SEALLESS MAGNETIC DRIVE PUMPS - ANSI
Introduction
Kweng Magnetic Drive Pumps – ANSI are engineered to ANSI B73.3 dimensional standard for safe, leak free handling of corrosive, hazardous and high purity chemicals. Our sealless design eliminates mechanical seals and associated emission points, reducing maintenance, fugitive emissions and total cost of ownership ideal for chemical, petrochemical, pharma and speciality process plants.
- Leak free, sealless construction: No dynamic shaft seals to zero seal failures and minimal VOC emissions.
- ANSI B73.3 compliant envelope: Simplifies drop in replacement and interchangeability.
- Chemical duty materials: Options across ETFE/PFA linings, high nickel alloys, ceramic & SiC bearings.
- Rugged, modular build: Serviceable wet end, cartridge assemblies and standardized spare parts.
- Efficient magnetic coupling: High torque transmission with built in slip protection options.
- Lower lifecycle cost: Fewer wear parts, less unplanned downtime, faster MTTR.
Magnetic Drive Pumps - ANSI
Applications in Industrial and Petrochemical
- Acid/alkali transfer and recirculation
- Solvents, hydrocarbons and aromatics
- Chlor alkali, fertiliser and polymer units
- Pharma intermediates & fine chemicals
- Scrubbers, pickling, surface treatment lines
- Tank farm transfer, loading/unloading skids
ANSI B73.3 Compliance & What it Means
ANSI B73.3 defines key dimensional and design criteria for sealless, horizontal, end suction centrifugal pumps. Compliance ensures:
- Dimensional interchangeability with standards ANSI footprints
- Predictable nozzle loads and alignment with piping layouts
- Maintenance familiarity for operators used to ANSI standards
Industries We Serve
Chemical, Petrochemical, Pharma, Dyes & Intermediates, Water & Wastewater (Chemical dosing), Pulp & Paper, Surface Treatment, Textiles and Power & Utilities
Technical Specifications
SEALLESS MAGNETIC DRIVE PUMPS – ANSI
- Kweng Sealless Magnetic Drive Pumps – ANSI are sealless magnetic drive centrifugal pumps designed as per ASME B73.3 standard.
- The design of Kweng Sealless Magnetic Drive Pumps – ANSI provides a wide range of operational benefits, making them a meaningful and valuable alternative to traditional mechanical/gland sealed pumps.
- Kweng Sealless Magnetic Drive Pumps present a ‘ZERO LEAKAGE’ design with total product containment, the design ensures no risk of emissions or leaks, which can harm productivity, employees and the environment.
- With no seals to replace and the use of streamlined components across the entire Kweng Sealless Magnetic Drive Pumps product line, spare parts inventory can be kept at a minimum, helping to optimize your operating budget.
- The overall benefit package this range brings to the user is ease of application, ensuring safe, leak-free operation, low running costs, minimal spare holding and minimal downtime/fast maintenance. This maximizes online process time.
Kweng Sealless Magnetic Drive Pumps fall into two categories:
- GSP: The General Service Magnetic Drive Pumps: The design of the GSP Series magnetic drive pumps caters to clean fluid services without any special requirements. The GSP Series Magnetic Drive Pumps are capable of handling solids up to 100 micron particle size < 3% w/w.
CSP: The Critical Service Magnetic Drive Pumps: The Critical Service Magnetic Drive Pumps – CSP Series Magnetic Drive Pumps are designed to cater to critical fluid services that require special arrangements such as heating/cooling jackets, solids handling, CIP flush, dual containment, “ENDRY” bearings, etc. The CSP Series Magnetic Drive Pumps are designed for handling solids/slurries with up to 100 micron particle size < 27% w/w and up to 6 mm particle size < 7% w/w.
Material of Construction:
- Standard
- Carbon Steel, Stainless Steel, Duplex Stainless Steel, Alloy 20, Alloy C276, Nickel-Based Materials, Titanium, etc.
