Magnetic drive pump chemical process project case

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DMAC & AA & CC High Corrosion Resistance Pump System Upgrade Project

2022-06-15 00:00:00

Rayitek introduced 25 magnetic drive centrifugal pumps, 12 self-priming magnetic pumps, and 3 air-operated diaphragm pumps to the 3-1# and 3-2# production lines. These pumps handle high-risk, highly corrosive fluids such as DMF, AA, DMAC, and ethylene glycol. The project adheres to zero-leakage, high corrosion resistance, and smart operation standards to support process upgrades.

Project brief

Industry	Chemical (polymer material synthesis and solvent delivery)
Media	DMF (toxic/corrosive), AA (strong acid), DMAC (volatile), ethylene glycol solution (high-temperature circulation)
Flow rate	Magnetic pumps: 0.6-27 m³/h; diaphragm pumps: 0-1 m³/h (adjustable range)
Head	Magnetic pumps: 15-50 m; diaphragm pumps: 0-50 m (adjustable)
NPSHr	≤2m

Special working conditions and customer pain points

Special working conditions:

High media safety requirements: transport of DMF, DMAC and other toxic, flammable and explosive solvents, need to strictly prevent leakage.
Strong corrosive environment: the medium contains strong corrosive components (such as acids), need to be corrosion-resistant materials.
Diversified needs: part of the process requires self-priming function (suction range of 4m), need to deal with trace particles of liquid (diaphragm pumps).
Harsh operating environment: equipment for more than 2 years continuous operation, noise ≤ 80dB (1 meter).

Customer pain points:

Traditional mechanical seal pumps are prone to leakage, safety hazards and environmental issues.
Corrosive media lead to short pump body life, high maintenance costs.
Need to adapt to frequent start/stop, small flow rate precision control.
Glycol solution circulation pumps require high flow (27 m³/h) and high reliability.

Core Solutions

Full range of leak-free designs:

Magnetic drive centrifugal pump: adopts polymagnetic coupling (samarium-cobalt magnet) and C-276 Hastelloy insulating sleeve to completely eliminate shaft seal leakage.
Air operated diaphragm pump: Teflon diaphragm insulation, suitable for particulate media (e.g. liquid seal tank discharge).

Material Customization:

The overflow parts are made of 304/316L stainless steel, and the slide bearing is made of YWN8 tungsten carbide alloy (corrosion and wear resistant).
Seal material: PTFE, perfluoroether, graphite/lead are prohibited (anti-media contamination).

Low maintenance design:

Bearing life ≥ 8000 hours, axial force self-balancing technology to reduce wear.
Pump chamber polishing treatment (surface roughness Ra ≤ 3.2), flow channel pickling passivation, reduce the risk of clogging.

Performance guarantee:

head deviation ≤ ± 5%, motor power reserve margin (such as the following 15kW motor power redundancy ≥ 25%).
Frequency converter motor is equipped with an independent explosion-proof cooling fan to adapt to the needs of frequency control.

Adaptable to complex working conditions:

Self-priming magnetic pump (BMZ series) realizes 4m suction range and supports intermittent operation.
Air-operated diaphragm pump (QBK-15) is resistant to idling and adjustable flow/pressure (air consumption 0.3 m³/min).