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Applications of Concentric vs Eccentric-Disc Butterfly Valves 2010-12-01
Concentric butterfly valves are OK for utility service, these are soft seated or rubber lined valves. Generally disc is permanently in contact with seat.
vee-ball valves versus butterfly valves 2010-12-01
Apart from from COST, any there any reasons that vee-ball valves would not be acceptable or better than butterfly valves for process air lines in bioreactors on Wastewater Treatment Plants?
API 682 for rotary valves packing 2010-11-30
I was informed that API Std.682 states the specifications for the QUALIFICATION TEST on shaft sealing system for rotary and centrifugal pumps.
Closing torque for a butter fly valve 2010-11-30
First you should calculate the total torque adding the 3 torque values.1)Seal friction torque:- This depends on the Torque due to the friction between the Disc seal & the inner dia. of body.
Butterfly or gate valve for siphon spillway 2010-11-30
The spillway will be for emergency draw-down only. Under normal conditions the flow is regulated through a spillway channel at one end of the dam.
Butterfly Control valve 2010-11-29
A 6" Jamesbury controlled butterfly valve installed in a 8" line supplying water to a tank. The line has conc.
butterfly valve II 2010-11-29
1. Some valves like Durco BX6 Series Metal seated valves meet ANSI FCI 70-2 Class VI leakage.
Butterfly Valve Material 2010-11-29
Cast Iron for Butterfly Valve Body for PN25 DN500-1600? do you have better material to recommend to me?
