These are replacement stainless steel buffer springs compatible with Parker Series 9 pulse valves and Ideal Vacuum High-Speed Pulsed Solenoid Valves. The buffer spring assists with valve armature alignment and performance tuning. If the buffer spring becomes corroded, brittle, or broken, due to long-term use or chemical exposure the valve will perform eratically or fail to open when energized.

See drawing below for spring replacement location.