Looking for high-quality circular manhole covers? Look no further than our factory! Our NLIW products are durable and reliable, perfect for any project.
Circular Manhole NLIWSpecifications ● Manhole main part steel 1.4301 / 1.4404 ● Manhole cover steel 1.4301 / 1.4404 ● Gasket made of silicone ● Plastic handle ● Opening type ● Matte treatment on both inner and outer ● OD 600mm ● Welded with full welding technologyAlternatives● Optional 304, 316, 316 L Steel ● Polishing degree selection 0.4μm-0.8μm ● Treatment could also be mirror polishing or sandblast ● Handle material could be Stainless Steel ● Gasket is optional with different grades of quality ● Collar thickness can be customized as requested ● Height can be customized ● Gasket material can be an alternative EPDM , FPM ● OD also could be 200/300/400/450/500PRODUCT PARAMETERSStandard size /* At temperature 50℃/122℉ Please refer to the specifications on the right *1BAR ≈14.5PSI≈0.1Mpa
Specifications ● Manhole main part steel 1.4301 / 1.4404 ● Manhole cover steel 1.4301 / 1.4404 ● Gasket made of silicone ● Plastic handle ● Opening type ● Matte treatment on both inner and outer ● OD 600mm ● Welded with full welding technology Alternatives ● Optional 304, 316, 316 L Steel ● Polishing degree selection 0.4μm-0.8μm ● Treatment could also be mirror polishing or sandblast ● Handle material could be Stainless Steel ● Gasket is optional with different grades of quality ● Collar thickness can be customized as requested ● Height can be customized ● Gasket material can be an alternative EPDM , FPM ● OD also could be 200/300/400/450/500 PRODUCT PARAMETERS Standard size /* At temperature 50℃/122℉ Please refer to the specifications on the right *1BAR ≈14.5PSI≈0.1Mpa 
