Year1
- 厂家：
- 诺冠
- 名称：
- 诺冠电磁阀
- 价格：
- 99元
Inquiry fax: (Remarks: Zeng Zhaozhong received)
Inquiry mobile phone: (service for you every hour)
Job: (fine Control)
The British RR solenoid valve is a world-renowned manufacturer and supplier of pneumatic products, providing pneumatic and fluid control solutions to customers around the world. Norgren produces and supplies a full range of pneumatic control and automation products through a selected dealer network and an international network of employees in countries around the world, all of which hold quality standard certificates. This ensures that customers can purchase the pneumatic products they need from Norgren, a reliable supplier. At the same time, Norgren designs and produces thousands of special products every year to meet the specific requirements of customers. Companies in various countries can provide customers with local sales including pneumatic control circuit design, pneumatic technology and product issues. Technical consultation on pipe joints, specialized application guidance
British RR solenoid valve Solenoid valves are divided into two types: normally closed and normally open. Generally, the normally closed type is selected. It opens when the power is on and closes when the power is off. However, the opening time is very long and the closing time is very short. It is time to choose the normally open type. Life test is generally a type test project in factories. To be precise, there are no professional standards for solenoid valves in my country, so be careful when choosing a solenoid valve manufacturer. When the action time is short and the frequency is high, the direct-acting type is generally selected, and the fast series is selected for large diameters.
The allowable liquid viscosity of the British RR solenoid valve is generally below, and if it is larger, it should be noted. Working pressure difference, when the maximum pressure difference in the pipeline is less than., direct-acting and step-by-step direct-acting types such as series should be used. When the minimum working pressure difference is greater than., pilot-operated (differential pressure type) solenoid valves can be used. The pressure difference should be less than the maximum calibrated pressure of the solenoid valve. Generally, solenoid valves work in one direction, so pay attention to whether there is a back pressure difference and install a check valve if so. When the fluid cleanliness is not high, a filter should be installed in front of the solenoid valve. Generally, solenoid valves require better cleanliness of the medium. Note that the flow aperture and pipe diameter solenoid valves generally only have two switches. If the control conditions permit, please install a bypass pipe to facilitate maintenance. When water hammer occurs, the opening and closing time adjustment of the solenoid valve must be customized. Pay attention to the influence of ambient temperature on the solenoid valve. The power supply current and power consumption should be selected according to the output capacity. The power supply voltage is generally allowed to be about %. It must be noted that the value is higher during AC starting.
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The British Norgren battery valve is very popular in the world in terms of quality and price. Products with advantages, let me introduce to you the principles of Norgren battery valve selection and model introduction:
1. Select the solenoid valve according to the pipeline parameters: diameter specification (i.e.), interface mode
, determine the diameter () size according to the on-site pipeline inner diameter size or flow requirements.
As for the interface method, flange interface is generally selected, but it can be freely selected according to user needs.
2. Select the solenoid valve according to the fluid parameters: material, temperature group
For corrosive fluids: corrosion-resistant solenoid valves and all-stainless steel edible ultra-clean fluids: food-grade stainless steel solenoid valves should be selected.
High temperature fluid: Choose a solenoid valve made of high temperature resistant electrical materials and sealing materials, and choose a piston structure type.
. Fluid state: ranging from gaseous, liquid or mixed state, especially when the diameter is larger than the order, it must be distinguished.
Fluid viscosity: Usually you can choose between the following values. If it exceeds this value, a high viscosity solenoid valve must be selected.
3. Selection of solenoid valves based on pressure parameters: principles and structural varieties
Nominal pressure: This parameter has the same meaning as other general valves and is determined based on the nominal pressure of the pipeline.
. Working pressure: If the working pressure is low, the direct-acting or step-by-step direct-acting principle must be used. When the minimum working pressure difference is above .
4. Electrical selection: Voltage specifications should be chosen first and more conveniently.
5. Choose according to the length of continuous working time: normally closed, normally open, or continuously energized
When the solenoid valve needs to be open for a long time, and the continuous time exceeds the closed time, the normally open type should be selected .
If the opening time is short or the opening and closing time is not long, choose the normally closed type.
However, for some working conditions used for safety protection, such as furnace and kiln flame monitoring, the normally open type cannot be selected, and the long-term energized type should be selected.
