API 685 Magnetic Drive Pumps
For refinery and petrochemical duty
Kweng API 685 magnetic drive pumps are engineered for the safe handling of hazardous hydrocarbons, aggressive chemicals and valuable process fluids. Built for demanding refinery, petrochemical and heavy chemical applications, these sealless pumps deliver leak-free performance, improved safety and dependable long-term operation.
Built for leak-free handling of hydrocarbons, aggressive chemicals, and valuable fluids.
Sealless Leak-Free Design
Eliminates conventional mechanical seals for safer hazardous fluid handling.
API 685 Service Suitability
Designed for critical petroleum, petrochemical & gas industry applications.
Heavy Duty Construction
Engineered for demanding industrial duties with strong mechanical reliability.
Low Maintenance Operation
Reduces seal related failures, maintenance frequency and downtime risk.
Sealless Pumps for Hazardous Hydrocarbon and Chemical Service
Kweng API 685 Magnetic Drive Pumps are developed for applications where process safety, leak prevention and operational reliability are essential. These pumps are ideal for handling hazardous hydrocarbons, toxic chemicals, solvents, hot liquids and other critical process media in refinery, petrochemical and chemical processing environments. For buyers across India and international markets, the API 685 range offers a dependable sealless pumping solution for demanding continuous duty service.
Built for Critical API 685 Process Applications
API 685 covers sealless centrifugal pumps used in petroleum, petrochemical and gas industry service. Kweng API 685 magnetic drive pumps are designed for these demanding environments, combining leak-free magnetic drive technology with robust process pump engineering. The range is suitable for applications where containment, reliability and reduced maintenance are major operating priorities.
Key Features and Advantages
Leak-Free Sealless Operation
Magnetic drive technology eliminates conventional mechanical seals, helping reduce leakage risk in hazardous process applications.
Enhanced Plant Safety
Suitable for handling aggressive, toxic and high-value fluids where safe containment is a critical operating requirement.
Lower Maintenance Demand
With fewer seal related maintenance issues, the pump supports improved uptime and lower service intervention.
Reliable Performance in Demanding Duties
Engineered for refinery, petrochemical and chemical process environments requiring long term dependable operation.
Material Flexibility
Available with application-suitable material options including Duplex Stainless Steel, Alloy 20 and Alloy C276.
Application Focused Options
Optional arrangements such as steam jackets, secondary containment, flush systems and cyclone separator options are available for process specific needs.
Applications in Refineries and Petrochemical Plants
Kweng API 685 magnetic drive pumps are suitable for a wide range of hazardous and critical fluid handling applications in refinery, petrochemical and heavy process industries.
- Xylene transfer
- Toluene transfer
- Sour water service
- Solvent processing
- Hydrocarbon transfer
- Sulfuric acid handling
- Valuable process fluid transfer
- Hazardous chemical circulation
- Toxic and aggressive fluid service
- Hot and crystallizing liquid handling
Industries We Served
The API 685 range is designed for industries where safe, leak-free fluid handling is essential to plant reliability, environmental protection and operator safety.
Refineries
Petrochemical Plants
Specialty Chemical Units
Chemical Manufacturing Plants
Oil and Gas Processing Facilities
Process Industries Handling Hazardous Fluids
Key Technical Data of Product
Sealless Magnetic Drive Pumps - API 685
- Kweng Sealless Magnetic Drive Pumps – API 685 are specifically designed for the safe handling and processing of hazardous and valuable hydrocarbons and chemicals for refineries and chemical plants worldwide.
- The Kweng Sealless Magnetic Drive Pumps – API 685 is a heavy-duty, center line mounted process pump complying with API 685 (API 610) applications for sealless pumps.
- A range of synchronous magnet drives is offered with the pump range, which are rated to match prime mover performance.
Kweng Sealless Magnetic Drive Pumps – API 685 fall into the following category:
- API : The API Series Sealless Magnetic Drive Pumps are designed to cater to the oil, gas, petroleum and heavy chemical industries, conforming to the API 685 Standard for sealless magnetic drive pumps and relevant API 610 requirements.
Material of Construction:
- Standard: The A-8 and S-5 models come with spiral-wound gaskets and silicon carbide internal bearings.
- Other material options are available on request.
- Duplex Stainless Steel, Alloy 20 and Alloy C276
- Various flange options are available as standard.
Applications:
The Kweng Sealless Magnetic Drive Pumps – API 685 range is used in toxic, aggressive, hot, crystallizing and high value processes for hydrocarbon processing, sour water, sulfuric acid, xylene, toluene, etc.
