EMERSON Enardo ES-665 Series Spring-Loaded Thief Hatch Instruction Manual

EMERSON Enardo ES-665 Series Spring-Loaded Thief Hatch

WARNING
Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion, fire and/or chemical contamination causing property damage and personal injury or death. Fisher™ spring-loaded hatch must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations and Emerson Process Management Regulator Technologies Tulsa, LLC instructions. Failure to correct trouble could result in a hazardous condition. Call a qualified service person to service the unit. Installation, operation and maintenance procedures performed by unqualified person may result in improper adjustment and unsafe operation. Either condition may result in equipment damage or personal injury. Only a qualified person shall install or service the spring-loaded hatch.

Figure 1. Enardo ES-665 and Enardo ES-665-L Series Spring-loaded Thief Hatch.

Introduction

Scope of the Manual
This Instruction Manual provides instructions for installation, startup, maintenance and parts ordering information for the Enardo ES-665 Series spring-loaded hatch.

Specifications
The Specifications table lists the specifications for the Enardo ES-665 Series spring-loaded hatch. Specification is stamped on the nameplate attached to the hatches.

• Available Constructions
  See Product Description

• Performance
  Tight to 0.10 SCFH at 90% of set pressure, at 68°F / 20°C

• Bolt Pattern
  Nominal 8 in. Flange API Round

• Pressure Setting Range(1)
  4, 6, 8, 12, 16, 24 and 32 oz./sq. in.

• Vacuum Setting Range(1)
  0.4, 0.9 and 3.5 oz./sq. in.

• Temperature Range
  -4 to 140°F / -20 to 60°C
  Note : Use Fluorosilicone gaskets for lower temperatures to -40°F / -40°C.

• Construction Material
  Casting : Aluminum (non-sparking)
  Pressure Gasket : HNBR (standard), Fluorosilicone, Viton® and Ethylene Propylene Diene Monomer (EPDM)

• Vacuum Gasket: Fluorosilicone (standard), Viton® and EPDM Food Grade

• Optional Equipment
  Base Gasket, Bolt Set, Non-Corrosive Coating, Bonding Strap

• Approximate Shipping Weight
  Model Enardo ES-665 : 25 lbs / 11.3 kg.

Product Description

The Enardo ES-665 Series is the next evolution in spring-loaded thief hatch design with precisionmanufactured internal components, a base and a cover. It is intended for use in applications where ultra-tight sealing is required such as sour crude/gas or where strict environmental emissions standards are enforced.

Enardo ES-665 Series Spring-Loaded Hatch Model

• Model Enardo ES-665 is a spring-loaded thief hatch designed with a round base and cover. It is intended for use on steel and fiberglass storage tanks which require a tighter seal for reduced vapor loss.
• Model Enardo ES-665-L is a spring-loaded thief hatch designed with a long basin and cover. The long basin serves as a thief shelf. The design also includes an inclining base to keep the basin level. This is a long configuration.
• Model Enardo ES-665-B is a spring-loaded thief hatch designed with a round base and cover. This hatch is provided with a bleeder attachment making it possible to relieve tank pressure before opening the hatch. This bleeder prevents a spray from discharging when the hatch cover is raised. This is a bleeder vent configuration.
• Model Enardo ES-665-LB is a spring-loaded thief hatch designed with a long basin and cover with an inclining base and bleeder attachment. This is a long and bleeder vent configuration.

Principle of Operation
Enardo gauge hatches are designed to control evaporation losses and protect tanks against excessive pressure or vacuum. When the storage tank pressure is above the setpoint of the hatch, the center assembly opens to relieve excess pressure. When the overpressure has dissipated, the center assembly reseats onto the base to provide tight seal.

Tagging Information
The Enardo ES-665 Series hatch is shipped with a tag already attached to the hatch. For retrofit Enardo ES-665 Series center assemblies, the order includes a tag, stainless steel wire and a drive screw. User has the option to attach the tag with wire to the existing hatch lid or to drill a small hole and attach tag with a drive screw on the top of the lid. Examples of tag locations are shown in Figure 2. Location 1 is the hinge pin on the back of the hatch and location 2 is the holes in the ears on the front of the hatch.

Installation

CAUTION
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. Springs are energy storage devices and are dangerous if handled improperly. Always use appropriate safety equipment including safety glasses or shields anytime you are working with a spring-loaded hatch.

