Instruction Manual Form 5470 January 1999
Design CVX-A
Design CVX-A Steam Conditioning Valve Contents Introduction
.............................. 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Principle of Operation
................... 3
Valve and Instrumentation Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Piping Considerations . . . . . . . . . . . . . . . . . . . . . . . . 4 Location of Pressure Tap . . . . . . . . . . . . . . . . . . . . . . 5 Location of Temperature Sensor . . . . . . . . . . . . . . . 5 Control Strategies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation
................................ 5
Maintenance
.............................. 6 Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Removal of Valve Bonnet and Trim . . . . . . . . . . . . . 6 Removal and Replacement of Nozzles . . . . . . . . . . 7 Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
Introduction
W7011 / IL
Figure 1. Design CVX-A Control Valve
Scope of Manual
Only personnel qualified through training or experience should install, operate, and maintain a Design CVX-A valve. If you have any questions about these instructions, contact your Fisher Controls sales office or sales representative before proceeding.
Description The Design CVX-A steam conditioning valve, figure 1, provides a convenient and efficient way to reduce steam pressure and temperature within a single device. Typical installations are primarily in the process steam area and other areas requiring small to moderate pressure reduction ratios and water requirements, while desiring dependable and accurate control of steam pressure and temperature.
D102619X012
This instruction manual includes installation, maintenance, and operation information for the CON-TEKR Design CVX-A control valve. Refer to separate instruction manuals for instructions covering the actuator and accessories.