Maintenance Waukesha Cherry-Burrell
®
Brand W70 Series Mix Proof Valves
Page 22 95-03087 10/2023
Maintenance
Maintenance Intervals
Maintain adequate stock of replacement parts. See the items in
bold beginning on page 41 for recommended spare parts.
Maintenance intervals should be determined by the user and
specific application, based on the following conditions:
• Daily operation period
• Sensoring frequency
• Application parameters, such as temperature, pressure, and
flow
• Product type
• CIP time and temperature
Use the following recommendation as a rough guide:
• For fluid temperatures ranging from 180
°F to 212°F (82°C to
100
°C): approx. every 3 to 6 months
• For fluid temperatures of 140
°F (60°C) and lower: approx.
every 12 months
The values listed above are only general guidelines and do not
apply, for example, to fluids which crystallize on contact with air.
The values listed are subject to the chemical resistance of the
seal material.
W70 Series Mix Proof valves operate best at temperatures below
180
°F (82°C), regardless of seal type.
The maximum temperature of 280
°F (138°C) listed for the seat
seal type is the rating for the elastomers only, in a static
condition. This is not the temperature rating for the valve in
operation.
The 180
°F (82°C) max. rating also applies to valves welded
together in a manifold. Operating W70 Series Mix Proof valves at
temperatures above 180
°F (82°C) could result in shortened life of
elastomers and/or erratic valve operation.
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