WARNING: Ensure hardware and tools used during installation do not interfere with or exert upward forces on the hatch base.

Complete Enardo ES-665 Series Hatch

WARNING
The 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 grounding strap.

1. 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.
2. For installation of the hatch directly to the tank roof, place the base gasket on the bottom of the hatch flange and place on the tank roof with 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.
3. 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 bolt holes and place hatch on top of base gasket. Install nuts and bolts and tighten in a circular manner. Ensure hatch is fastened securely.

Retrofit Enardo ES-665 Series Center Hatch

The Enardo ES-665 Series center assembly can also be installed as a retrofit into an existing Enardo 660 or Enardo ES-660 Series hatch by following six simple steps.

1. Open existing Enardo 660 or Enardo ES-660 Series hatch by pushing down on lid and opening latch.
2. Remove the existing center assembly by pressing the center assembly inward against the spring pressure and turning one quarter rotation to the right or left.
3. Remove existing center assembly and associated pressure spring.
4. New Enardo ES-665 Series center assembly can be identified by a green anodized vacuum pallet.
5. Install existing or new pressure spring and Enardo ES-665 Series center assembly. Place the pressure spring into the center assembly, then press this combination into the lid. Once the center assembly is pressed fully into lid, turn center assembly one quarter rotation to the right or left, then slowly allow spring to push the center assembly back out until center assembly is secured in the grooves in the lid. If center assembly comes back out fully, follow instructions in this step again until the center assembly is properly secured in the lid.
6. Close the hatch by pressing down on the lid and latching the hatch.
7. Permanently mark through the older model number on the nameplate to Enardo ES-665 Series.

Maintenance

Perform a scheduled maintenance every three (3) months and more frequently in corrosive or dusty atmospheres. To perform normal maintenance, inspect the pressure gaskets and vacuum gaskets.

To ensure efficient operation of all hatches, use a clean, nonabrasive, lint- free cloth or paper towel to carefully wipe off the pressure and vacuum seats and gaskets every time the hatch is opened. This prevents accumulation of residue that can deteriorate the performance of the valves. Under average operating conditions, replace the pressure and vacuum gaskets once a year. Replace the base gasket only when a leak is noticed at the bolting area or if the hatch is removed, breaking the seal. If the hatch is continually relieving, the user should be alerted that there is a problem and a close inspection should be made to determine the cause. To easily identify the parts, see Figure 5 for an exploded view of Enardo ES-665 Series.
Note: For parts information refer to the catalog data sheet on each model.

Gasket and Spring Replacement

Vacuum Assembly

1. The vacuum gasket is located between the vacuum pallet and the seal support on the vacuum assembly. The vacuum assembly seals against the underside of the center assembly. To remove the center assembly, depress the center assembly inward and turn one quarter rotation to the right or left (See installation of Retrofit Enardo ES-665 Series Center Hatch, step 2). Once the center assembly is removed, remove the cotter pin and the conical shaped vacuum spring from the vacuum stem.
2. Pull the vacuum assembly out from the bottom side of the center assembly. Remove and replace the vacuum gasket (See Table 2 for vacuum gasket options) from between the vacuum pallet and the seal support.
3. Reassemble the vacuum assembly, spring and cotter key in the reverse order of removal. Replace center assembly into lid (See installation of Retrofit Enardo ES-665 Series Center Hatch, step 5).

Pressure Assembly

1. To remove the center assembly, depress the assembly inward and turn one quarter rotation to the right or left (See installation of Retrofit Enardo ES-665 Series Center Hatch, step 2).
2. The pressure gasket or pressure spring can simply be removed and replaced. The pressure gasket (See Table 1 for pressure gasket options) is enveloped around the edge of the center assembly.
3. Stretch the old gasket off and fit the new one around the circular lip. Ensure that the envelope pressure gasket is installed squarely and flat around the circumference of the center.
4. When the center is assembled, replace the center assembly into the lid (See installation of Retrofit Enardo ES-665 Series Center Hatch, step 5). Under average operating conditions, springs should be replaced every two (2) years.

Parts Ordering
When corresponding with your local Sales Office about this equipment, always reference the equipment model number that can be found on the name plate.