Kweng API 685 Magnetic Drive Pumps are available in performance configurations suitable for demanding industrial service. The following specifications provide a general overview of the range.
| Maximum Flow | up to 405 m3/hr (1784 GPM) |
| Maximum Head | up to 140 M (460 FT) |
| Liquid Temperature | -80 °C to + 350°C (-110°F to +660°F) |
| Maximum Power | up to 200 HP |
System Pressures | up to 185 Bar.g (2700 psig) |
Speeds | up to 3600 rpm |
Impeller | Closed |
Bearings | SSiC, ‘ENDRY’ SSiC opt. for Upset or Dry-run Condition |
Connections | 150lb RF std. to 1500lb RF ANSI Flanges |
Magnets | Samarium Cobalt |
Motor | NEMA or IEC Frame Mounted |
Mounting | Close Coupled OR Open Coupled |
Steam Jackets | Optional |
External Flush | Optional |
Recirculated Flush & Vent | Optional |
Secondary Containment | Optional |
Cyclone Seperator | Optional for Improved Solids Handling |
Performance Curves for Kweng Sealless Magnetic Drive Pumps - API 685
Performance curves are provided to help engineers and project teams evaluate operating range, flow, head, and duty suitability for specific applications.
Sectional View for Kweng Sealless Magnetic Drive Pumps - API 685
General Arrangement Drawings for Kweng Sealless Magnetic Drive Pumps - API 685
General arrangement drawings support engineering review, layout planning & technical evaluation during project selection. These assets are especially useful for EPC contractors, consultants, maintenance teams & procurement engineers requiring dimensional & installation reference.
Why Choose Kweng for API 685 Magnetic Drive Pumps
Kweng combines sealless pump manufacturing experience with application focused engineering support for hazardous and demanding process duties. Our API 685 magnetic drive pumps are developed for customers who require leak-free operation, reliable performance and strong long-term value in refinery, petrochemical and chemical processing environments. We support both domestic and international buyers with technical guidance, product selection support and after sales service.
Serving India and International Industrial Markets
Kweng supplies API 685 magnetic drive pumps for industrial projects across India and global markets. Our solutions are suitable for refinery, petrochemical, chemical and process industry requirements in major industrial regions including Gujarat, Maharashtra, Tamil Nadu, Andhra Pradesh, Telangana, Karnataka and other high demand processing hubs, as well as export-oriented international applications.
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Need an API 685 Magnetic Drive Pump for Your Application?
Speak with Kweng for application guidance, technical support, performance review and a project specific quotation for refinery, petrochemical and hazardous chemical service.
Frequently Asked Questions
What is an API 685 magnetic drive pump?
An API 685 magnetic drive pump is a sealless centrifugal pump designed for petroleum, petrochemical, gas and hazardous process services where leak prevention, safety and reliability are critical.
Where are API 685 magnetic drive pumps used?
They are commonly used in refineries, petrochemical plants, oil and gas facilities and chemical processing units for hydrocarbon transfer, sour water, acids, solvents and other hazardous fluids.
What are the advantages of a sealless magnetic drive pump over a sealed pump?
A sealless magnetic drive pump eliminates conventional mechanical seals, helping reduce leakage risk, maintenance requirements and environmental exposure in critical applications.
What fluids can Kweng API 685 pumps handle?
The range is suitable for hazardous hydrocarbons, aggressive chemicals, sour water, sulfuric acid, xylene, toluene, solvents and other toxic or high value process fluids, subject to material selection and application review.
What material options are available for Kweng API 685 pumps?
Standard models include A-8 and S-5 configurations with spiral-wound gaskets and silicon carbide internal bearings. Additional options include Duplex Stainless Steel, Alloy 20 and Alloy C276.
What is the performance range of Kweng API 685 magnetic drive pumps?
The current range offers capacity up to 405 m³/hr, head up to 140 m, temperature range from -80°C to +350°C and pressure up to 185 bar.g.
Are custom options available for specific process requirements?
Yes. Depending on the duty, optional arrangements can include steam jackets, external flush, recirculated flush and vent, secondary containment and cyclone separators.
Does Kweng supply API 685 magnetic drive pumps across India and export markets?
Yes. Kweng serves domestic and international industrial buyers and supports project requirements for Indian and global markets.
Request a Quote
Share your duty parameters, fluid details, flow, head, temperature and operating conditions. Our team will review your requirement and recommend the most suitable API 685 magnetic drive pump configuration.