- Product Lubricated Journal Bearings: Silicon Carbide (SSiC)
- Customized materials (e.g., carbon, TC, etc.) on demand
Applications:
- Kweng Sealless Magnetic Drive Pumps can handle a broad range of process applications such as transfer, circulation, vacuum distillation, high-pressure reactions, slurry, heat recovery skids, boilers (thermic fluid), lyophilizers, liquid terminals, tanker loading & unloading skids, negative suctions, submerged, cryogenic and many more.
The KWENG SEALLESS MAGNETIC DRIVE PUMPS – ANSI Series are designed to conform to ANSI B73.3 dimensional standards. The Kweng Sealless Magnetic Drive Pumps are extremely rugged, which makes them ideal for rigorous duty in the chemical and petrochemical industries.
Maximum Flow | up to 300 m3/hr (1320 GPM) |
Maximum Head | up to 120 M (400 FT) |
Liquid Temperature | -80 °C to + 350°C (-110°F to +660°F) |
Maximum Power | up to 200 HP |
System Pressures | up to 150 Bar.g (2175 psig) |
Speeds | up to 3600 rpm |
Impeller | Closed |
Bearings | SSiC, ‘ENDRY’ SSiC optional for Upset or Dry-run Conditions |
Connections | 150lb RF standard or optional 300lb 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 - ANSI Metallic
Sectional View for Kweng Sealless Magnetic Drive Pumps - ANSI Metallic
Impellers
Standard close impellers, single piece castings. Special non clogging type impellers design for solids handling & freezing media applications.
Casing Wear Rings
Fully replaceable wear rings. Standard carbon & advance PTFE materials.
Casing
Standard ANSI/ISO design models. Single piece castings with drain/vent hubs. Available with jackets for freezing media applications.
Pump Shaft
Modular heavy duty pump shafts with standard wetted MOC's. Also available in Duplex SS, Hastelloy & Titanium.
Bush Bearing Set
Concentrically located hydrodynamic heavy duty bush bearings, designed to tolerate relative thermal expansions. Standard SSiC materials. Special "ENDRY" bearings for dry running capabilities available.
Bush Holder
Assembled to the back plate internally. It is not supported on the containment shell.
Casing Gaskets
Fully confined gaskets. Various Styles, PTFE & metallic gaskets available.
Back Plates
Heavy duty back plates made from solid plates designed to handle the internal rotary assembly.
Driven / Inner Magnet
Fully sheathed driven/ inner magnet rotors with standard wetted MOC's made from solid piece. Standard magnets are samarium cobalt.
Driver / Outer Magnet
Heavy duty rotor made from a solid bar. Standard materials EN8 with samarium cobalt magnets. Magnet rings fully sheathed for longevity.
Intermediate Lantern
Heavy duty single piece cast design with inbuilt lifting hook & modular foot. Designed to accommodate open coupled as well as all types of international motor frames with adapters for closed coupled design.
Containment Shell
Constructed in accordance with ASME VIll international standards. Certified with PED 2014/68/EU.
General Arrangement Drawings for Kweng Sealless Magnetic Drive Pumps - ANSI Metallic
CAPACITY
300 m3/hr.
(1320 GPM)
DELIVERY HEAD
120M
(400 FT)
TEMPRATURE RANGE
-80 to +350°C
(-110 to +660°F)
PRESSURE RATING
150 Bar.g
(2175 psig)
FAQs
What's the difference between ANSI and ISO magnetic drive pumps?
ANSI follows B73.3 dimensions common in North America where ISO follows DIN EN ISO 2858/15783. We supply both ensuring drop in fit for regional standards.
Can these pumps handle solids or slurries?
Select models handle light solids with suitable clearances and materials. For slurries consult KWENG for bearing and impeller options.
Are dry run events a risk?
As with all sealless pumps, dry running can damage bearings. We offer dry run protection and power/temperature monitoring to mitigate risk.
Do you provide explosion proof options?
Yes. ATEX/IECEx motor options and auxiliary monitoring packages are available for classified zones.
Do you support retrofit projects?
Yes. Our ANSI footprint and application engineering support enable smooth retrofits with minimal piping changes.
Get a Quote
Tell us your fluid, concentration, temperature, specific gravity, viscosity, flow, head, NPSHa and site classification. Our engineers will size the right ANSI magnetic drive pump for your duty.
