Microliter Pumps — M Series
M-Series pumps meter under 100 mL/min and dispense 2.5 µL to 100 µL per revolution for ultra-low-volume work.
Electronic Variable Metering Pumps
eVmP Electronic Valveless Metering Pumps
Electronic, valveless positive-displacement pumps for repeatable fluid metering and dispensing.
Zaxis electronic variable metering pumps use a patented valveless design with digitally controlled system-wide volumetric adjustment. The pumps meter liquids, chemicals and other substances for automation production lines.
The rotating and reciprocating ceramic piston has no external supply or discharge valves. Electronic control changes volume without a necessary manual adjustment between recipes or batches.
Choose among microliter, milliliter, high-capacity, benchtop, dual-enclosure and engineering configurations to fit the pump head, drive, flow and integration needs.
Request for QuoteChoose an eVmP configuration
Match the pump head, drive, enclosure and stated range to the application.
M-Series2.5–100 µL per revolution; under 100 mL/min.
V-Series25 µL–1.28 mL per revolution; up to 1,920 mL/min.
VS10-Series10 mL per revolution; up to 6 L/min at 600 RPM.
eVmP1 BenchtopEnclosure with 7-inch touchscreen.
eVmP2 DualTwo pumps in one enclosure.
Engineering PumpsConfigurable eVmP automation platform.How the valveless design works
A precision ceramic core and linear stepper actuator set eVmP displacement; fine changes in angle position adjust metered liquid volume.
Its intake port remains connected to the discharge port in the valveless ceramic-piston arrangement. The design uses one moving part and is designed for millions of maintenance-free cycles.
- ✓No external supply or discharge valves
- ✓Electronic volume adjustment
- ✓Ceramic pump components
- ✓Detachable Touch Screen Interface
- ✓Ethernet IP, Ethernet TCP/IP, RS485 or 24VDC I/O
Electronic adjustment changes the angle position to change the liquid volume metered. The detachable Touch Screen Interface supports programming, immediate teach and control.
eVmP configuration details
Milliliter Pumps — V Series
V-Series pumps meter up to 1920 mL/min and dispense down to 25 µL with rugged, high-precision repeatability.
Milliliter Pumps — VS10 Series
VS10 pumps use 316 stainless steel and PTFE wetted parts with sanitary features for FDA and 3A standards.
Benchtop Enclosure — eVmP1
The eVmP1 provides a splashproof stainless-steel enclosure, an integrated 7” capacitive touchscreen and automatic adjustment from µL to ML.
Dual Enclosures — eVmP2
The eVmP2 places two configurable pumps in one enclosure and offers a robust alternative to tubing and diaphragm pump inaccuracy.
Engineering Metering Pumps
Engineering configurations pair a high-performance metering and fluid dispenser with a detachable touchscreen for programming, immediate teach and control.
Metering Pump Compliance and Applications
eVmP configurations support OEM and packaging applications, pharmaceutical manufacturers, environmental component lines and medical assembly lines. Zaxis builds electronic valveless metering pumps in the USA and supports FDA, REACH and RoHS requirements.
Configuration detail
- ✓Ethernet IP, Ethernet TCP/IP, RS485 or 24VDC I/O
Application review
eVmP configurations are used where a process needs repeatable metering of fluids such as reagents, gels, lubricants and chemical solutions. The appropriate configuration depends on the intended dispense amount, fluid resistance and machine controls. Reviewing those variables together keeps pump selection focused on the actual production task.
In depth: eVmP fluid metering
Electronic adjustment for changing processes
Electronic variable metering pump technology adjusts dispense volume and flow rate through controls rather than a manual mechanical change. That capability supports processes that must accommodate different products or fluid requirements.
A valveless positive-displacement pump links delivered volume to internal motion. The configuration still needs to be selected around the fluid, required volume and operating conditions.
Servo motor technology can provide controlled movement and torque for the pump mechanism.
Precision dispensing and fluid behavior
Precise dispensing transfers a controlled volume into a container, product or assembly. Positive displacement is useful because it physically moves a known amount during each pumping cycle.
Fluid viscosity and abrasiveness affect how a system performs. Gels and oils can create more resistance, while abrasive materials can influence component wear.
The intended application should establish the range, wetted materials and controls before installation.
Water hammer and cavitation
Water hammer is a pressure surge associated with changing the movement of fluid in a system. Cavitation occurs when vapor bubbles form and collapse in the pump.
Both conditions can affect equipment life, so inlet conditions and system pressure matter during configuration.
Assess piping, flow changes and the characteristics of the pumped fluid as part of the application review.
Selecting a metering pump for the application
Pump selection starts with the fluid, target volume, viscosity and pressure conditions instead of a single technology label. Positive-displacement and dynamic pump types respond differently as those conditions change.
A positive-displacement design physically displaces a measured volume. That can make it useful when a process needs a controlled, repeatable transfer rather than a flow that changes with pressure.
Valveless designs avoid external valves in the pumping path, while the complete wetted material set must be compatible with the application. Abrasive fluids can affect seals and tolerances, and viscous fluids may require attention to flow resistance.
Controls, maintenance expectations and integration requirements should be reviewed with the pump range. The final configuration is established by the operating conditions of the production process.
Some applications need only a small dose, whereas others need a milliliter-scale fill or a stronger drive for a resistant material. M-, V- and VS10-Series configurations offer separate ranges for reviewing those needs. Use the product specifications and a process trial to determine the appropriate configuration.
Bench-top and integrated enclosure options can position a metering pump in a laboratory or automation environment. Communication choices such as Ethernet IP, Ethernet TCP/IP, RS485 and 24VDC I/O should be aligned with the control architecture that operates the equipment.
Compare the eVmP range
| Specification | M-Series | V-Series | VS10-Series | eVmP1 Benchtop | eVmP2 Dual |
|---|---|---|---|---|---|
| Volume per revolution / stroke | 2.5–100 µL | 25 µL–1.28 mL | Nearly 10 mL | Up to 1.28 mL | Up to 1.28 mL |
| Maximum flow | Under 100 mL/min | Up to 1,920 mL/min | Up to 6 L/min (10 mL/rev @ 600 RPM) | Up to 900 mL/min | Up to 1,920 mL/min |
| Maximum pressure | 100 PSIG | 100/200 PSIG | 100 PSIG | 0–100 psi | 100/200 PSIG |
| Accuracy / repeatability | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV | ±1% FS / 0.5% CV |
Keep exploring
eVmP pump FAQ
What is an eVmP?
An eVmP is Zaxis’s electronic variable metering pump, a valveless positive-displacement pump for fluid metering and dispensing.
How does it adjust volume?
An electronically controlled actuator makes fine angle-position adjustments that change the volume of metered liquid.
Why is a valveless pump useful?
The eVmP has no external supply or discharge valves and uses a rotating, reciprocating ceramic piston.
Which eVmP handles microliter volumes?
The M-Series states a 2.5–100 µL volume per revolution.
Which eVmP has the highest stated flow?
The VS10-Series dispenses 10 mL per revolution, up to 6 L/min at 600 RPM.
What interfaces are available?
Communications can use Ethernet IP, 24VDC digital I/O, RS485 or Ethernet TCP/IP. Digital I/O and network control: Ethernet IP, Ethernet TCP/IP, RS485 or 24VDC I/O.
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