It seems that customers can never give me this information. I am looking for a way to calculate it with higher confidence than I have.
Consider a tube and shell heat exchanger.
The shell gets steam from a pressurized, saturated steam source. The steam is controlled by a valve before it is...
I try not to be cynical >BUT< I am not seeing a technical benefit to Ethanol.
1. It takes as much energy to make as it returns. There are precious few eco-hybrid tractors and combines out there plowing and harvesting the cornfields, but plenty John Deere Diesels.
2. Cars get poorer mileage so...
A long time ago in a job far away, I encountered an analytical method for calculating the torque of butterfly valves. That library is no longer accessible to me and probably no longer exists. I believe that it was for non-offset discs anyway.
Can someone supply or point me to an analytical...
Can anybody tell me where I can look up a reasonably representative schematic of a natural gas liquefaction process? The boss had some questions and the kind of stuff I am hitting on the web has more-than-vast oversimplification ( e.g.: two tanks and a pump) . Need a little detail; pressures...
My question is about the sequence used in starting a pump.
My customer is using a vertical-shaft pump with a 6" outlet. 800HP motor The outlet piping goes through a check valve and an automated ball valve.Then the line rises 1100 feet.
When they start the pump, the ball valve is closed...
I was just requested to state whether a certain valve meets NFPA 85 criteria. While we are busy ordering the standard, does anybody here know what the requirement would be for a 10" butterfly valve?
Apologies for the lack of additional information, but this is the way the question was asked...
I am wiring a couple of ASCO Explosion Proof (ATEX EExd IIC IP67) solenoid valves. Two valves are mounted so the conduit connections are on a tee, with the third leg of the tee connecting into an explosionproof switchbox on a ball valve actuator.
My question is: Do I need to use sealed cable...
I posted this last year, and got no responses. So I'm gonna' try again.
2 Feb 05 13:08
I am interested in finding out who offered the first valve positioner. The oldest literature I have seen shows the Moore 72. Positioners probably "evolved" more than just appearing in a flash of...
My European affiliates have asked several times for Zeta values. It is supposed to be some sort of flow restriction index, but unlike the inverse of a Cv value, Zeta can be the same value for different sizes of valves.
Can someone please enlighten me as to the definition of Zeta, and how I...
I am interested in finding out who offered the first valve positioner. The oldest literature I have seen shows the Moore 72. These devices probably "evolved" more than just appearing in a flash of inspiration, and I'm really curious about the time-line.
