Friday, April 24, 2015

Metering pump detects pressure variations without external sensors

The magnetic sensor as
On the way to increasingly high-quality chemical products the exact dosage is becoming increasingly important. For the dosing affects not only on the reproducibility of the quality of products produced from, but can also increase the profit margin by a security surcharges are metered. If the metering pumps used then also monitor nor even, also increases the availability of the production process.

These and other requirements were the focus of development efforts for the new dosing pump gamma / X Prominent - the successor model of the proven series gamma / L. First comes a controlled magnetic drive is used, which has been so designed that it can also monitor the hydraulic conditions.

In conventional dosing pressure sensors are integrated to detect pressure in the liquid. The electronic components and connectors are exposed to the metered, often aggressive chemicals that can be attacked and corroded. The necessary components and additional sealing surfaces also increase, depending on the model, the price of around 15 to 20 percent. The new pumps do not require such sensors. Their magnetic control covers all variations in pressure and protects the system from overpressure. So unnecessary sources of error are excluded.

Trouble-free dosing even with effervescent media
An example of typical problems in the use of metering pumps in practice are effervescent media. Thus, gas bubbles can completely block the dosage of chlorine bleach. This may in waterworks, where the operator is not always on site, result in impairment inserts. This not only causes loss of production, but additional costs.

An automatic venting of the metering pump prevents outgassing media disturb the dosage by gas bubbles and optimize the dosing. In addition, the new solenoid diaphragm detects varying pressure conditions and adjusts their dosing automatically to the currently prevailing conditions - even with highly viscous media. Viscosity changes caused by temperature variations are automatically compensated. The control automatically ensures trouble-free dosing. The new legislation also increases the accuracy of ± 5% to ± 2% or better. As a result, product quality and productivity can be increased.

The magnetic control detects selbst├Ątig hydraulic deviations that interfere with the metering considerably. Overpressure, broken pressure lines or vacuum and gas in the liquid can be registered without sensors and processed. This pressure is indicated on the display. When exceeding or falling below a preset limit values ​​on the display, an alarm is displayed and transmitted via relay or bus interface. The timely detection and switching off the system and pump help to prevent damage. The integrated pressure monitoring is a reliable backup system to the existing pressure gauge and pressure relief valve. The pressure in the display simplifies commissioning, monitoring and troubleshooting, and thus reduces downtimes considerably.

High accuracy and intuitive operating concept
The pump is used for the dosage of 1 ml to 45 l / h at a back pressure of 25 to 2 bar. Your control range is 1: 2,000, reproducible accuracy within ± 2%. Other features of the new pump series also includes the installation and intuitive operating concept. In a fortified with standard tool mounting plate, the new solenoid is simply connected. For installation and positioning almost no restrictions must be observed, the status LED will be readily apparent from every angle. The unique pin assignment prevents incorrect assignments. Simple and front-access controls and clear messages from the large display simplify maintenance.

The pump is equipped with a large, illuminated graphic display with plain text in many languages. Use the Click Wheel newly developed is possible a rapid adjustment of the parameters. The Quick Access is via four buttons without cumbersome long scrolling in various operating levels. The feed rate is adjusted directly in liters per hour. Stroke, frequency and dosing profile can be parameterized. By a pressure gauge gives a short glance at the display information about the existing pressures. The three-stage LED status indicator, which is attached to the upper front panel displays from all sides visible from the current operating status.

The stroke length can be adjusted electronically in the range from 0 to 100 percent. If a pulsation or continuous dosing is required, it allows the controlled magnetic drive, execute the print stroke slowly. In the volume-proportional dosing of a chemical in a main stream continuous dosing characteristic is obtained in the form of an elongated metering stroke. Since both media are already well mixed in this way, is mixing elements can be saved in the main stream.

Static mixer unnecessary
For applications for pH regulation, for example in water levels, may as "chemicals clouds" are avoided. The slow pressure stroke the pH-regulating chemical is added to the water flow evenly. The water then has a nearly constant pH and arrives without pH variation to the consumer. The cost for an additional static mixer and its installation can be saved.

In the case of rigid dosing also can smoothest flow metering characteristic be necessary to prevent pipeline or pump will be damaged by strong pulsations of the incompressible dosing liquid. This requirement is mastered by the new pump.

Conclusion: The new solenoid diaphragm gamma / X-wear, overload and energy saving. As a first metering pump in its class, it is driven by a regulated magnet. In addition to high dosing accuracy and high efficiency, it can help to improve process safety through automatic monitoring of hydraulic conditions and sensorless pressure monitoring.

For operators
The more precise the control of a metering pump, the better the dosing.
The solenoid gamma / X is equipped with a low-wear, controlled magnetic drive.
Together with an automatic air vent and the detection incorrectly sized suction / discharge lines makes the new drive for high reliability.
The magnetic regime embraces Durckabweichungen and protects the network without additional (error-prone) sensors against overpressure.

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