User Manual Q&AAnswer
Mar 03, 2025 - 02:17 AM
To install the EMERSON Enardo ES-665 Series Spring-Loaded Thief Hatch, follow these steps:
1. Ensure the tank is at atmospheric pressure before opening. A pressure build-up inside the tank can cause a spray to be emitted from the hatch if opened under pressure. Always use appropriate safety equipment, including safety glasses or shields, when working with a spring-loaded hatch.
2. Install the spring-loaded thief hatch on a mating API flange bolting circle of 16 bolt holes on a 10 - 3/8 in. circle for a normal 8 in. opening.
3. For installation of the hatch directly to the tank roof, place the base gasket on the bottom of the hatch flange and place it on the tank roof with the holes lined up. The slope on the roof should not exceed 5 degrees. Insert the 16 bolts from the bottom up by reaching inside the tank, through the hatch, and opening in the tank roof. Attach each nut to the bolt from the outside. Tighten all nuts in a circular manner and make sure the hatch is fastened securely. The bolt size is 5/8 in. The minimum starting torque should be 20 ft-lbs, and the maximum torque is 45 ft-lbs.
4. For installation of the hatch to a flanged pipe with an 8 in. API flange pattern, simply place the base gasket on the flanged pipe, line up the bolt holes, and place the hatch on top of the base gasket. Install nuts and bolts and tighten in a circular manner. Ensure the hatch is fastened securely.
Note: The EMERSON Enardo ES-665 Series Hatch is not necessarily grounded when installed on fiberglass reinforced plastic tanks unless the base is electrically bonded to the tank. To avoid personal injury or property damage resulting from the effects of a static electricity discharge from hatch components in a hazardous atmosphere or where the process fluid is combustible, electrically bond the base to the tank with a grounding strap.
Please refer to the complete instruction manual for more detailed information and illustrations on the installation process.
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