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Instruction Manual
D104632X012
December 2021
Enhanced Sealing Enardo ES-850 and
Enardo ES-950 Series Pressure/Vacuum
Relief Valve (ATEX Approved)
P1854
MODEL EnARDO ES-850
P1854
Figure 1. Enardo ES-850 and Enardo ES-950 Series
Pressure/Vacuum Relief Valve
Table of Contents
Introduction ...........................................................................2
Specifications .......................................................................2
Product Identification and Marking .......................................5
Principle of Operation ...........................................................5
Installation ............................................................................8
Maintenance ....................................................................... 11
Adjustments ........................................................................14
Valve Repair .......................................................................16
Enardo ES-850 and Enardo ES-950 Series
MODEL EnARDO ES-950
MODEL EnARDO ES-850
Figure 2. Enardo ES-850 and Enardo ES-950 Series
with Smart Wireless option
▲
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™ pressure/vacuum relief valve
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. These units are not
designed or intended for use in mobile, high
vibration or high acceleration applications.
MODEL EnARDO ES-950
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Summary of Contents for Emerson Enardo ES-850 Series
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Page 1: Table Of Contents
Adjustments ................14 local codes, rules and regulations, and Emerson Process Management Valve Repair ...............16 Regulator Technologies Tulsa, LLC (Emerson) instructions. These units are not designed or intended for use in mobile, high vibration or high acceleration applications. -
Page 2: Introduction
3. 8, 10 and 12 in. / 200, 250 and 300 mm sizes limited to a maximum pressure relief setting of 16 oz./sq.in. / 69 mbar when a vacuum relief setting of 0.4 oz./sq. in. / 1.72 mbar is used. Failure to correct trouble could result in a The Enardo ES-850 Series provides pressure and vacuum relief hazardous condition. Call a qualified service in applications that require hazardous vapors to be piped away person to service the unit. - Page 3 Enardo ES-850 and Enardo ES-950 Series Model Inlet Size Outlet Size Housing Material Pallet and Seat Material Pallet Seal Material Body/Seat/Lid Seal Material - Enardo ES-850 2 to 12 in. 3 to 14 in. 1 = Aluminum 2 = 316SST 1 = FEP 1 = PTFE Body and FEP Seat/Lid...
- Page 4 Enardo ES-850 and Enardo ES-950 Series Table 1. Model Enardo ES-850 Weights WEIGHT OF CALIBRATIOn WEIGHTS REQUIRED TO WEIGHT WEIGHT (2)(3) ACHIEVE DESIRED RELIEF SETTInG InLET COnnECTIOn OUTLET COnnECTIOn (STAInLESS STEEL OR (ALUMInUM) CARBOn STEEL) Weight per oz/sq. in. Weight per in. w. c. 1.
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Page 5: Product Identification And Marking
Enardo ES-850 and Enardo ES-950 Series OUTER HOUSInG OF STAInLESS STEEL, II 1 G Ex h IIC T6 Ga CARBOn STEEL OR COATED ALUMInUM OUTER HOUSInG OF II 2 G Ex h IIC T6 Gb UnCOATED ALUMInUM Figure 6. Product Identification and Marking Hazardous Locations Fisher™... - Page 6 Enardo ES-850 and Enardo ES-950 Series LID AnD UPPER GUIDE LID O-RInG OUTLET FLAnGE PRESSURE CHAMBER LID AnD UPPER GUIDE VALVE PALLET VALVE SEAT VACUUM CHAMBER DRAIn PLUG VALVE PALLET STEM BODY ATTACHMEnT GASKET VALVE PALLET SEAL SEAT O-RInG InLET FLAnGE InSTALLATIOn STUD MODEL EnARDO ES-850 PIPE-AWAY PRESSURE/VACUUM RELIEF VALVE GUIDE BUSHInG...
- Page 7 Enardo ES-850 and Enardo ES-950 Series WIRELESS LID TRAnSMITTER SEnSOR COnDUIT WIRELESS STEM WIRELESS LID SEnSOR COnDUIT WIRELESS STEM Figure 8. Model Enardo ES-850 with Smart Wireless Option COnDUIT WIRELESS HOOD SEnSOR BRACKET SET SCREW TRAnSMITTER SLEEVE WIRELESS STEM WIRELESS LID COnDUIT VEnT ROD SEnSOR...
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Page 8: Installation
Enardo ES-850 and Enardo ES-950 Series Installation Enardo ES-850 and Enardo ES-950 Series ▲ WARnInG Take all necessary precautions and safety measures when lifting valves into place to prevent unbalanced load situations. Do not install calibration weights or pallet assemblies prior to mounting and installation of valve. - Page 9 Enardo ES-850 and Enardo ES-950 Series note △ CAUTIOn For more details on using weights to adjust the pallet setting, read the Use care when installing weights and Adjustments section. securing lids to avoid getting pinched. 6. Install the covers and/or hood. △...
- Page 10 Enardo ES-850 and Enardo ES-950 Series Table 3. Torque Specifications - Raised Face Flange, Steel Only nOMInAL PIPE DIAMETER nUMBER OF BOLTS BOLT DIAMETER, In. TORQUE, FT-LBS 0.63 0.63 0.63 0.75 0.75 0.88 0.88 1.00 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 Table 5.
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Page 11: Maintenance
Enardo ES-850 and Enardo ES-950 Series Figure 10. Model Enardo ES-850, Installation of Weights Figure 11. Model Enardo ES-950, Installation of Weights 3. For the Model Enardo ES-950 PVRVs containing hoods, Avoid release to the environment. Wash hands the sensor is located at a proper distance away from with soap and water after handling. - Page 12 Enardo ES-850 and Enardo ES-950 Series For preventive maintenance of the Fisher™ pressure/ 3. Inspect the pallets for any damage or buildup that may affect its sealing characteristics or its ability to vacuum relief valve, refer to the following instructions. move properly inside the valve.
- Page 13 Enardo ES-850 and Enardo ES-950 Series 6. If the valve has a lid, clean any buildup that may exist in or around the guide hole located in the center of the part. 9. Reinstall weights onto their appropriate valve pallets. 7.
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Page 14: Adjustments
Enardo ES-850 and Enardo ES-950 Series PLACE RETROFIT STICKER nEXT TO VALVE nAMEPLATE. Figure 12. Model Enardo 950 PVRV Retrofit Sticker Placement Smart Wireless Monitoring Maintenace 1. Maintain Wireless Models Enardo ES-850 and Enardo ES-950 Remove ring using a flat-bladed screwdriver PVRVs in the same way as all standard Models Enardo ES-850 and Enardo ES-950 PVRVs. - Page 15 If the pressure and vacuum weights are mixed together, sort into the weight. Emerson offers several different sizes of and reorganize the weights. pressure/vacuum relief valves. To ensure that the right...
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Page 16: Valve Repair
Technologies, Inc. All rights reserved. 12/21. Emerson Automation Solutions 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...