The preeflow® eco-PEN series is part of the rotating displacement pumps. The theory of function is comparable to an endless piston, which conveys the product from the suction end to the discharge end, thus building up a pressure difference. Further informationen
Potential cause: Motor (dispenser cable) is not connected Correction: Connect motor to eco-CONTROL unit Check all connections! Potential cause: Dosing needle is blocked, dosing needle is bent Correction: Clean and/or replace the dosing needle Potential cause: Material has hardened / cured Correction: Clean the dispenser Potential cause: The dosing needle is too small or too long Correction: Use a different dosing needle cross-section, reduce Dosing speed / flow rate Potential cause: Insufficient supply of medium Correction: Increase the supply pressure. Check for air-bubbles. Check the hose line. Potential cause: Stator is swollen Correction: Check material resistance, contact manufacturer
Potential cause: Reverse-flow is not correctly adjusted Correction: Adjust the reverse-flow (guidance in the operating manual Potential cause: There are air-bubbles in the medium Correction: De-aerate the medium (guidance in the operating manual) Potential cause: The Medium is compressible Correction: Degas the Medium
The length of the feeding line and the cross-section of the hose line used to convey the dispensing material to the dispenser have a great influence on the feeding pressure. And thus on the material supply at the dispenser. If the feed pressure at the dispenser is too low, the system is not supplied with sufficient material. The dispensing result becomes less precise and deviates from the values set on the controller. The flow rate at the end of dispensing will pulsate, in the worst case the system will run dry. Here you will find an online calculator. It can be used to easily calculate the pressure loss depending on the length and diameter of a hose or pipe line: http://www.druckverlust.de/Online-Rechner/
Materials such as silicones, paints or greases differ greatly in their properties. When dispensing these liquids, dispensing systems must adapt to the special requirements.
preeflow microdispensers convey and apply particularly flexibly and are suitable for a wide range of materials:
You can find a detailed overview here https://www.preeflow.com/en/fields-of-application/
Everyone knows the not always easy choice between "expensive" and "cheap" from their own purchasing behavior. This decision also has to be made when purchasing industrial goods: Should the components be as inexpensive as possible or do you prefer to rely on representatives of the premium segment?
Every eco-PEN is the result of more than 20 years of experience and further development. This experience has taught us that saving in the wrong place can lead to big problems. Downtimes, low product quality and a high reject rate produce costs that the investment in a "high-end" dispensing solution recovers very quickly. For this very reason, only the highest quality components and materials are used in the production and development of preeflow products.