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Original instructions
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Pressure and capacity data
(based on water at 20°C/68°F and at full vol-
tage of the motor)
Pressure Flow Amp. Draw
Bar psi lit/min USGPM 12V 24V
0 0 36 9,5 8,9A 4,4A
0,5 7,3 33,9 9,0 10,6A 5,4A
1,0 14,5 31 8,2 13,7A 6,9A
1,5 21,7 28,6 7,6 16,9A 8,6A
2,0 29 25,9 6,8 19,5A 10,0A
2,4 34,8 12,2 3,2 10,3A 4,7A
2,8 40,6 11,2 3,0 11,2A 5,1A
Water Pressure Systems 10.4 Duo mounted
to DC motor 12/24 V.
Typical applications
TheWPS10.4Duoistwove-chamberpos-
itivedisplacementdiaphragmpumps.These
pumps are the ideal choice for pressurizing
water in a closed system such as that found
in a boat or in a recreational vehicle.
Theycaneasilybuildthepressurerequired
for a pressurized water supply system.
Features
• Quietoperation.
• Smoothowing.
• Self-priming.
• Integratedpressureswitchesturnspumps
on and off automatically when tap is
opened or closed.
• Dryrunningwithoutdamage.
• Lowpowerconsumption.
• Quickdisconnectttings.
Working principle
As the pumps run, pressure builds until 2.0
bar/ 29 psi. At this point, the integrated pres-
sure automatically switch off the first pump.
At 2.8 bar/41 psi the second pump is shut
off in the same way.
Thepumpsareequippedwithpositively
checking outlet valves, which ensure
that the pressure is maintained after the
pumps shut off.
When water is demanded (at the faucet, sho-
wer etc.) the pressure decreases.
After a moderate drop in pressure, the inte-
grated pressure switches automatically turns
the pumps back on.
Due to their durable construction and the
thoughtful design, the WPS 10.4 DUO
pumps will provide many years of service.
IMPORTANT!Thepressureswitchsetting
of this pump is made at the factory.
Warranty invalidated by pressure switch in-
terference.
Technical description
Body: Polypropylene
Valve housing: Polypropylene
Valves: Santoprene
Diaphragm: Santoprene
Connection: 1/2” hose (ø 18 mm).
Max liquid temp: Max +50°C/+120°F
Fasteners: Stainless steel
Max. suction lift: 2.5 m/8.2 ft
Cut in pressure: 1,4 bar/20,3 Psi (pump 1)
1,7 bar/25 Psi (pump 2)
Cut off pressure: 2,0 bar/29 Psi (pump 1)
2,8 bar/41 Psi (pump 2)
Duty cycle: Intermittent max 20 min.
Motor: WPS 10.4 – 300 W
12/24 VDC with built in
thermal protection.
Accumulator
tank: Corrosion protected tank
with internal rubber bladder.
Capacity 2 liters. Precharge
pressure, 0.8 bar. Air valve,
standard tire valve.
Themotorisignitionprotectedaccordingto
ISO 8846 (Small craft –Electrical devices -
Protection against ignition of surrounding flam-
mable gases).
Type designation
Type Part no.
WPS 10.4 DUO 12V 10-13409-01
WPS 10.4 DUO 24V 10-13409-02
