S420 Series
Accepts 4-20mA analog input signal
Highlights
- Leak detection
- Backup pump capability
- Remote start or stop
- LED Indicators
- Three dedicated output relays
- 2 year warranty
Flow Rate Output Control with 4-20mA Analog Input Signal or Manual Adjustment
The S420 Series (watch video) variable speed peristaltic metering pumps dose liquid solutions in direct proportion to a 4-20mA analog input signal. The operator can scale the pump’s response to the signal from 25% to 100% by the potentiometer on the control pad. When operated in the manual mode the maximum flow rate output is adjustable from 5% to 100%.
The pump’s ability to accept an incoming 4-20mA analog signal to pace the pump makes the S420 well suited for use with water treatment controls including pH and ORP monitors to maintain proper water chemistry and treatment of effluent discharge water. Common installations include industrial and municipal wastewater treatment facilities or municipalities that supply potable water to residential and commercial sites requiring well or surface water treatment. For the treatment of process water, the S420 can inject solutions such as disinfectants, oxidizing agents, acids, and alkaline. Please check available chemical resistant charts for compatibility.
Additional Applications
- Injection of liquid biocides in cooling towers for prevention of Legionnaires disease
- Corrosion, scale, and algae control on plumbing fixtures and water supply equipment
- Metering additives specific to a manufacturing process
- pH control for process water or metal plating discharge water
Features
The S420 offers practical value-added features. The leak detection feature has a dedicated output relay and an LED status indicator on the control pad. When a leak is detected, the pump stops operating, provides an output signal and the Leak LED illuminates. The pump offers back-up capability to the primary pump to maintain operation in critical applications. When activated, the primary pump transfers operation seamlessly to the back-up pump. There are additional LED indicators that communicate the status of the pump.
Built for heavy-duty applications and challenging environments the pump has a brushless DC motor with ball bearing support and a rugged polycarbonate enclosure with NEMA 4X rating. Tube replacement is without tools and is standard on all Stenner metering pumps. The pump heads and tubes are interchangeable to convert one model to another without having to purchase a new pump. The S420 series has a 2 year warranty.
The series is categorized by three item number prefixes, S34, S44, & S54. Pumps beginning with S34 have six flow rate outputs ranging from up to 40 gallons per day with operating pressures to 100 psi maximum and up to 85 gallons per day with operating pressures to 25 psi maximum. Pumps beginning with S44 have two flow rate outputs of 60 gallons per day with operating pressures to 100 psi maximum and of 150 gallons per day with operating pressures to 25 psi maximum. Pumps beginning with S54 have two flow rate outputs of 125 gallons per day with operating pressures to 100 psi maximum and of 315 gallons per day with operating pressures to 25 psi maximum.
How It Works
The pump flow rate output is adjusted by an incoming 4-20mA analog input signal which can be scaled by the potentiometer on the control pad. The maximum flow rate output is scalable from 25% to 100%. When in manual mode the flow rate output is adjustable from 5% to 100%.
Stenner Peristaltic Pump Advantages
- Self-priming against max. working pressure; foot valve not required
- Solutions do not contact moving parts
- Pump head requires no valves, allows for easy maintenance
- Does not lose prime or vapor lock
- Pumps off-gassing solutions and can run dry.
- Output volume is not affected by backpressure.
- SImple tube replacement
