PFT ROTOR/STATOR RANGE

PFT offers various stator sizes for virtually any application. Very few people are aware of how stator names are composed. Let's look at anexample, D 6–3.

The letterDstands for the stator diameter.
The number6designates the eccentricity and the number3after the semicolon, the number of pressure stages.

Stator diameter: A ~ 40 mm, B ~ 51 mm, C ~ 59 mm, D ~ 90 mm, R ~ 114 mm, T ~ 125 mm
Stator abbreviations: wf ~ maintenance-free, PIN ~ anti-rotation device, L ~ anticlockwise rotation

TWISTER design (1)
Steel edges support the rubber and prevent deformation in case of pressure.

Cylindrical design (2)
Deformation in the rubber leads to higher wear and quickly impacts pressure stability = holding pressure in the chambers; reflux occurs in the stator.

Friction causes heat and this has a negative impact on the rubber of the stator. It is therefore important to reduce the heat in the stator by using a suitable rubber compound and through fast heat dissipation.

TWISTER design (1)
A lower wall thickness and larger surface area dissipate the heat in the stator in an improved way.

Cylindrical design (2)
Irregular rubber thicknesses prevent fast heat transmission.

Maintenance-free stator (1)
Maintenance-free stator "Ready-to-go" – pre-stressed for immediate use.

Tensible stator (2)
"Do-it-yourself" – the tension is adjusted using screws; retightening is possible to suit your needs. This means that this stator can be tuned by a professional to match the application or the material.

Using this approach you can easily convert the pump performance for your controllable machine.

For example:
What is the delivery performance in litres per minute at 250 rpm for rotor/stator D 6–3

Example calculation:
20 l/min = 400 rpm
20 : 400 = 0.05
0.05 x250=12.5 l/min