SKC 320 User Manual

Operating Instructions

Maintenance

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863 Valley View Road, Eighty Four, PA 15330 USA

Field Rotameters

This rotameter is packed to protect against damage during shipment. If damage
occurs, notify the carrier immediately. Also, check that you have received the
correct model and fl ow range required for your application.

Calibration

SKC rotameters are secondary standards and should be calibrated by the user
with a primary standard calibrator at regular intervals. Since rotameters are
aff ected by temperature and atmospheric pressure, rotameter calibration should
be performed under the conditions of use or a mathematical correction should
be used.

Operation

Operate the rotameter in a vertical position to assure accuracy. Use it in a manner that
minimizes vibration and fl ow pulsation; both conditions may aff ect the rotameter.

Flow rate is indicated by the point on the printed scale at which the center of the ball
fl oat comes to rest. The fi eld rotameter inlet must always be at atmospheric pressure
(i.e., exposed to the atmosphere). The rotameter is the last device connected to the
sampling train. Connect the inlet of the sampling pump to the outlet of the sampling
medium. Connect the inlet of the sampling medium to the outlet of the rotameter.

Occasionally clean the rotameter if dirt appears in it or if fl oat movement is
restricted. To clean:

1. Remove the top plug, fl oat stop, and ball fl oat.

2. Wash the tapered hole, ball fl oat, fl oat stop, and top plug with a mild

3. Reinstall the ball fl oat, fl oat stop, and top plug. Use a small amount of

liquid detergent and a so brush. Rinse all parts with clean water and
dry thoroughly. Avoid using solvents.

halocarbon grease or any other compatible O-ring lubricant to ease
installation of the top plug and prolong O-ring life.

Specifi cations

Meas. Range
(L/min)

0.05-0.5 2 5% 0.02 320-2A05

0.1-1.0◊ 4 3% 20 320-4A1

0.4-5.0 4 3% 0.1 320-4A5
2-20 4 3% 0.5 320-4A20L
4-50 4 3% 1.0 320-440
3-30 4 3% 1.0 320-530**
3-30 4 3% 1.0 320-100†

Scale
(inch)

Accuracy*±Subdivisions

(L/min)

Cat. No.

* Full Scale

◊ Product scale is marked in ccm (cc/min), which is equivalent to ml/min.

** Fittings adapted for use with HV30 Sample Pump

† Fittings adapted for use with QuickTake Sample Pumps

Float: Black glass or stainless steel ball

Body: Clear acrylic

Seals: Buna N O-ring

Pressure: 100 psig maximum

CAUTION

This rotameter is designed for use with non-hazardous gases at

pressures up to 100 psig and temperatures up to 65 C (150 F).

Do not use hazardous gases or liquids and do not exceed

temperature or pressure limits. Use with hazardous fl uids or

beyond pressure and temperature limits may cause failure,

which could result in personal injury.

Temperature: 150 F (65 C) maximum

Fittings: Brass with hose connector, Tygon® tubing, and

Luer taper adapter

SKC Limited Warranty and Return Policy

SKC products are subject to the SKC Limited Warranty and Return Policy, which
provides SKC’s sole liability and the buyer’s exclusive remedy. To view the com­plete SKC Limited Warranty and Return Policy, go to h p://www.skcinc.com/
warranty.asp.

Form 37505 Rev 1208