Wind power is used as a clean energy source all over the world. Glass fiber and carbon fiber composites have become well established as materials for wind turbine rotor blades. These combine essential properties such as high strength, low weight and long life. Rotor blades are not cast in one piece. The top and bottom are each cast separately and then joined into a unit through an adhesive process. Adhesives made of glass fiber, carbon fiber, silicone and other composite materials are used. These are highly viscous and abrasive. The goal is to create a fast and durable bond - a challenge for measurement technology. Even the smallest errors can lead to serious additional costs.

Spiral flow meters (SRZ), measurement of highly viscous media

Spiral flowmeters (SRZ) are volumetric flowmeters primarily used for highly viscous, abrasive, filled, lubricating and non-lubricating media. Polyurethane, polymers and viscous materials, as well as greases and oils of all kinds are among them. Thanks to the design, temperature fluctuations and the resulting change in the viscosity of the medium have only a marginal effect on measurement accuracy. Only high-quality stainless steels that can withstand even corrosive media are used to manufacture the spindle flow meters. Short response times, highly dynamic behavior and high measurement accuracy ensure precise regulation and control of volume flows within demanding applications.

HELICAL FLOW METER IN USE UNDER THE TOUGHEST CONDITIONS

Solution

KEM helical flow meters (SRZ series) withstand extensive abrasion forces and provide accurate measurement data even at high viscosities. A special metrological bearing concept ensures accurate measurement results, high reproducibility and a long service life.

Technical data

• Medium: adhesive
• Temperature: +20 °C to +40 °C [+68 °F to +104 °F].
• Pressure: 120 to 200 bar [1,740 to 2,900 psi]
• Measuring range: 8 to 12 l/min
• Viscosity: 50,000 to 300,000 cSt
• Density at 20 °C: 1,150 kg/m3