EMERSON D104617X012 2000A Series Emergency Pressure Relief Vents Instruction Manual
- June 3, 2024
- Emerson
Table of Contents
EMERSON D104617X012 2000A Series Emergency Pressure Relief Vents
Instruction Manual
Introduction
Scope of the Manual
This Instruction Manual provides instructions for installation and maintenance for the 2000A Series Emergency Pressure Relief Vent (EPRV).
2000A Series Emergency Pressure Relief Vent
2000A Series with Smart Wireless Monitoring
Product Description
Emergency 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. The 2000A Series Emergency Pressure Relief
Vent (EPRV) provides pressure relief only. Properly-sized 2000A Series meet
the API standard 2000 for emergency venting due to fire exposure. This vents
provide quick easy access for tank inspection and maintenance.
Specifications
The Specifications section lists the specifications for the 2000A 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)
2.0 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)
Construction Materials
Base and Arm
Carbon Steel, 304 Stainless steel and
316L Stainless steel
Disk and Seal Support
Aluminum, 304 Stainless steel and
316L Stainless steel
Seal
Buna-N, FEP Teflon® and Viton®
Certification
EN IEC 60079-0:2018
EN IEC 60079-11:2012
EN ISO 80079-36:2016
EN ISO 80079-37:2016
Anderson Greenwood
Emergency Pressure Relief Vent Model Number
Remote Monitoring Option
The Smart Wireless monitoring option is available with the 2000A 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
Hazardous Locations
Emergency Pressure Relief Vents are available with outer housings of carbon
steel, stainless steel or aluminum as indicated in Figure 3.
Nameplate
A nameplate is attached to the vent and contains the following information:
- Model Number – Ex. 2024A-21T-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
Pressure Flow
Principle of Operation (Figure 6)
The 2000A Series maintain a tight seal until system pressure 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.
Note
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 2000A 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 2000A 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.
2000A Series Assembly Drawing
2000A Series with Smart Wireless Monitoring Option
Installation
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. Make sure line is free of hazardous vapors before installing or servicing the valve. 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 2000A Series. Install the 2000A Series on the flange bolt patterns that match with bolt pattern of the vent. The attachment flange base should be at level surface.
- Carefully remove the 2000A 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.
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 under pressure. An opened EPRV, where the EPRV arm and cover
have rotated away from contacting the base, contains a large amount of
potential energy. Always use appropriate lifting equipment when installing or
maintaining the EPRV to avoid the risk of serious injury if the EPRV closes
rapidly.
Follow the instruction below for the preventive maintenance of the 2000A Series.
Remote Monitoring Maintenance
- Maintain 2000A Series EPRV with Smart Wireless Monitoring option in the same way as all standard EPRV.
- 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 Setting Information
The 2000A Series can reach various pressure settings in units of ounces, inches of water, millimeter of water, or kPa 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.
Torque Specifications – Raised Face Flange, Steel only
NOMINAL PIPE DIAMETER| # BOLTS| BOLT DIAMETER, IN.| TORQUE,
FT-LBS.
---|---|---|---
20| 20| 1.13| 214
24| 24| 1.25| 253
Assumptions:Use of SAE grade 5 bolts or studs or stronger No
lubricantCompressed 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.
Torque Specifications – Flat Face Flange, Steel or Aluminum
NOMINAL PIPE DIAMETER| # BOLTS| BOLT DIAMETER, IN.| TORQUE,
FT-LBS.
---|---|---|---
20| 20| 1.13| 135
24| 24| 1.25| 156
20 API| 16| 0.63| 75
24 API| 20| 0.63| 75
Assumptions:Use of SAE grade 5 bolts or studs or stronger No
lubricantElastomer <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.
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 Paste| f = 0.06| 0.30
References
Read User Manual Online (PDF format)
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