Uhlu Lokuphakathi: 1. Isingeniso 2. Ukubaluleka Kwama-Valves e-Beer Sampling. Izinhlobo ze-Beer Sampling Valves 3.1 Ballves 3.2 I-Valves ye-aedle Valves 3. I-Diaphragm Valves 3.4 I-Piston Valves 4. Izici eziyinhloko zokucabangela u-4.1 Okwakhiwa Kwezinto 4.2 Ukulawulwa Kwe-flow Mechanism. 5. Indlela Yokukhetha Isilinganiso Esifanele Sebhile 5.1 I-Desere