ES-817 Rev. D
Copyright 2020. This document and all information herein are the property of Dresser LLC
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4
Flame Proof and Dust Ignition Proof Requirements:
4.1
General
The 1/2-inch NPT fittings must be torqued until they are wrench tight. The main housing cover
must be clean and free of corrosive products.
The SVI3 chassis must be securely electrically connected to earth ground. Ground screws/lugs
are provided on the enclosure in the following two locations as shown:
(Shown with cover removed)
4.2
Entries and Cable Glands
Certified cable glands are required based on the hazardous area the device is installed in. The
½” NPT conduit plug supplied with the SVI3 was certified as part of the product.
4.3
Main Cover Installation
Verify that cover seal (o-ring) is properly installed into the groove in the cover. The cover must
be screwed into the housing until it contacts the top-surface of the housing (i.e. it is “metal to
metal” with the housing). Once the cover is installed, ensure that the cover lock screw is
secured. This maintains the ingress protection level and integrity of the flameproof enclosure.
Ground Screw/Lugs
