1. Solenoid valve (Solenoid valve): A fluid control component that drives the opening and closing of the valve by generating electromagnetic force through an electromagnetic coil. It is one of the commonly used actuators in industrial process control.
2. Working pressure difference: It refers to the difference between the inlet pressure at the front end and the outlet pressure at the rear end of the solenoid valve when it is in the closed or open state. The magnitude of the working pressure difference is one of the main factors in choosing the principle and structure of an electromagnetic valve.
3. Nominal pressure: It refers to the maximum working pressure that the valve body of the solenoid valve, which is designed to comply with all the indicators of the factory test and type test stipulated in the national professional standard JB/ T7352-94, can withstand. It is generally 1.2 to 1.5 times the working pressure difference (the factory test index is 1.1 times the marked nominal pressure, and the sealing performance test is 1.5 times the nominal pressure).
4. Electromagnetic coil: It is a component of the driving part of the solenoid valve, mainly formed by winding special enameled wire that generates two-pole magnetic fields in accordance with technical requirements. Its enameled wire is fundamentally different from the enameled wire commonly used for motor mounting (it generates two-pole magnetic fields, has high efficiency, and needs to be imported).
5. Moving magnetic core: It is another core component of the solenoid valve drive part. It is a synthetic metal material formed by special physical and chemical processing of multiple benign metal element components, specially developed for solenoid valves, and has excellent magnetic attraction and magnetic dissipation properties.
6. Bistable state: Also known as a self-holding state, it is a new type of technology, which means that on and off are two stable points. After the object is turned on or off, it does not consume energy and remains in its natural state (mainly maintained by permanent magnetic coils). This type of solenoid valve is mainly used in situations where energy conservation or low-pressure drive is required.
7. Normally open type: Closed when powered on and opened when power is off. It is advisable to choose this type when the solenoid valve needs to be opened for a long time and the continuous opening time far exceeds the closing time.
8. Normally closed type: Opens when powered on and closes when power is off. It is advisable to choose this option when frequently switching between on and off or when the on time does not exceed the off time.
9. KV value: Under specified experimental conditions, that is, when the pressure difference across the valve is 1 bar, the flow rate of clear water at 5 to 40℃ passing through the valve per cubic meter (㎡/h) per hour at the rated stroke. The flow coefficient is one of the static characteristic indicators of a valve, characterizing the size of its flow capacity. It can be expressed by KV value, CV value, and effective cross-sectional area S.
10. CV value: The flow coefficient in the imperial system, that is, the number of US gallons per minute of clear water flowing through the valve at 40 to 100℃ when the pressure difference is 1 pound per square inch.
11. Viscosity: The main indicator of medium oil, which can be expressed as dynamic viscosity (denoted by V, with units of Poise(poise), Cp(centipoise)) and kinematic viscosity (the ratio of dynamic viscosity to the density of the fluid, with units of CSt (centipoise), m㎡/s). In China, kinematic viscosity is mainly used for expression.
12. NBR: Nitrile rubber, a standard elastomer, is mainly used as an elastic valve seat or sealing material. It is suitable for neutral media such as air, water, and light oil, and is used as a sealing material when the fluid temperature is in Group T1 (specifically -18℃ to 82℃).
13. PTFE: Polytetrafluoroethylene, commonly known as "Plastic King", has excellent chemical stability and is suitable for use in steam and high-temperature hot water at fluid temperatures of Group T4 (<=180℃) and Group T5 (<=220℃). It is often used in valve bodies and internal components.
14. Red copper: It is used as the sealing material for high-temperature valve bodies, with temperature groups of T6 (≤ 250℃), T7 (≤ 350℃), and T8 (≤ 400℃).
15. Fluororubber (FKM, VITON): A fluorocarbon elastomer with strong acid and alkali resistance, suitable for acidic and alkaline fluids with temperature groups T1 (specifically -18℃ to 177℃), mainly used for processing carbohydrates, engine oil, gasoline, solvents, and liquids.
16. Fluoroplastic: A diaphragm material suitable for acidic fluids, with weak high-temperature resistance and not suitable for hot water or steam.
17. Silicone rubber: A diaphragm sealing material suitable for sanitary-grade edible fluids.
Above is Professional Terms And Explanations Of Solenoid Valves content, to learn more related information are available at https://www.joosungauto.com/.
