Walchem EJ Specifications

Metering Pumps

EJ Series

The EJ Series provide precise chemical injection at
an economical price.

Universal voltage capability enables operation from
100 - 240 VAC in virtually all countries.

The EJ Series are compact, simple to operate and
have outputs to 1.3 GPH (4.8 LPH) and a maximum
pressure of 175 PSI (1.2 MPa).

Summary of Key Benets

High Speed Performance

The EJ Series operate at 360 strokes-per-minute, providing high
resolution chemical feed and high turndown capability. Most
competitive products operate at slower speeds, resulting in slug
feeding, accelerated diaphragm wear and poor feed control.

Universal Voltage

The Universal Voltage Function enables the EJ Series to operate at any
AC voltage. The EJ Series also conform to global standards.

External Control

The EJ Series have both digital input and Stop/Start inputs built into the
pump, enabling either proportional or On/Off control.

IP65 Equivalent Protection

A robust housing protects the pump from normal wear. Mounting the
Digital Display and Key Pad control within the drive housing creates a
highly water resistant design. A clear cover further protects the pump
from liquids.

Specifications

8.65”

7.66”

0.24”

Pump

Model B09* B11 B16 B21

Max. capacity

Max. discharge
pressure

(mL/min)

PSI

(MPa)

(19)

175

(1.2)

0.5

(30)

150
(1.0)90(0.6)45(0.3)

0.8

(50)

1.3

(80)

GPH

0.3

Stroke rate spm 1 to 360

Power
consumption

W 12

Current (Input) A 0.8

Shipping Weight lbs (kg) 8.0 (3.6)

• The above information is based on pumping clean water at rated voltage
and ambient temperature.

• Flow rates were collected at the maximum discharge pressure and
360spm. Degassing option derates capacit y by approximately 20%.

• *B09 size is available in PVC liquid ends only

• Flow rate increases as discharge pressure decreases.

• Allowable ambient temperature: 0 to 104°F (0 to 40°C)

• Allowable liquid temperature: 0 to 104°F (0 to 40 °C)

• Allowable power voltage deviation: ±10% of the rated voltage

• Noise level: 65dB at 10 ft. (A scale)

• E90495 (eld-wireable connector) or IX0018 (connector with 5 f t. cable)
required for Inputs.

Controller

Operation
mode

Mode

Mode selection Key operation

Setting range 1 to 360spm

Stroke rate

STOP function Input signal

SPM
programming

No-voltage contact or open

Maximum spm 360spm

EXT mode

Monitors

Pump behavior 1 shots per signal

Input signal

LCD

LED

No-voltage contact or open

7×3 LCD with three status

Green LED×1 (blinks at each

Buer Non-volatile memory

Power voltage

1. The max voltage from the EJ to an external contact is 15V at 3mA. When
using a me chanical relay, the minimum load shoul d be 3mA or below.

2. When the ex ternal pulse signal is over the max spm, the extra pulses are
ignored.

3. The allowable voltage range is 90 to 264VAC. Outside of this range, failure
may result.

Note 3

Manual

EXT

UP key

Note 1

collector

Note 2

Note 1

collector

codes

shot)

100 to 240VAC 50/60Hz

Safety Certifications

The EJ series metering pumps* are WQA tested
and certified to NSF/ANSI Standard 50 and

Standard 61.

* See www.wqa.org for specific chemicals and certification parameters.

The EJ series metering pumps are tested by
Intertek to UL and CSA standards.

180606.J June 2019

EJ - B 11 VC U R

Drive unit symbol

Average power consumption

B: 12W

Diaphragm diameter
*09: 8mm, 11: 10mm
16: 15mm, 21: 20mm

Wet-end material symbol

For details, see the
Liquid End Materials table.

Controller function code
R: External control

Connection (No Character)

3/8” OD x 1/4” ID (09-21 sizes)
For other options, consult factory

Dimensions

1.87”

2 Valve

3 O-ring

1 Pump Head

5 Gasket

6 Diaphragm

4 Valve Seat

0.35”

0.65”

3.01” 3.94”1.44”

1.26”

0.39”

0.94”

0.20”

3.46”

Liquid End Materials

1 2 3 4 5 6

Material

VC PVC CE FKM FKM PTFE

VE

VF

TC

PC

PE

FC

TA

PA

SHN

CE Alumina ceramic EPDM Ethylene propylene diene monomer
FKM Flu oroel astomer GFRPP Glass fiber reinforced polypropylene
PTFE Polytetrafluoroethylene PVC Polyvinylchloride (translucent)
PCTFE Polychlorotrifluoroethylene PVDF Polyvinylidenefluoride
AFLAS® Tetrafluoroethylene-Propylene

Pump head Valve O-Ring Valve seat Gasket Diaphragm

PVC CE EPDM EPDM PTFE

PVC PTFE EPDM EPDM PTFE

PVDF CE FKM FKM PTFE

GFRPP CE FKM FKM PTFE

GFRPP CE EPDM EPDM PTFE

PVDF CE PTFE PCTFE PTFE

PVDF CE

GFRPP CE

316SS 316SS

®

AFLAS

AFLAS

---

Walchem, Iwaki America Inc.
Five Boynton Road Hopping Brook Park
Holliston, MA 01746 USA
Phone: [phone] www.walchem.com

PCTFE PTFE

®

PCTFE PTFE

316SS PTFE

Special version
A: Auto degassing valve
M: Multifunction valve

Power code
U: US 115 VAC plug
2: US 230 VAC plug

3.78”

0.78”

PTFE +

EPDM
backer

6.25”

7.66”