Used Fluid Metering FMI QV Lab Pump with R405 Stainless Steel Head (1/8" Shaft)

Variable-Speed Valveless Piston Pump for OEM Integration & Process Metering

Achieve exceptional fluid control in tight mechanical spaces without overextending your equipment budget. The pre-owned Fluid Metering (FMI) QV Variable-Speed Valveless Piston Pump, paired with the rugged R405 Stainless Steel Pump Head, is a precision fluid metering solution designed for reliable positive displacement flow.

Featuring a compact 1/8-inch shaft configuration, this specific build is engineered for easy integration into tight OEM spaces, compact panel-mount systems, and analytical instruments while retaining the full performance of FMI’s Q-series pump drives. By sourcing this fully tested, used FMI metering system through HiTechTrader, research facilities and system integrators can secure highly accurate, pulsation-free metering for aggressive chemicals and high-purity fluids at a fraction of the cost of buying new.

Condition & Unit Details

• Condition: Fully inspected, used variable-speed metering pump in excellent working condition.

• Testing: Powered on, variable-speed drive and stroke adjustment mechanisms fully tested for smooth, bidirectional operation by our technicians.

• Included Components: FMI QV Variable-Speed Drive module (1/8" Shaft) and R405 Stainless Steel Pump Head.

• The HiTechTrader Guarantee: Backed by our standard 30-day limited warranty. We have been a trusted provider of high-quality used laboratory and scientific equipment since 1982.

CeramPump Valveless Technology for Accurate Fluid Metering

Traditional metering pumps rely on check valves that are prone to clogging, sticking, or failing under continuous operation. Built on FMI’s proprietary CeramPump® technology, this system uses a single rotating ceramic piston moving inside a matched precision cylinder to displace fluid without check valves or bypass systems.

This elegant, valveless configuration offers highly accurate volumetric control, extremely low pulsation during fluid transfer, and minimal maintenance due to having fewer moving parts. Because only one component moves in the fluid path, the pump maintains highly stable volumetric metering over millions of operating cycles.

Variable Speed Flow Control & High Resolution Metering

The QV variable-speed drive system provides incredibly fine control over flow output by adjusting both the piston stroke length (0–100%) and the rotational speed (90–1800 rpm).

When paired with the 1/4-inch piston in the R405 stainless steel pump head, this dual-control system provides an exceptional dispense resolution of approximately 0.016 to 0.32 mL per revolution. While capable of extremely precise low-flow dosing, the QV drive platform can also deliver robust transfer flows up to approximately 2.3 L/min (2300 mL/min) at full stroke and maximum rated speed. Because the pump is reversible, it can deliver fluid in either direction while maintaining accurate volumetric control.

R405 Stainless Steel Head for Extreme Chemical Compatibility

The R405 stainless steel pump head belongs to the modular FMI R-series metering family. The wetted materials—including the 316 stainless steel pump head, precision ceramic piston/cylinder liner, and fluorocarbon (PTFE) seals—provide broad compatibility with aggressive chemicals and solvents.

Unlike standard polymer pump heads, this stainless steel configuration supports stable metering performance at elevated temperatures up to 177 °C (350 °F) and system pressures up to 100 psig (6.9 bar). The modular design also allows operators to quickly swap pump heads to optimize performance for different fluids or flow ranges.

Technical Specifications

Nationwide Shipping & Availability

Waiting on long OEM lead times for highly specific pump configurations can stall your automated process control projects. Operating out of our primary facility in Coatesville, Pennsylvania, HiTechTrader provides rapid, secure shipping to research institutions, pharmaceutical labs, and industrial OEM builders nationwide.

Whether your facility is located locally on the East Coast, in major tech and biotech hubs like California, or anywhere across the globe, we ensure your used fluid processing equipment arrives safely and ready for immediate deployment.

Frequently Asked Questions (FAQ)

Why use a 1/8" shaft on an FMI QV pump?

While many standard laboratory pumps use larger 1/4" or 5/16" shaft diameters, the 1/8" shaft extension is specifically engineered as a compact mechanical option. It allows for straightforward, space-saving integration into tight OEM spaces, automated analytical instruments, and customized panel-mount systems without sacrificing the heavy-duty performance of the QV motor.

What fluids and temperatures can the FMI R405 pump head handle?

The R405 pump head features a 316 stainless steel casing, a ceramic piston/cylinder, and PTFE seals. This robust construction provides broad chemical compatibility and allows the pump to safely handle aggressive industrial solvents and high-purity fluids at elevated temperatures up to 177 °C (350 °F) and pressures up to 100 psig.

How does the FMI CeramPump design eliminate check valves?

The CeramPump design utilizes a single, rotating and reciprocating ceramic piston with a cutout duct. As the piston rotates, this duct alternately aligns with the inlet and outlet ports, mechanically opening and closing the fluid path. This entirely eliminates the need for spring-loaded check valves, providing drift-free, highly accurate positive displacement metering.

Buy the Used FMI QV Lab Pump with R405 Head (1/8" Shaft)

HiTechTrader offers the pre-owned Fluid Metering Inc. QV Variable-Speed Valveless Metering Pump with R405 Stainless Steel Pump Head and 1/8" Shaft, providing laboratories and OEM system integrators with a reliable solution for precision fluid dosing and automated process control.

Contact HiTechTrader today to:

• Request pricing

• Confirm exact port connections, drive speeds, and tubing compatibility

• Discuss expedited shipping options to minimize your lab's downtime