Emerson Enardo ES-665-HF Instruction Manual

Instruction Manual
D104266X012

March 2019

Model ES-665-HF High Flow
Spring-Loaded Hatch

Table of Contents

Introduction ............................................................................1

Specifications ........................................................................2

Principle of Operation ............................................................2

Tagging Information ...............................................................2

Installation and Disassembly .................................................2

Maintenance ..........................................................................5

Parts Ordering .......................................................................7

Parts List................................................................................7

Model ES-665-HF

P1806

WARNING

!

Failure to follow these instructions or to
properly install and maintain this equipment

could result in an explosion, re and/or

chemical contamination causing property
damage and personal injury or death.

Enardo™ 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 qualied service
person to service the unit. Installation,

operation and maintenance procedures

performed by unqualied person may

result in improper adjustment and unsafe
operation. Either condition may result in
equipment damage or personal injury. Only

a qualied person shall install or service the

spring-loaded hatch.

Introduction

Scope of the Manual

This Instruction Manual provides instructions for installation,
startup, maintenance and parts ordering information for the
Model ES-665-HF spring-loaded hatch.

MODEL ES-665-HF WITH CLOSED HATCH

North America Only

P1807

MODEL ES-665-HF WITH OPEN HATCH

Figure 1. Model ES-665-HF Spring-loaded Hatch

Product Description

The Model ES-665-HF high ow gauge hatch is designed
to provide much higher ow rates than standard gauge
hatches, while maintaining the industry leading, tight sealing

performance of the ES-665 Series. It also provides trouble

free operation with maintenance. The primary function of the
Model ES-665-HF high ow hatch is to prevent the loss of

vapors in a closed storage system and provide pressure and
vacuum relief.

Model ES-665-HF

Specications

The Specications table lists the specications for the Model ES-665-HF spring-loaded hatch.

Bolt Pattern

8 in. API

Pressure Setting Range

6, 8, 12 and 16 oz./sq. in.

Vacuum Setting Range

0.4, 0.9 and 3.5 oz./sq. in.

Optional Equipment

Base Gasket, Bolt Set and Non-Corrosive Coating

1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.

PRESSURE SETTING, OZ./SQ. IN. FLOW RATE SCFH (AIR) AT 24 OZ./SQ. IN. TANK PRESSURE

The Model ES-665-HF is a spring-loaded hatch with a
round base and cover. It can replace any standard 8 in. API

thief hatch. It has a higher volume of pressure venting than
offered by standard thief hatches and is intended for use

in applications where ultra-tight sealing is required such
as sour crude/gas tanks or where strict environmental

emissions standards are enforced.

(1)

(1)

Table 1. Pressure Tagging Information

6 210,000

8 200,000

12 150,000

16 100,000

Principle of Operation

Enardo gauge hatches are designed to control evaporation

losses and protect tanks against excessive pressure or vacuum.
When the tank pressure is above the setpoint of the hatch, the
cover opens to relieve excess pressure. When the overpressure

has dissipated, the cover reseats onto the base to provide
tight seal.

Tagging Information

The Model ES-665-HF high ow hatch has tagging

information on the spring capsule assembly and on the lid.

Figure 2 shows the typical locations of the tagging
information found on the Model ES-665-HF high ow hatch.

Location 1, on the spring capsule assembly, details the

pressure spring setting and the ow rate for that spring
setting when the tank pressure is at 24 oz./sq. in. Table 1
shows the ow rates at 24 oz./sq. in. for each pressure

spring setting.

Location 2, on the lid, details the vacuum setting and the
date of manufacture.

Viton® is a mark owned by E. I. du Pont de Nemours and Company.

Construction Material

Casting: Aluminum (non-sparking)
Pressure Gasket: HNBR (standard), Viton®

and Fluorosilicone
Vacuum Gasket: Fluorosilicone (standard)
and Viton

Approximate Shipping Weight

29 lbs / 13.2 kg

®

Installation and Disassembly

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.

Installing the High Flow
Model ES-665-HF Hatch

1. The Model ES-665-HF hatch can be installed on a

mating ange or roof deck with a standard 8 in. API bolt

pattern (16 – 9/16 in. holes on a 10 – 3/8 in. bolt circle).

For installation of the hatch directly to the tank roof,
place the base gasket on the bottom of the hatch ange
and place on tank roof with bolt holes aligned.

