Parr Magnetic Drive Series
Coupling
Installed
Available
Magnetic
Torque
as Standard
as Optional
Drive No.
Style
Designation
in-lb*
Drive on
Drive on
A1120HC Gen. Purpose General Purpose
16
All 25 mL thru
None
2000 mL Reactors
A1180HC Gen. Purpose Heavy Duty
60
All 1 gal. thru
1000 mL and
5 gal. Reactors
2000 mL Reactors
A1750HC2
Gen. Purpose Extra Heavy Duty
120
None
1000 mL thru 5 Gal. Reactors
A2140HC Footless
General Purpose
16
None
300 mL thru 2000 mL Reactors
A2160HC Footless
Heavy Duty
60
None
1000 mL thru 5 Gal. Reactors
A2170HC Footless
Extra Heavy Duty
120
None
1000 mL thru 5 Gal. Reactors
A2160HC2
Footless
Heavy Duty
60
None
1000 mL thru 5 Gal. Reactors
A2170HC2
Footless
Extra Heavy Duty
120
None
1000 mL thru 5 Gal. Reactors
A3040HC Compact
2.5 in-lb
All 5500 Series
None
(28.2 Ncm)
Compact Reactors
* in-lb = 0.11 Newton Meter
The new 5500 Series Compact
Reactors have a smaller mag-
netic drive that is used with a
1/17 hp motor. It is intended for
low viscosity applications and
has a torque rating of 2.5 in-lb.
Two Styles Available
Parr offers a choice of two
styles of magnetic drives. The
general purpose A1120HC,
A1180HC and A1750HC2 operate
with small diameter stirrer shafts
which require a lower guide or
“foot” bearing to stabilize the
stirrer shaft. These drives are
intended for high speed stirring
for applications involving liquid-
liquid or gas-liquid mixing. The
A2140HC, A2160HC and A2170HC
footless magnetic drives employ
a larger diameter stirrer shaft
designed to operate without this
lower guide or “foot” bearing.
They were originally designed
for digesting ores where the
abrasive solids would get caught
in the PTFE foot bearing and
wear away the stirrer shaft. They
are also recommended for
slower speed mixers such as the
anchor, paddle, or spiral stirrers.
It is also important to select the
appropriate motor which can
handle the increased drag associ-
ated with the larger diameter
shafts.
Alternate Packed
Gland Drive
For rare circumstances where
a direct mechanical drive is pref-
erable to a magnetically coupled
system, Parr can furnish a self-
sealing packed gland which will
maintain a reliable seal on the
stirrer shaft at working pressures
up to 2000 psig (138 bar). These
glands are made to a Parr design
which uses a combination of
cones and O-rings in conjunction
with pressure from within the
vessel to maintain a positive seal
on the rotating shaft.
Today, with the variety of
magnetic drive styles and high
coupling torques, virtually all
reactors except special applica-
tion systems are equipped with
magnetic drives.
1
15
P a r r I n s t r u m e n t C o m p a n y
1 - 8 0 0 - 8 7 2 - 7 7 2 0
D e s i g n F e a t u r e s
