GILMONT ACCUCAL FLOWMETERS - Cole-Parmer

OPERATING MANUAL

GILMONT? ACCUCAL? FLOWMETERS

28W092 Commercial Ave. Barrington, IL U.S.A. 60010-2392

(847) 381-4888 (847) 381-7053 (Fax)

800-962-7142 e-mail: barnant@

A-1299-0766 Edition 01

TEFLON- Reg TM E.I. DuPont de Nemours, Inc. Trademarks bearing the ? symbol in this publication are registered in the U.S. and in other countries.

DESCRIPTION

Variable area Flowmeters (rotameters) are used to measure the flow rate of liquids and gases in a variety of laboratory and industrial applications. These meters consist of a spherical float moving vertically in a glass flowtube with a tapered inside diameter. As the flow through the flowtube increases, the float rises in the flowtube. A scale marked on the flowtube (along with calibration charts and correction factors for fluid density, temperature and pressure) is used to obtain accurate measurements of flow rate.

These Flowmeters contain the following features:

? Correlated and direct reading all in one easy to read meter. ? Accuracy as good as ? 2% of reading. Also available with NIST-

traceable calibration ?1% of reading accuracy at calibrated points. ? Rugged construction--ideal for industrial and laboratory use. ? Stainless steel, PCTFE or PTFE and glass wetted parts. ? Interchangeable dual, direct reading scales. ? Available with or without 14 turn precision valve.

Two scale cards are supplied for direct reading of air and water under standard operating conditions (70? F, 1 ATM) and a blank scale is supplied for use with the correlated scale of the meter. These scales are installed over the process connections at the back of the Flowmeter and held in place by the two palnuts (see Figure 2).

An additional float made of stainless steel is supplied with each Flowmeter. This float can be used in place of the black glass float installed in the Flowmeter to extend the range of the Flowmeter by approximately 1.75 times for air and 2.12 times for water.

UNPACKING

Carefully unpack and check contents. If any components are missing or damaged, save the packing list and material and advise the carrier of the discrepancy.

ACCESSORIES

Flowmeter Stand Kit. Includes one base, one rod and two mounting clamps

Flowmeter Base Rod, 18 in L Mounting Clamp, includes wood screws

GF-4004

GF-4001 GF-4002 GF-4003

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INSTALLATION

1. Unpack the Flowmeter and retain all packing material until proper product operation has been verified.

NOTE: If used for vacuum applications or when back pressure compensation is required (as in gas blending), the metering valve must be positioned at the outlet (top of the Flowmeter) by inverting the frame assembly in relation to the flowtube assembly.

NOTE: Meters are supplied with the 0-100 scale divisions on the flowtube set up for use with the printed tables. If direct reading scales are to be used, see the instructions at the back of the manual.

2. Before installing, open valve of the Flowmeter (if equipped) and check that the float moves freely in the flowtube. In some cases, floats may appear sluggish or do not move due to condensation resulting from temperature changes during shipping. It is advisable in such cases to blow a dry clean gas through the meter until the float is freed.

3. Leave the Flowmeter valve partly open during installation (it is shipped in the partly open position).

4. It is important that all lines to be connected to the Flowmeter are purged of any dust or other residual contamination prior to installing the meter.

NOTE: In some applications a particulate filter should be installed at the inlet of the Flowmeter. Select a suitable filter for the particulate matter to be removed.

5. Isolation or shut-off valves should be installed in the system to permit removal of the meter for cleaning or servicing.

6. Mounting:

a. The meter must be mounted in a vertical position. A deviation of 5 degrees or more from vertical will affect the accuracy of the meter.

b. Connectors on the meter are supplied with wrench flats which must be held firmly when threading mating connectors, to prevent loosening of the connectors.

c. Paste sealants are generally preferred. However, applications which are sensitive to contamination and require inert sealants, TEFLON? PTFE tape is recommended.

CAUTION:

Care must be taken to avoid shredding of TEFLON PTFE tape which can foul meter operation.

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7. Base Mounting: Secure the Flowmeter to the base by means of a 1/4 in-20 screw threaded in the hole in the bottom block. (See ACCESSORIES for Flowmeter Base model number GF-4001.)

Panel Mounting: Locate mounting holes per Figure 1. Secure the Flowmeter to the panel by means of nuts threaded over the inlet and outlet fittings. Hold the fittings across the flats with an open end wrench when removing the nuts so that the O-ring seal remains tight.

8. Be sure that the piping is adequately supported to prevent undue strain on the Flowmeter.

WARNING:

A leak test must be performed when hazardous fluids are involved. Perform the leak test using a non-hazardous fluid. Start with a low pressure and gradually increase.

FIGURE 1--MOUNTING DIMENSIONS

FLOWMETER

DIMENSIONS-INCHES (mm)

A

B

C

D

E

F

G

H

65 mm scale

5.65 in 0.60 in 4.50 in 1/8-27 0.78 in 1.00 in 1.75 in 1.25 in

(All Flowtubes) (143.5 mm) (15.2 mm) (114.3 mm) NPT (19.8 mm) (25.4 mm) (44.5 mm) (31.8 mm)

150 mm scale 10.02 in 0.60 in 8.81 in 1/8-27 0.78 in 1.00 in 1.75 in 1.25 in (200-235 Flowtubes)(254.5 mm)(15.2 mm) (223.8 mm) NPT (19.8 mm) (25.4 mm) (44.5 mm) (31.8 mm)

150 mm scale 12.64 in 0.79 in 11.00 in 1/4-18 0.95 in 1.50 in 2.13 in 1.75 in (240-250 Flowtubes)(321.1 mm)(20.1 mm) (279.4 mm) NPT (24.1 mm) (38.1 mm) (54.1 mm) (44.5 mm)

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