Precision Ceramic Rotary Plunger Pump for Micro Liquid Metering

Product Overview

This system is a single-head, one-inlet and one-outlet reciprocating rotary positive-displacement ceramic plunger pump designed for high-precision metering of very small liquid volumes. Its controlled rotary plunger motion creates a repeatable switching action between the inlet and outlet ports, enabling accurate liquid intake, transfer, dispensing, filling, injection, spraying, and line marking. Flow accuracy reaches within ±3‰, supporting demanding processes where stable delivery and minimal material loss are essential.

The equipment is suitable for pharmaceutical liquids, electrolytes, acids, solvents, dairy products, adhesives, reagents, and other specialized media. It supports battery research, advanced materials development, chemical processing, laboratory automation, powder and ceramic research, and precision production environments requiring controlled liquid dosing. The compact pump and controller arrangement is easy to integrate into benchtop systems, pilot equipment, and automated workstations.

Reliability is supported by a ceramic contact path, high pairing accuracy, low-friction operation, and a design without dynamic seals, lubricating oil, or conventional wear-prone components. The unit is engineered for corrosive, high-temperature, and otherwise challenging liquids, while password protection, parameter storage, and automatic stopping at the programmed quantity help maintain safe, consistent operation over extended use.

Key Features

• High Precision Positive Displacement: The reciprocating rotary plunger structure adjusts delivered volume through stroke length and rotation cycles, achieving metering accuracy within ±3‰ for demanding micro-liquid applications.

• Advanced Ceramic Pump Core: Pump-core materials include zirconia ZrO₂ and alumina Al₂O₃. These industrial ceramics provide high hardness, low friction, strong wear resistance, corrosion resistance, high-temperature capability, and extended service life.

• Self-Sealing Ceramic Pairing: The plunger and sleeve are manufactured using nanotechnology combined with gel injection molding. Their uniform microstructure, high density, and pairing accuracy of 2 μm support self-sealing and self-lubricating performance without additional sealing parts or lubricating oil.

• Broad Chemical Compatibility: All components in contact with the medium are ceramic, helping prevent chemical reactions between the pump materials and the processed liquid. The pump sleeve and related structures are designed to tolerate acidic, alkaline, and other aggressive media.

• Stable Valve-Free Flow Path: The valve-free design delivers highly stable flow while helping prevent waste, bubbles, leakage, residual dripping, and blockage. This supports cleaner filling, injection, coating, spraying, and marking operations.

• Reversible Variable-Speed Drive: An imported servo motor or stepper motor provides pulse-controlled operation from 1 to 1200 rpm, with forward and reverse rotation. Reverse transfer can be selected when process conditions require rapid liquid recovery or line clearing.

• Programmable Touchscreen Control: A 4.3-inch touchscreen human-machine interface provides convenient parameter entry and operational monitoring. The programmable controller offers stable control and stores parameters permanently, including up to 100 recipes.

• Process Automation Functions: Configurable functions include forward suction, retraction, retraction volume, delayed metering, standby cleaning, and production-capacity counting. The unit automatically stops metering when the programmed liquid quantity has been reached.

• Low-Maintenance Construction: The only moving component is the plunger rod. With no dynamic sealing elements or easily damaged wear parts, the equipment is simple to maintain and suitable for repeated laboratory or production operation.

• Industrial Integration Ready: A standard communication interface allows standalone use or connection with a PLC or industrial computer. The compact design, password protection, and factory-reset function support controlled deployment in shared or automated work environments.

Applications

Technical Specifications

The operating cycle is controlled through coordinated plunger rotation inside the ceramic chamber. First, the rotating plunger creates a cavity that draws the liquid through the inlet. As rotation continues past the inlet port, the inlet closes and the captured liquid is moved toward the outlet. The outlet then opens for discharge and closes as the plunger passes beyond the outlet port. This controlled reciprocating rotary action creates positive displacement without relying on conventional valve components.

Total metered volume can be calculated using the relationship Q total = Q stroke × N stroke. Operators can set the stroke volume and number of strokes according to the required process quantity, then use the controller to repeat the sequence accurately. The wide speed range and forward or reverse operation give process engineers flexibility when optimizing liquid transfer, recovery, cleaning, or dosing cycles.

Material selection should be confirmed according to the liquid medium and operating temperature before purchase. The available ceramic pump-core materials are zirconia and alumina, while the liquid-transfer tubing can be supplied in PE or Teflon. Outlet needle diameter and length can also be selected to match the required dispensing pattern, connection arrangement, and application constraints.

Why Choose This Product

• Premium Wear and Corrosion Resistance: Zirconia and alumina ceramic components are selected for demanding liquid environments involving acids, alkalis, solvents, electrolytes, and elevated temperatures.

• Stable Long-Term Metering: High-precision ceramic pairing, low friction, and positive-displacement operation help maintain repeatable delivery while minimizing wear-related variation.

• Reduced Maintenance Burden: The valve-free architecture and single moving plunger rod eliminate dynamic seals, additional lubricating oil, and many common wear components.

• Configurable and Automation Ready: Recipe storage, touchscreen programming, reversible operation, multiple dosing modes, standard communications, and selectable tubing and needle options support laboratory and industrial integration.

• Controlled Operation and Process Security: Password protection, automatic quantity-based stopping, production counting, and factory-reset capability provide practical safeguards for repeatable process control.

Contact us for a quotation, application review, or customized liquid-metering solution matched to your medium, temperature, flow profile, tubing, needle, and automation requirements.

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