Model types and daily maintenance of Norgren battery valves
() Double combination solenoid valve. This is a combination of solenoid valves of different sizes. The oil metering accuracy of a large number of oil dispensers is as high as .%, and they all use double solenoid valves. The large valve opens, so that refueling is nearly completed in a short period of time, and then the large valve closes, and the small valve supplements to ensure flow accuracy. This technology has been used abroad for many years, and the products are manufactured by world-famous solenoid valve professional companies. By the way, I would like to point out that for the measurement of large flows in domestic oil depots, foreign multi-stage shut-off valves with complex structures and unstable performance are still being introduced or imitated. This product is not manufactured by a world-renowned professional company because the market demand is not large enough to attract their attention. interest. In fact, our oil depot uses domestically produced large-flow double combination valves, which will have much better results. Double combination valves are also commonly used to control parameters such as temperature, pressure, and liquid level. The large valve ensures the basic amount, and the small valve provides the compensation amount. In a system with relatively stable parameters, this kind of position control can achieve very high accuracy. For many systems with large parameter changes, the rate of change is still subject to certain restrictions. For example, temperature control systems are still affected by thermal inertia. Therefore, a properly used double combination valve can significantly reduce the cost compared to a regulating valve while meeting the control requirements.
() Three-position solenoid valve and digital valve: The valve core of the three-position solenoid valve has three working positions. It is usually not powered and is in a slightly open state. The valve provides an initial flow rate to an electrical signal, and the solenoid valve is fully open. Provides large flow to another electrical signal to close the valve. The valve is also equipped with a manual device, so that it does not require power consumption when closing the valve for a long time. The three-position solenoid valve can be regarded as a more compact double solenoid valve. It can easily realize three-position adjustment and has been used in many applications. A further idea is to combine a solenoid valve with a certain proportion of size to form a flow rate. Similar to a digital circuit, this combination valve is called a digital valve. In fact, two double valves or three-position valves of different sizes can produce a certain flow rate, which can achieve very high accuracy. In principle, it has advantages when matched with industrial computers, but since the application field has not yet put forward a large number of demands, this technology is still in the experimental stage.
() Self-retaining solenoid valve: The self-retaining solenoid valve only needs an instant of power to complete the valve switching action, and the valve core position does not require electricity to maintain. Its advantage is that it saves energy, especially when batteries are used as power sources, and does not consider temperature rise, so the coil has a long life and is highly safe in high and low temperature, explosion-proof and other situations. Common ones include mechanical retention and permanent magnet retention, which are divided into double coils and single coils. The single coil magnetic retention structure is the simplest. It changes the polarity of the DC power supply to change the two states of the corresponding valve switch. This kind of solenoid valve needs to add a transfer switch for external wiring of the coil when installed separately, but it is very convenient to be matched with intelligent instruments. The solenoid valves equipped with card prepaid gas meters and water meters are one of the keys to the success or failure of the meters, and the self-holding technology is an important factor in the success or failure of the solenoid valves. Domestic self-holding solenoid valves have become increasingly mature
RR solenoid valves Troubleshooting
The RR solenoid valve does not work after being powered on [] Check whether the power wiring is defective rr Re-wiring and connector connection
Different types of solenoid valves (Zhang) Check whether the power supply voltage is within the working range rr Normal position range
Is the coil desolderedrrre-soldering
Coil short circuitrrReplace the coil
Is the working pressure difference inappropriaterrAdjust the pressure differencerr or replace the appropriate solenoid valve
Fluid temperature If the rr is too high, replace the solenoid valve with a suitable one
There are impurities that make the main valve core and moving iron core of the solenoid valve stuck rr. Clean them. If the seal is damaged, replace the seal and install a filter
The liquid viscosity is too high , the frequency is too high and the service life has expiredrr replace the product
, the solenoid valve cannot be closed
The seal of the main valve core or the iron moving core is damagedrr replace the seal
Are the fluid temperature and viscosity excessive? If the rr is high, replace the corresponding solenoid valve
If impurities enter the solenoid valve core or moving iron core rr, clean it
The spring life has expired or is deformed rr replace it
The orifice balance hole is clogged rr promptly Cleaning
The working frequency is too high or the service life has expiredrrSelect a new product or update the product
Other situations
Internal leakagerr Check whether the seal is damaged and whether the spring is poorly assembled
External leakagerr The connection is loose or the seal is broken. Tighten the screws or replace the seal. There is noise when power is on. The solid parts on the head are loose, tighten them. The voltage fluctuation is not within the allowable range. Adjust the voltage. The core suction surface has impurities or is uneven, please clean or replace it in time
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