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水ポンプ ARO PP10A-XXX-XXX-A SeriesのPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。ARO PP10A-XXX-XXX-A Series 12 ページ。 1" dry powder diaphragm pump

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GENERAL DESCRIPTION

The ARO diaphragm pump offers high volume delivery even

at low air pressure and a broad range of material compat-

ibility options available. Refer to the model and option chart.

ARO pumps feature stall resistant design, modular air motor

/ fluid sections.

Air operated double diaphragm pumps utilize a pressure dif-

ferential in the air chambers to alternately create suction and

positive fluid pressure in the fluid chambers, valve checks

ensure a positive flow of fluid.

This diaphragm pump was developed to address the unique

problems associated with pumping dry powders, which can

"pack out" inside the pump fluid chambers, if not kept in a

semi-fluid state.

This system incorporates the use of special valves to intro-

duce air or inert gas* into the fluid chambers simultaneously

to a pumping cycle, in a timed sequence which keeps the

powder in a fluidized state during the transfer process.

THEORY OF OPERATION

The main air distribution valve (252) is a double pilot actu-

ated four-way valve. It is a slave to the pump major air valve.

The distribution valve recognizes the signal from two pump

major air valve (259) ports (air dumps). These signals are con-

verted into alternating output pressure distributions, which

are injected into the fluid chambers during the pumping cy-

cle to fluidize the powder as the diaphragm moves through

the discharge stroke.

The flow of air supplied to the fluid chamber is controlled by

the (248) filter / regulator. Under normal operating condi-

tions, this is the primary control.

When air is supplied to the filter / regulator (248), the dis-

tribution valve directs the flow of air into the fluid chamber

that will dispense first for 3 to 8 seconds. The time delay then

supplies the start signal to open the main pump air supply

valve. When the pump diaphragm reaches the end of the

discharge stroke, it reverses direction. The distribution valve

then shifts and shuts off the fluidizing air to the first fluid

chamber as it applies a burst of air to the second fluid cham-

ber and fluidizes the powder in the second chamber.

The air induction orifice (76) increases the air velocity prior

to injection point because of the orifice and it prevents clog-

ging of the injector feed line.

NOTE: The restart valve (258) is a bleed valve which will stop

the pump and then restart the pump by re-initiating the time

delay cycle.

*NOTE: Use of other gases: Using only a gas to operate a 2"

pump can be rather expensive because of the high volume

needed. Separate air / gas inputs allow the fluidizing feature

of this pump to utilize special inert gas, such as Nitrogen or

Argon (air), if necessary and still allow use of standard com-

pressed shop air for the pumping function.

The ability to introduce special gas also means special ma-

terials could be injected through the fluidization lines. Ap-

plications may include such materials as colorants, foaming

agents, additives, neutralizers, etc.

AIR AND LUBE REQUIREMENTS

EXCESSIVE AIR PRESSURE. Can cause pump

WARNING

damage, personal injury or property damage. The

pump air supply must be limited to 50 psig (3.4 bar)

maximum inlet air pressure.

The air supply line or hose to the pump should be ade-

quately sized to carry a sufficient volume of air to the pump.

PP10A-XXX-XXX-A (en)

RELEASED 20/Feb/2019 12:56:22 GMT

The material inlet supply tubing should not be too small

or restrictive, which will inhibit material flow. The outlet

material volume is governed not only by the air supply,

but also by the material volume available at the inlet.

Air supply provided should be filtered to provide clean,

dry air. A filter capable of filtering out particles larger

than 40 microns should be used on the air supply. There

is no lubrication required other than the "O" ring lubricant

which is applied during assembly or repair.

If lubricated air is present, make sure that it is compatible

with the Nitrile "O" rings in the air motor section of the

pump.

NOTE: When using air for powder fluidization, make sure

it is filtered and very dry.

INSTALLATION

THE PUMPING SYSTEM MUST BE GROUNDED

WARNING

TO PREVENT STATIC DISCHARGE. THIS INCLUDES THE

PUMP AND ALL INPUT AND OUTPUT SUPPLY LINES

AND RELATED SYSTEM DEVICES AND ACCESSORIES.

FAILURE TO DO SO CAN RESULT IN EXPLOSION AND SE-

RIOUS PERSONAL INJURY.

SYSTEM GROUNDING

Consult local building codes and electrical codes for

specific requirements.

Must comply with all applicable Local and National

codes for such applications.

Grounding is accomplished through the ground lug

and strap provided on the pump. Keep the grounding

strap as short as possible.

Safe operating conditions are the responsibility of the

installer and operator.

Secure the diaphragm pump legs to a suitable surface

to avoid damage by excessive vibration.

OPERATING INSTRUCTIONS

START-UP

NOTE: PRIOR TO START-UP, MAKE SURE THE GROUNDING

INSTRUCTIONS WERE FOLLOWED.

1. Connect air supply to (263) main air supply control valve

(30 - 40 psig/ 2.1 - 2.8 bar).

2. Turn the air on.

3. Attach air (or gas) to (248) filter / regulator.

Do not apply excessive Fluidization Gas*

CAUTION

Pressure (refer to note under "Theory Of Operation").

4. Verify that the (253) flow control is fully open.

5. At (248), turn on air (or inert gas) supply. There will be a

3 to 8 second time delay, during which the pump will be

fluidizing any powder left in the pump from an earlier

dispense. This time delay will occur on all start-ups.

OPERATION AND ADJUSTMENT

NOTE: Powder type materials can vary in flow-ability and the

same settings may not work universally. Factors such as den-

sity and humidity can require changing the mixture of flow

rate and fluidization air and some experimenting should be

expected.

IMPORTANT: DO NOT TURN FILTER / REGULATOR (248) OFF.

Positive air (or gas) pressure must be supplied to the filter /

regulator to allow the pump to function. Powder will accu-

mulate in the fluid caps if the pump is not allowed to expel

excess material before the pump shuts down.

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