Superior fluid control systems for a broad range of metering and dispensing applications, designed and Manufactured by Car-May.

The revolutionary Travcyl™ pump design provides exceptional accuracy and control for a variety of dispensing and low-flow metering uses. These fluid systems are employed by pharmaceutical, medical, and biotech industries for process control, manufacturing and automation. Car-May systems for liquid filling, dispensing, fluid processing and fluid metering are widely used in the inks/dyes, chemical processing, and food industries.

Car-May's proprietary technologies enable customization and integration of fluid control systems for the most effective fluid control solution available.

Precision Liquid Control

Car-May provides liquid control systems for precision dispensing and metering.

In contrast to basic metering pumps, Car-May's systems provide pumping capability, fluid measurement, and flow control all in one compact module. These valve-less, digitally-controlled systems integrate easily into manufacturing processes, lab environments, OEM applications, and custom projects.

Precision fluid metering requires more than a metering pump. To ensure that your fluid metering system is operating correctly, flow control and flow measurement capabilities are necessary.

Traditional Metering Pumps

Metering pumps as a rule require a flow meter, regulator, or other apparatus to maintain precsion and control over the flow rate. The pump and associated equipment require calibration, and a method for controlling the system must be established. Valves to prevent inaccuracy due to fluid drift within the pump, and reservoirs or dampeners for pulsation reduction are often required as well.

Car-May's System

Car-May systems have control capabilities and flow measurement built into the design of the instrument. Equipment calibration is not required as the flow rate is not dependent on the stroke length of the piston, as is the case for many traditional metering pumps. Car-May systems control flow rate by the speed (rpm) of the motor. An internally-sealed, valve less fluid path within the pump head provides absolute fluid control. When the motor stops, fluid flow stops. Drift within the pump cannot occur because the inlet and outlet are never connected.

Car-May's fluid control systems are designed for exceptional precision. The Car-May design delivers exceptional accuracy and reproducibility for demanding applications.

Digitally-controlled, valve-less fluid motion ensures maximum repeatability of fluid delivery, and increases your process control. This increase in control can contribute significantly toward optimizing your process and reaching your Six-Sigma quality improvement goals.

Chemically-resistant materials such as Teflon, PEEK, perfluoroelastomer, and ceramic are used for the wetted parts of the pump, creating a versatile, durable fluid control system.

Car-May OEM System Modules

Car-May System Modules are complete fluid delivery systems for metering and dispensing. These compact modules precisely move, control, and measure fluid.

NovaSync™

NovaSync™ Dual 2-1

The NovaSync™ Dual channel pump is the latest addition to the Encynova pump line made by Car-May LLC. The exceptionally accurate NovaSync™ is housed in a durable chemically resistant enclosure with a power supply, touch screen controller and backlit display. The simple user interfaces guides you through Metering & Dispensing menus for accurate liquid delivery every time. The pump can be used as two separate channels with rates of 0-60 ml/min each. Or in the NovaSync™ mode at 0-120 ml/min. In either mode pressures as high as 250psi can be achieved.

2-Series

Model 2-1
	Low-cost metering up to 50 ml/min. Single-cylinder design; pulsation depends on control method.	Dimensions in inches.
Model 2-4
	Dispensing and low-pulsation metering up to 200 ml/min. Model 2-4 Nova System	Dimensions in inches.

Includes NovaFlow™ for near-pulseless metering, and NovaSpense™ for dispensing accuracy up to 0.1% Cv.

16-Series

16-series systems are recommended for applications with higher-viscosity fluids.

Model 16-2 Dispensing and metering up to 640 ml/min. Model 16-4 Dispensing and low-pulsation metering up to 1280 ml/min. Model 16-4 Nova System Includes NovaFlow™ for near-pulseless metering, and NovaSpense™ for dispensing accuracy up to 0.1% Cv.

Dimensions in inches.

Nova System Communications

To harness precision, you must have control.

That's why our Nova Systems have a flexible communications platform. RS-485 communication capability allows you to easily control the Nova Systems with our predefined commands. Use a PC, PLC, or any other source that can generate 8-bit ASCII commands to precisely control as many Nova Systems as you need.

LabVIEW™, C++ and Visual Basic compatibility provide the versatility required for simple and effective integration into your process. Connect the Nova System, assign it to an address on your network, and you are ready to go. Up to 250 Modules can be controlled on one RS-485 network using ASCII serial strings. Digital I/O and analog capability are standard in Nova Systems and in Basic Systems that use the integrated motor/drive.

Four Model 2-1 System Modules panel-mounted in a standard 19-inch rack.

Technology

Car-May's hybrid piston-syringe pumps master a wide variety of liquid delivery tasks. Discrete-volume DISPENSING and continuous- flow METERING functions are performed easily and precisely with the same pump.

