Table of Contents
Advertisement
Operation
Operation
Operation
Operation
To reduce the risk of serious injury, including cuts,
amputation of fingers by the agitator blades, and
splashing in the eyes or on the skin, always power
off and disconnect power to the VFD before raising,
checking, or repairing the agitator.
Equipment surfaces and fluid that is heated can
become very hot during operation, resulting in
severe burns. To avoid severe burns do not touch
hot fluid or equipment.
General Operation
General
General
Operation
Operation
Use the VFD to start, stop, and adjust the agitator
speed. See the VFD manufacturer's manual for
operating information. For a Graco supplied VFD,
see manual 3A4793 for operating information.
Agitators are used to maintain solids in suspension.
If solids have settled in the container, use a shaker
or some other device to bring product back in
suspension before installing and operating the
agitator.
Activate the agitator to mix fluid thoroughly before
supplying fluid to the dispensing equipment. Continue
mixing fluid while the dispensing equipment is being
supplied.
NOTE: Always use moderate agitation speeds.
Excessive agitator speed may cause vibration,
foaming of fluid, and increased wear on parts.
(rpm)
— UL Motor Agitator Shaft Speed – – – ATEX Motor Agitator Shaft speed
10
650
600
550
500
450
400
350
300
250
200
150
100
50
0
2
3
4
5
6
Finding the
Finding
Finding
1. Fill the fluid supply container to about 3 or 4
inches (75 to 100 mm) above the agitator blade.
2. Start the agitator and gradually increase the
speed until a vortex begins to form in the fluid.
3. Reduce the speed slightly, then fill the fluid
container.
NOTE: Speed is limited to approximately 300 rpm for
the 12" (30 cm) impeller.
If using a Graco supplied VFD, the agitator speed
can be calculated by using the formula below, or
determined by the graph below using the VFD
frequency.
Example 1: (AIB) x C = D
Example 2: (10 hz I60 hz) x 1725 rpm = 292 rpm
A
VFD Frequency
B
Motor Frequency
C
Motor Speed
D
Agitator RPM
Note
Divide agitator speed by 5 when agitator
installation contains the optional gear
reducer.
Agitator Shaft Speed
7
8
9
10
11
12
13
VFD Frequency (Hz)
the Proper
Proper Agitator
Agitator Speed
the
Proper
Agitator
14
15
16
17
18
19
20
Speed
Speed
3A4553F
Advertisement
Table of Contents
