Jim Nelson’s Helpful Hints: Drum Pumps

drumYamada makes drum pumps in 3 port sizes. The 3/8” pump is available in Aluminum and Stainless Steel. The 1/2” pump is available in Polypropylene or Kynar. The 3/4” pump is available in Polypropylene, Aluminum or Stainless Steel.

All pumps come with a 2” bung fitting and fit a standard 55 gallon drum. When using a drum pump on flammable products remember to ground the barrel and the pump to eliminate state discharge.
Also, when the barrel is empty they become top heavy so make sure that it is supported properly to prevent tipping over.

Dave’s Corner: Proximity Sensor

Proximity Sensors can be provided on almost any Yamada pump. They are used to send a signal every time the pump completes a cycle. This signal can then be used to count cycles for preventative maintenance. It can also be used to monitor flow rate.

When used for one of these purposes the signal is usually sent to a basic digital counter that has no control capability. In addition to giving a totalized readout in cycles it will also be able to totalize in any engineered unit, such as gallons, cubic feet, cubic meters, liters, etc.

Most basic counters will also be able to give a readout in GPM, L/M, or other flow rates. When using a proximity sensor with a PLC and a solenoid in the air line you can also perform batch metering. In other words, you can pump to a predetermined amount and have the pump shut off at that predetermined amount.

The proximity sensor comes in two configurations. Please consult Yamada America for more information about proximity sensors and their use.

-P1 ISA 10-30VDC 3 wire unit
-P2 ISA 24-240VAC 2 wire unit

proximity sensor

Jim Nelson’s Helpful Hints: Not Your Father’s Dry Run Protector

I receive many calls from end user’s telling me that their pump has failed from dry running . Upon further investigation I find out that their problem is with a competitor’s piston pump, not an air operated double diaphragm pump.


For these applications we have suggested using our DRD-100 Dry Run Detector and have been receiving great results. So remember, dry run can be controlled on our pumps or the competition.

Dave’s Corner: EX-Air Valves

When we refer to EX-Air Valves we are talking about electrically controlled shuttle valves as opposed to a pump that uses a c-spool piloted by an air signal from the pilot valve. The EX-Air Valve is available on all pumps except the NDP-5 and NDP-15 series pumps.

This type of valve can be directly mounted on the pump or remotely mounted. It is available in single or dual solenoid versions and is available in 12VDC, 24VDC, and 115VAC.

A pump equipped with this type of valve is used for metering and batch control. It is used with our YSC-3 controller or can also be used with a PLC.

The standard valve that is used with our YSC-3 controller is 12VDC, single solenoid. Below is a matrix for selecting the appropriate valve for your EXAir application.

EX-air valves