Goulds Pumps 3296M - IOM - Manual (Page 79)

CONDITION MONITORING DEVICES
NEMA 7 Pressure Switch (Option)
Leak Detector
DESCRIPTION
This detector senses a leak in the containment shell by detecting pressure in the bearing frame bell housing. A
pressure switch preset to trip at 10 PSIG on increasing pressure is supplied. The switch must be wired to the
customer's monitoring system to sound an alarm and/or stop the pump. This liquid leak detector is identical in
operation and function to the NEMA 4 pressure switch leak detector. The only difference is the NEMA rating.
Recommended usage is also for volatile liquids.
LIMITATIONS
1. The total developed pressure of the pump plus suction pressure must be above 15 PSIG in order to have
sufficient pressure in containment shell to trip switch should there be a leak.
l
! CAUTION
This method of leak detection may not prevent release of pumpage to the atmosphere. It is possible that liquid
could infiltrate bearing frame lubricating oil.
COMPONENTS SUPPLIED
(1) Pressure Switch - Custom Control Sensors, Inc., Model 511GCE1
Specifications
Rating - NEMA7 Explosion Proof: DIV 1,2
¼ - 18 NPT Pressure Port
½ - 14 NPT Conduit Connection
18" Free Leads
Wetted Parts
* 316SS
Trip Point - Preset at 10 PSIG (69 kPa) on increasing pressure
Switch Element * SPDT
* 120/240 VAC
* 50/60 Hz
* 11 Amps
Ambient Temperature Range -30° F to 160° F (-34° C - 71° C)
3296 M Group 6/05
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