Page 4 95-03087 10/2023
Table of Contents Waukesha Cherry-Burrell
®
Brand W70 Series Mix Proof Valves
Warranty ................................................................................................................... 6
Shipping Damage or Loss ........................................................................................................6
Warranty Claim ........................................................................................................................6
Safety ........................................................................................................................ 7
Care of Component Materials ................................................................................. 8
Stainless Steel Corrosion .........................................................................................................8
Elastomer Seal Replacement Following Passivation ...............................................................8
Introduction .............................................................................................................. 9
General Information .................................................................................................................9
Factory Inspection ....................................................................................................................9
Models and Specifications .......................................................................................................9
Equipment Serial Number ........................................................................................................9
Operating Parameters ............................................................................................................10
Seal Compatibility .....................................................................................................10
Seat Options ..........................................................................................................................11
Pressure Ratings ....................................................................................................................11
W70 Series Mix Proof Actuator Air Volumes ..........................................................................11
Installation .............................................................................................................. 12
Location ..................................................................................................................................12
Welding Instructions ..............................................................................................................12
Air Supply ...............................................................................................................................12
Flow Direction ........................................................................................................................12
Fittings ....................................................................................................................................13
Pipeline Support .....................................................................................................................13
Installing Valve Manifolds .......................................................................................................13
Installing the Valve ................................................................................................................13
Quality of Control Air to Control Module .................................................................................14
External Flush - Liquid Vent Cavity ........................................................................................14
Liquid Vent Cavity Only .............................................................................................14
Liquid Vent Cavity and Lower Stem ..........................................................................14
External Flush - Steam Vent Cavity .......................................................................................15
Steam Vent Cavity, Upper and Lower Stem .............................................................15
Installation .................................................................................................................16
Function ....................................................................................................................16
Operation ................................................................................................................ 17
Solenoid Valve Port Connections ..........................................................................................17
Automatic Fail-Safe System ...................................................................................................18
Test Procedures .....................................................................................................................19
Positive Fail-Safe Detection Test ..............................................................................19
Corrective Action .......................................................................................................19
Valve Operating Conditions ...................................................................................................20
Valve Open ...............................................................................................................20
Valve Closed .............................................................................................................20
Valve Closed, Upper Seat Lifted ...............................................................................20
Valve Closed, Lower Seat Push (for W72RS/W72RSP Series Only) .......................21
Valve Closed, Lower Seat Lift (for W71/W73 Series valves only) .............................21
Maintenance ........................................................................................................... 22
Maintenance Intervals ............................................................................................................22
Inspection ...............................................................................................................................23
Lubrication ..............................................................................................................................23
Cleaning .................................................................................................................................23
Cleaning-In-Place (CIP) ............................................................................................23
Seat Cleaning Adjustment ......................................................................................................25
Lower seat .................................................................................................................25
Upper seat .................................................................................................................25
W72RS Lower Stem Measurement ...........................................................................26
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