SiC Lined Internal Gear Pump for Abrasive, Viscous and Corrosive Fluids

Applications for SiC Lined External Gear Pumps

External gear pumps are chosen when the flow has to be steady and predictable. The applications below share that need and add aggressive chemistry or viscosity. Each one starts with a review, not an assumption.

• Chemical Transfer and Acid Handling

  Transfer lines carrying acids, mixed acids or solvent-bearing streams are reviewed for concentration, temperature and seal compatibility first. The pump structure follows: which wet-end parts are SiC, how the inlet is protected and whether the duty is continuous transfer or controlled metering.

• Battery Materials and Electrolyte Processing

  Electrolyte additives, precursor solutions and fluoride-bearing fluids put a premium on wetted-part stability and contamination control. Start from the media chemistry, filtration level and dosing consistency you need; the review confirms whether a SiC-lined structure and which seal pairing suit the fluid.

• Polymer, Resin and High-Viscosity Fluid Metering

  Gear chambers give viscous fluids a controlled displacement, which is why external gear pumps are common in polymer and resin metering. When the same fluid is chemically active or abrasive, SiC contact surfaces carry the wear duty. Viscosity range, torque demand and temperature are confirmed before the gear geometry is fixed.

• Waste-Acid Recovery and Regeneration Systems

  Recovery loops often combine variable pH, suspended solids, crystallizing salts and temperature swings. Material pairing, gear clearance, inlet protection and pressure relief are reviewed together. A SiC-lined pump is considered when corrosion and wear occur at the same time, with a flush and drain plan agreed up front.

• What Every Application Needs First

  Whatever the application, three conditions are checked before a configuration is offered: the inlet must supply the pump without starving it, the fluid must reach the pump within its filtration limits, and the discharge must have pressure relief. These are installation conditions, not ceramic properties, and they are reviewed from your system drawing.

Usage Guidelines for SiC-Lined Internal Gear Pumps

Proper installation, commissioning and maintenance protect SiC contact parts and help maintain stable flow. Operate within the conditions reviewed for your pump configuration.

• Installation Requirements

  1. Shaft alignment and pipe support: Align the shaft with the drive and support piping independently. Misalignment and pipe loads can stress bearings and seals or cause internal contact.
  2. Priming before startup: Prime the pump fully before starting. Dry running can damage SiC seal faces, bushings and wear surfaces.
  3. Inlet conditions: Keep the inlet line clean, correctly sized and unobstructed. Poor suction can cause cavitation, unstable flow, noise and increased wear.

• Commissioning Steps

  1. First start: Start at the reduced speed or load agreed for the configuration. Confirm flow direction, inlet and outlet pressures, and seal condition before continuous operation.
  2. Temperature and noise: Watch for overheating, vibration, unusual noise or leakage. Investigate alignment, priming, viscosity and internal resistance if problems appear.
  3. Fluid compatibility: Confirm temperature, viscosity, particle content and chemistry match the reviewed duty. Reassess suitability before changing the process fluid.

• Operating Practices

  1. Filtration: Inspect and clean filters or strainers regularly to keep particle exposure within the reviewed conditions.
  2. Pressure stability: Stay within the approved pressure range and avoid sudden changes that can overload gears, housing and seals.
  3. Performance tracking: Record flow and pressure trends. Falling flow or unstable pressure may indicate viscosity changes, inlet restrictions, seal wear or altered internal clearances.

• Maintenance & Storage

  1. Inspection intervals: Base checks on fluid type, particles, temperature, pressure and duty cycle. Abrasive or corrosive fluids require closer monitoring.
  2. Seals and wear components: Inspect seal faces, bushings and wear plates when leakage, noise, vibration or unstable flow appears. Base replacement on actual condition as well as operating history.
  3. Long-term storage: Clean and dry the pump, remove corrosive residue, and protect it from moisture and dust before storage.

SiC Lined Gear Pump FAQ

1. What fluids can a SiC lined gear pump handle?
   A SiC lined gear pump can be reviewed for acids, alkalis, solvents, electrolyte blends, polymer additives, hydraulic and lubricating oils, resins, heavy oils and other corrosive, abrasive or viscous process fluids. Suitability is confirmed per duty from fluid chemistry and concentration, viscosity at operating temperature, solids or crystallization, seal material and the required flow and pressure.
2. Why use silicon carbide instead of stainless steel or alloy wetted parts?
   Silicon carbide resists chemical attack and abrasive contact at the wetted surfaces, so wear plates, bushings and chamber contact areas keep their geometry while metal parts would corrode or score. Its low thermal expansion also helps clearances stay stable as temperature changes. Compatibility is confirmed for each fluid, concentration and temperature, not assumed from the material name.
3. How do I choose between an external and an internal gear pump?
   External gear pumps are usually selected for compact controlled metering and stable displacement at low to moderate viscosity. Internal gear pumps are considered when suction behavior, higher viscosity, flow range or pressure call for a different rotor arrangement. The choice follows your fluid, duty point and installation—there is no generic rule that fits every line.
4. Can a SiC lined gear pump handle high-viscosity fluids?
   Gear pumps are commonly used for viscous transfer and metering, and a SiC lined version is reviewed the same way. Send the minimum, normal and maximum viscosity at operating temperature, the flow rate, motor load, gear clearance, back pressure, suction condition and pipe layout; the review confirms whether the pump holds stable transfer without excessive load.
5. What should I send if the fluid contains abrasive particles or can crystallize?
   Provide particle size, solids concentration and crystallization behavior, plus the filtration, flushing and cleaning conditions. SiC contact parts resist scoring on wear plates, bushings and seal faces, but particle size, filtration level and operating pressure still decide how much abrasive duty reaches the pump. Inlet protection, flush procedure and maintenance access are reviewed before the pump structure is confirmed.
6. What do you need for a quotation, and can you match our existing pump?
   Send the required flow rate, working pressure, fluid type and concentration, viscosity and temperature ranges, particle condition, sealing requirement, port and mounting interface, and duty cycle. For a replacement project, add drawings, photographs, nameplate data or the existing pump model. ADCERAX reviews SiC contact parts, seal pairing, port and mounting arrangement and drive connection against your media and installation.