Brooks-instrument FC8744 NRS Manuel d'utilisateur télécharger pdf (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

(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

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.

1 2 3 4 5 6 7 8 9 10 11 12 ... 47 48

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Brooks-instrument FC8744 NRS Manuel d'utilisateur Page 7