Pump-solutions-group Neptune Series 500 dia-PUMP How It Works Manuale Utente Scaricare il pdf

Variable Oil By-pass

stroke adjustment allows

better valve performance than variable linkage

designs. The valve checks have extra time to

seat even in heavy liquids since they are idle

during the by-pass portion of the suction

and discharge strokes.

How It Works

Hollow piston reciprocates within a cylinder.

Metering rod fits into the piston. Note the front

of the piston, or “nose”, has a reduced diameter.

The liquid seal forms at where the full diameter

of the piston contacts the cylinder.

When the piston moves forward, oil by-passes over

the reduced nose, through port to the center of

the piston and back to the gearbox. As the piston

continues forward, port is blocked by the tip of

the metering rod stopping the by-pass. Oil is

now pushed through port to the diaphragm.

Neptune

Series 500

“dia-PUMP”

The only pumps with

EZE-CLEAN

Valves

Hydraulically balanced Teflon

diaphragm eliminates diaphragm

stress associated with mechani-

cally flexed units.

EZE-CLEAN

Valves—

Cartridges can be removed

for cleaning without

disturbing the piping

to the pump.

Adjustable while

running through

100% of range by

micrometer dial.

Internal relief valve protects pump and motor.

Antisiphon spring provides

back pressure when pumping

against low pressure.

Vent—Refill mechanism

operates once per stroke.

Power train

operates in oil for

extended service.

Turning the micrometer dial moves the metering rod

and changes the pump capacity. When the metering

rod is moved in, the tip of the metering rod closes port

sooner in the stroke allowing for less by-pass and more pumping action.

Likewise, when the metering rod is moved out, the tip of the metering rod

closes port later in the stroke allowing more by-pass and less pumping.

The motion of the piston pushes and pulls the hydraulic fluid through port ,

into and out of the diaphragm chamber. The action of the fluid pushes and

pulls the diaphragm which, in turn, pushes and pulls chemical through port .

The action of the check valves controls the direction of the liquid.

Series 500 1
“dia-PUMP” 1

Sommario

Pagina 1 - “dia-PUMP”

2Variable Oil By-passTMstroke adjustment allowsbetter valve performance than variable linkagedesigns. The valve checks have extra time toseat even in

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