BV-300 Diaphragm and Needle Type. The device of which the part to contact liquids is made of Teflon is suitable for liquids containing anaerobic adhesive and solvent. 2. BV-301 Diaphragm and Suck-Back Type. The device of which the part to contact liquids is made of Teflon is suitable for rubber bond. 3. BV-302 Suitable for small-quantity quantitative dispensation for multi-points simultaneous application. 4. BV-303 Most suitable for large capacity works. 5. BV-304 The big orifice is fit for dispensation of lubricative materials. 6. BV-305 Capacious valve for liquid resin. 7. BV-306 The valve for high pressure pumps is suitable for sealing by dispensing a large amount of liquids.