The JAKSA D305 is a direct-operated 3-way solenoid valve from German manufacturer JAKSA, configured normally closed with a brass body and stainless steel internal parts. Its direct-acting mechanism requires zero minimum pressure differential — the valve opens purely on solenoid force, making it suitable for low-pressure and gravity-feed water circuits where pilot-operated valves stall. The 0–10 bar range, 10–20 ms response, and 1,000 cycles/minute rating make it suitable for dosing, diverting, and fast-cycling pneumatic pilot circuits.

Which seal material should I choose for water service?

JAKSA offers three seal options. EPDM is the standard recommendation for water and hot water up to 130 °C — it resists swelling and degradation in aqueous service. FPM (Viton) is preferred when the water stream contains chemical additives, solvents, or traces of hydrocarbons. NBR is best suited for compressed air and oil media. For potable water, verify EPDM compliance with local drinking-water regulations.

What installation practices ensure long-term reliability?

The IP65 rating relies on a properly fitted ISO 4400 / ISO 6952 plug connector. In humid or outdoor environments, JAKSA recommends replacing the standard plug with a sealed cable gland to prevent moisture ingress through the connector interface. The valve can be mounted in any orientation without affecting performance, but a 50-micron upstream filter is recommended to protect the 3.2 mm orifice from particulate clogging.