JEON DG Series, Manual, Page: 2 / 32

DG Series Regulators
2
!
WARNING
Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Overpressure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6. Operating of Pressure Reducing Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7. Operating of Backpressure Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9. Pressure Reducing Regulator Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10. Backpressure Regulator Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11. Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
12. Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion, fire
and/or chemical contamination causing property damage and personal injury or death. Regulators must be installed,
operated and maintained in accordance with federal, state and local codes, rules and regulations and Emerson Process
Management Regulator Technologies Inc. (Emerson) instructions. If the regulator discharges process fluid or a leak
develops in the system, service to the unit may be required. Failure to correct trouble could result in a hazardous
condition. Call a qualified service person to service the unit. Installation, operation and maintenance procedures
performed by unqualified person may result in improper adjustment and unsafe operation. Either condition may result
in equipment damage or personal injury. Only a qualified person must install or service the DG Series regulator.