20 Years of Trust: HQ Seals Powering Kaiquan Pump Group – China's Largest Pump Maker

A B2B OEM Case Study on Long-Term Mechanical Seal Supply for Pump Manufacturing

Executive Summary

For over two decades, Jiangsu HQ Seals Fluid Technology Co., Ltd. (HQSeal) has served as a trusted mechanical seal supplier to Shanghai Kaiquan Pump (Group) Co., Ltd. — widely recognized as China's largest comprehensive pump manufacturer. This enduring partnership, spanning more than 20 years, stands as a compelling testament to HQ Seals's OEM-grade manufacturing capability, engineering depth, and unwavering commitment to quality.

This case study is written specifically for overseas pump manufacturers, equipment OEMs, and engineering contractors who are seeking a reliable, technically competent mechanical seal partner capable of supporting high-volume serial production — not merely a trading company or a spot-repair vendor. Through the Kaiquan partnership, HQ Seals demonstrates exactly the kind of long-term, design-in collaboration that modern pump OEMs require.

About Kaiquan Pump Group

Founded in 1995 and headquartered in Shanghai, Kaiquan Pump Group has grown into China's premier pump manufacturer, consistently ranking at the top of the Chinese pump industry by revenue. The group operates five major industrial parks across Shanghai, Zhejiang, Hebei, Liaoning, and Anhui, with total assets exceeding RMB 3.8 billion and a workforce of thousands.

Kaiquan's product portfolio spans centrifugal pumps, submersible pumps, sewage pumps, fire-fighting pumps, variable-frequency water supply units, and pump control systems. Its solutions serve seven core sectors: nuclear and thermal power, petrochemicals, steel and metallurgy, mining, construction, municipal water, and water conservancy. Landmark projects include metro lines, large-scale water conservancy infrastructure, and major industrial energy-saving retrofits across China.

In an industry where a single seal failure can halt an entire production line, Kaiquan's choice of mechanical seal supplier is not made lightly — and it is not changed lightly.

A 20-Year Partnership Built on Engineering Trust

HQ Seals's relationship with Kaiquan began in the early 2000s. What started as a targeted supply agreement for specific pump models has, over more than two decades, evolved into a comprehensive OEM collaboration covering multiple seal types, custom engineering, and joint product development.

The scope of supply includes, but is not limited to:

• Component Mechanical Seals — single and multi-spring component seals for standard centrifugal pump lines;
• Cartridge Seals — pre-assembled cartridge seals for Kaiquan's high-efficiency and chemical process pump series, enabling fast installation and reduced assembly errors on the OEM production line;
• Submersible Pump Seals — specialized mechanical seals for submersible and sewage pump applications, designed to handle abrasive and fibrous media;
• Non-Standard / Custom Seals — custom-engineered sealing solutions for non-standard pump configurations, including large-diameter and high-parameter units;
• Auxiliary Systems — seal supply systems and flushing plans integrated with Kaiquan's engineered pump packages for demanding industrial applications.

Over 20 years, HQ Seals has delivered hundreds of thousands of sealing units to Kaiquan's production facilities — seals that now operate in pumping systems deployed across China's power plants, petrochemical complexes, municipal water networks, and metro systems.

Why Kaiquan Chose — and Stayed with — HQ Seals

A two-decade OEM partnership is not sustained by price alone. The reasons Kaiquan has continued to rely on HQ Seals reflect the core capabilities that matter to any serious pump manufacturer:

3.1 OEM-Grade Manufacturing Capability

HQ Seals operates a 20,000 m² modern manufacturing facility in Zhangjiagang, Jiangsu Province, equipped with advanced CNC machining centers, automated grinding machines, and dedicated seal assembly lines. The factory's production capacity and quality-control systems are structured to meet the serial-production demands of pump OEMs — not just one-off replacements. This is a critical distinction: HQ Seals is built to supply seals by the thousands, with consistent quality across batches.

3.2 In-House R&D and Engineering

HQ Seals maintains a 20-person R&D team and a high-parameter laboratory capable of testing seals under simulated real-world conditions — high pressure, high temperature, corrosive media, and abrasive slurries. This in-house engineering capability allows HQ Seals to collaborate with Kaiquan's engineers on seal selection, face-material pairing, and flush-plan design at the product-development stage, rather than simply fulfilling parts orders after the pump is designed.

