Adjusting device

The utility model discloses an adjusting device. An example apparatus includes: a first pneumatic regulator including a loading chamber, the first pneumatic regulator flowing a fluid to a downstream process; a second pneumatic regulator coupled between the loading chamber and the downstream process, the second pneumatic regulator controlling actuation of the first pneumatic regulator during normaloperation based on a pressure difference between a first pressure downstream of the first pneumatic regulator and a second pressure within the loading chamber; and a valve coupled between the loadingchamber and the downstream process, the valve controlling actuation of the first pneumatic regulator during a closing event. 本实用新型公开了调节装置。示例性装置包括：第一气动调节器，其包括加载室，第一气动调节器使流体流向下游过程；第二气动调节器，其耦接在加载室与下游过程之间，第二气动调节器在正常操作期间基于第一气动调节器下游的第一压力与加载室内的第二压力之间的压力差来控制第一气动调节器的致动；以及耦合在加载室与下游过程之间的阀，该阀在关闭事件期间控制第一气动调节器的致动。