Installation; Construction And Assembly; Fitting The Positioner To A Continuous Valve With Membrane Drive (Namur) - Burkert 1067 Manuel Utilisateur

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:
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).
Fig. 7 Fitting to a 265 continuous valve with
membrane drive
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
Fasten pin using washer
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).
Flattened part on the shaft
of the path-sensor
Put lever with pin on to the path-sensor shaft. Then screw lever tight with screw
with cheese-head bolts
Positioner
Width: 125 mm
Height: 80 mm
Depth: 80 mm
to the positioner using 4 x M6
and nut to that position of the lever
to the lifting rod of the membrane valve.
POSITIONER 1067
External feedback/positional transducer
Diameter:
Height:
Fig. 8 Rear view of positioner (variant 1) with
lever
screws.
E-9-
approx. 65 mm
approx. 95 (115) mm
which corresponds with the
yellow mark
. Fasten carrier