardness >HRA90, 3-5x lifespan vs. steel plates.
2. Precision Sealing	Laser-calibrated holes (±0.02mm) ensure perfect sealing with cutting rings under 35MPa pressure.
3. Impact-Resistant	Multi-layer design: wear-resistant surface + crack-proof base, ideal for gravel-heavy concrete.
4. Broad Compatibility	Compatible with SANY, Zoomlion, Putzmeister, and other major pump brands.