EMERSON 2000 Emergency Pressure Relief Vents Instruction Manual
- June 4, 2024
- Emerson
Table of Contents
EMERSON 2000 Emergency Pressure Relief Vent
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. Enardo emergency pressure relief vent 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 (Emerson) instructions . Failure to correct trouble could result in a hazardous condition. Call a qualified service to service the unit. Installation, operation and maintenance procedures performed by an 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 emergency pressure relief vent.
Introduction
Scope of the Manual
This Instruction Manual provides instructions
for installation and maintenance for the 2000 and 2500 Series emergency
pressure relief vents (EPRVs).
- Figure 1. 2000 Series Emergency Pressure Relief Ven
- Figure 2. 2500 Series Emergency Pressure Relief Vent with Vacuu
- Figure 3. 2000 Series with Smart Wireless Monitorin
Product Description
pressure relief vents are designed to provide an emergency pressure relief
opening for storage tanks when exposed to overpressures that are not handled
by standard tank vents.
2000 Series emergency pressure relief vent (EPRV) provides pressure relief
only. 2500 Series emergency pressure
relief vent with vacuum (EPRV-V) provides pressure and vacuum relief.
Specifications
The Specifications section lists the specifications for the 2000 and 2500 Series. Specification is stamped on the nameplate attached to the emergency relief vent. Refer to Product Identification and Marking section for the nameplate details.
Connection Sizes Available See Table 1
Pressure Ranges(1)(2)
- 2000 Series:
- 2.0 to 32.0 oz./sq. in.
- (0.5 oz./sq. in. increments) 3.5 to 55.0 in. w.c.
- (1.0 in. w.c. increments) 8.6 to 138 mbar
- (2.2 mbar increments) 2500 Series:
- 4.0. to 16.0 oz./sq. in.
- (0.5 oz./sq. in. increments) 7.0 to 27.0 in. w.c.
- (0.5 in. w.c. increments) 17.4 to 67.2 mbar
- (2.2 mbar increments)
Vacuum Pressure Ranges(1) (2500 Series)
- 0.5, 0.75, 1 and 2 oz./sq. in.
Construction Materials 2000 Series
- Base and Arm: Carbon Steel, 304 Stainless steel and
- 316 Stainless steel
- Disk and Seal Support: Aluminum,
- 304 Stainless steel and 316 Stainless steel
- Seal: Buna-N, FEP Teflon® and Viton®
2500 Series
- Base, Arm and Hood: Carbon steel,
- 304 Stainless steel and 316 Stainless steel
- Disk and Seal Support: Aluminum and 316 Stainless steel
- Seal: FEP Teflon®, Viton® and Buna-N
- Vacuum Spring: 302 Stainless steel
- Vacuum Pallet and Vacuum Seat: Polyphenylene Sulfide and 316 Stainless steel
Certification
- EN IEC 60079-0:2018
- EN IEC 60079-11:2012
- EN ISO 80079-36:2016
- EN ISO 80079-37:2016
Figure 4. Product Identification and Marking
Table 1. Connection sizes and Model Number
__
SERIES
| __
MODEL
| CONNECTION SIZE
---|---|---
ANSI| API
__
__
__
__
2000 Series Emergency Pressure Relief –
For Pressure Relief Only
| 2004| 4 in.| – – – –
2008| 8 in.| 8 in.
2012| 12 in.| – – – –
2016| 16 in.| – – – –
2018| 18 in.| – – – –
2020| 20 in.| 20 in.
2024| 24 in.| 24 in.
2500 Series Emergency Pressure Relief Vent
with Vacuum –
For Pressure and Vacuum Relief
| 2516| 16 in.| – – – –
2520| 20 in.| 20 in.
2524| 24 in.| 24 in.
Figure 5. Emergency Pressure Relief Vent Model Number
Properly-sized 2000 and 2500 Series meet the API standard 2000 for emergency venting due to fire exposure. 2500 Series handles high capacity vacuum flow for emergency pump-out of product. These vents provide quick easy access for tank inspection and maintenance.
Remote Monitoring Option
The Smart Wireless monitoring option is available with the Enardo 2000 Series.
