![Spirax Sarco ABV21i Installation And Maintenance Instructions Manual Download Page 12](http://html1.mh-extra.com/html/spirax-sarco/abv21i/abv21i_installation-and-maintenance-instructions-manual_1347905012.webp)
IM-P405-46
EMM Issue 5
12
The air supply is switched on by the solenoid valve, causing two pistons in the actuator to
move apart against spring pressure.
Racks attached to the pistons turn the actuator pinion and shaft, opening the valve fully.
On release of the air pressure, the springs return the valve to the closed position.
Fig. 5
Solenoid override screw
Use the '3/2' adapter plate for this application
Solenoid can be repositioned if required
Blanked off (use the plug supplied)
Air inlet port (
¼
" BSP)
'O' ring
Cable connector
Not used
After installation or maintenance ensure that the system is fully functioning. Carry out tests
on any alarms or protective devices.
4. Commissioning
5. Operation
Summary of Contents for ABV21i
Page 24: ...IM P405 46 EMM Issue 5 24...