
 
 
 
Use these instructions to mount a Topworx™ 
Valvetop D-Series Standard shaft discrete valve 
controller on 685/ATI Sliding actuator. 
 
 
WARNING
 
 
Avoid personal injury or property 
damage from sudden release of 
process pressure or bursting of parts. 
Before performing any maintenance 
operations: 
 
  
 Always wear protective clothing, 
gloves, and eyewear. 
 
  
 Do not remove the actuator from 
the valve while the valve is still 
pressurized. 
  
 
 
  
 Disconnect any operating lines 
providing air pressure, electric power, 
or a control signal to the actuator. Be 
sure the actuator cannot suddenly 
open or close the valve. 
 
  
 Use bypass valves or completely 
shut off the process to isolate the valve 
from process pressure. Relieve 
process pressure from both sides of 
the valve. 
  
  
  
 
 
  
 Vent the pneumatic actuator 
loading pressure and relieve any 
actuator spring precompression. 
  
  
  
 
 
  
 Use lock-out procedures to be 
sure that the above measures stay in 
effect while you work on the 
equipment. 
 
  
 Check with your process or safety 
engineer for any additional measures 
that must be taken to protect against 
process media. 
  
 
 
Refer to figure 1 and the parts list for mounting parts 
identification. Refer to the appropriate actuator 
instruction manual for actuator installation, operation, 
maintenance, and parts identification. 
 
 
 
1. Isolate the control valve from the process line 
pressure and release pressure from both sides of the 
valve body. Shut off all pressure lines to the actuator, 
releasing all pressure from the actuator. Use lock-out 
procedures to be sure that the above measures stay 
in effect while you work on the equipment. 
2. Attach the connector arm assembly (key 1) to the 
actuator stem block using the stud cont thd (key 2), 
hex nut (key 3), plain washer (key 4), lock spring 
washer (key 5) & hex nut (key 6) and tighten the 
fasteners. 
3. Attach and set the extension arm (key 7) as per the 
travel of actuator to the connector arm assembly (key 
1) using the plain washer (key 8) & socket head cap 
screws (key 9), and tighten the fasteners. 
4. Attach the bracket assembly (key 10) to the 
actuator using the plain washer (key 11), lock spring 
washer (key 12) & hex head cap screws (key 13) and 
tighten the fasteners. 
5. Attach the coupler shaft (key 18) to the bracket 
assembly (key 15) using the retainer ring. 
6. Attach the bracket assembly (key 15) using the flat 
head screws (key 16) & hex nut (key 17) and tighten 
the fasteners. 
7. Attach the instrument to the mounting bracket 
using the hex head cap screws (key 14). 
Visually adjust the instrument so that the instrument 
shaft centred and engage with 
coupler shaft (key 18). 
8. Attach the lever arm (key 20) to the coupler shaft 
using the plain washer (key 21), socket head cap 
screw (key 22) & square nut (key 23) and tighten the 
fasteners. 
9. Attach the rotary pin arm (key 24) to the extension 
arm (key 7) using the hex jam nut (key 25), external 
tooth lock washer (key 27) & hex nut (key 28) and 
tighten the fasteners. 
10. Insert the rotary pin arm (key 24) to the lever arm 
(key 20) using the external retaining ring (key 26). 
11. Setup and calibrate the Valvetop D-Series 
discrete valve controller described in the Valvetop 
D-Series discrete valve controller instruction manual 
or quick start guide. 
For additional information concerning mounting, 
setup, calibration, and maintenance of the Valvetop 
D-Series discrete valve controller, refer to appropriate 
instruction manual. 
 
 
.com 
 
Mounting Instructions 
  
 
D103991X012
 Rev. B 
June 2014 
Valvetop D-Series Standard Shaft
Discrete Valve Controller on
685/ATI Sliding Actuators