Parts List (Figure 5)

Model Enardo ES-665,
Model Enardo ES-665-L,
Model Enardo ES-665-B and
Model Enardo ES-665-LB

Key Description Part Number

1. Base, Hatch ERAA32198A0
2. Disk, Pallet NE8559029A0
3. Gasket, Vacuum See Table 2
4. Seal Support NE8554636A0
5. Gasket, Envelope Pressure See Table 1
6. Spring, Vacuum See Table 4
7. Spring, Pressure See Table 3
8. Pin, Cotter, 1 in. NE2022101A0
9. Center ERAA32389A0
10. Stem NE8568824A0
11. O-ring NE2012710A0
12. Nut, 3/8 – 16 in. Hex Nylock NE2059201A0
13. Lid NE4522100A0
14. Latch ERAA32444A0
15. Pin, Latch
    • Model Enardo ES-665 (1 required) NE4505103A0
    • Model Enardo ES-665-L (1 required) NE4505103A0
    • Model Enardo ES-665-B (3 required) NE4505103A0
    • Model Enardo ES-664-LB (3 required) NE4505103A0
16. Clip, Hinge Pin
    • Model Enardo ES-665 (2 required) NE2027100A0
    • Model Enardo ES-665-L (6 required) NE2027100A0
    • Model Enardo ES-665-B (6 required) NE2027100A0
    • Model Enardo ES-664-LB (10 required) NE2027100A0
17. Pin, Latching NE4505118A0
18. Pin, Hatch Hinge NE4505113A0
19. Bushing (2 requried) NE8600403A0
20. Spring, Hinge (2 required) NE4504006A0
21. Nut, 1/4 in. (Optional) NE2013322A0
22. Bonding Strap (Optional) NE2050006A0
23. Washer, Lock 1/4 in. (Optional) NE2012560A0
24. Screw, 1/4 in. (Optional) NE2021817A0
25. Washer, Flat, 5/16 in. NE2012584A0
26. Nameplate NE4501209A0
27. Washer, Thrust Bearing (2 required) NE2020608A0
28. Thrust Bearing NE2020609A0
29. Bleeder, Hatch NE4540200A0
30. Handle, Hatch Bleeder NE4524400A0
31. Roller, Bleeder NE4505200A0

Enardo ES-665 Series

Table 1. Pressure (Envelope) Gasket Options

Table 2. Vacuum Gasket Options

Table 3. Pressure Spring Options

SETTING, OZ./SQ. IN.| MATERIAL| COLOR 1| COLOR 2| PART NUMBER
---|---|---|---|---
4| H.D. Steel (Galvanized)| Dark Green| Dark Green| NE4502300A0
6| H.D. Steel (Galvanized)| Brown| Brown| NE4502500A0
8| H.D. Steel (Galvanized)| Orange| Orange| NE4502700A0
12| H.D. Steel (Galvanized)| Pink| Pink| NE4502900A0
16| H.D. Steel (Galvanized)| Dark Blue| Dark Blue| NE4503100A0
24| Drawn Carbon steel Wire (Galvanized)| Red| Red| NE4503300A0
32| H.D. Steel (Galvanized)| Purple| Purple| NE4503201A0
4| Inconel®| Dark Green| White| NE4502400A0
6| Inconel®| Brown| White| NE4502600A0
8| Inconel®| Orange| White| NE4502800A0
12| Inconel®| Pink| White| NE4503000A0
16| Inconel®| Dark Blue| White| NE4503200A0
24| Inconel®| Red| White| NE4503400A0
32| Inconel®| Purple| White| NE4503600A0

Table 4. Vacuum Spring Options

SETTING, OZ./SQ. IN.| MATERIAL| COLOR 1| COLOR 2| PART NUMBER
---|---|---|---|---
0.4| H.D. Steel (Galvanized)| Light Blue| Light Blue| NE4503700A0
0.9| Music Wire| Gray| Gray| NE4504100A0
3.5| H.D. Steel (Galvanized)| Yellow| Yellow| NE4503900A0
0.4| Inconel®| Light Blue| White| NE4503800A0
0.9| Inconel®| Gray| White| NE4504200A0

Enardo ES-665 Series

Enardo ES-665 Series

D104127X012 © 2017, 2021 Emerson Process Management Regulator Technologies, Inc. All rights reserved. 08/21. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher™ is a mark owned by Fisher Controls International LLC, a business of Emerson Automation Solutions. The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice. Emerson Process Management Regulator Technologies Tulsa, LLC does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Process Management Regulator Technologies Tulsa, LLC product remains solely with the purchaser.

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