SUN Hydraulics date codes
SUN Hydraulics uses date codes on their cartridge valves to track the exact manufacturing date. In the attached document, the date key is explained. SUN Hydraulics date codes from 1986…

Hydnet introduces SUN’s new 2-way direct-acting solenoid valve for common cavity: DTTA. The valve has a maximum pressure rating of 250 bar and is well suited for applications such as street sweepers, agricultural attachments, and construction equipment.
DTTA features a pressure-balanced design, providing consistent flow regardless of pressure, along with low leakage. The valve is normally open and available with both L- and X-control options.