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美國VERSA黃銅往復閥SV-3-316是一個兩個入口，一個出口裝置，利用一個自由移動梭來阻止兩個入口之一，同時允許未被阻塞的入口流向出口。
當壓力信號施加到其中一個入口端口時，穿梭裝置阻擋相反的入口端口并且流動通過出口。航天飛機將保持這種狀態直到原始信號被移除或更高的壓力信號被施加到相反的入口端口。從邏輯上講，梭閥是一個“或”功能
美國VERSA黃銅往復閥技術規格
結構:黃銅體，丁腈橡膠（丁腈橡膠）密封件
服務:氣動至200psi（13.8巴）;液壓到500 psi（34.5 bar）
功能:梭閥

端口尺寸/流量:1/4“NPT / 1.8 Cv，3/8”NPT / 4.5 Cv，1/2“NPT / 4.9 Cv，3/4”NPT / 7.3 Cv

側移

Versa Shuttle Valves are constructed of solid Brass or 316 Stainless Steel, with resilient seals providing tight shut off. Shuttle valves are 3/2 valves, primarily used to charge and discharge a pressure line or chamber from two - or more - sources.

Shuttle Valves have a free moving shuttle that blocks one of two inlet ports while the other inlet port is connected to the (common) outlet port. When a pressure signal enters the port blocked by the shuttle, it will cause the shuttle to shift over to close the opposite inlet port. The shuttle will stay there while the line or chamber connected to the outlet port is charged and/or discharged and will only shift when pressure is applied to the inlet port it is blocking at that time. In logic terms a shuttle valve is an ‘OR’ - function