Blagdon Pump B25 Посібник з обслуговування та експлуатації - Сторінка 5

Переглянути онлайн або завантажити pdf Посібник з обслуговування та експлуатації для Водяний насос Blagdon Pump B25. Blagdon Pump B25 12 сторінок. Air operated double diaphragm pump
Також для Blagdon Pump B25: Посібник з обслуговування та експлуатації (16 сторінок)

Друкувати сторінку

PRINCIPLE OF PUMP

OPERATION

This ball valve type diaphragm pump is

design. The inner side of one diaphragm

chamber

alternately

pressurised

simultaneously exhausting the other inner

chamber. This causes the diaphragms, which are

connected by a common shaft secured by plates

to the centres of the diaphragms, to move in a

reciprocating

action.

(As

performs a discharge stroke the other diaphragm

is pulled to perform the suction stroke in the

opposite chamber.) Air pressure is applied over

the entire inner surface of the diaphragm while

liquid is discharged from the opposite side of

the diaphragm. The diaphragm operates in a

balanced condition during the discharge stroke

which allows the pump to be operated at

discharge heads of over 200 feet (61 meters) of

water.

For maximum diaphragm life, keep the pump as

close to the liquid being pumped as possible.

Positive suction head in excess of 10 feet of

liquid (3.048 meters) may require a back

pressure

regulating

device

diaphragm life.

Alternate pressurising and exhausting of the

diaphragm chamber is performed by an

externally mounted, pilot operated, 2 way type

distribution valve. When the spool shifts to one

end of the valve block body, inlet pressure is

applied to one chamber and the other diaphragm

chamber exhausts. When the spool shifts to the

opposite end of the valve body, the pressure to

Lubricator

Filter/Regulater

Installation Guide

Fig. 1

HG-CF-921 Rev. L - 28.07.05

the chambers is reversed. This alternating

movement of the spool inside the valve body is

controlled by a pilot air pressure signal held

against the diaphragm shaft, between seals in the

diaphragm shaft bushes. This signal is released,

triggering the movement of the spool, when pilot

holes in the diaphragm shaft align with the held

pilot signal, sending the signal to exhaust, which

while

in-turn causes a pressure imbalance around the

spool, sending it to the opposite end of the valve

body. This simultaneously sends inlet pressure

to the opposite chamber.

one

diaphragm

The chambers are connected by manifolds with a

suction and discharge ball valve for each

chamber, maintaining flow in one direction

through the pump.

INSTALLATION

The typical installation shown in FIG. 1 is only a

guide to selecting and installing system

components. Your installation will depend on

the type of fluid being pumped and your

application needs. To reduce the risk of serious

bodily injury and damage to property, never use

fluids in this pump which are not compatible

with the wetted components. Contact your local

maximize

distributor or the manufacturer for system design

assistance & compatibility if necessary.

Mount the pump in an upright position. Failure

to ensure an upright position may result in loss

of or poor priming characteristics. Ensure the

pump is securely mounted to avoid movement

and possible risk of bodily injury.

PRESSURE

pressure at the discharge outlet as the air

The pump delivers the same

pressure applied at the air inlet (unless pump is

configured as a 2:1 ratio model).

NOTE: Pressure Regulator (H) should be

installed where air supply could exceed 125

psi.

SAFETY

Your BLAGDON PUMP is a high

performance unit capable of achieving

high outputs at high efficiencies. However, as

is common with pneumatic equipment, the

pump efficiencies is reliant upon the air being

clean, dry and filtered. Failure to comply with

these requirements may lead to loss of

performance and reduced component life and in

extreme cases, permanent damage to the pump.

To avoid leaks, ensure that all fluid connections

are tight. The use of PTFE thread tape correctly

applied should be used to ensure 100% leak

proof connections. Failure to ensure 100%

sealability of the suction connection could

adversely affect suction performance.

If you are pumping hazardous fluids, or

operating the pump in an enclosed area, it is

essential that the exhaust from the pump is

piped away to a safe location. When pumping

hazardous fluids the above instructions must be

adhered to in order to ensure safe operating

procedures.

(Under

certain

conditions the failure of internal components

can lead to the pumped fluid being exhausted

via the pump exhaust outlet).

WARNING

NEVER place your hands over or near the

pump suction inlet. Powerful suction could

cause serious bodily injury.

FLUSH THE PUMP

tested with water containing an oil-based rust

inhibitor. If this solution could contaminate or

react with the fluid you are pumping, flush the

pump thoroughly with a solvent/detergent to

clean internal components.

detergent must be compatible with the pump

materials of construction. Care should be taken

to flush the pump each time it is disassembled

for maintenance or repair.

CAUTION

All BLAGDON PUMPS are

built lubricated with grease during assembly

and need no further lubrication. If the use of oil

cannot be avoided, this will not present any

problems. A light No. 2 class lithium grease is

recommended. Other grades may cause the Air

Logic System to operate intermittently, thereby

causing a loss of output and failure to operate.

Other seals are available for "clean room"

conditions

If the pump accelerates or is running too fast

due to a lack of fluid, then stop it immediately

by shutting off the air supply. A dry pump will

accelerate to a high speed causing wear to

elastomers.

If the fluid you are pumping tends to dry up or

set when it is not moving, then flush the pump

as often as necessary to prevent the fluid from

drying in the pump. Drain the pump thoroughly

before storing.

If feasible, invert pump to allow any fluid to

drain from the non-return valves

operating

This pump was

The solvent/

Page 5