Electronic Metering Pump In Control
WALCHEM CORPORATION, Holliston, MA, highlights the control features and programmability of the EW Metering Pump Series with the Y Control Module.
The EW Series pumps are solenoid-driven, diaphragm metering pumps with output capacities up to 6.7 GPH (25.4 L/H) and maximum pressures of 150 PSI (10 bar). An 8-bit microprocessor, LED digital display and keypad ensure accurate and reliable operation and programming. This design, combined with input control signals, output relays, and a turndown ration of 1800:1, makes the EW-Y pump adept in virtually any application.
The Y Control Module also has two output relays that can be configured to trigger on any of the six possible output indications. These can be used to operate a second pump, start a redundant pump, or provide the following indications: a need for service, a low level, an empty level, a loss of prime (using a PosiFlow sensor), a pump stop, an end-of-batch, and a pump operational. An integral feed verification system is possible with the Y Control Module and the signal from a PosiFlow sensor. All of the inputs and outputs interface with the pump via external connectors making for quick and easy connections.
Analogue or digital signals can be used to control the pump for either proportional control or remote operation. The analogue input can be programmed using two points to create a Signal vs. SPM curve with any slope. Digital inputs are most often used for proportional control, but batching can also be accomplished with this signal utilizing the multiply feature (divide is also possible).
The EW Series metering pumps are covered with a complete 2-year warranty, including all liquid end components. The EW Series is another example of Walchem's commitment to bring its customers the best technology in metering pumps and analytical controls.
Source: Walchem, Iwaki America, Inc.
