Jabsco 31820-0492 Handleiding

Jabsco Pomp 31820-0492

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Pagina 1/4

Models 31820,31821 Series

NOTE: Viton equipped models are not suitable

for potable water applications.

* Viton is a registered trademark of DuPont Dow Elastomers L.L.C.

** Santoprene is a registered trademark of Monsanto.

Construction Equipment

Washdown

Spray Equipment

Road Rollers Parts Washing

FEATURES

•Sealless

•Run Dry Ability

•Self-Priming

•Thermal Overload Protected Motor

•Corrosion Protected Motor

•Snap-in 1/2"(13 mm) Dia. Port Adaptors

•Conforms to Electromagnetic Compatibility 89/336/EEC and

Machinery Directive 89/392/EEC, EN50081-1

•Easy Installation

•Flow to 3 GPM/12 LPM

•Low Amp Draw

•Compact Size

•Quiet Running

INDUSTRIAL DIAPHRAGM PUMPS

Commercial Duty, 3 GPM/12 LPM

31820-0492 3 (12) 12 Vdc YES N/A N/A 5 15

31820-0494 3 (12) 24 Vdc YES N/A N/A 2.5 7.5

31821-0492 3 (12) 12 Vdc YES 25 (1.7) 40 (2.8) 5 15

31821-0494 3 (12) 24 Vdc YES 25 (1.7) 40 (2.8) 2.5 7.5

Protective Pressure Switch Settings Recommended

Models Flow Coated Nominal psi (bar) AMP Draw Fuse/Breaker

GPM (LPM) Voltage Motor Cut-In Cut-Out @ 10 psi Sizes

SPECIFICATIONS

Pump Body: Glass Filled Polypropylene

Elastomers: Santoprene** Diaphragm, Valves of Viton*

Hardware: Stainless Steel

Pump Design: Multi-Chamber Diaphragm

Suction Lift: Self-Priming to 10 ft (3 m) (wet)

5 ft (1.5 m) (dry) min.

Duty Cycle: Continuous, Maximum 40 psi (2.8 bar) at

Ambient of 130° F (54.4° C)

Ports: 1/2 (13 mm)"(13 mm) Hose Barb and 1/2"

Straight Pipe Thread

Motor: Permanent Magnet with Thermal

Overload Protection

Temperature: Liquid temperature range is 45°F (7°C)

to 130°F (54.4°C)

Viscosity: 250 centipoise maximum

Shipping Weight: 7 lb (3.2 kg) approx. (12/24 V models)

APPLICATIONS

This pump provides excellent service in the following

applications.

CONSTRUCTION: Water supply pump to the spray bars

of road rollers and other compaction equipment, street

sweepers, and truck mounted dust control systems.

AGRICULTURAL: Supply pump for herbicide and pesti-

cide spraying equipment.

INDUSTRIAL: Fluid transfer applications for mild acids

and bases. Chemical feed pump. Washing fluid supply

pump in parts washing systems. Machine coolant pump.

Concrete saw lubricant supply pump. Recirculating

pump in filtering systems.

Models 31820-Series

31821-Series

OPERATING INSTRUCTIONS

1. MOUNTING – JABSCO diaphragm pumps are self-

priming and may be located in a dry location above or

below the uid supply. To vertically mount these units,

it is best to do so with the motor on top. This will prevent

fluid dripping on the motor in the event of a leak. Place

pump on a solid surface and secure with four mounting

screws being careful not to fully compress the rubber

grommets which act as shock absorbers.

2. PLUMBING – Port adaptors are supplied to fit

1/2"(13 mm) dia. ID hose or 1/2"(13 mm) dia. straight

pipe threads. Use Teon* (PTFE) type tape when

threading straight pipe threads to tapered pipe threads.

Select two of the port adaptors supplied to match

your plumbing system. Flexible hose or tubing is

recommended instead of rigid piping at pump.

If you choose to use rigid piping, provide a short length

of hose between pipe and the pump to avoid noise and

vibration. Use clamps at both ends of hose to prevent

air leaks. NOTE: Intake hose should be at least

1/2"(13 mm) ID reinforced hose.

A “Pumpgard” 36400-Series 1/2"(13 mm) or 36200-

Series 3/4"(19 mm) in-line strainer should be installed

between pump and fluid supply to keep debris out of

system. Avoid any kinks or ttings which could cause

excessive restrictions. Remember to periodically clean

“Pumpgard” screens.

3. WIRING DC MODELS – In an easily accessible

location, install an “on-off” switch (Jabsco 44960-Series)

to control electricity to the pump. Turn the pump o

when not used for extended periods, or when fluid

supply is depleted.

Select wire size from chart below. Use total length of

wire from electrical source to pump and return. Chart

allows for 3% voltage drop. If in doubt, use next larger

wire size.

RECOMMENDED WIRE SIZES

Total Wire Length – feet (meters)

Pump 0-20 20-35 35-55

Voltage (0-6) (6-11) (11-17)

12 Volt #14 AWG #12 AWG #10 AWG

(2.5 mm2) (4 mm2) (6 mm2)

24 Volt #16 AWG #14 AWG #12 AWG

(1.5 mm2) (2.5 mm2) (4 mm2)

The electrical circuit should be protected with an over-

current protection device in the positive lead. See chart for

proper size. The pump circuit should not include any other

electrical loads. Black Wire from the motor is negative,

orange is positive.

If you are not familiar with applicable electrical standards,

have the unit installed by a qualified electrician.

After installation, check the voltage at the pump motor.

