Category
Solenoid Valve Supplier
inquiry@ato.com.cnHow to Choose a Solenoid Valve?
Choose the solenoid valve according to pipeline parameters, including nominal diameter (DN) and interface type (also known as connection type).
1. Identify nominal diameter according to the internal diameter or flow of on-site pipelines.
2. For connection type, when DN is larger than 50, flange connection is preferred. When DN is no smaller than 50, either thread or flange connection is viable, and users can choose either one freely.
Choose the solenoid valve according to liquid parameters, including valve body materials, sealing materials, and temperature unit.
1. Corrosive fluids
Stainless steel or PTFE (polytetrafluoroethylene, or more widely known as the “king of plastics” ) is suitable to make the valve body. The fluororubber or PTFE sealing materials are adopted.
2. Edible or ultra-clean fluid
The hygiene-grade stainless steel is suitable to the valve body, and the silicone rubber sealing materials are chosen.
3. High-temperature fluids
Choose the solenoid valve made up of heat-resisting electronic materials and sealing materials, especially the solenoid valve with the pistol principle structure.
4. Fluid state
There is the gaseous state, liquid state or mixed state. When the nominal diameter is larger than 25, these states should be differentiated from each other for clarification of these states is related to the pilot hole parameters.
5. Fluid viscosity
The solenoid valve of any fluid viscosity can be chosen under 50cst. If above 50cst, the solenoid valve with a high fluid viscosity should be chosen.
6. Fluid cleanness
When the medium contains few impurities, the membrane structure can be chosen, or install the filter of any other structure before installation of the solenoid valve.
Choose the principle structure of the solenoid valve according to the pressure parameter.
1. Nominal pressure
The meaning of this parameter is the same to that of other general parameters, which can be decided according to 1.5 folds of the pipeline nominal pressure or use pressure.
2. Operating pressure differential
The operating pressure differential can be given by deducting the valve backend pipeline pressure from the frontend pipeline pressure. When there is no pressure differential or the pressure differential is low or it is in a vacuum status, the direct-acting type or step-wise semi-operating type must be chosen. When the operating pressure differential is above certain level, various principle structures can be chosen.
Select the power supply for the solenoid valve
1. There are AC and DC solenoid valves according to the supply power type. Generally, the access to AC power is more convenient.
2. The power voltage fluctuation usually choose +%10% & -15% for AC power or ±%10 for DC power. If exceeding the pressure differential, the pressure stabilizing measures should be adopted or special ordering requirements should be raised.
3. Choose the rated current and consumption power according to power capacity. Note that the VA is high at AC starting-up; when the capacity is inadequate, the pilot operated solenoid valve should be adopted.
Choose the control mode according to the length of operating hours or special needs, including Normally Closed type, Normally Open type, self-hold, and emergency switching-off (manual resetting).
1. The Normally Open solenoid valves can be selected, when the solenoid valve needs opening for a long time and the constant opening hours exceed the constant closing hours.
2. The Normally Closed solenoid valves can be selected, when the solenoid valve is constantly turned on and off, or the opening hours are short or the turn-on and turn-off hours are generally the same.
3. The emergency switching-off solenoid valves should be adopted, when there are some operating statuses to ensure safety, such as the furnace flame monitoring, combustion leakage alarm, and fire-fighting security linkage system. The long-term power-on type (the long-term power-on status is just a relative concept) should not be adopted, let alone Normally Open solenoid valves.
4. The self-hold solenoid valve (also known as the bi-stable state) is a new technology, which is mainly used to circumstances requiring conservation of energy or low-voltage driving.
Select the solenoid valves with the additional functions, such as anti-explosion, non-return, manual operation, water-proof fog, water spraying, and underwater diving, according to environmental requirements.
1. In inflammable and explosive environment, choose the anti-explosion solenoid valve of the corresponding grade.
2. When there is backflow phenomenon with the medium in the pipeline, the solenoid valve with the non-return function can be chosen.
3. When on-site manual operation is required for the solenoid valve, the solenoid value with the manual operation function can be selected.
