The pneumatic propulsion control system used on your vessel uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper technique? Illustration MO-0052
• Material compatibility of rubber diaphragms with different cleaning agents • How non-flammable solvent affects metal parts like valve discs and seats • Why keeping sealing surfaces clean and undamaged is critical to proper valve operation
• For rubber components such as the diaphragm, which type of cleaner is least likely to dry, crack, or swell the rubber over time? • For metal sealing surfaces that may have oil, varnish, or fine particulate on them, which cleaner is more effective at removing contamination without leaving residue? • If you used the wrong cleaner on the rubber diaphragm, what failure modes could that create in this pneumatic relay valve?
• Confirm which cleaner is gentlest and safest for rubber parts long term • Confirm which cleaner is best at cutting oil and deposits on metal valve discs and seats • Make sure the chosen method does not introduce residue that could interfere with sealing or valve movement
No comments yet
Be the first to share your thoughts!