Advantages: Excellent stepless adjusting mechine; High accuracy and repeatability over the widest range of flow; Superior accuracy at constant flow; Low maintenance, no metal-to-metal contact in measuring chamber, Long life service; Low pressure loss, a true gravity flow meter; Accuracy regardless of pressure fluctuations, temperature variation, viscosity; Choice of aluminum, cast iron, brass and stainless steel materials of construction. Application: 1.refined petroleum products; 2.aviation gasolines and jet fuels; a wide variety of products such as: liquid sugars, corn syrup, corn sweetners, dextrose, fructose, sucrose, maltose, lactose, corn oil, soy bean oil, cotton seed oil, coconut oil,. 3.treated waters (deionized, demineralized, and potable); 4.chlorinated solvents and general solvent metering; 5.acid pH liquids; 6.liquefied petroleum gas(LPG); 7.crude oil, also for heated and/or viscous liquids; oil or water based latex products, polyester resins, and adhesives (neutral pH), also for metering herbicides and nitrogen fertilizer solutions; 8.herbicide; 9.sodium hydroxide (caustic) solutions, high sulfur crude oil (LACT and NOD) and other alkaline pH liquids 10.abrasive liquids