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TWO-POSITION GATE AND SPRUNG GATE VALVES HAVING A FULL-FLOW OPEN POSITION AND A RESTRICTED-FLOW OPEN POSITION
TWO-POSITION GATE AND SPRUNG GATE VALVES HAVING A FULL-FLOW OPEN POSITION AND A RESTRICTED-FLOW OPEN POSITION
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机译:具有全流量开放位置和受限流量开放位置的两位置闸阀和弹簧门阀门
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摘要
A two-position gate valve has a gate defining a full-flow passageway therethrough and defining a restricted-flow passageway therethrough, without defining a closed position. The full-flow passageway has an entrance with a first area and an exit with a second area, the second area being smaller than the first area, and the full-flow passageway continuously tapers from the entrance to the exit thereof. The restricted-flow passageway has an entrance with a third area and has an exit with a fourth area, the fourth area being smaller than the first area, the second area, and the third area, and the restricted-flow passageway continuously tapers from the entrance to the exit thereof. Flow through the full-flow passageway is in a first direction and flow through the restricted-flow passageway is also in the first direction and the ratio of the fourth area to the second area is in a range of 5 to 15.
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