Operator Tips: Maintenance, Spare Part Kits, Replacement Components – Prominent Pumps & Analyzers

www.ablewright.com

By Doug Mitch / Able Wright, Inc.

Chemical Metering Pumps and Analyzers must be properly serviced to insure reliable operation. The following recommendations are provided for Operator maintenance…

Chemical Metering Pumps

Maintenance intervals

• Every quarter, when subject to normal usage (i.e. 30% to 80% operation)

• Shorter intervals when subject to heavier usage (i.e. continuous operation)

• Replace the diaphragm and pump valves annually, or as required, using a Spare Parts Kit selected specifically for your pump and chemical service.

Maintenance actions

For standard liquid end pumps:

Check the diaphragm for damage

Check for any chemical seepage at the vent hole

Check the condition of solution tubing (brittle, cracked, stained, etc.)

Check that the suction & discharge tubing are connected firmly to the liquid end

Check that discharge and suction valves are firmly fixed

Check that the coarse/fine bleed valve is functioning properly

Check that the liquid end is generally watertight

Check for correct feed: run the pump for a short period (rapid priming, proper operation, abnormal noises, etc.)

Check electrical connections for damage or wear

Check that liquid end screws are fastened tightly

Analyzers / Membrane Cap Sensors

Maintenance intervals

• Daily or weekly, dependent upon application

• Shorter intervals on critical analyzer applications (i.e. disinfection applications, pump dosage control, etc.)

• Replace the diaphragm and pump valves annually, or as required, using a Spare Parts Kit selected specifically for your pump and chemical service.

Maintenance actions

IMPORTANT: The sensor must be regularly serviced in order to avoid exceeding dosage due to sensor failure!

Do not touch the sensors or bring into contact with substances containing grease.

Check the sensor display value on the controller using an appropriate standard test (i.e. chlorine DPD-1).

If necessary recalibrate the sensor

If it is no longer possible to calibrate the sensor you can try to clean the

Membrane

Cleaning the membrane

First disassemble the sensor. Observe the safety instructions.

Carefully brush away debris clinging to the membrane ca

Rinse the membrane under a gentle stream of cold tap water.

Removing deposits (scale, rust):

Disassemble the membrane cap

Place the membrane cap in a bath of 5 % hydrochloric acid overnight

Rinse the membrane cap under plenty of water.

Refill the membrane cap with electrolyte, reassemble the unit

Run the analyzer for 24 hours and recalibrate

Replacing the membrane cap

If the sensor fails to hold calibration even after cleaning the membrane, or if the

membrane is damaged; you must replace the membrane cap

NOTE: The electrolyte can be disposed of with normal in-house waste. The electronic sensor is classified as special waste, and should be disposed of in accordance with local guidelines.

OPERATORS: If we can be of assistance to you in selecting the proper spare parts kit for your chemical metering pump or analyzer, or insuring that the proper materials have been selected for the chemical you are handling – give us a call.

We offer field service and prompt delivery of spare parts kits & replacement components for all Prominent Fluid Controls equipment, as well as factory rebuilds.

Contact us at:

Able Wright, Inc.

PO Box 849

Plains, MT 59859

(406)250-8389

www.ablewright.com

AbleWright@blackfoot.net

Doug Mitch is the founder and President of Able Wright, Inc. – a provider of water treatment equipment and technical services, specializing in disinfection and chemical feed applications in Montana, Wyoming, Idaho, and Washington.

www.AbleWright.com