2. Insert the 16 bolts from the bottom up by reaching

inside the tank, through the hatch opening and attach

each nut to the bolt from the outside. Tighten all nuts
in a star pattern (refer to Figure 3) and ensure the
hatch is fastened securely. Refer to Tables 2 and 3 for
torque instructions.

3. For installation of the Model ES-665-HF hatch to a

anged pipe with an 8 in. API ange pattern, simply
place the base gasket on the anged pipe, line up bolt
holes and place hatch on top of base gasket. Install nuts

and bolts and tighten in a star pattern (refer to Figure 3).
Ensure hatch is fastened securely. Refer to Tables 2 and
3 for torque instructions.

WARNING

!

North America Only

2

1

5

9

3

8

12

14

2

6

10

15

4

7

11

13

16

Model ES-665-HF

Figure 2. Tagging Locations

Table 2. Torque Values for Flat Face Flange (Steel or Aluminum)

NOMINAL PIPE DIAMETER NUMBER OF BOLTS

1 4 0.50 12.70 14 18.98

1-1/4 4 0.50 12.70 16 21.69

1-1/2 4 0.50 12.70 18 24.41

2 4 0.63 16.00 32 43.39

2-1/2 4 0.63 16.00 43 58.30

3 4 0.63 16.00 47 63.72

3-1/2 8 0.63 16.00 26 35.25

4 8 0.63 16.00 32 43.39

6 8 0.75 19.05 49 66.44

8 8 0.75 19.05 68 92.20

10 12 0.88 22.4 69 93.55

12 12 0.88 22.4 98 132.9

14 12 1.00 25.0 138 187.1

16 16 1.00 25.0 125 169.5

18 16 1.13 28.7 142 192.5

2 20 1.13 28.7 135 183.0

24 24 1.25 31.8 156 211.5

8 API 16 0.50 12.70 20 27.12

20 API 16 0.63 16.00 75 101.7

24 API 20 0.63 16.00 75 101.7

Assumptions: Use of SAE grade 5 bolts or studs or stronger

Notes: Flat faced anges should never be mated to a raised face ange for installation.

No lubricant
Elastomer <70 Durometer Shore A

If lubricant is used on bolts, apply torque reduction factor listed in Lubricant Table.

For best results hardened steel washers should be used on all cast ange bolted connections.

Table 3. Torque Correction Factors for Common Lubricants Applied on Flanges

DESCRIPTION COEFFICIENT OF FRICTION MULTIPLY TORQUE VALUE IN TABLE 2 BY

Machine Oil f = 0.15 0.75

API SA2 Grease f = 0.12 0.60

Nickel-based Lubricant f = 0.11 0.55

Copper-based Lubricant f = 0.10 0.50

Heavy-duty Lubricating Paste f = 0.06 0.30

Figure 3 High Flow Hatch Torque Sequence

BOLT DIAMETER TORQUE

In. mm Ft-lbs N•m

North America Only

3

Model ES-665-HF

Accessing Spring Capsule Assembly or
Center Assembly

Note

The Spring Capsule Assembly must

be removed before removing the

Center Assembly.

The Model ES-665-HF Series Center

Assembly can also be installed as a retrot

into an existing Model ES-660-HF by
following the steps outlined in this section.

WARNING

!

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.

There are times when the spring capsule assembly may

need to be removed (e.g. to change the pressure setting
of the hatch) or to remove the center assembly (e.g. to

change the vacuum setting or to replace the gaskets) from

the Model ES-665-HF hatch. Remove the spring capsule

assembly and the center assembly by following a few

simple steps.

Figure 5. View of Spring Capsule Assembly Screws

1. Loosen the four (4) bolts that hold the spring capsule
assembly to the lid. The bolts can be loosened

approximately 1/8 in. or enough to allow rotation of the

spring capsule assembly in the machined slots. It is
not necessary to remove the bolts completely, as the

spring capsule assembly is designed with slots to allow
removal without having to remove the bolts.

Note

There will be slight spring pressure that
forces the spring capsule assembly upwards
as the bolts are loosened. This spring
pressure is not great enough to cause

the spring capsule assembly to have a

safety risk.

North America Only

Figure 4. Side View of Model ES-665-HF

The arrow is pointing to the spring capsule assembly that

houses the pressure spring. The center assembly is not

shown in this view, but is located under the hood.

4

Figure 6. Removal of Spring Capsule Assembly

2. With the screws loosened enough to remove the spring
capsule assembly, press the spring capsule assembly

down against the spring pressure and rotate. Remove
the spring capsule assembly when the large slot on the
spring capsule assembly is properly aligned with the

bolt head.

