Burkert Type 1067 - Manual (Page 61)

POSITIONER 1067
E-9-
3 INSTALLATION
3.1 Construction and assembly
The 1067 positioner can be fitted to various continuous valves. Depending on the valve type either
variant 1, with an internal feedback/positional transducer (a rotary potentiometer) or variant 2 or 3, with
an external feedback/positional transducer (a linear potentiometer) is used (see section 2.3).
Main dimensions:
Positioner External feedback/positional transducer
Width: 125 mm Diameter: approx. 65 mm
Height: 80 mm Height: approx. 95 (115) mm
Depth: 80 mm
3.1.1 Fitting the positioner to a continuous valve with membrane drive (according to NAMUR)
Arrangement
In the case of a continuous valve with membrane drive, device variant 1, with an internal feedback/
positional transducer (a rotary potentiometer) should be used. The positioner is screwed on to what is
termed the «lantern» of the membrane drive (Fig. 7). Transmission of the valve position to the internal
feedback/positional transducer is achieved by means of a lever conforming to NAMUR (Fig. 8).
Assembly
A mounting elbow (Fig. 10) is provided for assembling variant 1 of the positioner to a continuous valve
with membrane drive (e.g. 265). The following steps should be carried out:
Screw mounting elbow "
1" to the positioner using 4 x M6 "10" screws.
Fasten pin " 2" using washer "7" and nut "8" to that position of the lever "4" which corresponds with the
desired lift (the lever is marked in mm of lift).
To avoid a TURN POT error (dead zone of the path-sensor), position the shaft of the path-sensor of
the positioner so that during the whole lift of the actuator the flattened part never passes in front of the
yellow mark (see following picture).
Put lever " 4" with pin on to the path-sensor shaft. Then screw lever tight with screw "9". Fasten carrier
" 3" with cheese-head bolts "6" to the lifting rod of the membrane valve.
Fig. 7 Fitting to a 265 continuous valve with
membrane drive Fig. 8 Rear view of positioner (variant 1) with
lever
Flattened part on the shaft
of the path-sensor
yellow mark