| 摘要 |
The slide or gate valve (10) suitable in particular as pressure valve comprises a valve housing (12) in which a relatively wide and preferably double-walled closure body (14) is displaceable. The sealing of the closure body (14) within the valve housing (12) in the closed state is via a pressure-activatable seal (66). Downstream of the closure body (14) a tubular member (30) of increased diameter is disposed which serves as expansion member. The features of the very wide closure body, the pressure-activatable seal and the expansion member (30) make it possible to actuate the valve when pressure is in the conduits through which a gaseous or liquid medium charged with a high proportion of solid is conveyed.
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