Brooks Instrument FC8744 NRS - Manual (Page 7)

1-1
Section 1 Introduction Installation and Operation Manual
X-VA-FC-eng
Part Number: 541B045AAG
August, 2012
Flow Controllers for Gas and Liquid Service
1-1 Description
Brooks ® flow controllers are designed to maintain a constant differential
pressure across an integral, manual flow regulating valve. The incoming
fluid pressure on one side of the diaphragm, and outlet pressure plus
spring action on the other side, position an internal diaphragm-actuated
control valve. Variations in the supply or discharge pressure disturb the
balance of forces on the diaphragm, causing the internal control valve to
open or close, thus maintaining a fixed differential pressure across the
integral, manual flow regulating valve resulting in constant flow.
Refer to Figure 1-1.
Model FC 8744 controllers are used for accurately adjusting and
maintaining small gas and liquid flows with variable downstream pressures.
Series FC 8800 controllers are used for accurately adjusting and
maintaining liquid and gas flows with variable upstream pressures.
Series FC 8900 controllers are used for accurately adjusting and
maintaining liquid and gas flows with variable downstream pressures.
1-2 Design Features
• Wide range of models for high and low flow rates.
• Integral Controller with flowmeter assemblies in a compact size.
• Brass or 316 Stainless Steel construction compatible with a wide range
of fluids.
• Front or Rear Panel Mounting options.
• 15 Turn NRS TM (extremely low flow) valve option for more precise
control.
1-3 Specifications
Flow Ranges
Water - up to 480 GPH / 1820 l/h
Air - up to 2130 SCFH / 56000 l
n
/h
Refer to Table 1-1.
Pressure and Temperature Ratings
Up to 1000 psig / 69 bar.
Refer to Table 1-2a or 1-2b.
Minimum Operating Temperature: -40°F/C.
Maximum Operating Temperature: Refer to Tables 2a or 2b.