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REV. STV20110519
4.
MAINTENANCE / SERVICE
4.1 Special tools required
No special tools are required for operation and ordinary maintenance of the valve.
For maintenance of the pneumatic actuator
12
(1/2”),
25
(1”) and
38
(1 ½”) a special tool and
instruction are needed. It is recommended that the pneumatic actuators
12
(1/2”),
25
(1”) and
38
(1 ½”) are returned to Steridose for repair. Pneumatic actuators
51
(2”) and
76
(3”) are sealed
and not serviceable. All plastic Pneumatic actuators and manual stainless steel actuators are also
sealed and not serviceable.
4.2 Preventive Maintenance Schedule
Table 1 shows the recommended intervals for inspection of the valve components:
Table 1: Intervals of inspection
Preventive maintenance
Section in
manual for
reference
Interval
Leakage inspection
4.2
Daily
Sterivalve diaphragm inspection
4.4
see 4.4.1
Sterivalve pneumatic actuator inspection 4.3.2
12 months
Sterivalve housing inspection
4.2
12 months
Pneumatic tubing
4.3.2
12 months
Electrical cables
4.3.2
12 months
Clamps frequently opened should be greased at the thread with “Molykote 111” regularly.
Negligence may result in damage to threads.
The wetted surfaces of the valve housing should be checked for signs of corrosion and
discoloration.
