Ductile Iron Heavy Duty Manhole Circular Cover with Square Frame Ventilated Manual Locking, D400

Double Hinged
Double Hinged System
Single Bolt and Serrated Shaft Are Used In Hinged System
Double Hinged System Ensures Cover opening At 180˚
Hinged System Prevents Unauthorized Use
Rubber Gasket
The Groove of the Cover is cleaned by Using Lathe Machine for Rubber Gasket System
One of the Rubber Gasket System is Using T Shape Gasket
Rubber Gasket System Prevents Noise Pollution
Manuel Locking
Three Bolts Locking System Available
Three Single bolts are Used In Manual Locking System
Locking System Prevents Unauthorized Use