Petcock

（重定向自Fuel cock）

A petcock is a small shut-off valve used to control the flow of liquid or gas. Historically, petcocks were threaded valves controlled by a butterfly handle; modern petcocks are typically ball valves.

Compared to the progressive control of a gate valve a ball valve style petcock's is coarse, confining their use principally to on-off applications.

单词	Fuel cock
释义	Fuel cock 英语百科 Petcock （重定向自Fuel cock） A petcock is a small shut-off valve used to control the flow of liquid or gas. Historically, petcocks were threaded valves controlled by a butterfly handle; modern petcocks are typically ball valves. Compared to the progressive control of a gate valve a ball valve style petcock's is coarse, confining their use principally to on-off applications.
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