Handy Lock System is the locking mechanism without bolts or clamps. You can tighten or release the lid just by turning the handle. Combining a Handy Lock System with a Cap Balancer makes it possible to quickly open and close the manhole.
full vacuum - 0.2Mpa
SUS304 and SCS13 (except bearings)
Handy lock system does not include manhole body, lid and packing. These parts must be produced separately based on the reference drawing. The reference drawing can be downloaded from the download page.
The movement of the hook of the Handy Lock System is as the followings.