Ductile iron manhole cover has the advantages of light weight, high strength, good toughness, corrosion resistance, fatigue resistance, proper cost, grey cast iron manhole cover with the same size as compared to words, with the use of strong, drainage effect, long service life, we added a layer of good anti-theft device face when in use, the latch form, it has been applied for and obtained the national patent.
The dark bars from the fixed holes and the spring shaft and thrust fixing clip connection, open the lock and insert special mention clockwise 90 degrees, so that the latch cover does not need to exit the extraction, hand lock, auto lock, simple, stable and reliable. And our products are equipped with anti-theft anti - noise device, can avoid the noise, so as to bring peace to the lives of residents.
First, anti-theft performance is strong
Anti theft cast iron casting, non professionals can not destroy, fundamentally solve the lost cover of social problems.
Two, well cover does not jump cover
With the well ring geometry design is reasonable, which covers do not flip the oncoming traffic after the shift.
Three, manhole cover no noise
Each cast iron manhole cover is machined by a lathe to solve the noise caused by wheel rolling.
Four, covers long life
Three card bulletproof cast iron manhole covers are normally used for more than 30 years under -40oC 80oC outdoor conditions。
Five, beautiful appearance
Light weight, heavy load, clear casting pattern, good anti slip performance.
Ductile iron manhole cover is mainly made out of ductile iron manhole cover, this kind of cover quality is good or bad, it involves the problem of balling rate.
We would like to serve the eight guests with the best sense of service, and sincerely cooperate with friends from all walks of life at home and abroad for a better future。 Welcome to visit and negotiate!