CENTORK QUARTER TURN AND LINEAR POSITIONER CHARACTERISTICS  
  CENTORK LINEAR POSITIONERS  
  CENTORK ROTARY POSITIONERS  
  CENTORK POSITIONER OPTIONS/ACCESORIES  
  CENTORK POSITIONER APPLICATIONS  
 
CENTORK LINEAR POSITIONERS
   CENTORK LINEAR POSITIONERS,EXTERNAL SPRING PR-120 SERIES

The external spring linear positioners are the ideal complement to adjust, according to a pneumatic or electric control signal, the linear movement of a conventional pneumatic cylinder.
The 120 Series linear positioner valve is mounted on a subplate directly onto any pneumatic cylinder and over.
The retro – feed spring, together with its assembly accessories, are supplied adapted in length to the stroke of each cylinder.


1701.PR120: Direct Linear Pneumatic positioner
1701.PR120R: Reverse Linear Pneumatic Postioner
1701.PR121: Direct Linear Electro-Pneumatic positioner
1701.PR121R: Reverse Linear Electro- Pneumatic Postioner

COMMON CHARACTERISTICS FOR THE 4 MODELS
Main air suply 3 - 10 bar
Linearity >99% full range
Hysteresis <0,5% full range
Repetitivity < 0, 3% full range

Full range = stroke
Please check corresponding technical sheets.

 
   CENTORK LINEAR POSITIONERS, CHARACTERIZABLE CAM PR-730 SERIES

The characterizable cam linear positioners converts the conventional pneumatic cylinder linear movement into a turning movement suitable to the 730 series positioner valve, to be applied to the quarter turn control adjustment. The cylinder position is transmitted to the positioner by mean of a cam.
Such cam can be shaped(mechanically carved), in such a way that the cylinder response is not linear, offering the flexibility to adapt the cylinder/actuator performance to the needs of the valve on which it is mounted. The retro – feed cam, together with its assembly accessories, is supplied in length to the stroke of each cylinder.
This is a rather compact assembly. A linear, direct or inverted adjustment, can be obtained according to the cam carving, or depending on the customer’s specifications.

1730.PR730: Pneumatic Rotary Positioner
1731.PR731: Electro-Pneumatic Rotary Positioner (4-20 mA imput signal)
1735.PR735: Electro-Pneumatic Rotary Positioner (0-10 V imput signal)
1733.PR733: Electro-Pneumatic Rotary Positioner
intrinsicallly safe Eexia II CT6

COMMON CHARACTERISTICS FOR THE 2 MODELS
Main air suply 3 - 10 bar
Linearity >99% full range
Hysteresis <0,5% full range
Repetitivity < 0, 3% full range

Full range = stroke
Please check corresponding technical sheets.