Figure 7. Opening High Flow Hatch Lid

3. To access the center assembly, press down slightly on
the lid and open the latch.

Model ES-665-HF

Figure 10. Removal of Center Assembly (Step 1)

Figure 8. View of Center Assembly

View of Model ES-665-HF high ow hatch with lid opened.
The arrow is pointing to the center assembly.

Figure 9. View of Lid Guide Slots

The center assembly is guided by slots in the lid.

4. To remove the center assembly, press the center
assembly inward until the center assembly bottoms

out against the inside of the lid, then turn the center
assembly one quarter rotation to the right or left to the

next set of guide slots (see Figure 10). Remove the
center assembly as shown in Figure 11. Be careful not

to drop the pivot pad that rests on top of the center
assembly and provides guidance for the spring capsule
assembly stem.

Figure 11. Removal of Center Assembly (Step 2)

North America Only

Maintenance

Perform a scheduled maintenance every three (3) months
and more frequently in corrosive or dusty atmospheres.

Inspect the pressure gaskets and vacuum gaskets for
normal maintenance. To ensure efcient operation of all
hatches, carefully wipe off the pressure and vacuum seats
and gaskets with a clean, non-abrasive, lint-free cloth or
paper towel every time the hatch is opened. This prevents

accumulation of residue that can deteriorate the performance
of the hatches.

Under average operating conditions, replace the pressure
and vacuum gaskets once a year. Replace the base gasket
when a leak is noticed at the bolting area or if the hatch
is removed, breaking the seal. If the hatch is continually
relieving, this is a sign that there is a problem. At that time, a

close inspection should be made to determine the cause.

Note

For parts information refer to the catalog
data sheet on each model. For ease of

part identication, see Figure 16 near the
end of the manual for an exploded view of
Model ES-665-HF high ow hatch.

5

Model ES-665-HF

Figure 12. Spring Capsule Assembly

Figure 13. Center Assembly

High Flow (Model ES-665-HF) Hatch
Replacement Parts

Spring Capsule Assembly

WARNING

!

Under no circumstances should the user
attempt to disassemble the spring capsule
assembly. The spring capsule assembly
contains a pre-loaded spring and improper
handling could result in injury.

The spring capsule assembly comes as a pre-assembled
unit. If there is a need to change the pressure setting of the

Model ES-665-HF hatch or to replace an existing spring

capsule assembly, the appropriate spring capsule assembly

can be ordered. Simply follow the instruction in Accessing
Spring Capsule Assembly or Center Assembly steps 2 and 3

in reverse order to install the spring capsule assembly.

Center Assembly

See Figure 13. The center assembly consists of the pressure

gasket, the center casting and the vacuum assembly.
Although not part of the center assembly, the pivot pad is
shown for additional clarity of its relationship to the center

assembly. The pivot pad is not attached to the center
assembly, but rests on top of it to transfer the spring force
from the spring capsule assembly to the center assembly.

Pressure Gasket and Center

1. To remove the center assembly, rst, remove the spring
capsule per Accessing Spring Capsule Assembly or
Center Assembly, steps 1 and 2. Then remove the
center assembly from the same section steps 3 and 4.

Figure 14. Center and Pressure Gasket

2. The pressure gasket can then be removed and

replaced. The envelope pressure gasket (See Table 4
for pressure gasket options) is enveloped around the
edge of the center assembly. Stretch the old gasket off
and t the new gasket around the circular lip. Ensure
that the bottom side of the pressure gasket is tted

properly in the groove on the bottom of the center

casting. Also ensure that the envelope pressure gasket
is installed squarely and at around the circumference
of the center. See Figure 14 for detailed view of the
pressure gasket and the center.

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, rst remove the
spring capsule per Accessing Spring Capsule Assembly
or Center Assembly, steps 1 and 2. Remove the center
assembly under the same section with steps 3 and 4.

2. Once the center assembly is removed, remove the
cotter pin and the conical shaped vacuum spring from
the vacuum stem. Pull the vacuum assembly out from
the bottom side of the center assembly.

3. Remove and replace the vacuum gasket (See Table 5

for vacuum gasket options) from between the vacuum

pallet and the seal support.

4. Reassemble the vacuum assembly, spring and cotter
key in the reverse order of removal. Replace center
assembly into lid (See Section Accessing Spring
Capsule Assembly or Center Assembly and follow
steps 1 through 4 in reverse order). Ensure the pivot
pad is installed at on top of the center assembly before

the spring capsule assembly is attached. See Figure 15

for detailed view of the vacuum assembly.

