Profile: Xiamen Dervos Industrial Valves Co., Ltd is a supplier of forged valves. We are an ISO 9001 certified company. Our bolted bonnet forged gate valve is a kind of forged steel gate valve whose bonnet and body are connected by bolt. These valves are sealed with wound gaskets and are easy to maintain. Our forged cryogenic valve is designed for low temperature working condition, down to -196°C (-321°F). It facilitates the transfer of liquid natural gas, liquid nitrogen, liquid hydrogen, carbon dioxide and so on. Our forged cryogenic valves feature a top entry bolted bonnet designed for easy in-line maintenance.