平行阀座闸阀由两个可互换弹簧负载阀瓣，一个全导向阀瓣托架和扣环销钉构成。
The parallel seat gate assembly consists of two interchangeable spring loaded discs, a fully guided disc carrier, and retaining pins.
经故障分析，并在制造厂家指导下解体检查发现该操动机构分合闸导向阀的固定密封垫存在设计上的缺陷。
The design defect was found on the fixed sealing gasket in the guide valve of the operating mechanism.
另外，本发明还提供一种检测方法，该方法在具有上述手动操作装置的电动导向阀发生故障时，能检查导向阀的故障原因。
In addition, the invention further provides a detection method capable of detecting error reason of the pilot valve when the manual operation device for electric pilot valve breaks down.
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