UNI Geräte 10-EVS 24U Series, Operating And Mounting Manual

Page: 9 / 17

Operating and mounting manual (translation)
EVS..Ü
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220100.098-04 Page 9 /17 Release 08/2013
TM 3254
In addition to the general installation guidelines and the operation safety order, the following points must
also be observed:
DANGER!

Depressurised pipework system

Cooled medium

Emptied installation

Vent pipework systems containing corrosive, inflammable, aggressive or toxic
media

Have dismantling work carried out only by qualified staff (see point 2.3)
8.1 Replacement of wear parts
Shut down the valve as described in section 6.2.
Switch off and dismantle the solenoid drive as described in the operating manual of the solenoid drive.
DANGER!
After continuous operation, the solenoid drive may be hot! Danger of burns!
During the visual inspection, pay attention to the following points:
1. Damage to the valve seat (100).
2. Damage to the valve disc sealing (400)
3. Wear of the guide rings (206)
In case of damage to the valve seat, replace the whole magnetic valve.
If the sealing element becomes damaged (only applies to flange version Fig.1; thread version Fig. 2 (1” –
2”)), the spare parts kit should be used.
Flanged version
Fig. 1 4/10/40 EVS..Ü
Loosen hex. bolts (900/1) and remove housing flange (108). Remove upper part of
housing assembly (106). Remove bolt (902/1) together with SL retainer (949) or split
pin (912) and place solenoid core (207) together with spring bolt (210/1) and pressure
spring (503/1) aside on a clean surface. Then remove balance piston (220/1) together
with piston guide (221/1) from valve chamber (100) and separate the balance piston
from the piston guide.
Threaded version
Fig. 2 4 EVS..Ü 2 – 7 (1/4” – 3/4")
Replace the complete solenoid valve
Fig. 2 4 EVS..Ü 10 – 20 (1” – 2")
Unscrew upper part of housing assembly (106) from piston guide (221/1). Remove
bolt (902/1) together with SL retainer (949) or split pin (912) and place solenoid core
(207) together with spring bolt (210/1), pressure spring (503/1) and filter sieve (965)
aside on a clean surface. Then unscrew balance piston (220/1) together with piston
guide (221/1) from valve chamber (100) and separate the balance piston from the
piston guide.
Fig. 3 10 EVS 24Ü
Fig. 4 10/40 EVS 5Ü
Replace the complete solenoid valve
NOTICE!
Before assembly, replace O-rings (403/1/2) and lip-ring (404/1/3). Lubricate the piston
guide (221/1) with Staburags N32 lubricant.