PUMP SERIES
EW = IP65 electronic
metering pump with external pulse
control or manual speed control (adjustable to 360
strokes per minute) and manually adjustable stroke
length. (Turndown ratio 1800:1)
CAPACITY/PRESSURE RATING
See chart on this page
CONTROL MODULE
F = For use on all EW models, features digitally adjustable
speed and external pulse input control, stop & pre-stop
inputs.
Y = For use on all EW models, features analog input,
digital input w/multiply & divide, PosiFlow input and
alarm outputs.
VOLTAGE
1 = 115VAC, 50/60 Hz
2 = 230VAC, 50/60 Hz
LIQUID END
See chart on this page
OPTIONS
A = Auto Air Vent Valve installed in place of manual air
vent
valve. Available for B11, B16, C16 and C21
sizes with -VC liquid ends only.
M = Multifunction Valve is supplied in place of the manual
air vent
valve. Available for the 11, 16 and 21 size
pumps with VC, VE, VF, PC, and PE liquid ends. Not
available with the AAVV feature.
H = High pressure pump configuration available with PC,
PE liquid ends only. High pressure pump max. speed
is 240 SPM.
CONNECTORS (SOLD SEPARATELY)
E90494 4-Pin, Reverse Key Connector. Use for Stop/Pre-
Stop inputs on EW/EW-Y.
E90495 5-Pin Connector. Use for Pulse in and Outputs on
EW. Use for digital or analog inputs on EW-Y.
Supplied standard with EW-Y pumps.
E90496 5-Pin, Reverse Key Connector. use for Posiflow
input on EW-Y.
E90497 4-Pin Square Connector. Use for output
connectors on EW-Y.
All pumps include a manual air vent
valve with the exception
of FC liquid ends. All pumps include one foot
valve, one
injection
valve, 20 feet of polyethylene tubing and one
ceramic weight with the exception of SH liquid ends.
ABOUT US
Walchem integrates its advanced sensing, instrumentation, fluid
pumping and communications technologies to deliver reliable and
innovative solutions to the global water treatment market.
Our in-house engineering is driven by quality, technology and
innovation. For more information on the entire Walchem
product line, visit: www.walchem.com
Walchem, An Iwaki America Incorporated Company
Five Boynton Road Hopping Brook Park
Holliston, MA 01746 USA
Phone: 508-429-1110
Fax: 508-429-7433
www.walchem.com
180247.F1 Oct 2008
ORDER INFORMATION
Liquid
End
Pump
Head &
Fittings Diaphragm
Valve
Balls
Valve
Seat
Valve
Seals Gasket Tubing
PC GFRPP
PTFE
(bonded to
EPDM)
CE FKM FKM
PTFE
PE
PE GFRPP CE EPDM EPDM
VC PVC CE FKM FKM
VE PVC CE EPDM EPDM
VF PVC PTFE EPDM EPDM
TC PVDF CE FKM FKM
FC PVDF CE PCTFE PTFE
SH SS HC HC PTFE 1/4” NPTF
Liquid End Materials
CE Alumina ceramic EPDM Ethylene propylene diene monomer
FKM Fluoroelastomer GFRPP Glass fiber reinforced polypropylene
PE Polyethylene PTFE Polytetrafluoroethylene
PCTFE Polychlorotrifluoroethylene PVC Polyvinylchloride (translucent)
PVDF Polyvinylidenefluoride HC Hastelloy C276
EW
Capacity/
Pressure
Control Voltage
Module
Liquid
End
Pump Options
series
B16 F 1 VC A
Capacity/Pressure Rating
Size
Max Output
Capacity
Max
output per
stroke
Max Pressure1 Connection Size (in)
Tubing O.D.
GPH mL/min mL PSI MPa
B11 0.6 38 0.11 150 1.0 3/8
B11-H 0.3 21 0.09 250 1.7 3/8 (suc) x 1/4 NPT (dis)
B16 1.0 65 0.18 105 0.7 3/8
B21 1.8 115 0.32 60 0.4 3/8
B31 3.3 210 0.58 30 0.2 1/2
C16 1.3 80 0.22 150 1.0 3/8
C16-H 0.6 40 0.17 250 1.7 3/8 (suc) x 1/4 NPT (dis)
C21 2.3 145 0.40 105 0.7 3/8
C31 4.3 270 0.75 50 0.35 1/2
C362 6.7 420 1.17 30 0.2 1/2
1 Auto Air vent
valve reduces maximum pressure approx. 35 PSI (0.2 MPa)
2 Output of the EWC36-TC/FC/SH is 6.3 GPH (400 ml/min)
