11 Maintenance and cleaning
11.4 Examination of the O-ring
FLUXUS G831ST-HT
2021-06-01, UMFLUXUS_G831ST-HTV1-0EN
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11.4
Examination of the O-ring
The O-rings of the transmitter and the cable glands have to be checked regularly as well as after each opening of the
housing for possible damages. Porous or damaged O-rings have to be replaced. Cable glands with defective O-rings have
to be replaced.
Use original spare parts only. Store the O-ring replacement in a hermetically sealed and dark place.
Housing with increased safety
Defective O-rings have to be replaced.
11.5
Examination of the thread on the flameproof enclosure housing
The thread of the housing cover ensures a flameproof thread gap. Before closing the housing, the thread has to be
checked for damages. Housings with damaged threads has to be replaced.
Danger!
Risk of explosion when using the transmitter in explosive atmospheres
This may result in personal or material damage or dangerous situations.
→ The O-rings form part of the ignition protection and have to ensure tightness of the housing to
guarantee explosion protection.
Important!
O-rings of increased safety housings may only be replaced by qualified FLEXIM personnel.
Fig. 11.1: Transmitter
1 – housing with increased safety (Ex e)
2 – flameproof enclosure housing (Ex d)
3 – O-ring of transmitter
4 – thread gap (Ex db)
5 – housing cover
6 – sight glass
Danger!
Risk of explosion when using the transmitter in explosive atmospheres
This may result in personal or material damage or dangerous situations.
→ In order to maintain ignition protection, the thread gap of the flameproof enclosure housing has to meet
the specifications of the manufacturer. Damages or changes on the thread are not permitted.
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5
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