moyno 331 Service Manual

SANITARY MODELS
These pumps include housings polished to a #4 finish
both inside and out. The mechanical seal is a 3A approved
seal with carbon/ceramic faces. The elastomers meet the
FDA requirement for food contact. These pumps meet 3A
requirements. The universal joint may be dismantled for
cleaning.
HYGIENIC MODELS
These pumps provide the quick disassembly features
of the sanitary version for easy cleaning. The housings
are 316 stainless steel construction, however, they
are not polished. These pumps utilize rubber-covered
universal joints. The stators are available in non-FDA nitrile,
EPDM, and fluoroelastomers. The mechanical seals are
rubber bellows type with carbon/ceramic faces.

INSTALLATION

Mounting Position. Pump may be mounted in any position.
When mounting vertically, it is necessary to keep the
bearings above the seals to prevent possible seal leakage
into the bearings.
Pre-Wetting. Prior to connection the pump, wet the pump
elements and mechanical seal by adding fluid to be
pumped into suction and discharge ports. Turn the shaft over
several times in a clockwise direction to work fluid into the
elements.
Piping. Piping to the pump should be self-supporting
to avoid excessive strain on pump housings.
Drive. On belt driven units, adjust belt tension to point
of non-slip. Do not overtighten.
SERVICE MANUAL
MOYNO
SANITARY/HYGIENIC NON-MOTORIZED
331, 332, 333 AND 344 MODELS
® 500 PUMPS
On direct drive units, coupling components should be
aligned and spaced at least 1/16" apart.
Pump rotation must be clockwise when facing shaft to pre-
vent damage to pump. Check direction of rotation before
startup. Maximum speed is 1750 rpm.
Pump Models
Discharge
Pressure
(psig) (maximum)
Elastomer
*NBR (Nitrile)
*EPDM
FPM (Fluoroelastomer)
* FDA Food Grade on Sanitary Models.
Section:
MOYNO ® 500 PUMPS
Page: 1 of 4
Date: March 2002
Table 1. Pump Data
331 332
150 100
Table 2. Temperature Limits
Temperature Limits
10˚-160˚F
10˚-210˚F
10˚-240˚F
333 344
50 40