Flowserve Valtek Mark 10 Survivor Control Valves - Manual (Page 13)

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Valtek Mark 10 Survivor Control Valves FCD VLENIM0036-05 – 07/09
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4.8. Ensure all accessories, brackets and bolting are securely fastened.
4.9. If possible, remove the air supply and observe the actuator for correct fail-safe action.
4.10. Spray a soap solution around the cylinder actuator retaining ring, adjusting screw and
actuator stem guide to check for air leaks through the O-rings.
4.11. Clean any dirt or foreign material from the plug stem.
4.12. If an air filter is supplied, check and replace the cartridge if necessary.