We engineer and supply high-performance fluoroplastic-lined pumps for aggressive chemical and industrial applications. Built with F46-lined wetted parts over rigid metal casings, these pumps deliver reliable transfer of strong acids, alkalis, and solvents, including vertical pipeline installations where floor space is limited.
| Model Series | Material Configuration | Flow Rate (m³/h) | Head (m) | Operating Temp (°C) | Design Pressure |
|---|---|---|---|---|---|
| GF (GDF) Series | Cast Iron Housing + F46 (FEP) Lining | 6.3 - 120 | 18 - 80 | -20 to 150 | 1.6 MPa |
Note: The specifications above are based on standard 2900 r/min (2-pole) motor configurations. For specific performance curves, fluid gravity adjustments, and exact dimensional data, please consult our engineering department.
Pump selection starts with your fluid chemistry and installation constraints. Whether you need to circulate hot sulfuric acid through vertical pipelines or fit a pump into a crowded modular skid, our engineering team maps your flow and head requirements directly against our database. Below are typical applications where our fluoroplastic lined pumps operate efficiently.
Ideal for skid-mounted chemical dosing systems and cramped plant areas where a traditional horizontal baseplate pump cannot fit due to footprint constraints.
Continuous circulation of highly concentrated acids and alkalis in reaction loops, utilizing the lined centrifugal pump's straight-through flow architecture.
Transferring aggressive plating solutions, cleaning acids, and rinse water in vertical pipe runs for anodizing and surface treatment lines.
Dosing corrosive coagulants, chlorination reagents, and acidic effluents directly within the pipeline network of industrial wastewater treatment plants.
Reliable transfer of volatile solvents and corrosive intermediates, balancing high flow requirements with a compact vertical pipeline design.
With over 20 years dedicated to fluoroplastic and stainless steel pump manufacturing, our fully integrated sintering, lining, and machining facility ensures total quality control over every fluoroplastic lined pump we produce.
YFTEL manufactures corrosion-resistant pumps, valves and piping at a 26,000 m² production base in Anhui, with international trade operations headquartered in Hangzhou. The factory runs 200 sets of production equipment, employs 200+ staff including 30+ fluid engineers, and ships over 32,000 pump and valve units per year across 10 series and 300+ models. Production is ISO9001 certified, products carry CE marking, and exports currently reach customers in 30+ countries.
About Us ENGINEERING CASES SolutionsIt combines two properties in one pump: the wetted surfaces are lined with F46 fluoroplastic for corrosion resistance, while the outer metal casing carries the mechanical loads and pipeline pressure. The GF/GDF series adds a vertical same-centerline layout that mounts directly into the pipeline like a valve, eliminating large baseplates and foundation blocks.
Yes. The GF/GDF series features a heavy-duty F46 (FEP) fluoroplastic lining. This material provides outstanding chemical resistance to almost all industrial acids, including concentrated sulfuric, hydrochloric, and nitric acid.
No. The GF/GDF vertical lined pump features a top-pull-out design. You can easily remove the motor, bracket, and impeller assembly for inspection or seal replacement without disconnecting the main suction and discharge pipelines.
The standard F46-lined pump is rated for continuous operation up to 100°C, with special constructions available for service up to 150°C. For higher temperatures, please confirm your exact fluid parameters so we can select the appropriate configuration.
To accurately size a lined centrifugal pump, please provide the medium name, concentration, flow rate (m³/h), required head (m), operating temperature, specific gravity, and any space constraints in your piping layout.
In industrial fluid transfer, corrosion dictates equipment selection more often than any other factor. Standard metallic pumps degrade quickly on strong acids and alkalis, and exotic alloy pumps carry procurement costs that most duties cannot justify. The fluoroplastic lined pump solves this with a composite structure: a metal casing that carries the mechanical loads, and a thick fluoroplastic lining that faces the chemistry. This guide covers the mechanical design, structural advantages, and material considerations of employing fluoroplastic lined centrifugal pumps, such as the GF/GDF vertical series, in aggressive chemical environments.
A fluoroplastic lined pump is a centrifugal pump whose entire wetted path is lined with a chemically resistant fluoroplastic, typically F46 (FEP), over a cast-iron or steel armor. The lining takes the corrosion; the metal takes the pressure and the piping loads. In the GF/GDF series, this composite construction is implemented in a vertical pipeline configuration: the suction and discharge nozzles lie on the exact same centerline and share the same nominal pipe diameter, so the pump installs directly within a straight vertical pipe run. A vertical hollow shaft motor drives the impeller directly, with no separate coupling alignment required, reducing installation time and mitigating vibration issues caused by mechanical misalignment.
The primary driver for specifying a vertical lined centrifugal pump is space optimization. In crowded chemical plants, modular skid systems, or OEM equipment packages, floor space is at a premium. Because the pump is supported by the piping itself (or a very small supporting pedestal), it requires a fraction of the footprint of a horizontal pump mounted on a heavy cast-iron baseplate.
The vertical same-centerline geometry also simplifies piping design. Plant engineers do not need to route complex elbows, U-bends, and eccentric reducers to feed a horizontal suction nozzle. The straight-through flow path minimizes friction losses in the adjacent piping and provides a clean, highly organized plant layout.
Handling corrosive media such as concentrated sulfuric acid, hydrochloric acid, or strong alkalis requires wetted parts that will not degrade. While metallic centrifugal pumps in stainless steel or duplex alloys are suitable for mild chemicals and utility water duties, severe corrosive applications require non-metallic wetted surfaces.
The GF/GDF series utilizes a heavy cast-iron outer casing lined with F46 (Fluorinated Ethylene Propylene, FEP) fluoroplastic. This composite structure is critical: the cast-iron armor bears the mechanical stresses and weight of the vertical piping, while the F46 lining ensures the aggressive chemical never touches the metal. F46 offers near-universal chemical inertness across acids and alkalis, with standard constructions rated for continuous service up to 100°C and special constructions extending the range to 150°C.
A common misconception is that pipeline-mounted pumps are difficult to maintain because they are integrated into the primary pipeline. Modern vertical lined pumps employ a top-pull-out design geometry. When the mechanical seal or impeller requires inspection or replacement, maintenance technicians simply unbolt the motor bracket from the main pump casing. The entire rotating assembly (motor, shaft, mechanical seal, and impeller) is lifted straight up and out of the volute.
The heavy cast-iron volute remains securely bolted to the suction and discharge pipes. This eliminates the need to drain adjacent large storage tanks, decouple heavy flanges, or realign piping upon reassembly, drastically reducing maintenance downtime and labor costs.
Because the shaft is oriented vertically, the mechanical seal dynamics differ slightly from horizontal pumps. The GF/GDF series is equipped with an advanced outboard bellows mechanical seal (WB2 type). The stationary ring is typically machined from silicon carbide (SiC) or alumina-ceramic for extreme hardness and wear resistance, while the rotating ring utilizes PTFE-filled materials. This combination provides excellent abrasion resistance and a leak-tight seal against corrosive fluids. Proper venting of the seal chamber during startup is essential to ensure the seal faces are fully lubricated by the pumped medium, preventing dry-running and premature thermal cracking.
Specifying a vertical lined pump requires the same rigorous hydraulic analysis as any centrifugal pump:
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