Our customer is a glass bottle manufacturer who was looking to improve his machine performance and resolve the known issues relating to traditional 21 line blocks with cartridge valve technology. This solution has changed very little in the decades that it has been in use. The solenoid pilots are extremely sensitive to pressure variation and contamination resulting ultimately in valve failure but most commonly as a speed of response degradation. This reduction in speed means that the mechanism is unable to keep time through the 360 degree cycle.
The exposed wires and terminals of the original block design made it susceptible to contamination by from the oil, water, steam or other liquids in the environment resulting in electrical faults and valve coil failure.