Silver Automation Instruments Releases High-Viscosity Oil Flow Meter Selection Guide as Heavy-Oil Metering Demand Grows The guide compares oval gear, helical gear and Coriolis meters for heavy fuel oil, lubricants and resins, with viscosity limits and flow derating data.NANJING, CHINA - Media OutReach Newswire - 27 October 2026 - Silver Automation Instruments Ltd.