Imported Solenoid Valves: How to Select Them for Lithium Battery Production?

Where Can Imported Solenoid Valves Be Used?

Imported solenoid valves can control compressed air, nitrogen purging, and cooling-water lines in lithium battery production. The right choice depends on the fluid, pressure difference, seal materials, and switching needs. Start with the control task before choosing the valve size and type.

U.S.KNKE application planning can link valve selection with flow measurement, pressure checks, and machine controls. A battery cell assembly workshop, for example, may need separate valves for air purging and cooling water. Although both tasks need on/off control, their valve and seal requirements differ.

Standard on/off valves do not replace valves designed for steady flow adjustment. Electrolytes and liquids that contain solvents need separate checks for material compatibility, cleanliness, and hazardous-area use. The figures below explain design choices. They do not represent U.S.KNKE product ratings or actual operating results.

1. How Does Pressure Difference Affect Imported Solenoid Valves?

Supply pressure alone does not show whether a valve will work correctly. Some pilot-operated valves need a minimum pressure difference between the inlet and outlet. Direct-acting models can work at zero pressure difference within their stated limits.

Consider an air line with an inlet pressure of 0.6 MPa and an outlet pressure of 0.55 MPa. This gives a pressure difference of just 0.05 MPa. Despite the higher supply pressure, the chosen valve must support that small difference.

Startup conditions also need attention. As air fills the equipment, the pressure on each side may become nearly equal. A sound selection review covers this stage as well as normal use.

• Check both pressures: Record inlet and outlet values during startup, normal use, and shutdown.
• Review flow capacity: Use the required airflow and allowed pressure drop rather than pipe size alone.
• Choose the power-off state: Decide whether the process needs a normally closed or normally open valve.

Shutting off the supply does not release air trapped downstream. Equipment that needs pressure release must have a suitable vent path and control sequence.

2. How Should You Select a Valve for Cooling Water?

Use the required water flow and allowed pressure drop to check valve capacity. Then assess how closing may affect the pipes. An imported solenoid valve can switch cooling water with auxiliary equipment, but matching the pipe connection does not ensure enough flow.

For clean water near room temperature, assume a flow of 2 m³/h and an allowed valve pressure drop of 0.1 bar. A standard water-flow calculation gives a required Kv of about 6.3. Kv describes the valve’s flow capacity.

This figure helps narrow the choice. Final checks must cover the model’s flow data, working pressure difference, and pressure rating. Valves with the same connection size can have different internal openings and flow capacities.

Fast closing may cause a pressure surge. Long pipes, higher water speeds, and frequent switching need closer review. Depending on the system, possible measures include slower closing, a revised control sequence, or suitable surge-control devices.

Water flow, temperature change, and machine load all affect cooling. An open command alone does not prove that the equipment receives enough cooling water.

3. What Should You Check for Quality, Delivery, and Service?

Compare imported solenoid valves through clear technical records and confirmed installation details. Check the body and seal materials against the fluid. Other key points include temperature limits, working pressure difference, coil voltage, and how long the coil may stay powered.

Coil choice also affects the power supply. A 24 V DC coil rated at 8 W draws about 0.33 A at its rated operating point. Twelve such coils powered at once have a total rated power of 96 W.

Power-supply sizing must also account for startup needs, control output limits, and voltage loss along the cables. These figures are examples, not ratings for a specific U.S.KNKE model.

• Quality records: Confirm fluid-contact materials, seals, coil ratings, and relevant inspection documents.
• Delivery planning: Agree on thread types, flow direction, plugs, and installation space early.
• Service preparation: Link valve models and equipment tags to operating data and fault records.

According to the supplied brand information, KNKE Industry (Shenzhen) Co., Ltd. handles Asia-Pacific sales and service. Project documents should state the support arrangements and delivery conditions. Clear fault reports also help technical staff assess problems.

What Should You Do Next?

Gather the operating data, define the control sequence, and check the chosen model against both. Useful details include the fluid, temperature, inlet and outlet pressures, required flow, switching rate, and supply voltage.

Gas lines also need filtration and drainage checks. Cooling-water records should describe water quality and pressure changes. Solvent service requires a review of material compatibility and hazardous-area needs.

Next, define each valve’s normal state, power-off state, and alarm conditions. A standard coil does not necessarily report the valve’s position. Where the process needs proof of actual operation, consider position feedback or downstream pressure and flow checks.

Finally, match the U.S.KNKE model documents with the installation drawings, wiring guide, and service records. Each valve should have a clear task. Each control signal should trigger a defined action, giving the team a practical basis for installation, startup checks, and fault finding.