SYI can supply ductile iron Gas Discharge Manhole Cover, with clear opening 930X630mm, with gas discharge valve, with shock absorber.
SYI Ductile iron Gas Discharge Manhole Cover is made from spherical graphite cast iron (ductile iron) by machine moulding. Very good quality, smooth and free from sand holes, blow holes, distortion or any other defects. We have two exist moulding which loading capacity is 40 tons and 90 tons.