When Accuracy and Durability Combine...

The Car-May design is an internally-sealed, valve-less pump technology which integrates the durability of a piston pump with the accuracy of a syringe pump. Now you can move, measure, and control liquid with one compact module. Versatile control options enable quick, effective integration into your system. Excellent repeatability and millions of cycles of piston life provide robust and reliable performance for OEM applications.

A single, offset crank drives precision pistons inside one, two, or four liquid cylinders. As the pistons move fluid in and out of the cylinders, the cylinders slide from side to side, from inlet port to outlet port. The internally-sealed flow path eliminates the need for external valves. User calibration is not necessary. Operating as a continuous-drive, multiple-syringe device, the Car-May System automatically refills and empties each cylinder in succession.

The traveling cylinder (Travcyl™) design is internally-sealed by sliding ceramic porting plates. No external valves are needed. Each piston/cylinder assembly is mounted on a ceramic plate which slides from the inlet port where the cylinder fills to the outlet port where it delivers. Each piston is at a different point in the fill/deliver cycle at any given time. One connecting rod drives two pistons simultaneously. While one cylinder is filling, the opposing cylinder is delivering. In 4-cylinder models (shown here), flow pulsation is reduced compared to single-piston pumps because at least one cylinder is always dispensing (As shown in figure 2 below).

Car-May's standard multiple-channel manifold is used to interconnect all of the inlets and all of the outlets — so each pump has just one main inlet and one main outlet.

Internally Sealed

Ceramic porting plates internally seal the Car-May System. Valves are not required because when the motor stops, liquid flow stops. There is never an open flow path between the inlet and outlet, eliminating potential inlet/outlet liquid contamination while increasing accuracy. There is no drift within the system and air cannot enter the flow path; there is no dripping and prime is retained.

Digitally-controlled

Car-May's high-end pumps (Nova Systems) are equipped with servo motors which accept 8-bit ASCII commands. Digital control of liquid delivery ensures the exceptional repeatability and precision required for automated processes and development applications. Nova Systems control the metering flow rate with the speed (rpm) of the motor, and they measure delivery volume through crankshaft rotation.

User calibration is not required because flow rate and dispense volume are not adjusted by physical re-orientation of parts (as is the case with many other pump technologies).

(Scale exaggerated to enhance detail.)

Native Pump Output (Basic System Modules) Figure 2 illustrates the volumetric fluid output of a Basic four-cylinder Car-May System. The total output (orange line on top) is the sum of the outputs from the four individual cylinders over time during constant pump rotation. As shown by the peaks in the total output plot, native operation produces some flow pulsation—up to 20% of total flow. Car-May's software algorithm NovaFlow™ reduces pulsation by up to 97%.
Nova Technology (Nova System Modules) Nova Technology provides enhanced performance for precision liquid control. Nova technology is standard in all Nova Systems, which are comprised of any 4-cylinder pump head with a servo motor. Two software algorithms, NovaSpense™ and NovaFlow™, are used by the Nova System's servo motor to more precisely control liquid delivery. NovaSpense™ dramatically increases accuracy for dispensing, and NovaFlow™ provides nearly pulseless delivery during continuous-flow metering. Nova capabilities are available with the servo motor option for four-piston OEM System Modules (2-4 and 16-4) and are standard features in the Base Station and Satellite units.
NovaFlow™ The metering accuracy of Basic Systems is exceptional. However, when low-pulsation is also required, NovaFlow™ is the software algorithm that reduces instantaneous pulsation to as little as 3% of total flow during metering. NovaFlow™ can be utilized for flow rates between 200 nl/min and 20 ml/min with a Model 2-4 Nova System, or 1.6 ul/min and 200 ml/min with a 16-4 Nova System. Shown at right: 1.15 ml/min flow rate, Native/Basic pulsation vs. NovaFlow™ pulsation.
NovaSpense™ NovaSpense™ is the software algorithm that controls the Car-May System for exceptionally accurate dispensing. Test results for NovaSpense™ dispensing are shown here. The programmed dispense volume represented is 1.000 mL. The repeatability and accuracy that NovaSpense™ provides are ideal for automated manufacturing and precision laboratory applications.
NovaSync™ Dual 2-1 The NovaSync™ dual channel pump is the newest addition to the Encynova pump line made by Car-May LLC. The exceptionally accurate NovaSync™ is housed if a durable chemically resistant enclosure with a power supply, touch screen controller and backlit display. The simple user interfaces guides you through Metering and Dispensing menus for accurate liquid delivery every time.

The pump can be used as two separate channels with rates of 0-60 ml/min each. Or in the NovaSync™ mode at 0-120 ml/min. In either mode pressures as high as 250 psi can be achieved.