The quick open blind plate, is used for pressure pipeline or circle opening of pressure container, also can quickly open or close, belongs to mechanical device. It generally consists of cylinder flange, head cover, yoke, sealing ring, safety interlock mechanism, switching mechanism, tumbler and other parts.

Classification of quick open blind plate:

1 Paddle wheel quick open blind plate: It adopts concentric two-bar blind plate. There is neither relative moving nor attrition among blind plate and sealing part. So the sealing part will not be damaged.

2 Locking ring quick open blind plate: It provides quick switch structure for receiver & launcher of level or vertical pipeline. It is designed to open any kind of upright or horizontal pressure container in short time. It has more reliable and safe operation than other quick open blind plate. Other quick open blind plate in any size could not open or close in less than one minute without special instrument.

3 Three-lipped clamp quick open blind plate: Due to no relative motion between sealing surface of blind plate and sealing ring, the whole system gets better sealing effect. The three lips simultaneously move while locking, and bear averaged force. So length of open screw is reduced and the switch is more flexible and reliable. Simultaneously stress area of bite teeth is enlarged. This kind of quick open blind plate is more suitable for gas pipeline with high pressure and large diameter.