Mounting
20 - EN FEX300, FEX500 SM/FEX300/FEX500/FM/CSA-EN
4.8 Process sealing (Canada)
IMPORTANT (NOTE) - Devices with “Process sealing” in Canada
If the devices are used in Canada in hazardous areas, Class II, Groups E, F and G, the
maximum surface temperature must not exceed 165°C (329 °F).
All cable entries and cable outlets must be sealed at a distance of 18 inch (457.20 mm) from
the device using “Conduits”.
Usually, electrical supply lines to a device are laid in a pipeline system with the appropriate
sealings (Conduits) to comply with the North American Standard.
This type of installation, however, involves the risk that, in the event of a measuring electrode in
the flowmeter sensor becoming leaky, fluid can reach into the device and then further advance
through the pipelines that contain the electrical supply cables.
In order to prevent this, the corresponding sealings (Process Seals) conforming to the
requirements in acc. with ANSI/ISA 12.27.01 must be provided.
This electromagnetic flowmeter is designed as a “single seal” unit.
If the device is installed conforming to the regulations in accordance with ANSI/ISA 12.27.01,
the device's operating data are limited to the following values, taking into account the limits of
the corresponding lining:
Max. permissible operating temperature in acc. with ISA12.27.01
Lining material Nominal
diameter
Max. operating temperature in acc. with
ISA12.27.01
Hard rubber DN15 ... 400 0 °C ... 90 °C (32 °F ... 194 °F)
DN450 ... 2000 Max. 90 °C (194 °F)
Soft rubber DN50 ... 400 0 °C ... 60 °C (32 °F ... 140 °F)
DN450 ... 2000 0 °C ... 60°C (140 °F)
PTFE DN10 ... 400 -40 °C ... 170 °C (-40 °F ... 338 °F)
DN450 ... 1000 Max. 130 °C (266 °F)
Thick PTFE DN10 ... 400 -40 °C ... 170 °C (-40 °F ... 338 °F)
PFA DN3 ... 200 -40 °C ... 170 °C (-40 °F ... 338 °F)
ETFE DN25 ... 400 -40 °C ... 150 °C (-40 °F ... 302 °F)
DN450 ... 1000 Max. 130 °C (266 °F)
Ceramic carbide DN25 ... 400 0 °C ... 80 °C (32 °F ... 176 °F)
DN450 ... 1000 0 °C ... 80 °C (32 °F ... 176 °F)
Max. permissible nominal pressure rating in acc. with ISA12.27.01
Model Nominal diameter Max. nominal
pressure
Lining material
FEH
DN10 ... DN40 Class 150 All
DN50 ... DN100 Class 150 All
FEP
DN10 ... DN50 Class 150 All
DN65 ... DN400 Class 300 All
DN65 ... DN400 Class 600 Hard rubber
DN450 ... DN2600 Class 300 All
The operating temperature of the devices is determined by the fluid temperature and the
ambient temperature.