Fitting The Positioner To A Continuous Valve With Piston Drive - Burkert 1067 Manuel Utilisateur

3 INSTALLATION POSITIONER 1067
3.1.2 Fitting the positioner variant 2 to a continuous valve with piston drive
Arrangement
A continuous valve with piston drive can be used with variant 2 of the positioner with the external path-
measuring system (Fig. 14). The positioner is placed on the valve and screwed to it (Figs. 11 and 12).
The valve position is transmitted directly via the spring-mounted rod of the path-measuring system
(the linear potentiometer).
Fig. 11 Fitting to a 2731 continuous valve Fig. 12 Rear view of positioner (variant 2)
with piston drive
Assembly
Assembly of variant 2 of the positioner to a continuous valve with piston drive.
A set of add-on parts (NAMUR adapter, Fig. 13) is provided for assembling variant 2 of the positioner
to a piston valve (e.g. 2731). It consists of a mounting plate , two hollow bolts , three O-rings
and two cheese-head bolts M5 .
To assemble the positioner on a continuous valve with piston drive, the following steps should be
carried out (Fig. 13):
Place an O-ring in the recess of the mounting plate (drive side). In the case of a large version,
place a second O-ring on the other side of the mounting plate.
Put two cheese-head bolts M5 from the drive side through the 5-mm drillings in the mounting plate.
Screw the preassembled mounting plate to the two connection pieces of the valve drive with two
hollow bolts so that the lower connection piece is sealed by the O-ring.
Place an O-ring in the groove on the reverse side of the positioner.
Add the positioner to the mounting plate and screw it on with the two cheese-head bolts .
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