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The first letter identifies the material of the suction
housing.
C — Cast Iron
E — Carpenter 20 Stainless Steel*
H — Hastelloy “C” **
M — Monel***
S — 316 Stainless Steel
W — Cast Steel
X — Special to application
Note: The bearing housing of the pump is always made of
cast iron.
The second letter indicates the material used in the drive
shaft, connecting rod, rotor and other wettable parts.
D — Alloy Steel
E — Carpenter 20 Stainless Steel*
G — 416 Stainless Steel
H — Hastelloy “C” **
J — 17-4 PH Stainless Steel
M — Monel***
S — 316 Stainless Steel
X — Special to application
The third letter indicates the material of the stator. It
identifies only the stator material and not that of the tube in
which the stator is placed, which is always carbon steel.
Standard stator materials used in the Moyno 2000 pump are
as follows:
B — EPDM 300, 70 Durometer
C — Nitrile 103, 50 Durometer
D — Tool Steel
E — Nitrile 110, 70 Durometer
F — Fluoroelastomer 500, 75 Durometer
G — 416 Stainless Steel
H — Hastelloy “C” **
J — 17-4 PH Stainless Steel
K — Hypalon 800, 70 Durometer †
M — Nitrile 100M 70 Durometer
P — Thiokol 70 Durometer ‡
Q — Nitrile 100, 70 Durometer
R — Natural Rubber 200, 55 Durometer
I — Teflon 15% glass †
U — Urethane 70 Durometer
X — Special to application
Z — White Nitrile 150, 70 Durometer
A typical type designation such as CDQ, would identify the
following materials of construction:
C = Cast iron suction housing
D = Alloy steel rotor, drive shaft, connecting rod
and other minor metallic parts in contact
with the fluid being pumped.
Q = Nitrile (70 durometer) stator
* Carpenter 20 is a trademark of Carpenter Technology
Corp.
** Hastelloy is a trademark of Cabot Corp.
*** Monel is a trademark of INCO Alloy Corp.
† Hypalon and Teflon are trademarks of E.I. DuPont de
Nemours and Company
‡ Thiokol is a trademark of Morton Thiokol Inc.
1-8. Trim Code. Also included in the Model Number is the
three character Trim Code which is used to identify pump
construction. The letters “AAA” signify standard construction,
with letters other than “A” signifying variations. The first letter
identifies sealing variations; the second, internal variations;
and the third, rotor variations.
1-9. Variations of Standard Parts. Refer to Sections 4-40
through 4-42 for variations available for modifying pumps to
meet specialized pumping conditions. If the trim code of your
pump is other than “AAA,” contact your nearest Moyno
representative for clarification. Do not modify your pump with
any variation unless you have determined that it is
compatible with your application.
2-1. INSTALLATION
2-2. GENERAL
Moyno pumps are lubricated and tested at the factory prior
to shipment and require minimum pre-start up maintenance.
Packing, however, is not lubricated at the factory.
Accessibility to the pump and adequate clearance should
be a prime consideration in any installation. Enough space
should surround the unit so that maintenance can be carried
out with ease.
2-3. PIPING
2-4. Suction piping should be as short as possible. Nor-
mally, the suction line should be the same size as the pump
suction; however, conditions, such as high viscosity or flow
velocities, may dictate otherwise. Long-sweep 90-degree
elbows or 45-degree elbows should be used instead of
standard elbows. Piping configurations, which trap air,
should be avoided.
2-5. Suction housing rotation to any position 360° about
the centerline of the pump is possible. To rotate, loosen the
hex head bolts holding the clamp ring to the bearing housing.
Remove the packing gland halves and the packing studs.
Loosen the stator support cap and rotate the suction
housing, stator and discharge flange together. Replace the
packing gland studs in the threaded hole provided.
CAUTION: Rotating the suction flange by any other
method may tear the stator gaskets causing
a leak. Once the gaskets have been com-
pressed, it is virtually impossible to rotate
any one of the two compressing surfaces
without tearing the gasket.
2-6. Discharge piping diameter should generally be as
large as the pump ports unless fluid conditions indicate
otherwise.
An easily removable section of piping one-to-two times
longer than the connecting rod should be mated to the
discharge port. This will allow the stator to be removed
without having to disassemble the complete pump.
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