How do I pump high viscosity fluids?

If it pours, you can pump it.
A. Use large suction lines, up to three times the size of the pump ports.
B. Position the pump as close to (or below) the level of the fluid as possible.
C. Start the fluid slowly using an air line valve. Set the air pressure and crack the valve open slowly.

When I cannot find a certain chemical on the resistance chart, what do I do?

A. Ask what materials are presently being used to transfer the fluid or if there is a manufacturer’s recommendation that is on the fluid container, etc.
B. If there is no other information on this chemical, you will have to check with the manufacturer of the fluid and find out what is recommended.
C. Never guess on the chemical compatibility of a particular material.

Do I have to ground the pump when pumping flammable fluids?

Yes. This can be done with conductive plastic pumps via the grounding lugs. If you are not using a conductive plastic pump then ground the fluid through a metallic pipe nipple at both the suction and discharge ports. Metal pumps should also be grounded.

How often should I tighten fasteners on my plastic pumps?

That depends on the application. Pressure, average hours in service, and temperature all affect the flow of plastic. Pumps need tightening if leakage should occur. Tightening should be part of any preventive maintenance program and should be based on the service duty of the pump.

How should I regulate the flow of a diaphragm pump?

You can regulate the flow of a diaphragm pump three ways. Reduce or increase the air pressure, making sure that you are within the operating limits of the pump. You can increase or decrease the amount of air volume going to the pump via a valve on the air line and finally, a valve on the fluid discharge may be opened or closed. NEVER restrict fluid suction lines!

Can I submerge the pump?

Yes, if the fluid is compatible with the pump housing and fasteners and if you pipe the exhaust above the level of the fluid.