It allows the detection of the Open
or Closed position of the emergency vent from a remote site. Under normal
conditions, the emergency vent should be Closed. An Open indication can alert
personnel that there is a potential safety or emissions issue that should be
further investigated.
Product Identification and Marking
Locations
Enardo Emergency Pressure Relief Vents are available with outer housings of
carbon steel, stainless steel or aluminum as indicated in Figure 4.
Teflon® and Viton® are marks owned by E. I. du Pont de Nemours and Company.
Nameplate
A nameplate is attached to the vent and contains the following information:
- Model Number – Ex. 2024-24T-1
- Connection Flange Size – 24 in.
- Serial Number
- Tag Number (Optional)
- Notified Body Number – Ex. 2460
- Cat. No. (Category Number)
- Category 1 – Stainless steel, Carbon steel or Coated aluminum vents
- Category 2 – uncoated aluminum vents
- Date – date of manufacture
- Certificate – Ex. PRESAFE 17 ATEX 10273X
- Pressure Setting and Flow Rate
- Setting – Ex. Z4.0
- Flow Rate SCFH (Air) – Ex. 00000
- Vacuum Setting and Flow Rate (2500 Series only)
- Setting – Ex. Z0.5
- Flow Rate SCFH (Air) – Ex. 00000
Figure 6. Pressure and Vacuum Flow
PPE Warning
WARNING
Wear protective gloves and clothing to prevent skin contact when handling lead
weights. Wear eye protection. Avoid breathing dust/fumes/mist/vapors/spray. Do
not eat, drink or smoke
while using the product. Avoid release to the environment. Wash hands with
soap and water after handling. Keep away from excessive heat and open flames.
WARNING
Make sure line is free of hazardous vapors before installing or servicing the valve.
Principle of Operation
Refer to Figure 6. The 2000 and 2500 Series maintain a tight seal until system
pressure or vacuum exceeds the set pressure of the vent. To adjust the set
pressure, a series of weights may be stacked onto the lid assembly. When
overpressure occurs, the weighted lid assembly lifts, breaking the seal
between the seat and seal portion of the lid assembly. This allows vapors to
pass through the vent orifice
and relieve pressure build up. The vent reseals upon relief and remains
sealed. It is important to note that relieving vapors near the set pressure in
a continuous manner may cause the lid
assembly to flutter or oscillate. This is a common occurrence in products of
this type in the industry. Operating the vent with flutter or oscillation over
time may cause premature vent damage or wear. Contact your local Sales Office
for additional assistance.
Remote Monitoring Option
The Smart Wireless option for the 2000 Series consists of the EPRV, a
proximity sensor, and a wireless transmitter. The built-in proximity sensor
detects the open or closed position using a magnetic target located on the arm
assembly on the hinged end. A signal is sent to the wireless transmitter,
which can then be sent to a control room via any WirelessHART® Gateway. This
wireless sensor networking technology is based on the Highly Addressable
Remote Transducer (HART®) protocol. It is the most widely used wireless
networking standard used today and, for this reason, the 2000 Series has been
designed to integrate with it. As long as the wireless gateway is
WirelessHART®, it will receive the Open or Closed signal from the device. The
WirelessHART® gateway will then send the information to a control room which
can make use of any number of software integration packages.
2500 SERIES EMERGENCY RELIEF VENT WITH VACUUM (EPRV-V)
Figure 7. 2000 and 2500 Series Assembly Drawing
Installation
WARNING
The EPRV Series is shipped with its lid held partially open. The lid assembly has attached weights and is heavy. Use caution when removing the shipping blocks and metal bands to avoid injury to fingers and hands.
Before installing the relief vent, remove the unit from its crate and discard
any protective coverings. Follow the instruction below for the installation of
the 2000 and 2500 Series.
Install the 2000 and 2500 Series on the flange bolt patterns that match with
bolt pattern of the vent. The attachment flange base should be at level
surface. HART® and WirelessHART® are marks
- Carefully remove the 2000 and 2500 Series from its crate. The seal portion of the vents is delicate, protect this surface while handling the unit.
- Place the appropriate gasket on the level attachment flange and center the vent into place.
