Pumps

S420

Accepts 4-20mA analog input signal

S420 Series Models

S34

S44

S54

The S420 Series is a variable speed peristaltic metering pumps which doses 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.

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 backup capability to the primary pump to maintain operation in critical applications. When activated, the primary pump transfers operation seamlessly to the backup 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. Simple tube replacement is standard on all Stenner metering pumps. The S420 series has a 2 year warranty.

S420 Series Video

Flow Rate Outputs

Technical Data

Parts

Exploded View

Flow Rate Outputs

Pump Prefix	Pump Tube	Turndown 4-20mA Mode	Turndown Manual Mode	Gallons per Day	Gallons per Hour	Ounces per Hour	Ounces per Minute	Liters per Day	Liters per Hour	Milliliters per Hour	Milliliters per Minute
25 psi (1.7 bar) max.					Approximate Output @ 50/60Hz
S3403	3	100:1	20:1	40.0	1.67	213.0	3.56	151.0	6.31	6309.0	105.0
S3404	4	100:1	20:1	60.0	2.50	320.0	5.33	227.0	9.46	9464.0	158.0
S3405	5	100:1	20:1	85.0	3.54	453.0	7.56	322.0	13.41	13,407.0	223.0
S445X	5X	100:1	20:1	150.0	6.25	800.0	13.33	568.0	23.66	23,659.0	394.0
S545G	5G	100:1	20:1	315.0	13.13	1680.0	28.0	1192.0	49.68	49,684.0	828.0
100 psi (6.9 bar) max.					Approximate Output @ 50/60Hz
S3401	1	100:1	20:1	5.0	0.21	27.0	0.44	19.0	0.79	789.0	13.0
S3402	2	100:1	20:1	17.0	0.71	91.0	1.51	64.0	2.68	2681.0	45.0
S3407	7	100:1	20:1	40.0	1.67	213.0	3.56	151.0	6.31	6309.0	105.0
S447X	7X	100:1	20:1	60.0	2.50	320.0	5.33	227.0	9.46	9464.0	158.0
S547G	7G	100:1	20:1	125.0	5.21	667.0	11.11	473.0	19.72	19,716.0	329.0

Notice: The information within the charts above is solely intended for use as a guide. The output data is an approximation based on pumping water under a controlled testing environment. Many variables can affect the output of the pump. Stenner Pump Company recommends that all metering pumps undergo field calibration by means of analytical testing to confirm their outputs

Technical Data

Specifications

Flow Rate Output Control

4-20mA analog input signal or manual

Reproducibility

+/- 2%

Maximum Working Pressure

25 psi (1.7 bar), 100 psi (6.9 bar)

Maximum Operating Temperature

104°F (40°C)

Maximum Suction Lift

25 ft (7.6 m) vertical lift, based on water

Motor Type

Brushless DC motor

Shaft RPM (average maximum)

Duty Cycle

Continuous

Maximum Viscosity

1500 Centipoise

Motor Voltage (Amp Draw)

120V 60Hz 1PH (0.6), 230V 50Hz I PH (0.3), 230V 50Hz 1PH (0.3)

Power Cord Type

120V 60Hz, 230V 60Hz: SJTOWA, 230V 60 Hz SJTOWA, 230V 50Hz: H05RN-F

Power Cord Plug End

120V 60Hz 5-15P, 230V 60Hz 6-15P,
230V 50Hz CEE7/7

Cord Length

6 ft (1.8 m)

Classification

Indoor/Outdoor

Materials of Construction

All Housings

Polycarbonate

Pump Tube (S34, S54)

Santoprene®*(FDA approved), or Versilon®**

Pump Tube (S44)

Santoprene®*(FDA approved)

Check Valve Duckbill (S34)

Santoprenee®* (FDA approved) or Pellethane®†

Ball Check Valve Components (S44, S54)

Ceramic ball (FDA approved); Tantalum spring; FKM seat & O-ring OR
Ceramic ball (FDA approved); Stainless steel spring; EPDM seat; Santoprene®* O-ring

Pump Head Rollers (S34, S44)

Polyethylene

Pump Head Rollers (S54)

Polycarbonate

Guide Rollers (S44, S54)

Polyethylene

Roller Bushings (S34, S44)

Oil impregnated bronze

Roller Ball Bearings (S54)

Stainless steel

Suction/Discharge Line,  and Ferrules

Polyethylene (FDA approved)

Tube & Injection Fittings

PVC or Polypropylene (both NSF listed)

Connecting Nuts

PVC or Polypropylene (both NSF listed)

3/8″ Adapter (S34)

PVC or Polypropylene (both NSF listed)

Suction Line Strainer  and Cap

PVC or Polypropylene (both NSF listed); ceramic weight

All Fasteners

Stainless steel

Pump Head Latches (S34)

Polypropylene

Pump Head Thumb Screws (S44, S54)

Stainless steel and PVC

Pump Head Support & Transition Sleeve (S44, S54)

Santoprene®*

Tube Pull (S4V, S5V)

PVC

Leak Detect Components (S34)

Hastelloy®††

Leak Detect Components (S44, S54)

Hastelloy®†† and stainless steel

Refer to the chemical resistance guide to determine the compatibility of the wetted components with the solution you want to pump or Contact Us.

* Santoprene® is a trademark of Celanese International Corporation.
** Versilon® is a registered trademark of Saint-Gobain Performance Plastics.
† Pellethane® is a registered trademark of Lubrizol Advanced Materials, Inc.
†† Hastelloy® is a registered trademark of Haynes International, Inc.