A customised tool is inserted into an access tube and turned to screw the lid out of the seat. The lid is now turned through 90 degrees, the tool is partially withdrawn, and the lid is rolled away on tracks. (It is opened and closed in the same way as the lid of the Screw-lid vault). In this way relatively large and heavy lids may be opened without requiring a crane. Suitable for reservoirs, valve-chambers, etc.
Same opening sequence as above. The relatively small hand-lid fits into a concrete ‘seat’ which is large enough to cover a relatively large manhole in a roofslab. The seat can be detached from the roof-slab, from the inside of the valve-chamber, in case a large valve needs to be installed/replaced. Suitable for retro-fitting valve chambers that have relatively large (steel) lids.
This lid is supported by the roof-slab, and once unlocked, slides open with relative ease. Suitable for valve chambers where a large opening is required for servicing the valves etc.
Five concrete lids are discussed here, all having extremely robust locking mechanisms.
Suitable for relatively large manholes in valve chambers where quick and easy access is required, and where the opened lid must be clear of the manhole. Once the custom tool has unlocked the lid, the lid may be rotated through 90 degrees.
A customised tool is inserted into the access hole and used to unlock two opposite rack-levers below. The lid may now be lifted out of the slab by the tool's handle. Suitable for small manholes in valve chambers or reservoirs.
This product has application where a customer requires a fully made roof slab, (complete with a lockable lid), to cover a existing valve chamber.
We protect your sub-stations, pump houses, pump stations, control rooms, valve chambers, sewer plants, boreholes, generators, transformers, control panels, valves and cathodic equipment with concrete doors, vaults, lids and vents.
Protect and secure your structures and equipment with our extreme, high-protection products made with chisel proof Y12 rebar reinforcing and 60MPa concrete, offering extreme protection.