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