A silicon carbide lined external gear pump is a positive-displacement pump designed for controlled transfer or metering of corrosive, abrasive or viscous process fluids. The SiC-lined wet end helps reduce corrosion and wear on fluid-contact surfaces, while the external gear structure supports stable displacement in chemical, polymer, electrolyte and acid-recovery systems.
Choose Your Purchase Scope
This page covers external gear pumps and their wet-end components. If you need an internal gear design, compare the internal gear pump page; if you need a complete dosing or filtration system, start with the system supplier, not the pump page.
Complete pump project
Specify transfer or metering duty, wet-end materials, sealing, drive and installation requirements as one coordinated package.
Wet-end or replacement-part project
Identify the lining or component to be supplied, its drawing and mating interfaces. For repairs, add the existing pump identity and photographs of the affected part.
Customization Around Your Application
- Wet end: lining, gear interfaces, shafts, bearing contact surfaces and seal-material pairing.
- Displacement and fit: gear width, clearances, rotation direction and drawing tolerances.
- Installation: port position, flange pattern, mounting base, coupling and motor interface.
- Procurement: drawings or samples, quantity, inspection points and project delivery requirements.
SiC-Lined External Gear Pump Specifications
| Silicon Carbide Lined External Gear Pump | |
| Model no. | Size |
| AT-LMH-01 | Customized |
SiC Wet-End Material Properties (RBSiC / SSiC)
These values support material selection for fluid-contact and wear components. They are material properties, not pump performance ratings.
| Property | Unit / condition | AD-SIC-RB (reaction-bonded) | AD-SIC-SS (sintered) |
|---|---|---|---|
| SiC content | wt% | 85 nominal | ≥99 |
| Residual free silicon | phase basis | 15 wt% nominal | No silicon-infiltration phase |
| Bulk density | g/cm³, selection value | ≥3.02 | 3.10 typical |
| Apparent open porosity | vol% | ≤0.1 | <0.1 |
| Flexural strength | MPa, typical | 250 at 20 °C | 380 (test temperature not stated) |
| Compressive strength | MPa, typical | Not listed | ≥2600 |
| Young's modulus | GPa, typical | 330 at 20 °C | 420 |
| Poisson's ratio | — | Not listed | 0.16 |
| Thermal conductivity | W/(m·K), ambient | Not listed | 100–120 |
| Application-temperature ceiling | °C, material selection | 1380 | 1600 |
How to Select a SiC-Lined External Gear Pump
1. Confirm the Pump Type
- Check suitability for your transfer or metering duty.
- Compare pump layouts against viscosity, inlet conditions, flow range and available space.
2. Define the Operating Conditions
- Pair each required flow with fluid composition, viscosity, temperature and pressure.
- Provide startup, normal and extreme viscosity values with temperatures and units. State inlet and differential pressure separately.
- Identify particle size, solids concentration and any crystallization or solidification risks.
3. Confirm Materials, Connections & Testing
- Select RBSiC or SSiC for each component, with compatible seals and secondary materials.
- Define ports, flanges, shaft, coupling and mounting interfaces on the drawing.
- Agree inspection points and any pump testing before quotation.
Material Comparison: SiC, Stainless Steel & Polymer Lining
RBSiC — Reaction-Bonded Silicon Carbide
- Typical use: Large or complex linings and housings, balancing cost, shape and chemical resistance.
- Selection notes: Contains residual free silicon. Check compatibility with strongly alkaline media.
SSiC — Sintered Silicon Carbide
- Typical use: Gears, shafts, bearing surfaces and seal faces requiring wear resistance, purity and fine finishes.
- Selection notes: Contains no free silicon. Large or thin sections can increase manufacturing difficulty, cost and lead time.
Stainless Steel & Alloy Parts
- Typical use: Moderate-temperature, non-abrasive service where machining and repairability matter.
- Selection notes: Check the specific alloy against corrosive fluids and particles. Corrosion, wear and metal contamination may limit service life.
Polymer-Lined Parts
- Typical use: Compatible chemical duties at moderate temperatures, particularly where cost matters.
- Selection notes: Check abrasion, swelling, creep and temperature limits. Pressure cycling may affect dimensional stability and gear clearances.
Final selection: Confirm each component against fluid chemistry, concentration, temperature, particle load and mating materials. Record the agreed materials in the project specification.
Packaging Process for the Silicon Carbide Lined External Gear Pump
Component protection, port sealing, crating and shipping requirements are agreed for each order. Ceramic parts are packed to avoid point loading and impact during transit; packaging details are confirmed with the quotation.
