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Hydropower ball valve - High Head, silty water 2010-10-22
With 700m head and 5cms flow (1000psi, 80,000gpm) and the water is fairly silty. The original was a trunion mounted ball valvetalking about an ANSI Class 600 equivalent valve (1440 psi rated pressure
12" Force Main-Ball Valve vs Gate Valve 2010-10-22
We have an office argument going about the use of ball valves versus gate valves on a sewer force main.
Cone/Ball Valve 2010-10-22
The size of this Ball Valve is 18" and it will be installed in a pump station. I have concern regarding how to control/set the emergency closing speed (seconds) and if it is really necessary.
OS&Y Valves NFPA requirement 2010-10-21
"A listed outside screw and yoke (OS&Y) gate valve shall be installed in the suction pipe. No valve other than a listed OS&Y valve shall be installed in the suction pipe within 50 ft (16 m) of the pum
Soft seat material 2010-10-21
Nylon, PTFE, RPTFE, Devlon & PEEK. Some sites will include many plastics that you should consider. You will find lots. Consider a few thoughts beyond the valve manufacturer.
Valve Seats 2010-10-21
Require a 6" 1500# ball valve the current datasheet specification gives the seat material as REINFORCED TEFLON(PTFE + 15% FIBER GLASS).
Actuator type for shut off valve 2010-10-21
First consideration for an on-off valve is to get enough force to cause the flow to stop. That is dependent on the valve.
PTFE for high performance butterfly valve 2010-10-21
The valve should be used below 300 psi and 410 F.For that pressure and this temperature, 100% PTFE is out of limits, since pure PTFE temperature resistance ends at 200dC, and you operate at 210dC.
