KEYSTONE
Hygienic butterfly valves model F250 & F251
Installation & Maintenance Instructions
Pentair reserves the right to change the contents without notice
EBPJV-0765-EN-1305
1
Contents
1 Contents
1
2 Introduction
1
2.1
Valve use
1
2.2.
Application area
1
2.3.
Incorrect use
1
3. Safety
2
4.
Transport and storage
2
5.
Installation instructions
2
5.1. Mounting
2
5.2.
Installation into pipe work
2
6.
Cleaning and maintenance
2
6.1. Cleaning
2
6.2. Lead-time
2
6.3.
Safety measures during maintenance
2
6.4.
Grease to be used
2
6.5.
Disassembling the butterfly valve
2
6.6.
Disassembling the wafer style butterfly valve
3
6.7.
Assembling the butterfly valve
3
6.8.
Assembling the wafer style butterfly valve
3
6.9. Failures
3
Appendix A - Technical specifications 4
Butterfly valve ordering code
4
Butterfly valve material
4
Seat and flange seal material
4
Liquid operating pressure
4
Operating temperature
4
Air supply actuator F257
4
Appendix B - Assembly drawing F250 & F251
5
Parts and spare parts
5
Ordering (spare) parts
5
Appendix C - Assembly drawing F250 & F251 wafer style
6
Parts and spare parts
6
Ordering (spare) parts
6
Appendix D - Actuator F257
7
Mounting parts
7
Actuator mounting
7
2 Introduction
2.1 Valve use
The Keystone F250 and F251 hygienic butterfly valves are universal valves for manual or automated
isolation and control.
2.2 Application area
The butterfly valve has been designed for use in the food & beverage, pharmaceutical and light
chemical industries.
2.3 Incorrect use
The butterfly valve is not suitable for use in gas systems.
Liquids with hard solid parts cause increased wear to the seat.
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