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Simple Regulator Troubleshooting Problem Problem cause Remedy General Purpose Regulator Regulator creep (increase in Dirty or cut valve elastomers. Replace or clean valve. If body Knob secondary pressure due to leak Nick in valve seat. or valve seat is damaged it can from primary) be replaced on some models. Adjusting screw On others replacement of Adjusting nut complete regulator is required. Control spring If this feature is required, Diaphragm Spring Won't relieve secondary pressure Non-relieving diaphragm replace with relieving type rest assembly. diaphragm assembly. Valve pin Valve Won't reach desired pressure Use regulating spring with Relief Regulating spring with low spring rate designed to cover Valve spring seat spring rate. desired range. Bottom plug Excessive leak from relief hole Replace diaphragm assembly. Damaged relief seat. Ruptured diaphragm. Replace or clean valve. Leakage past valve causing secondary to increase some- what and open relief seat. Regulator chatter A resonant condition is Replace spring with a higher generally pressure range spring. only encountered under a certain set of conditions of flow Replace with a piston type and pressure and then only in regulator since they have less some applications in which tendency to chatter. regulator couples with other system components. Regulator difficult to adjust Adjusting screw or knob locking Pull to unlock knob and adjust; device in locked position. push knob to lock. Threaded adjusting screws: loosen lock nut, remove adjusting screw, clean thread and lubricate. Contaminants in adjusting screw threads. Place some lubricant on tip of screw. DPL108 533 pages518-554.pmd 533 10/5/2007, 10:29 AM
Goodyear Rubber Products
