Armstrong FTV Installations- und Betriebsanleitung - Seite 2
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1.0 - INTRODUCTION
The Armstrong Model FTV Flo-Trex Combination Valves are designed for installation on the discharge side of
centrifugal pumps. The Armstrong Combination Valve incorporates three functions in one valve:
• Drip-tight shut-off valve
• Spring-closure design, non-slam check valve
• Flow throttling valve
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1.1 - WARNING
These instructions must be read, understood and followed before attempting to install, maintain or operate this
equipment. Otherwise severe personal injury or damage to equipment may result.
Before installing the Flo-Trex valve, make sure that there is enough room provided to disassemble the valve
for maintenance.
Before undertaking any maintenance on the Flo-Trex valve, it must be isolated from the system line and any
pressure must be allowed to normalize to atmosphere.
Valves that remain in one position for long periods of times may be subject to some degree of reduced
operability as a result of loss of effective lubricants in threads, aging of gasket, surface corrosion of moving
parts, or accumulation of foreign solids. Refer to this manual's recommended maintenance section to maintain
valve performance.
2.0 - INSTALLATION
The valve should be mounted to a spool piece on the discharge side of the pump. Spool piece length is based
on a minimum recommended space of 2 times the pipe diameter (e.g.: 350mm discharge requires 350mm D x
711mm L spool piece).
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1. Body
2. Cover
3. Valve Seat
4. Disc
5. Disc Holder
6. Lower Stem
7. Upper Stem
8. Spring
9. Guide Bushing
10. Handle
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