A special design of barrel type shaft seal in HAIHE HQDL pump has greatly improved is dependability to ensure safe operation and to make servicing and checkup much easier and fast.

• 在海河HQDL系列水泵中专门设计的筒式（集装式）釉封提高了可靠性，确保了安全运转，并使维修和安装变得方便快捷。