Safety Manhole Cover
Certified by Ministry of SMEs and Startups (EPC) • 100% Unpowered Automatic Guardrail Deployed Instantly Upon Opening
Safety Manhole Cover
Official EPC Performance Certification from MSS • Zero-Delay Mechanical Guardrail Deployed Automatically Upon Opening
Unpowered Safety Infrastructure Eliminating Fall Accidents at Plant Openings and Walkways
Developed to prevent fatal fall accidents at manhole openings across sewage/water treatment plants and pedestrian roadways, this is the world's first innovative public safety infrastructure solution.
By mechanically linking the physical rotational force generated during cover opening through precision gears, ANSI/OSHA-compliant fall protection guardrails and safety barrier straps deploy automatically around the entire perimeter.
World-First Safety Manhole 4-Axis Operation Simulation
Demonstration videos showing the immediate, zero-delay mechanical deployment of safety guardrails as the cover opens. Click the cards below to view each simulation.
1 DOOR Opening Type (Inspection / Sampling)
Engineered for routine water sampling and visual inspection in treatment basins. Opening just a single door automatically deploys built-in handrails and barrier straps to firmly guard the opening and safeguard inspector safety.
2 DOOR Full Opening Type (Maintenance / Equipment Entry)
Applied when large equipment entry is required, such as installing heavy gear units or maintaining submerged pumps. Opening both doors mechanically interlocks a 4-sided heavy-duty guardrail surrounding the entire perimeter, instantly converting hazard zones into safe workstations.
4 DOOR Inspection Type (4-Direction Guard Coupling)
Tailored to large underground utility tunnels and public pits. Allows sequential or simultaneous opening of all 4 doors depending on inspection goals. The multi-axis gear linkage completely prevents fence distortion or mechanical jamming.
4 DOOR Equipment Entry Type (Unpowered Hoisting)
A dedicated infrastructure lineup designed for loading and unloading large rotating machinery, pumps, and heavy maintenance tools into underground facilities via unpowered wide opening of all 4 doors.
| Comparison Item | Conventional Manhole | Linkon Safety Manhole (EPC Certified) |
|---|---|---|
| Required Labor | Minimum 2+ workers required (high risk of back injury) | Single-operator opening (assisted gas spring & hinge linkage) |
| Fall Protection | Requires carrying and manually erecting separate portable barricades | 100% unpowered automatic guardrails deploy simultaneously as cover opens |
| Preparation Time | Substantial setup/teardown time required for transportable fences | Safe workstation established immediately upon opening; prep time reduced by 90% |
| External Power / Tools | Requires specialized tools or heavy anchor supports for barricades | Pure mechanical unpowered linkage (zero external power or tools needed) |
| Maintenance Flexibility | Single heavy cover forces full opening, leaving fall hazards uncovered | Modular split doors open individually according to task (sampling vs entry) |
| Official Certification | EPC Performance Certification from Ministry of SMEs and Startups (No. 21-AAZ0384) |
| Static Load Testing | Passed 50 kgf (0.49 kN) perpendicular concentrated load testing on rails and posts with zero permanent deformation |
| Certified Standards | Fully compliant with US ANSI and OSHA occupational fall protection barrier standards |
| Lineup Configurations | 1 DOOR Inspection / 2 DOOR Full Opening / 4 DOOR Inspection / 4 DOOR Equipment Entry |