Liquid Volumetric Filling ⚫ Types of valves: a reciprocating valve and a rotating valve (Figure 20.6). Rotary valve Reciprocating valve Figure 20.6 ValvesLiquid Volumetric Filling ⚫ Types of valves: a reciprocating valve and a rotating valve (Figure 20.6). Rotary valve Reciprocating valve Figure 20.6 Valves