I. Introduction The operation and maintenance manual book for equipment installation, commissioning, operation and maintenance of the fault description applies only to the crown green spiral off valve series models. In the installation, commissioning, operation and fault repair before reading the instructions carefully and keep for future reference. Second, the scope spiral off valve is mainly used to eliminate groundwater and underground water and other water sources, including the solid particles in the water treatment field Grit, down and dirty, solid-liquid separation effect is significant product features 1, except High pollution efficiency, easy clean-up, cancel previous decontamination after bypass valves and tubes, small resistance and constant advantages. 2, simple structure, low cost, easy to install and operate, require little maintenance. 3, increasing the filtration unit (filter accuracy is selected by the user), with a grit removal rate, saving space, the low rate of leakage capture individual tiny particles, work status stability, etc. Fourth, the technical parameters 1. Treatment effect Grit diameter :> 0.1mm water turbidity: ≤ 10NTU head loss: <0.02Mpa 2 influent raw water turbidity:. ≥ 300NTU Water pressure: ≤ 0.25Mpa Working temperature: room temperature V. spiral off valve works based on centrifugal sedimentation and density difference of principle, when the water under certain pressure into the tangential inlet from Desander After entering the device, resulting in a strong rotation, due to the different densities of sand in water, under the combined effect of centrifugal force, centripetal force, etc., so that the density of the low The water rises, discharged from the outlet, high density sand discharged from the bottom of the device outfall. Desander than the current market, increasing the filtration unit (filter accuracy is selected by the user), with a grit removal rate, saving space, the low rate of leakage capture individual tiny particles, work status, etc. Seven stable, Installation 1. equipment must be installed horizontally, attention to the installation direction of the arrow, the arrow indicates the direction is the direction of flow. 2 Since the device during operation with no moving parts, maintenance-free, so the design, installation can be arranged according to the actual situation. 3 Import piping device should be provided near the orifice of the pipe support; directly connected to the nozzle of the container is greater than or equal to DN150 valve should be set below the bracket. 4 spiral Cleaner and export are GB flange. Equipment inlet and outlet valves are required to install. Eight, the use of 1. During normal operation, the need to open the inlet and outlet valves, close the drain valve. (2) When the sewage drain valve open until the effluent water. 3 After the sewage is complete, close the drain valve can be. [4] The lack of sewage pressure to close the valve at the outlet. 5 installation should pay attention pipelines and flow direction. 6 layout managers need to operate out of space. Since the device operation with no moving parts, that is, the equipment maintenance. But the need to maintain a stable entrance load, the drain valve opening and closing force uniform, avoid man-made damage. Hangzhou Laurel Environmental Technology Co., Ltd. is a commitment to scientific research, production and sales of water treatment equipment, filtration equipment, water industry professional valve manufacturer. There are self-cleaning water filters exhaust, constant pressure water vacuum degassing unit, water processor family, screw degassing decontamination other four series, covering electronic cleaning device, electronic water processor, constant pressure water unit Vacuum Water pressure exhaust unit, the entire integrated water processor, vacuum degasser, tank water processor, next to the water processor, screw degassing decontamination, air impurities spiral separator and so on. http://www.gvguan.net/chuwuqi/4.htm