Introduction to the Selection Basis of NOGREN Solenoid Valve in Germany

German NOGREN solenoid valve selection basis: First, according to the parameters of the pipeline, select the nocrown solenoid valve: diameter specification (DN), interface mode 1. Determine the diameter (DN) of the pipeline according to the internal diameter or flow requirement of the pipeline. 2. Interface mode, generally > DN50 should choose flange interface, and < DN50 can choose freely according to user's needs. 2. Selecting NOGREN solenoid valve according to fluid parameters: material and temperature group 1. Corrosive fluids: Corrosion-resistant Novo crown solenoid valve and stainless steel are preferred; Food-grade stainless steel solenoid valve is preferred for super-clean fluids. 2. High temperature fluid: The solenoid valve made of high temperature resistant electrical material and sealing material should be selected, and the piston structure type should be chosen. 3. Fluid state: large to gaseous, liquid or mixed state, especially when the caliber is larger than DN25 order must be distinguished. 4. Fluid Viscosity: Usually under 50cSt can be chosen arbitrarily, if more than this value, you should choose high viscosity Novocrown solenoid valve. 3. Selecting NOGREN solenoid valve according to pressure parameters: principle and structure 1. Nominal pressure: The meaning of this parameter is the same as that of other general valves. It is determined according to the nominal pressure of the pipeline. 2. Working pressure: If the working pressure is low, the principle of direct or step-by-step direct operation must be chosen; when the minimum working pressure difference is above 0.04 Mpa, the direct, step-by-step direct operation and pilot type can be selected. 4. Electrical selection: Voltage specifications should give priority to AC220V and DC24, which are more convenient. Fifth, according to the length of continuous working hours to choose: Normally closed, Normally open, or Sustainable power 2. If the opening time is short or the opening and closing time is not long, the normal closing type is chosen. 3. However, some working conditions used for safety protection, such as furnace and kiln flame monitoring, can not be open regularly, so long-term power-on type should be selected. 6. Select auxiliary functions according to environmental requirements: explosion proof, check, manual, waterproof fog, water spray, diving 1. Explosive environment: Neogreen solenoid valves of corresponding explosion-proof grade must be selected (our company has d II BT4, D II CT5, Ex m I/II T4). 2. When there is backflow in the pipe, OK71-N and OK72-N series solenoid valves with check function can be selected. 3. When manual operation of NOGREN solenoid valve is needed, OK71-S and OK72-S series solenoid valves with manual function can be selected. 4. Waterproof and dust-proof varieties should be selected for open-air installation or dust-proof occasions (protection grade is above IP54). 5. Diving solenoid valves must be used for fountains (protection level is above IP68). 1. When the NOGREN solenoid valve needs to be opened for a long time, and the excess closing time should be chosen as the normal open type. Features to be noted when choosing to use