The Oval Wheel Meter Series OaP / OP from Bopp & Reuther is a precision positive displacement flow meter designed to measure the volume of liquid raw materials, intermediates, and finished products. Its mechanical or electronic counting system offers flexibility for various process needs, while its double-case construction provides exceptional strength and safety under demanding operating conditions.

With no need for straight inlet or outlet pipe sections, the OaP ensures installation flexibility and consistent accuracy regardless of liquid viscosity. Its rugged cast steel pressure body combined with optional aluminum, brass, or stainless-steel wetted parts allows compatibility with a broad spectrum of fluids—from hydrocarbons and solvents to corrosive chemicals and bitumen.

Built to perform in extreme environments, the OaP operates efficiently between -40°C to +290°C and pressures up to 100 bar, maintaining outstanding accuracy of ±0.05% to ±0.5% and repeatability of ±0.02%.

It’s also the only SIL 2-certified oval wheel meter in the world, offering industry-leading reliability and safety assurance for custody transfer and process-critical applications.

Technical Specification:

• Exceptional Accuracy: ±0.05% to ±0.5% with excellent repeatability
• Versatile Viscosity Range: Measures both low- and high-viscosity liquids
• Easy Installation: No straight pipe sections required before or after meter
• Maintenance-Free Operation: Robust, wear-resistant design ensures long service life
• Compact and Reliable: Double-case design guarantees mechanical strength and leak safety
• Certified Safety: SIL 2-certified and available in explosion-proof configurations
• Flexible Integration: Compatible with mechanical and electronic counters