ASCO 304-089 Rebuild Kit 30067439-890 this is an atmospheric type

this is an atmospheric type vacuum breaker

pre-packaged solution for 120VAC applications requiring 20 Amp SPST control

Is there a difference between the 393690-4 and the 393690-4/U model

50VA Power Rating: Provides sufficient volt-ampere capacity to handle high-inrush currents from multiple inductive loads

ASCO 304-089 Rebuild Kit 30067439-890 this is an atmospheric typeThe ASCO 304 089 Rebuild Kit is a comprehensive maintenance solution engineered specifically for ASCO 8344 4 way solenoid valves. This factory authorized kit is essential for restoring the integrity of 3 8 inch NPT pilot operated valves used in demanding pneumatic and hydraulic control circuits. Designed to handle AC voltage configurations, the kit includes precision machined internal components such as high grade NBR (Nitrile) diaphragms and O rings,