The manhole cover is made of cast iron. These lids must be heavy enough to prevent them from falling off when the vehicle is run over. Some of the manhole covers have open prying holes to facilitate the flow of water into the manhole, while others have hidden rubbing holes that do not run through the entire lid or have lifting devices such as pull-down handles and ring handles. From a safety point of view, the manhole cover can be bolted to the frame. The manhole cover can also be provided with washers at the bottom and bolted to the frame, which is usually considered to be waterproof.
Dalian Guli Mechanical and Electrical Technology Co., Ltd. is the top regional source of building castings, including Derrick / cover, catchment entrance, ditch drain, public castings, bridge trenches, detectable warning panels, downwater boots, tree grille, airport castings, watertight covers, known as the source of the top area of architectural castings. With our inventory of 5000 tons of HOE and EJ castings, we are able to serve almost any construction project in the world. From our sales and distribution site in Dalian, we can ship goods to the whole country.
Dalian Guli Electromechanical Technology Co., Ltd. has rich experience and professional technical team in the field of metal processing, and can provide customers with high-quality metal processed products and services. Its products have a wide range of application, covering machinery manufacturing, engineering construction, shipbuilding industry, chemical piping, petroleum industry, communications industry, aerospace, automobile manufacturing, home appliance manufacturing, building decoration and other fields. In addition, the company also provides non-standard customized processing services. We know that each customer's needs are unique, so we rely on professional technology and rich experience to tailor metal processing products for customers that meet their special requirements. From design to production, strictly control every link to ensure the quality and accuracy of non-standard customized products and meet customers 'personalized needs in different scenarios