This series of products is an electromagnetically controlled industrial device that is an automated base component for controlling fluids. Used in industrial control systems to adjust the direction, flow, speed and other parameters of the media. The solenoid valve can be used with different circuits to achieve the desired control, while the precision and flexibility of the control can be guaranteed. Widely used in landscape fountains, ship heavy industry, petrochemical, water supply and drainage, cleaning equipment, water plants, pipeline media automation control, fire protection and automatic sprinkler system control.
Second, the main technical parameters:
Product Name: Stainless steel fire solenoid valve
Product model: XYXF
Size: DN1-1100mm
Principle structure: Piston type. Diaphragm type
Control method: normally open, normally closed, self-maintaining
Body material: cast steel, stainless steel 304, 316
Spool material: stainless steel 304
Pressure range: 0~200Mpa
Temperature range: (--200, -100, -50) ~ (+120, +200, +250+350) °C
Working environment temperature: -10-+50°C -40-+80°C
Coil operating temperature: <+50°C, <+85°C
Applicable medium: gas, water, oil, steam, gas, corrosive fluid
Power supply voltage: DC12, DC24V, DC36V, DC110V, DC127V, DC220V, DC380V;
AC24V, AC36, AC110V, AC127V, AC220V, AC380V
Wiring method: Terminal Block type, lead type, plug type
Medium viscosity: less than 50CSt (customized when more than 50)
Connection method: flange, internal thread, external thread, ferrule
Leakage: Zero
Remarks: Special type can be customized
Third, the working principle:
Normally closed type: When the coil is energized, the pilot spool is closed, the pilot hole is opened, the upper chamber of the valve is relieved, the piston is pushed by the medium pressure of the lower chamber, and the solenoid valve is opened; when the coil is de-energized, the pilot spool is reset by the spring. The pilot hole is closed, the upper chamber of the valve is pressurized by the piston orifice and the thrust of the return spring, and the solenoid valve is closed.
Normally open type: When the coil is energized, the pilot hole is closed, the upper chamber of the valve is pressurized by the piston orifice and the thrust of the return spring, and the solenoid valve is closed. When the coil is de-energized, the pilot spool is reset by the spring, the pilot hole is opened, the upper chamber of the valve is relieved, the piston is pushed by the medium pressure of the lower chamber, and the solenoid valve is opened.
note:
1. Pilot-operated piston solenoid valve requires that the medium passing through the solenoid valve must have pressure (the medium has no pressure and is not suitable for this valve). The solenoid valve on our side is to ensure that the medium has a pressure of 0.1 kg to work properly.
2. There are two sources of force for opening the main piston of the pilot piston solenoid valve. One is the magnetic force generated after energization, and the second is the pressure pushing of the medium.
These two forces must exist at the same time to ensure the normal operation of the pilot piston solenoid valve.
Small computer system interface (SCSI) is an independent processor standard for system level interfaces between computers and intelligent devices (hard disks, floppy drives, optical drives, printers, scanners, etc.). SCSI is an intelligent universal interface standard.
In addition to SCSI, IDE is also a very common interface. From the point of view of ease of use, IDE is more suitable for ordinary users. In addition, personal computer users not only need to configure a few peripherals, but also do not require high speed. Therefore, it is more appropriate to choose IDE interface. In addition, IDE also has the characteristics of high performance price ratio and wide application. Although the SCSI interface has many incomparable characteristics, the price of the interface and its peripherals is too expensive to be borne by ordinary users, which determines the limitation of its actual use range.
1. The working mode of IDE requires the whole process participation of CPU. When the CPU reads and writes data, it can't perform other operations. In this case, in the multitask operating system of Windows 95 / NT, the system reaction will be greatly slowed down. The SCSI interface controls the data reading and writing operation completely through the independent high-speed SCSI card, so the CPU does not have to waste time to wait, which obviously can improve the overall performance of the system. However, IDE interface has also made great improvements to improve this problem. DMA mode can be used instead of PIO mode to read and write data. DMA channel is responsible for data exchange, which greatly reduces the CPU consumption. However, comparing the CPU utilization of SCSI and IDE, we can find that SCSI still has considerable advantages.
2. The scalability of SCSI is larger than that of IDE. Generally, each ide system can have two IDE channels, with a total of four IDE devices. The SCSI interface can connect 7-15 devices, much more than IDE, and the cable connected is far longer than ide.
3. Although the price of SCSI device is higher, compared with IDE, the performance of SCSI is more stable, durable and reliable.
SCSI Solder Type Section
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