A high-pressure solenoid valve is selected by matching its maximum working pressure and the system's minimum differential pressure to the medium and temperature. Direct-acting valves open from zero pressure for small ports, while pilot-operated valves handle larger flows but need a minimum pressure drop. Confirm body and seal materials, the pressure/temperature rating, voltage and port size, and choose normally-open or normally-closed before ordering.
Direct-acting or pilot-operated
The two main constructions behave differently. A direct-acting valve opens with the coil alone and works from zero pressure drop, which suits small ports and small flows. A pilot-operated valve uses the medium's own pressure to open a larger main orifice and handles bigger flows, but it needs a minimum pressure drop. If the system pressure can fall below that differential, a pilot valve may not open, so confirm the minimum differential pressure for your line.
Reading the pressure rating correctly
Manufacturers list pressure in MPa, bar or psi, and the figure usually refers to the maximum working pressure for a given medium and temperature at the port. Look for both the working pressure and the proof or burst pressure, which is much higher and is not a normal operating limit. In a cycling service the pressure range matters as much as the maximum.
Seal and body materials
Seal choice drives compatibility. Common options include NBR (nitrile) for cool air, water and oil; EPDM for hot water; FKM/Viton for oils and many chemicals; and PTFE for aggressive media. Brass is economical for clean water and air, while stainless steel is a common choice for corrosive media and higher pressures.
Pressure and temperature together
A valve's pressure rating depends on temperature. As the temperature rises, the safe working pressure of the body and seat generally drops. Check the combined pressure/temperature rating from the manufacturer's data for a hot, pressurized medium.
Selection checklist
Confirm the maximum working pressure, differential pressure, medium, temperature, body material, seal material, flow/Cv, voltage and port size before ordering.
Frequently Asked Questions
- FAQ What pressure can a high-pressure solenoid valve handle?
The rating depends on the model, the medium and the temperature. A solenoid valve is normally rated for a stated maximum working pressure for a given medium and temperature, and that figure should exceed the system's peak pressure. For high-pressure service, confirm the combined pressure/temperature rating and whether a direct-acting or pilot-operated construction matches your minimum differential pressure. Verify the exact number with the manufacturer before ordering. - FAQ Can Kailing build a custom high-pressure solenoid valve?
Yes. Ningbo Kailing Pneumatic (KLQD) manufactures solenoid valves in its 2W and 2WB series and supports OEM/ODM programs built to your drawing. Share the medium, maximum working pressure, differential pressure, temperature, voltage, port size, material and quantity, and a sales engineer will confirm the matching series and seal options for your conditions.
Need a quotation?
Send the page link, quantity, drawings and working conditions to Kailing for review.