APL-2 Series Limit Switch Box
Installation Operation & Maintenance Manual
Doc No. : HUMG-APL2-16 Rev0 Page 5 / 10 Valve Automation Leader HKC
6 Pre-Installation for
Ø Use in general service
Verify the nameplate to ensure correct model number, switch type, voltage before installation or use.
7 Installation
7.1 Mounting bracket
Caution ;
Where limit switch box or one of parts are to be moved, installed, disassembled, reassembled by a
hand, care must be taken not to cause injury by the harmful sharp edges of corners or rough surfaces
or residual electricity.
HKC shall supply a NAMUR VDI/VDE standards’ bracket and a fixing stuff for mounting on actuator. Bracket shall
be applicable to any type of valves ; manual valve, linear valve, pneumatic rotary valve.
Ø Ensure valve actuator alignment (fully open or closed).
Ø Place the mounting bracket on a horizontal plane of actuator
Ø Tighten the bolts enclosed in a box using a proper tool.
7.2 Mounting limit switch box
Note :
Prior to mounting the limit switch box must be checked for any damage.
Damaged parts must be replaced by original spare parts.
Caution ;
Do not attempt to work on limit switch box without first shutting off incoming power.
Limit switch boxes are available with a NAMUR shaft that enables direct attachment to actuator pinion without a
coupler. These shafts feature a 4mm wide tang that engages the 4mm slot in NAMUR actuators.
Ø Check to be sure the drive slot on the top of the actuator and the shaft of switch box are the same
direction.
Ø Insert the shaft of switch box carefully into the mounting bracket.
Ø Tighten the bolts enclosed in a box using a proper tool.
Ø Check the connection of shaft being assembled correctly.
7.3 Setting cam
The color of cams harmonized with position indicator help us to set the cams easily without wiring diagram.
Cams shall be easily set without tool. APL series cams are splined and can be setting lift up or push down the cam
from gear by hand in a seconds without setting tools. Self-locking, spring loading make never slip out of
adjustment.
Note :
Basically, cams shall be set by manufacturer before shipment.
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