North America Only

6

Model ES-665-HF

Table 4. Pressure (Envelope) Gasket Options

MATERIAL PART NUMBER

HNBR (Standard) 4504601

Fluorosilicone (Standard) 4504705

SETTING, OZ./SQ. IN. PART NUMBER

SETTING, OZ./SQ. IN. MATERIAL COLOR 1 COLOR 2 PART NUMBER

0.4 H.D. Steel (Galvanized) Light Blue Light Blue 4503700

0.9 Drawn CS Wire (Galvanized) Gray Gray 4504100

3.5 H.D. Steel (Galvanized) Yellow Yellow 4503900

0.4 Inconel

0.9 Inconel

®

Viton

Fluorosilicone 4504605

4504603

Table 5. Vacuum Gasket Options

MATERIAL PART NUMBER

Viton

®

4504708

Table 6. Spring Capsule Options

6 4556201

8 4556202

12 4556203

16 4556204

Table 7. Vacuum Spring Options

®

®

Light Blue White 4503800

Gray White 4504200

Parts Ordering

When corresponding with your local Sales Ofce about this
equipment, always reference the equipment serial number

stamped on the nameplate.

When ordering replacement parts, specify the complete
7-character part number of each required part as found in

the following parts list.

Parts List

Vacuum Assembly

Key Description Part Number

1 Vacuum Stem, Aluminum 8568825
2 Flat Washer, 3/8 in., 316 Stainless steel 2012504

3 010 O-ring, Viton® 2012710

4 Seal Support, Aluminum 8554636
5 Vacuum Gasket Per order
6 Vacuum Pallet Disk, Aluminum 8559029
7 Hex Nylock Nut, 3/8 in. - 16, 316 Stainless steel 2059201

Model ES-665-HF Hatch

Key Description Part Number

1 Spring Capsule Per order
2 Hex Bolt, 1/4 in. - 20 x 5/8 in.,
316 Stainless steel (4 required) 2035901
3 Center Pad, Aluminum 4557001
4 Latch, Aluminum 4524100
5 #5-C Latch Pin, Zinc-plated Carbon steel 4504103
6 #HPC - 148 Hinge Pin Clip,
Zinc-plated Carbon steel (2 required) 2027100
7 Lid, Aluminum 4522001
8 #70 Envelope Gasket Per order
9 Cotter Pin, 1/8 x 1 in., 304 Stainless steel 2022101
10 Vacuum Stem, Aluminum 8568825

11 Vacuum Spring Per order

12 Center, Aluminum 4556002
13 Flat Washer, 3/8 in., 316 Stainless steel 2012504
14 010 O-ring, Viton
15 Seal Support, Aluminum 8554636
16 Vacuum Gasket Per order
17 Vacuum Pallet Disk, Aluminum 8559029
18 Hinge Spring, 302 Stainless steel 4504005
19 Clevis Pin, 5/6 x 2 1/2 in., Zinc-plated Carbon steel 4505110
20 Hex Nylock Nut, 3/8 in. - 16, 316 Stainless steel 2059201
21 Base, Aluminum 4507303
22 Cotter Pin, 1/8 x 1/2 in.,
304 Stainless steel (2 required) 2000703
23 Clevis Pin, 5/16 x 3 1/2 in., Zinc-plated Carbon steel 4505112

®

2012710

North America Only

Viton® is a mark owned by E. I. du Pont de Nemours and Company.
Inconel® is a mark owned by Special Metals Corporation.

7

1

3

5

6

7

4

2

PALLET DISK GROOVE SIDE UP

Model ES-665-HF

Figure 15. Vacuum Assembly Figure 16. Model ES-665-HF High Flow Hatch

Exploded View

North America Only

[e-mail]

Enardo.com

Emerson Automation Solutions

Americas

McKinney, Texas 75070 USA
T [phone]

[phone]

Tulsa, OK 74146 USA
T [phone]

Europe
Bologna 40013, Italy
T [phone]

Facebook.com/EmersonAutomationSolutions

LinkedIn.com/company/emerson-automation-solutions

Twitter.com/emr_automation

Asia Pacic

Singapore 128461, Singapore
T [phone]

Middle East and Africa

Dubai, United Arab Emirates
T [phone]

D104266X012 © 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 03/19.
The Emerson logo is a trademark and service mark of Emerson
Electric Co. All other marks are the property of their prospective owners.
Enardo™ is a mark owned by Regulator Technologies Tulsa, 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

specications 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.