4. Under circumstances of open-air installation or installation in a dusty environment, the waterproof or dustproof type (with the protection grade above IP54) should be chosen. As for the fountain or underwater pipeline, the underwater diving solenoid valve (with the protection grade above IP68) should be adopted.
1. Identify nominal diameter according to the internal diameter or flow of on-site pipelines.
2. For connection type, when DN is larger than 50, flange connection is preferred. When DN is no smaller than 50, either thread or flange connection is viable, and users can choose either one freely.
Choose the solenoid valve according to liquid parameters, including valve body materials, sealing materials, and temperature unit.
1. Corrosive fluids
Stainless steel or PTFE (polytetrafluoroethylene, or more widely known as the “king of plastics” ) is suitable to make the valve body. The fluororubber or PTFE sealing materials are adopted.
2. Edible or ultra-clean fluid
The hygiene-grade stainless steel is suitable to the valve body, and the silicone rubber sealing materials are chosen.
3. High-temperature fluids
Choose the solenoid valve made up of heat-resisting electronic materials and sealing materials, especially the solenoid valve with the pistol principle structure.
4. Fluid state
There is the gaseous state, liquid state or mixed state. When the nominal diameter is larger than 25, these states should be differentiated from each other for clarification of these states is related to the pilot hole parameters.
5. Fluid viscosity
The solenoid valve of any fluid viscosity can be chosen under 50cst. If above 50cst, the solenoid valve with a high fluid viscosity should be chosen.
6. Fluid cleanness
When the medium contains few impurities, the membrane structure can be chosen, or install the filter of any other structure before installation of the solenoid valve.
1. Nominal pressure
The meaning of this parameter is the same to that of other general parameters, which can be decided according to 1.5 folds of the pipeline nominal pressure or use pressure.
2. Operating pressure differential
The operating pressure differential can be given by deducting the valve backend pipeline pressure from the frontend pipeline pressure. When there is no pressure differential or the pressure differential is low or it is in a vacuum status, the direct-acting type or step-wise semi-operating type must be chosen. When the operating pressure differential is above certain level, various principle structures can be chosen.
Select the power supply for the solenoid valve
1. There are AC and DC solenoid valves according to the supply power type. Generally, the access to AC power is more convenient.
2. The power voltage fluctuation usually choose +%10% & -15% for AC power or ±%10 for DC power. If exceeding the pressure differential, the pressure stabilizing measures should be adopted or special ordering requirements should be raised.
3. Choose the rated current and consumption power according to power capacity. Note that the VA is high at AC starting-up; when the capacity is inadequate, the pilot operated solenoid valve should be adopted.
Choose the control mode according to the length of operating hours or special needs, including Normally Closed type, Normally Open type, self-hold, and emergency switching-off (manual resetting).
1. The Normally Open solenoid valves can be selected, when the solenoid valve needs opening for a long time and the constant opening hours exceed the constant closing hours.
2. The Normally Closed solenoid valves can be selected, when the solenoid valve is constantly turned on and off, or the opening hours are short or the turn-on and turn-off hours are generally the same.
3. The emergency switching-off solenoid valves should be adopted, when there are some operating statuses to ensure safety, such as the furnace flame monitoring, combustion leakage alarm, and fire-fighting security linkage system. The long-term power-on type (the long-term power-on status is just a relative concept) should not be adopted, let alone Normally Open solenoid valves.
4. The self-hold solenoid valve (also known as the bi-stable state) is a new technology, which is mainly used to circumstances requiring conservation of energy or low-voltage driving.
Select the solenoid valves with the additional functions, such as anti-explosion, non-return, manual operation, water-proof fog, water spraying, and underwater diving, according to environmental requirements.
1. In inflammable and explosive environment, choose the anti-explosion solenoid valve of the corresponding grade.
2. When there is backflow phenomenon with the medium in the pipeline, the solenoid valve with the non-return function can be chosen.
3. When on-site manual operation is required for the solenoid valve, the solenoid value with the manual operation function can be selected.
4. Under circumstances of open-air installation or installation in a dusty environment, the waterproof or dustproof type (with the protection grade above IP54) should be chosen. As for the fountain or underwater pipeline, the underwater diving solenoid valve (with the protection grade above IP68) should be adopted.
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