Precision Power PC400.4 Spécifications télécharger pdf (Page 3)

About FPP Meters

We thank you for purchasing an FPP METERS product for

liquid measurement service. FPP

METERS, formerly Fluid

Power Products, is now a trade name of Tuthill Transfer

Systems. FPP was established in 1980. Since its inception,

the company has been dedicated to manufacturing cost-

effective, high performance flow metering devices for petro-

leum, industrial, commercial and municipal service.

Our facilities include computerized order entry and inventory

control, so that you are assured of accurate and prompt de-

liveries. Furthermore, our production personnel ensure that

each order, regardless of size, receives individual attention.

Constant attention to new product development and produc-

tion design, our high standards of manufacture and final

testing are the reasons why FPP

METERS meet your most

demanding requirements. With the ‘Waveform’ oval gear

(2003 patent) meter accuracy is better than ever before.

Our meters are used in batching, blending, process control

and to dispense fluids in liquid handling facilities throughout

the World. Service includes gasohol blends, bio-diesel and

special formulation racing fuels.

Principle of Operation

Positive Displacement meters have a measuring chamber,

where inlet & outlet are separated by rotors, a rotating ele-

ment or sliding vanes. As the liquid passes through the flow

meter, it causes the rotors/element/vanes to turn, which

forms the basis for volumetric measurement.

The Oval Gear metering principle is based on two elliptical

(oval) gears, which turn on center on two horizontal shafts

inside a measuring chamber formed by two overlapping cyl-

inders. The oval gears have meshing teeth along their en-

tire circumference, ensuring that the gears will maintain cor-

rect position in relation to each other at all times, without the

use of timing gears.

The volume being transferred from the inlet to the outlet side

(= volume measured), forms between the oval gear and the

side of the measuring chamber, alternately in the upper and

the lower half of the measuring chamber. In a full 360° rota-

tion of the gears, four such known volumes are released to

the downstream side of the flow meter.

The flow meter is 100% gland-less with static O-ring seals

only. Internal magnets are detected by a sensor (pulser)

mounted in flow meter case. The pulser generates an elec-

trical on/off signal, which can be used to drive a signal con-

ditioner or an electronic register.

With precision machining and close internal tolerances, the

slippage is minimal for superior linearity (accuracy) over a

broad turn-down ratio. Oval gear meters are largely unaf-

fected by changes in liquid viscosity. In TM Series meters

we expect a shift of no more than 2-4% due to variations in

liquid viscosity between 1 and 100 cSt. As the viscosity

increases further, there is no noticeable change.

To ensure optimum linearity (accuracy), TM Series meters

should be field calibrated correct for individual meter varia-

tions, liquid viscosity and local system/operational factors.

Fluid Compatibility

FPP Meter flow meters are available in anodized aluminum

and stainless steel, with a variety of rotor types and seals, to

ensure compatibility with a broad range of liquids. If in doubt

about compatibility with a a specific fluid, please refer to

FPP Technical Manual. If that publication does not provide

a clear answer, please consult with your authorized FPP

Meter distributor, or Customer Care at the factory.

While most refined petroleum products can be handled with

the same flow meter, some require different rotors and/or

seals. Do not change service liquid, without consulting with

your authorized FPP Meter distributor.

1 . 3

TM Series, Principle of Operation

 Only 2 moving parts.

 Patented ‘Waveform’ oval gears = sustained accuracy with a minimum of maintenance.

 No metal-to-metal contact in measuring chamber or in bearings.

 The lowest differential pressure values amongst rotary PD meters.

=> Lower Cost of Ownership!

TM04A

with RS pulser

= 1 magnet in 1 gear

TM04A

with HE pulser

= 4 magnets in gears

TM02D

with HE pulser

= 2 magnets in 1 gear

1 2 3 4 5 6 7 8 ... 23 24

Commentaires sur ces manuels

Pas de commentaire

Precision Power PC400.4 Spécifications Page 3

Commentaires sur ces manuels

Produits connexes et manuels pour Récepteurs de médias en voiture Precision Power PC400.4