Resistant to traffic conditions and silent thanks to its elastomer ring, Pamrex manhole covers are reliable and will stand the test of time. Designed to be opened using any type of tool (three different openings), its capacity to lock at 90° or 130° is a guarantee of safety for the operator. Its ergonomics facilitates network interventions.
Ductile Iron
The key to Pamrex’s strength is ductile iron. Ductile iron provides a superior strength-to-weight ratio, which allows up to a 50% weight savings compared to cast-iron designs.
Pamrex Design Features
Improved ergonomics
- Hinges reduce the physical effort by 50%. and allow operator to move in a straight line, thereby avoiding damaging spinal rotation.
- Hinges minimize the duration of the lift; the hinge also retains the cover in a safe and controlled way during and after the lift.
- Lifting points in the cover are designed for use with standard tools (pickaxe/hook/bar).
- Hinge incorporates a 90º blocking feature to prevent accidental closure.
Friendly Handling
- Self-centering design of the gasket eliminates the need to guide the cover into position when closing.
- Design of apertures ensures easy insertion and removal of tools.
- Lifting loops in the frame facilitate safe offloading and installation with the proper equipment.
- The cover is designed to open and release pressure if the sewer becomes surcharged.
- The cover can be removed if necessary.
Stability And Durability
Elastomer gasket rings absorb damaging traffic shock and help to prevent the breakdown of frame and bedding materials. Therefore, structural failure that can lead to more serious problems like frame instability is significantly reduced. Scientific analysis has clearly show that new gaskets absorb 64% of the shock, and even after many years of service continue to absorb over 50% of the shock. The elastomer gasket ring in the Pamrex manhole cover ensures stability, regardless of traffic conditions.