Service Instructions; Dismantling From Line System; Dismantling Of Valve / Wear Parts - SPX FLOW APV DELTA RG4 Instruction Manual

APV
APV_RG4_ATEX_UK-0_032018.indd
coupling
Modulating Valve
DELTA RG4-ATEX
Instruction Manual: UK-0
11. Service Instructions
Corresponding spare parts see
Spare Parts List: RN ATEX 01.170.1, RN ATEX 01.170.0
11.1. Dismantling from line system
Before start of assembly the operator must make sure that an
explosive atmohsphere does not exist (detection/measurement of
potential concentration of hazardous substances).
Alternatively, use spark-resistant tools!
1. Shut off line pressure and drain lines if possible.
2. Shut off compressed air and remove compressed air supply.
3. Shut off control current and separate connecting line.
4. Release flange connection (hex. screws pos. 6 and nuts pos. 7).
5. Release connection flange/housing (hex. screws pos. 4).
6. Dismantle modulating valve from line.
11.2. Dismantling of valve to replace wear parts
1. See chapter 11.1. pos. 1. - 6.
2. Loosen fastening screws (15) and take valve insert with positioner
and diaphragm actuator out of the housing (1). If necessary, screw
counternut
two fastening screws (15) into the bores provided at the valve yoke
(13) and push insert out of the housing.
3. Take valve seat (27) out of the housing (1).
valve shaft
4. Loosen coupling between actuator rod and valve shaft and pull
valve shaft (25) out of the housing cover (9).
5. Release hexagon screw (14) and take housing cover from the valve
yoke (13).
6. Remove seat seals (26) from valve shaft (cone).
Loosen head of coupling (22) and counternut (21) from
valve shaft (25).
Note: Observe adjusting dimensions between counternut
and valve shaft!
7. Remove housing seals (8) from valve seat (27) and from housing
cover (9).
8. Remove shaft seal (10) and seat seal (11) from housing cover (9),
remove bushing (12) from yoke (13).
9. Remove flange seals (3, 3.1) from housing (1) and dismantle
housing flange (5).
UK
18