Badger Meter SRD/SRI Valve Positioners - Manual (Page 19)

MOUNTING TO LINEAR
ACTUATORS
NAMUR Mounting, Left Hand
Applicable to actuators with cast yoke or pillar yoke according
to NAMUR (DIN IEC 534-6)
Mounting the positioner with pneumatic connections on the
left side and electrical connections on the lower right side
Figure 13: NAMUR mounting
Attach the positioner to the actuator at the left using the
mounting bracket and feedback lever for a NAMUR mount
Use:
• Attachment kit EBZG -H for a cast yoke, or
• Attachment kit EBZG -K for a pillar yoke
The side outputs I (or I and II) are used The rear output I is
closed by means of a lock screw 522 588 013
Pneumatic connections: Do not use Teflon tape for sealant
The fine fibers could disturb the function of the SRD Use only
Loctite® #243 for sealant and apply it only to male thread
Screw-type glands for electrical connections are positioned on
the lower or right side Any unused threaded holes are closed
by plugs
Preparation of the Positioner
Rotate the shaft 9 so that the flat on the shaft stub is
perpendicular to the arrow 26 on the housing (for details, see
“NAMUR Mounting Dimensions, Left Hand” on page 20 )
Fasten the feedback lever A to the shaft by means of spring
washer and nut M8
Figure 14: Positioner preparation
Preparation of the Actuator
Screw the carrier bolt to the stem connector and lock it by
means of a counter nut
A carrier bolt with an adjustable length is used to be able to
screw on various coupling pieces
Figure 15: Actuator preparation
It consists of a stud S, which is screwed into the coupling
piece K (with 3 mm Allen key) and locked with a lock nut
M6 The threaded sleeve H is screwed onto it and locked
with a lock nut M6 Make sure that the bolt is adjusted to the
right length!
Fasten the mounting bracket to the right side of the yoke
For a cast yoke, use a screw M8 x 30; for a pillar yoke, use two
U-bolts and two nuts
Mounting of the Positioner
Fasten the positioner to the mounting bracket using two
spring washers and two screws M8 x 80
The carrier bolt B is in the slot of the feedback lever A and the
compensating spring F touches the carrier bolt
Figure 16: Positioner mounting
Adjust the arrangement according to the following
procedure before fixing At an actuator position in the
middle of travel range, the feedback lever position should
be perpendicular to the actuator stem and the angle range
should be between −10…10° and −45…45°
Fasten the positioner to the mounting bracket so that a
suitable angle range is selected Make the pneumatic and
electrical connections after adjusting the position
Page 19
Mounting to Linear Actuators
August 2014 POS-UM-00009-EN-02