FCR - flow control regulators are double diaphragm spring balanced flow ratio control regulators that offer maximum control and fuel efficiency on gas-fired applications involving pre-heated air to the burners, or where burners fire against a varying back pressure. The FCR monitors air mass flow by means of a pressure differential across a POP orifice flow meter. The signal from the POP is applied across the regulator large top diaphragm; pressure differential automatically compensates for back pressure. Lower matching "gas" diaphragm is connected to suit the application. Three smaller diaphragms are used within regulator to balance out dynamic and static forces in control system. The FCR holds a constant air/fuel ratio from cold start-up through hot air application. All control components are on the cold side of the system and are unaffected by high combustion air temperatures, minimizing cost and maintenance.
APPLICATIONS
- Air and gas flow control in pre-heated air systems (FCR).
- Piloting of zero regulators in pre-heated air systems (FCR-PC).
- Systems with varying pressure combustion chambers.
FEATURES
- Body and valve seat: cast iron G20
- Valve seat: AISI 303
- Valve stem: AISI 303
- Diaphragms: nitrile rubber/nylon
- Max. operating pressure: 140 mbar
- Max. differential pressure: 36 mbar
- Max. operating temperature: 65°C
- Turndown range: 10:1
- Max. air signal: 36 mbar
- Nominal air signal: 25 mbar
- Min. air signal: 0.25 mbar
- Accuracy: low flow: +0.0/-0.1 mbar full flow: + 0.0/-1.0 mbar
VAN GIẢM ÁP FCR-REGDownload