How do you choose to import an electromagnetic valve -- which one's good -- german leeds is good
The german lit electromagnetic valve type should follow the four principles of safety, reliability, applicability, economicity and six field conditions (i. E. Diameter size, type of medium, pressure level, power voltage, mode of action, special function) in order。
I. Electromagnetic valves selected according to the type of medium: valve material, sealed material, temperature group
Corrosive fluids: valves are suitable for stainless steel or ptfe (pyro-tetrafluoroethylene, commonly known as the plastic king) and for fluorine rubber or ptfe sealing material。
2. Food or super-purified fluids: valves are suitable for sanitary stainless steel and for silicon rubber sealing materials。
High-temperature fluids: the electromagnetic valves made of high-temperature-resistant electrical and sealed materials are selected, and the piston structure is selected。
4. Fluid state: large to gaseous, liquid or mixed state, especially when the calibre is greater than 25, must be distinguished as it relates to conductor parameters。
5 fluid viscosity: is generally optional below 50 cst and, if this value is exceeded, the high viscosity electromagnetic valve is selected。
Fluid cleaning: filters are installed in front of electromagnetic valves to select other structures when the medium contains impurities。
Ii: select the electromagnetic valve according to the pressure level: the principle structure type
When an electromagnetic valve takes a long time to start and lasts for much longer than the time of the shutdown, it is advisable to opt for a stand-alone type。
2. Select the permanent closed type if the switch and switch are to be switched or opened for a short or similar period of time。
3 however, there are some tasks for safety protection, such as fire monitoring of kilns, gas leak alerts, fire safety connection systems, which should be chosen to cut the electromagnetic valves on an emergency basis (long-term powering is only a relative concept), let alone open-ended。
4. Emps (also referred to as dual-stable) are new technologies that are used mainly in situations requiring energy savings or low voltage drivers。
Iii: main characteristics of electromagnetic valves:
(1) leaks are blocked, leaks are easy to control and use safely. Internal and external leakage is a security risk factor. Other self-controlled valves typically extend the valve poles and are controlled by electric, aerodynamic, liquid-implementing agencies for the movement or movement of the core of the valve. This addresses the problem of long-term movement valves being sealed out; only the electromagnetic valves are performed with electromagnetic force on sealed steel cores, without motion seals, and leaks are easily blocked. Electric valve rectangular control is not easy, creating internal leakages and even pulling off the head of the valve pole; the structural control of the electromagnetic valve is leaking until zero. Therefore, electromagnetic valves are used in a particularly safe manner, especially for corrosive, toxic or high temperature media。
(2) the system is simple and it is connected to a computer at a reasonable price. The electromagnetic valves themselves are simple in structure and low in price, and are easier to install and maintain than other types of implementers such as the regulating valves. More significantly, self-control systems are made up of much simpler and lower prices. Since the electromagnetic valve is a switch signal control, it is easy to connect to a manual control computer. The advantages of electromagnetic valves are even more evident in an era of widespread computer penetration and sharp price declines。
(3) action delivery, small power and light shape. Emp response times can be as short as a few milliseconds, and even a lead electromagnetic valve can be contained in tens of milliseconds. It's more sensitive than any other self-control because it's self-directed. Properly designed electromagnetic valves have low power consumption and are energy-efficient products; they can also be used only to trigger action, automatically maintain the valve level and normally do not consume electricity at all. The size of the electromagnetic valve is small, saving space and lightweight beauty。
(4) control precision is limited and the applicable medium is restricted. Electromagnetic valves are usually in only two states, with cores at only two limits, which cannot be continuously reconciled, and the precision of the adjustments is limited (which are many new ideas that try to break, but are all at trial stage)。
Electromagnetic valves have higher requirements for the purity of the medium, which cannot be applied in granular form and, in the case of impurities, must be filtered first. In addition, the viscous media are not applicable and the medium viscities applicable to specific products are relatively narrow。
(5) models are diverse and widely used. Electromagnetic valves are designed to produce a wide variety of products that meet a wide variety of needs and uses, despite their birth defects and their outstanding advantages. Advances in electromagnetic valve technology also revolve around how to overcome congenital deficiencies and how to better exploit inherent advantages。
Iv: selection of assistive functions according to environmental requirements: blast protection, back-up, manual, water fog, canopy, dive
Flammable, explosive-prone environment: the appropriate level of blast-resistant electromagnetic valve must be selected (my company currently: lfog-f1-e)
2. When a piping medium is inverted, we select our lfc series electromagnetic valves。
3. When there is a need for on-site manual operation of the electromagnetic valves, we select the manual electromagnetic valves of our company lfoh series。
4. Waterproofing and dust-proofing varieties (protective classes above ip45) should be selected for open-air installation or dust multiple locations. For use in fountains or underwater pipelines, a diving electromagnetic valve (protective level above ip68) shall be used。
V: selection based on i, the selection of electromagnetic valves based on pipe parameters: diameter specifications (i. E. Dn), interface mode (connectivity mode)
1. The diameter (dn) dimensions are determined by the size of the in situ pipeline or by the flow requirements。
2. Interface mode, general dn>65 to choose the french interface, and dn≤65 to choose the screw and the french formula according to user needs
Note: any company that orders my company's products is entitled to free technical guidance and commissioning. The product is guaranteed for one year, and the order must be made: please know as much as possible about the product’s calibre, pressure, use of media and conditions of work, so that our company can provide more accurate and targeted services。
Chinese-level agent for the german litter valve business
Beijing's all-sung fai valves ltd