- Insert the appropriate number of bolts and make sure the vent is fastened securely. Installed bolts should be clear of the lid assembly when it is in the full open position.
- Inspect the installed unit from items that would keep it from working properly. The sealing area should be free of any debris that would cause leakage. The arm of the vent should be able to fully open.owned by FieldComm Group.
Figure 8. Enardo 2000 Smart Wireless Monitoring Option
Maintenance
WARNING
Always make sure that the tank is at atmospheric pressure before opening.
pressure build-up inside the tank can cause a spray to be emitted from the
vent if opened
Follow the instruction below for the preventive maintenance of the 2000 and
2500 Series.
- Loosen fasteners on top of the vent and remove the hood and the spring chamber.
- Inspect and clear away any debris or buildup that may cause the vent to become lodged or impede air flow through the unit. Do not adjust the height of the installed spring. Clean the internal components with a suitable solvent and non-abrasive cloth.
- Replace the spring chamber and hood. Fasten
- Clear away any debris or buildup on the unit surface that may cause the vent to become lodged, impede air flow or add weight to the lid assembly (added weight will adjust the pressure setting of the vent).
Figure 9. 2500 Series with an Elevated Pressure Setting
Remote Monitoring Maintenance
- Maintain Smart Wireless Model 2000 EPRV’s in the same way as all standard EPRV’s.
- Take certain precautions when cleaning the transmitter. The surface resistivity of the antenna assembly is greater than 1 GΩ. To avoid electrostatic charge build-up, it must not be rubbed or cleaned with solvents or dry cloth.
Pressure and Vacuum Setting Information
Both the 2000 and 2500 Series can reach various pressure settings in units of
ounces or inches of water column. The minimum pressure setting that each vent
can achieve depends on the individual vent size and material. Minimum settings
are reached when the unit is installed by itself. However, when weights are
added to the arm of the unit, elevated pressures can be reached. These
elevated settings
are preset at the factory and should never be field adjusted. Vacuum settings
for the 2500 Series are set with a spring. For each setting that Enardo
offers, there is a spring that is specifically designed to do the job. The
standard settings available are 0.5, 0.75, 1 and 2 oz. Once again, these
settings are preset at the factory and should never be field adjusted.
NOMINAL PIPE DIAMETER| # BOLTS| BOLT DIAMETER, IN.| TORQUE,
FT-LBS.
---|---|---|---
4| 8| 0.63| 43
8| 8| 0.75| 109
10| 12| 0.88| 101
12| 12| 0.88| 135
16| 16| 1.00| 159
18| 16| 1.13| 244
20| 20| 1.13| 214
24| 24| 1.25| 253
Assumptions:
Use of SAE grade 5 bolts or studs or stronger No lubricant
Compressed mineral fiber material or similar
__
Notes:
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 flange bolted connections.
NOMINAL PIPE DIAMETER| # BOLTS| BOLT DIAMETER, IN.| TORQUE,
FT-LBS.
---|---|---|---
4| 8| 0.63| 32
8| 8| 0.75| 68
10| 12| 0.88| 69
12| 12| 0.88| 98
16| 16| 1.00| 125
18| 16| 1.13| 142
20| 20| 1.13| 135
24| 24| 1.25| 156
8 API| 16| 0.50| 20
20 API| 16| 0.63| 75
24 API| 20| 0.63| 75
Assumptions:
Use of SAE grade 5 bolts or studs or stronger No lubricant
Elastomer <70 Durometer Shore A
__
Notes:
Flat faced flanges should never be mated to a raised face flange for installation.
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 flange bolted connections.
Table 4. Torque Reduction Factor per Lubricant
DESCRIPTION| COEFFICIENT OF FRICTION| MULTIPLY TORQUE VALUE IN
TABLE 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 Past| f = 0.06| 0.30
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Inc. All rights reserved. 12/21. The Emerson logo is a trademark and service
mark of Emerson
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Enardo™ is a mark owned by Regulator Technologies Tulsa, LLC, a business of
Emerson Automation Solutions.
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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. All
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Management Regulator Technologies Tulsa, LLC does not assume responsibility
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