**Precautions for Selecting a Solenoid Valve:**
When selecting a solenoid valve, it is crucial to ensure that the fluid in your piping system matches the medium for which the valve was calibrated. This helps prevent corrosion, blockage, or performance issues. Additionally, the temperature of the fluid should not exceed the maximum calibration temperature of the selected valve. Most solenoid valves are designed to handle liquids with viscosity below 20 CST, but if the viscosity is higher than this, special attention and possibly a different type of valve may be required. Another important factor is the pressure difference across the valve. For direct-acting or step-by-step direct-acting types like ZS, 2W, ZQDF, or ZCM series, the maximum pressure difference in the pipeline should generally be less than 0.04 MPa. If the minimum working pressure difference exceeds 0.04 MPa, a pilot-operated solenoid valve is more suitable. Always ensure that the maximum working pressure difference does not exceed the valve's rated maximum pressure. Most solenoid valves operate in one direction, so you should check if there is any backpressure in the system. If necessary, install a check valve to avoid unwanted flow. If the fluid in your system is not clean, it’s recommended to install a filter before the solenoid valve. These valves typically require the medium to be relatively clean to function properly. Pay attention to the flow opening size and nozzle diameter, as these can affect performance. Solenoid valves are usually controlled by a two-position switch, but if maintenance is needed frequently, consider installing a bypass line. In systems where water hammer occurs, adjust the opening and closing time of the valve accordingly—this may require custom settings. Also, keep in mind that ambient temperature can impact the valve’s operation, especially in extreme conditions. The power supply specifications must match the valve’s requirements. Choose a power source that provides sufficient current and power consumption based on the valve’s output capacity. The voltage is generally allowed to fluctuate within ±10%. However, note that AC-powered solenoid valves may have a higher VA value during startup, which could influence your electrical design. Solenoid valves come in two main reliability types: normally closed (NC) and normally open (NO). NC valves are most commonly used, as they remain closed when power is off and open when powered. However, if the valve needs to stay open for long periods, a NO valve might be more appropriate. When the operating frequency is high, a direct-acting type is often preferred, especially for larger diameters. Finally, while life testing is common during factory testing, there is currently no official standard for solenoid valves in China. Therefore, it’s essential to choose a reputable manufacturer with a proven track record. Always consider the valve’s response time, as faster action is critical in certain applications.
Hexagon Socket Countersunk Head Bolts
The hexagon socket countersunk bolts are also called flat cup hexagon socket bolts. They are generally made of English and metric systems, and are often made of stainless steel and carbon steel. The outer edge of the Screw head is round, and the middle is a concave hexagon. Its head is a 90-degree cone. After assembly, the screw head can fall into the assembly surface to keep the assembly surface neat. Countersunk hexagon socket bolts are often used on mechanical equipment, which are mainly beneficial to fastening, disassembling, and not easy to slip.
Hexagon Socket Countersunk Head Bolts,Hex Socket Countersunk Head Screw,Socket Head Cap Scre,Countersunk Head Bolt
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