21
APV_SWmini4_GB-2_042020.indd
Single Seat and Change-over Valve
DELTA SWmini4
Instruction manual: GB – rev. 2
GB
APV
14. Service Instructions - Actuator
The item numbers refer to the actuator spare parts lists:
RN 01.054.88
14.1. Disassembly
Attention!
Before starting the disassembly, see to the valve design NC or NO.
1.
Release hex. screws (5) and remove actuator cover (2) or adapter
SWmini4 (21) from actuator (13).
2.
Remove quadrings (6) from the grooves.
14.2. Assembly
1.
Provide quadrings (6) with a thin grease layer and press themin the
seal grooves.
2.
Fasten actuator cover or SWmini4 adapter on the actuator by
means of the hex. screws (5).
Attention!
Observe valve design NC or NO.
-
short projection of piston rod = design NC
-
long projection of piston rod = design NO
14.3. Change of valve position NC/NO
By turning the actuator by 180°, the required design NC or NO can
be determined.
NC
(FS) = normally closed (air-to-raise, spring-to-lower)
NO
(FH) = normally open (air-to-lower, spring-to-raise)
Crucial for the reconstruction is the assembly of the actuator cover.
Assembly of actuator cover:
- short projection of piston rod = design
NC
(FS)
- long projection of piston rod = design
NO
(FH)
short projection
long projection
actuator
piston rod
quadring
quadring
actuator lid
5
