Product Description                Locking-ring quick opening closure consists of  blind plate cover, barrel flange, integral scalable locking ring, self-tightening sealing ring, opening structure and safety locking device.        Please check the following detail structure:       Our Lock ring quick opening closure can be designed to open any special equipment within 1 minute         as usual. Lock  ring quick opening closure can  open any vertial or horizontal type pressure vessel  in very         short  few minutes. Compared  with other QOC, its can operate safely. Without any special tools,  it can         open or close  any specification vessel within 1 minute . Safety -- Built to meet  all  the  international codes and key operator specifications. Robust com-         ponents to avoid damage caused by misuse.Upto three levels of safety interlock to avoid opening under         pressure. Speed and simplicity of opening.  Ease of maintenance--Designed for ease of maintenance,using a simple lip seal arrangement.          Company Information   FAQ