EMERSON Enardo 2500 Emergency Pressure Relief Vents Instruction Manual

EMERSON Enardo 2500 Emergency Pressure Relief Vents Instruction Manual

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 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 emergency pressure relief vent.

Introduction

Scope of the Manual

This Instruction Manual provides instructions for installation and maintenance for the Enardo 2000 and Enardo 2500 Series Emergency Pressure Relief Vents (EPRVs).

Figure 1. Enardo 2000 Series Emergency Pressure Relief Vent

Figure 2. Enardo 2500 Series Emergency Pressure Relief Vent with Vacuum

Figure 3. Enardo 2000 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.

Enardo 2000 Series emergency pressure relief vent (EPRV) provides pressure relief only. Enardo 2500 Series Emergency Pressure Relief Vent with Vacuum (EPRV-V) provides pressure and vacuum relief.

Specifications

The Specifications section lists the specifications for the Enardo 2000 and Enardo 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)
Enardo 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)

Enardo 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

Enardo 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®

Enardo 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

---|---

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

Figure 4. Product Identification and Marking

II 1 G Ex h IIC T6 Ga
OUTER HOUSING OF STAINLESS STEEL, CARBON STEEL OR COATED ALUMINUM
II 2 G Ex h IIC T6 Gb
OUTER HOUSING OF UNCOATED ALUMINUM
II 1 G Ex h ia IIC T5 Ga
SMART WIRELESS ID MARKING
(ENARDO 2000 SERIES MODELS ONLY)
HAZARDOUS LOCATION

Table 1. Connection sizes and Model Number

Enardo 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.
Enardo 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 Enardo 2000 and Enardo 2500 Series meet the API standard 2000 for emergency venting due to fire exposure. Enardo 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

Hazardous Locations

Fisher™ Emergency Pressure Relief Vents are available with outer housings of carbon steel, stainless steel or aluminum as indicated in Figure 4.

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
  (Enardo 2500 Series only)

  • Setting – Ex. Z0.5
  • F low 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 Enardo 2000 and Enardo 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 Enardo 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 Enardo 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.

Figure 7. Enardo 2000 and Enardo 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 Enardo 2000 and Enardo 2500 Series.

Install the Enardo 2000 and Enardo 2500 Series on the flange bolt patterns that match with bolt pattern of the vent.
The attachment flange base should be at level surface.

1. Carefully remove the Enardo 2000 and Enardo 2500 Series from its crate. The seal portion of the vents is delicate, protect this surface while handling the unit.
2. Place the appropriate gasket on the level attachment flange and center the vent into place.
3. 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.
4. 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.

Figure 8. Model 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 under pressure.

Follow the instruction below for the preventive maintenance of the Enardo 2000 and Enardo 2500 Series.

1. Loosen fasteners on top of the vent and remove the hood and the spring chamber.

2. 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.
   

3. Replace the spring chamber and hood. Fasten them securely

4. 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. Enardo 2500 Series with an Elevated Pressure Setting

Remote Monitoring Maintenance

1. Maintain Smart Wireless Model Enardo 2000 EPRV’s in the same way as all standard EPRV’s.
2. Take certain precautions when cleaning the transmitter.
   The surface resistivity of the antenna assembly is greater than 1 GΩ. To avoid electrostatic charge buildup, it must not be rubbed or cleaned with solvents or dry cloth.

Pressure and Vacuum Setting Information

Both the Enardo 2000 and Enardo 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 Enardo 2500 Series are set with a spring. For each setting that Fisher™ 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.

Table 2. Torque Specifications – Raised Face Flange, Steel only

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.

Table 3. Torque Specifications – Flat Face Flange, Steel or Aluminum

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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Technologies, Inc. All rights reserved. 12/21.
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