The company holds nearly 100 patents and has participated in drafting dozens of national and industry standards for mechanical seals — including serving as the primary drafter of the national standard for submersible pump mechanical seals. This standard-setting role underscores a depth of technical authority that few Chinese seal manufacturers can match.

3.3 Uncompromising Quality Systems

HQ Seals's quality infrastructure includes:

• GJB 9001C (military-grade) and ISO 9001 certified quality management systems;
• A full inspection center with spectrometry, coordinate measuring (CMM), metallographic microscopy, and micro-Vickers hardness testing — ensuring raw material integrity and process control;
• Integrated PDM, MES, and ERP systems linking design data, shop-floor execution, and business management;
• Certified as a Tier-1 supplier for Sinopec (China Petrochemical Corporation), demonstrating compliance with the most stringent procurement standards in China's process industries.

3.4 Responsiveness and Long-Term Support

Pump OEMs need suppliers who can respond quickly to design changes, ramp up volume for new product launches, and provide technical support for field issues. HQ Seals's six branch offices across China, dedicated after-sales team, and direct engineering communication channel have made it a responsive partner — not just a vendor — throughout 20 years of collaboration.

What This Means for Overseas Pump Manufacturers

If you are an overseas pump manufacturer, equipment OEM, or EPC contractor evaluating potential mechanical seal suppliers in China, the Kaiquan case study answers a fundamental question:

"Can this supplier support OEM-level integration — design collaboration, serial production, consistent quality, and long-term partnership — rather than just selling replacement parts?"

HQ Seals's 20-year relationship with China's largest pump manufacturer proves that the answer is yes.

Specifically, overseas OEMs can expect:

• Design-In Collaboration: HQ Seals can review pump operating parameters and recommend or custom-design the optimal seal configuration — cartridge, component, or specialized — for your specific pump model.
• Serial Production Readiness: Production capacity, batch consistency, and quality systems designed for OEM serial supply, not retail distribution. Whether your annual requirement is 1,000 or 100,000 units, the manufacturing infrastructure is in place.
• Comprehensive Product Range: API 682-compliant cartridge seals, component seals for chemical process pumps, slurry pump seals, agitator seals, dry gas seals, and more — covering virtually every pump type in your portfolio.
• Export Experience: HQ Seals already exports to over 10 countries and serves international clients including KLK Oleo (Malaysia's largest oleochemical group). The company is experienced in cross-border communication, documentation, and logistics.
• Partnership Stability: A 30-year-old company with a proven OEM track record is a partner you can build a long-term supply strategy around — not a supplier you need to replace every two years.

Technical Highlights of the Kaiquan Supply Program

Beyond Kaiquan: A Broader OEM Track Record

While the Kaiquan partnership is HQ Seals's flagship OEM case, it is far from the only one. HQ Seals's mechanical seals are deployed across diverse industries and geographies:

• Sinopec Supply Chain: As a Tier-1 supplier, HQ Seals provides sealing solutions for refining, petrochemical, and oilfield applications.
• KLK Oleo (Malaysia): Seal supply for Malaysia's largest oleochemical group, serving palm oil, fatty acid, and glycerin applications.
• Diverse Industrial Applications: Sealing solutions for crude oil pumps, chemical reactors, LNG applications at -20°C, and marine stern shaft seals.
• Global Footprint: Products used in petroleum, chemical, power, pharmaceutical, metallurgy, shipbuilding, paper, and wastewater treatment sectors across 10+ countries.

Partner with a Proven OEM Seal Manufacturer

HQ Seals's 20-year partnership with Kaiquan Pump Group — China's largest pump manufacturer — is more than a reference. It is proof that HQ Seals operates at the level required by the world's most demanding pump OEMs: engineering collaboration, serial production capacity, uncompromising quality, and decades-long reliability.

If your organization is seeking a mechanical seal partner who can move beyond transactional supply into true OEM integration, we invite you to start a technical conversation.