Knowledge Base:  
Motor Pump - Vibration Monitoring for Horizontal Motor Driven Pumps
Last Updated: 05/23/2017
Download the PDFMotor Driven Pump

Machinery Applications Include: Horizontal Pumps with Rolling Element Bearings, API Pumps,
ANSI Pumps, Centrifugal Pump, Booster Pumps, Multistage Pumps, Axial Flow Pump, Fire Pump, Industrial Pumps, Overhung Pumps, Multistage Pump, End Suction Pump, Slurry Pump, Pump Condition Monitoring, Pump Vibration Monitoring, Pump Protection System, Pump VMS.

Simple constant speed (synchronous) Motor Driven Pumps of both the Overhung and Centerhung Type using Rolling Element Bearings (REB) should be monitored with Industrial Accelerometers mounted at each Radial Bearing. Only X or Horizontal Accelerometers marked in Red are recommended for Full Time Vibration Monitoring (Protection) System. Walk Around Data Collector or PdM Programs usually require X Horizontal (Red), Y Vertical and Z Axial (Green) Sensors for analysis. When economic decisions must be made to reduce sensor count due to the size or criticality of the Motor Driven Pump X or horizontal sensors should be installed first as they are closer to the load zone of the bearing and in direction of freedom of movement.

Pump Motor

PdM or Data Collector BOM:

Recommended for walk around Data Collector Programs where the number of sensors or vibration measurement points is based on the current established collection and analysis techniques. Permanently mounted Accelerometers provide a more reliable and repeatable reading and the local BNC Switch Box allows for faster, safer and more convenient data collection. STI Products work with all manufactures data collectors and analyzers.

Protection System BOM using Plant PLC or DCS:

Meets the requirements of API-670 and provides a simple low cost approach to Vibration Monitoring making use of the plants PLC/DCS or Historian for alarming and trending of values. A 4-20mA signal is provided for connection to local Field IO. The STI CMCP500 Series Transmitters connected to the machine mounted accelerometers provide Signal Integration (gs to Velocity), Power Regulation, OK Circuitry, Timed OK Danger Defeat, Range Selection and Constant Current Sensor Power.

Protection System BOM (Stand Alone):

Meets the requirements of API-670 and provides all the features of the above Protection System with the addition of Relay Modules and Displays. OK, Alert and Danger Alarms and 5 amp Relays are provided for each channel. The ability to select alarm delay, trip multiply, latching or non-latching relays are provided. Terminal for remote reset is also provided. The CMCP5304 is a complete system simply supply AC line power and connect sensors.

Recommended Installation Accessories (All Systems):

Quantities vary as shown depending on the BOM selected above. More details and instructions on Accelerometer Installation can be found under our Application Notes at this link:

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