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Manual
00809-0500-4881
2. To comply with explosion-proof requirements, cover gasket (D) must be
3. Loosen screw and slide locking clip fully into gap between cover and ribs.
4. Retighten screw.
10.5
Replace tube fittings
The transmitter housings have special tube fittings that, if clogged or damaged, must be
replaced with the same type of fitting. The special tube fittings have alpha or numeric
codes etched on the fitting. Unetched tube fittings are standard ¼-in., stainless steel
fittings.
F type fitting
The F type fitting is a flame arrestor fitting used in all Rosemount OCX8800 hazardous area
housings. The flame arrestor fitting prohibits spark or flame conduction from the housing.
It requires a thread sealing compound (Loctite 567) and at least five threads engagement.
13 type fitting
This fitting is an eductor drive air fitting for the Rosemount OCX8800 hazardous area
housing. This is a ⅛-in. tube fitting with a built-in 0.013 inch restrictor orifice. It seats in a
threaded base port inside the housing.
R type fitting
The R type fitting is a reference air line fitting for the general purpose and hazardous area
transmitter housings. This is a ¼-in. tube fitting with a built-in 0.007-in. restrictor orifice.
10.5.1
Remove tube fittings
The Rosemount OCX8800 construction includes pipe thread sealant to seal fittings in all
ports that pass through to an outer wall of the instrument housing base. Use the following
instructions to loosen and remove tube fittings that are secured with pipe thread sealant.
WARNING
Burns
The pipe threads are bonded with a pipe thread sealant. The thread sealant softens at 450
°F (232 °C). The heated parts can cause severe burns.
Use heat resistant gloves when removing a damaged tube fitting.
Rosemount OCX8800C
compressed. For hazardous area applications, verify that the cover gasket is
compressed.
Maintenance and service
April 2023
263
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