Product Description Water Swelling Friction Bolt is made by high strength welded tube folded itself and welded to seal at both end of bolt. Working principle: When the bolt is used in the hole, the bush with a hole is connected with a chuck of a high-pressure water pump. Start the pump and inject the water into tube, the folded wall of bolt is forced to expand. When the pump reaches a standard pressure, the wall of bolt holds onto the strata and creates a big friction strength to support.Thus, a safety and stable support system is formed. Advantages of Water Swelling Friction Bolt: 1. Simple installation, saving labor cost. 2. Be used in wide variety of ground conditons. 3. With high supporting strength. Product Parameters Item No. Bolt…
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