Table of Contents
Advertisement
Waukesha Cherry-Burrell
Operation
Solenoid Valve Port
Connections
Table 1: Solenoid/Valve Position
Solenoid
Condition
3
Closed
OFF
Open
OFF
Upper Seat
OFF
Cleaning
Lower Seat
ON
Cleaning
Figure 5 - Solenoid Valve Port Connections
August 2008
All functions of mix proof valves are pneumatically controlled using a 72 to 100
psi (4.9 to 6.9 bar) clean air supply.
The valve contains a large and small spring in the valve actuator. The springs
hold the valve seats in the closed position.
Large Spring
•
Located in the top air chamber of the cylinder.
•
Holds the upper plug in closed position.
Small Spring
•
Located in the extended hub of the upper piston.
•
When the valve is open, the spring only acts on the upper seat stem to hold
the upper and lower plugs together.
•
When the valve is closed, the spring holds the lower plug in closed position.
Typically three air supplies controlled by solenoid valves supply air to the valve
actuator (Figure 5).
The air supply must be 72 to 100 psi (4.9 to 6.9 bar).
ON = Solenoid energized (OPEN).
OFF = Solenoid de-energized (CLOSED).
1
2
Solenoids are normally closed.
OFF
OFF
Air connections are 1/8" NPT.
ON
OFF
OFF
ON
OFF
OFF
Figure 6 - Location of Solenoids
95-03076
Operation
Page 11
Advertisement
Table of Contents
