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Help CenterShanghai Kaiquan KQSN300-N9/418 Replacement Wear Ring for KQSN Pump
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As a specialized manufacturer based in Suzhou, Jiangsu, Jiangsu Manqi Machinery Co., Ltd. is proud to offer a high-quality Shanghai Kaiquan KQSN300-N9/418 Replacement Wear Ring for the KQSN pump series. Our wear rings are engineered to restore pump efficiency and reduce internal leakage, ensuring your equipment operates at peak performance. With years of experience in precision machining and a factory spanning 10,000–30,000 square meters, we deliver components that meet or exceed OEM specifications.
The KQSN300-N9/418 wear ring is designed as a direct replacement for the original part, providing a perfect fit for the suction side of the pump. Its primary function is to minimize the clearance between the impeller and casing, thereby reducing recirculation losses and improving volumetric efficiency. Key features include:
- High-strength alloy steel construction – resists abrasion, corrosion, and deformation even under harsh operating conditions.
- Precision CNC machining – ensures tight tolerances (within ±0.05 mm) for optimal sealing and minimal vibration.
- Optional surface treatments – such as hard chrome plating or ceramic coating to extend service life in abrasive or corrosive fluids.
- Compatibility – specifically tailored for the KQSN300-N9/418 pump model, but also available for other KQSN sizes upon request.
- Easy installation – designed as a drop-in replacement without need for additional modifications.
Below is a reference table of typical technical specifications for our KQSN300-N9/418 wear ring. Actual dimensions may vary slightly based on material and coating selection; we recommend confirming with our sales team before ordering.
| Parameter | Typical Value |
| Outer Diameter | 300 mm (customizable) |
| Inner Diameter | N9/418 variant – contact for details |
| Material Hardness | HRC 40–50 (base alloy) |
| Surface Roughness | Ra ≤ 1.6 µm |
| Operating Temperature | -20°C to +180°C (depends on material) |
By choosing our replacement wear ring, customers benefit from:
- Reduced energy consumption – minimized slip losses translate to lower power requirements for the pump.
- Extended pump life – the wear ring protects critical components like the impeller and casing from direct wear, delaying major overhauls.
- Cost savings – a fraction of the cost compared to purchasing a new pump assembly, while delivering comparable performance.
- Fast turnaround – standard orders shipped within 7–15 working days from our Suzhou factory.
Since our establishment in 2017, Jiangsu Manqi Machinery has served customers across Eastern Europe, Southeast Asia, Africa, and South Asia. With a dedicated team of 11–50 employees and a modern 10,000–30,000 m² facility, we maintain rigorous quality control at every stage – from raw material inspection to final dimensional checks. Our annual export volume may be under US$1 million, but this reflects our focused approach on high-quality, niche components rather than mass production. We believe in building long-term partnerships through consistency and reliability.
Contact us today for a quote or technical consultation. We are happy to provide drawings, material certifications, and sample support to ensure the perfect fit for your KQSN pump.
Frequently Asked Questions (FAQ)
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Q: Will this wear ring fit my KQSN300 pump without modification?
A: Yes, the KQSN300-N9/418 wear ring is designed as a direct replacement for the original part. However, we recommend verifying the pump model and serial number to ensure complete compatibility. -
Q: What materials are available for the wear ring?
A: We offer high-strength alloy steel as standard, with options for stainless steel (304/316), duplex, and nickel-based alloys. Surface treatments like hard chrome or tungsten carbide coating are also available at request. -
Q: How long does the wear ring typically last?
A: Service life depends on operating conditions such as fluid abrasiveness, temperature, and pressure. In clean water applications, it often exceeds 2 years; in harsh slurries, periodic inspection is advised. -
Q: Do you provide a quality guarantee?
A: Yes, we stand behind our products with a 12‑month warranty against manufacturing defects. We also offer material test reports (MTR) upon request. -
Q: Can I order a single piece for testing?
A: Absolutely. We accept small trial orders. For first-time customers, we recommend ordering one sample to validate fit and performance before bulk purchasing. -
Q: What is the packaging like for export?
A: Each wear ring is individually wrapped with anti-rust paper and placed in a sturdy wooden case or carton, suitable for sea or air freight. We can also customize packaging according to your requirements. -
Q: What is the typical lead time?
A: For standard material and quantity (1–10 pieces), lead time is 7–15 working days. Larger orders or special materials may require 20–30 days. We will confirm upon order placement. -
Q: How do I install the wear ring? Do you provide instructions?
A: Installation is straightforward – clean the pump housing, press the ring into place (may require gentle heating for tight fit). We can provide a simple installation guide or video if needed.
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