What quality certifications and inspection documents can LEPU SEAL provide?

LEPU SEAL provides professional after-sales support and offers a 1year limited warranty for all supplied mechanical seals.This limited warranty covers only manufacturing defects of our products. It does not cover failures caused by improper installation, off-spec operating conditions, incompatible process media, abrasion, corrosion or manmade damage.

Within the warranty period, if problems occur during operation, our technical team will communicate with you to understand actual working conditions, analyze possible root causes and provide technical support.

Mechanical seal service life is heavily affected by installation quality, equipment status, operating parameters and chemical compatibility with sealed media. Our engineers are available for technical consultation, application analysis and installation guidance to help troubleshoot issues.

If a failure is confirmed to be attributable to LEPU SEAL’s manufacturing defect, we will propose appropriate remedies such as repair or product replacement through mutual discussion.

For overseas customers, we offer continuous remote technical support including installation guidance for pump mechanical seals, cartridge seals and custom sealing solutions.

Yes. LEPU SEAL  performs comprehensive inspection and testing before every mechanical seal shipment to ensure that products meet customer requirements and operating expectations.

Before delivery, each mechanical seal undergoes standard quality checks, including dimensional inspection, seal face inspection, appearance inspection, and assembly verification. For customized products, cartridge seals, and dry gas seals used in more demanding applications, LEPU SEAL  can provide additional testing and technical verification according to project requirements.

Our quality control process covers the complete manufacturing cycle, from incoming material inspection to production monitoring and final shipment inspection. Inspection records and related documents can also be provided according to customer needs.

For overseas customers, LEPU SEAL  can provide photos, videos, and technical feedback before shipment, allowing customers to confirm product status before delivery.

LEPU SEAL  maintains strict quality control throughout the entire manufacturing process to ensure the precision, reliability, and sealing performance of every mechanical seal. Since mechanical seals require high accuracy for stable operation, we control key processes including precision machining, seal face grinding, lapping, polishing, component inspection, and final assembly.

Our factory is equipped with advanced production and inspection equipment, including CNC machining centers, grinding equipment, optical flat crystal testers, and dedicated testing facilities for mechanical seal performance evaluation. Critical dimensions such as seal face flatness, surface finish, and assembly tolerances are inspected according to customer drawings and technical requirements.

In addition, LEPU SEAL  has an experienced engineering and QC team with extensive knowledge of sealing applications in industries such as water treatment, chemical processing, food and beverage, energy, and industrial pumps. Every batch is inspected before shipment to ensure consistent product quality.

LEPU SEAL  offers various material combinations for mechanical seal faces, elastomers, and metal components to meet different operating conditions. Common seal face materials include carbon graphite, silicon carbide (SSiC/RBSiC), tungsten carbide, and ceramic, while available elastomer materials include EPDM, FKM (Viton), NBR, FFKM, and PTFE.

The material selection depends on factors such as the sealing medium, temperature, pressure, corrosion level, abrasion resistance, and equipment operating conditions. For example, silicon carbide and tungsten carbide are commonly selected for applications requiring high wear resistance, while different elastomer options are chosen according to chemical compatibility.

For metal components, LEPU SEAL  commonly uses materials such as SS304 and SS316, with other alloy materials available according to customer requirements.

With experience in customized mechanical seal manufacturing since 1998, LEPU SEAL  can help customers select suitable material combinations for pump mechanical seals, cartridge seals, dry gas seals, and other sealing solutions.

LEPU SEAL  provides a wide range of mechanical seal solutions to meet different pump, compressor, and industrial equipment requirements. Our main products include pump mechanical seals, cartridge mechanical seals, dry gas seals, mixer and agitator seals, OEM replacement seals, and mechanical seal spare parts.

For pump applications, LEPU SEAL  offers both component seals and cartridge seal designs, suitable for different equipment structures and operating conditions. We also provide replacement solutions for various industrial pumps, including applications in wastewater treatment, chemical processing, food and beverage, oil and gas, power generation, and marine industries.

Beyond standard products, LEPU SEAL  supports customized sealing products based on customer drawings, samples, and technical requirements. Our capabilities cover small pump seals as well as larger sealing solutions for demanding industrial applications.

Whether you need a standard mechanical seal, replacement seal, or customized sealing component, send your requirements to LEPU SEAL  and our team will provide a suitable solution.

Yes. LEPU SEAL  specializes in providing interchangeable replacement mechanical seals for various international pump brands and sealing systems. Based on corresponding dimensions, structures, and operating requirements, we manufacture replacement solutions for commonly used models, including Burgmann equivalent seals, John Crane replacement seals, Flygt pump seals, and Grundfos mechanical seals.

Our replacement seals are designed to provide reliable sealing performance while offering advantages in cost efficiency, flexible customization, and shorter supply cycles compared with many traditional sourcing channels. Customers can provide the original seal model, drawing, photos, or application information, and LEPU SEAL  will evaluate the compatibility and recommend a suitable replacement.

In addition to replacement mechanical seals, our product range also includes cartridge mechanical seals, dry gas seals, elastomer bellow seals, seal spare parts, and customized OEM sealing components.

Contact LEPU SEAL  with your existing seal model or pump information, and we can help you find a suitable replacement solution.