Voltage should be checked when pump is operating. Full

voltage must be available at the pump motor at all times.

4. SELF-PRIMING – Pump is self-priming. Vertical dry

lift capacity is 10 ft (3 m) (wet) 5 ft (1.5 m) (dry) min.

Be sure suction piping is airtight or pump will not

self-prime.

5. RUNNING DRY – Pump can run dry indefinitely without

damage.

6. CHEMICAL COMPATIBILITY – Fluids being pumped

must be compatible with the materials of construction.

Consult factory for Chemical Compatibility Guide. Pump

should be flushed with clean water or neutralizing

solution after each use to prolong pump life.

7. PRESSURE – Maximum continuous duty discharge

pressure is 40 psi with an ambient temperature no

greater than 130°F (55°C).

NOTE: If the system operating pressure exceeds

50 psi, an external pressure relief value should be

installed in the system.

8. TEMPERATURE – The maximum recommended fluid

temperature is 130°F (54°C). Minimum recommended

uid temperature is 45°F (7°C).

9. VISCOSITY – The maximum pumped fluid viscosity is

250 centipoise.

10. DUTY CYCLE – Motor and pump are designed for

continuous operation in a 130°F (55°C) environment

while pumping against 40 psi (2.8 bar) discharge

pressure. Beyond these parameters, an intermitted

duty cycle is recommended to maximize pump life. In

normal operation, motor case will get hot. Prolonged

contact with motor could cause a burn on human skin.

11. START-UP AND OPERATION – Check level of fluid in

supply tank. Open all valves in system. Switch pump

electrical circuit to “on” position. Flow will become

steady as air is bled from system. For pumps equipped

with pressure switch, close discharge valve after flow

becomes steady fluid stream. Pump should shut off

soon after closing valve. Pump is now ready for

automatic operation. Pump will start when valve is

opened and stop upon closure of valve. If pump is to

be inoperative for a considerable period of time, flush

pump with water, turn off electrical circuit to pump, and

bleed system pressure by opening discharge valve.

Pumps have thermal overload protected

motors. The motor will automatically shut off as temper-

ature rises due to an overload condition. If the motor

shuts o in this manner, turn o electrical supply to

pump. After a cooling o period, re-start pump.

Black

Orange

Black

Orange

Explosion hazard. Do not pump gasoline or 

other flammable liquids. To do so can cause 

an explosion resulting in injury or death.

WARNING

* TEFLON is a registered trademark of E.I. DuPont de Nemours and Company.

WARNING

Fire hazard. Wiring must comply with

applicable electrical standards and include

a properly sized fuse or circuit breaker.

Improper wiring can cause a re resulting

in injury or death.

EXPLODED VIEW

8. Check that ferrules are installed in upper housing and

O-ring is properly seated.

9. Install check valve assembly in upper housing and t

upper and lower housings together.

10. Align pumphead with motor and tighten four (4) screws

evenly using 25 inch pounds (2.8 Nm) of torque.

SWITCH REPLACEMENT

1. Remove power from pump. Relieve system pressure.

Disconnect inlet and outlet hoses.

2. Remove pressure switch cover and disconnect power

leads from switch.

3. Remove switch and switch diaphragm from pump by

removing two (2) switch mounting screws.

4. Replace switch diaphragm and switch. Reassemble in

reverse order.

5. Do not over tighten switch mounting screws.

OPTIONAL PORT KITS

30649-1004

1/2"Threaded

EPDM

30642-1004

90° - 3/4"

Hose Barb

Viton

30651-1004

90° - 1/2"

Hose Barb

Viton

SERVICE INSTRUCTIONS

PUMP DISASSEMBLY

1. Remove power from pump. Open discharge valve to

relieve system pressure.

2. Push port clips back and disconnect plumbing from

pump.

3. Remove the four (4) pumphead screws.

4. Rotate pumphead until cam/bearing set screw is visible

through drain notch.

5. Loosen cam/bearing set screw and slide pump o

motor shaft.

6. Separate upper housing, lower housing, and check

valve assembly as required.

PUMP ASSEMBLY

1. Install new outer piston in lower housing with piston

tops pointing away from motor.

2. Install new diaphragm in lower housing with the

molded O-ring seals facing away from motor.

3. Insert each inner piston through the diaphragm into

outer piston.

4. Turn each piston until fully seated.

5. Secure cam/bearing assembly to outer pistons using

18 inch pounds (2.0 Nm) of torque.

6. Slide lower housing on motor shaft. Align set screw

with motor shaft indentation.

7. Set screw MUST be positioned over shaft indentation

and secured tightly.

PARTS LIST

Model Upper Check Diaphragm Cam/Bearing PressureMotor

Housing Kit Valve Kit Kit Kit Kit Switch Kit

31820-0492 18910-4019 18911-7020 18912-3040 18913-0002 18919-0116 —

31820-0494 18910-4019 18911-7020 18912-3040 18913-0002 18919-1040 —

31821-0492 18910-4007 18911-7020 18912-3040 18913-0002 18919-0116 18916-0118

31821-0494 18910-4007 18911-7020 18912-3040 18913-0002 18919-1040 18916-0118

Bearing cover 7 not included in diaphragm Kit 3 .

1 2 3 4 5 6

Port Kits contain two ports with O-rings

30653-1004

3/4"Straight

Hose Barb

Viton

30654-1004

1/2"Straight

Hose Barb

Viton

Product specificaties

Merk:	Jabsco
Categorie:	Pomp
Model:	31820-0492

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