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Instruction Manual
D103814X012
February 2022
Enardo 860 and 960 Series Spring-Loaded
Pressure/Vacuum Relief Valve (ATEX Approved)
Table of Contents
Introduction .................................................................. 1
Specifications .............................................................. 2
Product Identification and Marking .............................. 4
Principle of Operation .................................................. 4
Installation ................................................................... 5
Maintenance ................................................................ 9
Weight Information .................................................... 11
Valve Repair .............................................................. 11
▲
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™ spring-loaded 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.
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 spring-loaded pressure/
vacuum relief valve.
Enardo 860 and 960 Series
Figure 1. Enardo Model 860 Spring-Loaded Pressure/
Vacuum Relief Valve
Figure 2. Enardo Model 960 Spring-Loaded Pressure/
Vacuum Relief Valve
Introduction
Scope of the Manual
This Instruction Manual provides instructions for
installation, maintenance and parts ordering information
for the Enardo 860 and 960 Series spring-loaded
pressure/vacuum relief valve (SL-PVRV).
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Summary of Contents for Emerson Enardo 860 Series
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Page 1: Table Of Contents
Fisher™ spring-loaded 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. Figure 2. Enardo Model 960 Spring-Loaded Pressure/ Failure to correct trouble could result in Vacuum Relief Valve a hazardous condition. -
Page 2: Specifications
Enardo 860 and 960 Series Specifications The Specifications section on this page provides specifications for the Enardo 860 and 960 Series spring-loaded pressure/vacuum relief valve. Specification is stamped on the nameplate attached to the relief valve. Refer to Product Identification and Marking section for the nameplate details. Available Construction Construction Materials See Figure 3... - Page 3 Mount Vacuum Relief Valve - Pipe-Away higher pressure settings than standard dead weight- loaded valves.The Enardo 860 Series is used for pipe- • Enardo Model 960: away aplications while Enardo 960 Series is used for Pressure/Vacuum Relief Valve - Vent-to-Atmosphere vent-to-atmosphere applications.
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Page 4: Product Identification And Marking
Enardo 860 and 960 Series 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 Figure 5. ATEX Certified Markings Product Identification and Marking Principle of Operation Hazardous Locations... -
Page 5: Installation
Pressure Flow Enardo 860 and 960 Series PRESSURE FLOW VACUUM FLOW Vacuum Flow Pressure Flow Figure 6. Pressure and Vacuum Flow Installation 2. Orient valve in desired direction. Enardo △ CAUTION Models 860 and 861 require the pipe-away connection flange to be properly oriented before Ensure the tank is at atmospheric pressure the base is bolted down. - Page 6 Enardo 860 and 960 Series Installing Pressure/Vacuum Relief Valves with Weight-loaded Pallets Note The following steps 1 to 7 apply only to valves that have a weight-loaded vacuum or pressure pallet. These steps do not apply to pallets that are spring-loaded on both the pressure and vacuum sides.
- Page 7 Enardo 860 and 960 Series 5. To adjust valve settings higher than minimum, 7. Attach the valve to the appropriate mating flange use the weights included with the shipment to using proper gasket. To ensure proper function, increase the pressure setting. Weights are packed install the valve to a level horizontal surface so the separately within the unit shipping package and are pallet will move vertically.
- Page 8 Enardo 860 and 960 Series ENARDO MODEL 860 ENARDO MODEL 860 SPRING LOADED PRESSURE/ WEIGHT LOADED PRESSURE/ SPRING LOADED VACUUM SPRING LOADED VACUUM ENARDO MODEL 861 ENARDO MODEL 963 SPRING LOADED VACUUM SPRING LOADED VACUUM SPRING LOADED VACUUM SPRING LOADED VACUUM SPRING LOADED VACUUM PIPE-AWAY SPRING-LOADED PRESSURE/VACUUM RELIEF VALVE ENARDO MODEL 960...
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Page 9: Maintenance
Determine if the pressure/vacuum relief valve the cap screws are loosened, the spring assembly is an Enardo 860 Series pipe-away is still under load. in-line configuration or an Enardo 960 Series vent-to... - Page 10 3. Follow steps 2 to 13 from the Enardo 860 Series 10. If the valve is fitted with a screen of some type, Pipe-Away Maintenance section on page 7.
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Page 11: Weight Information
Emerson offers several different sizes of pressure/ vacuum relief valves. To ensure that the right weight is A damaged valve may require replacement of the... - Page 12 Technologies, Inc. All rights reserved. 02/22. 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...