News
News
some way to the selection of valve 2010-10-22
One of the most comprehensive, single-source valve selection sites on the Web is probably The Valve Shop.
Find value in your valve choice 2010-10-22
When selecting a valve for a certain job, why can't just any valve suffice? Perhaps it's enough to choose a valve that's easy to install and operate.
Welding allows the carbon to go back into solution and revert to a cast iron upon cooling. 2010-10-21
Welding allows the carbon to go back into solution and revert to a cast iron upon cooling. While the preheat is advisable, it is doubtful in my opinion that your post weld heat treatment will be adequ
Welding ductile iron 2010-10-21
I have a large ductile iron valve(48" waterway) that is in need of weld repair in the main external support rib of the valve.
Choked Flow in valve 2010-10-21
Hi,I would like to know if choked flow can occur in a valve even if the velocity of air passing through the valve has not reached Mach 1.
Do we have the limitation for trimming the impeller from item 3 2010-10-21
I got this out of a manufacturer's engineering handbook:Critical pressure drop occurs if DP>=Fl^2*(P1-Ff*Pv)Ff=0.96-0.28(Pv/Pc)^.
how can we find that mentioned flow rate? 2010-10-21
1)I have heard that it should not operated the pump with the flow rate at a point where performance and sytem curve intersected (short circuit).
the differential pressure or pressure drop of control valve 2010-10-21
One question still in my mind is that the differential pressure or pressure drop of control valve will be a constant value for minimum , normal, maximum flow or it will depend on the flow rate.
