We are currently upgrading a flotation reagents preparation system which involves SIPX,Copper sulphate,sodium cyanide & lime.
As I have read a typical system would include a mixing tank & a holding tank.
Currently our client doesn't have a holding tank and uses two tanks that operate as mixing...
Dear georgeverghese,
Check valves are only installed at the pumps discharge. At the top of the mineshaft a combination air valve will be installed. Yes the surge pressure happens when both pumps trip simultaneously.
Dear littleInch,
First of all thanks for the quick response.
Yes normmally we will be able to isolate the pump prior to run down / shut off and in the case of an accidental pump trip air valves and a pressure vessel would act as surge protection.
Would you still prefer non slam over swing...
Dear LittleInch,
Yes the application is pumping water up a mine shaft (lucky guess or succesful searching I presume [bigsmile]). The issue is the selection of the proper type of check valve.
Additional info: max surge pressure around 60 bars, multistage centrifugal pumps, isolation valves...
Dear all,
We are looking for the suitable type of a check valve to be installed at the discharge line of a VFD controlled pump. Our first thought was to use typical swing check valves but as I have read in some posts herein a lot of colleagues suggest the use of non slam check valves (e.g noreva...
LittleInch,
First of all thanks for the reply. I was thinking that slip on flanges are the cheaper option because my client wishes to manufacture the fittings by himself and at this case, after his demand, labour cost is not included in the budget. So in terms of capital cost only slip on are...
Penpipper,
Yes my mistake, the maximum operating pressure is 25 bar but still the maximum operating temperature is 40°C. Regarding your recommendations, I think that this is the best solution. Still I have one last question.
Because of the low pressure I'm thinking to use slip-on flanges. Are...
Penpipper,
First of all thanks again for your valuable help.
1. What is the Commodity?
The design has to do with a pumping station of a tailings management facility seepage collection pond.
2. What is the maximum Operating Temperature?
40°C
3. What is the maximum Operating Pressure?
16 bar
4...
Pennpiper,
The problem is that my customer wants workshop drawings for each fitting. Let me ask you one more question
You wrote "It will depend on the Pressure and temperature of the commodity". Is there a problem using B16.9 and two flanges at the end? You mean that the working pressure of the...
Dear pennpiper,
First of all thank you for your quick response. I've seen some of the suppliers of rubber lined fittings but I wasn't able to understand which code they use. As I'm not responsible for the supply of the fittings I need only to deliver an iso of the piping connections and the...
Hi all,
My customer requests to design its pumping station connections with rubber lined flanged fittings. Though the flanged fittings in accordance with B16.5 are tabulated and dimensions are given I don't know whether there are suppliers that fabricate them. The other solution I was thinking...
Dear all for rough modelling purposes I'm looking the following info regarding a 12" class 300 swing check valve:
-Cv value or Cv % vs time chart.
I can only find from datasheets a single Cv value but the software needs a chart Cv vs Time something like that:
Time(sec) Cv
0...
Dear all,
This is the first time I'm involved with rubber lined piping so probably I'm looking for the fundamentals.I have the following questions.
-Rubber lined flanged fittings can be made of B16.9 fittings and B16.5 slip-on raised flanges ?
-Flanged joints need gaskets ?
-Regarding lining...
Dear Apetri,
Maybe I wasnt't so clear. I'm trying to make a comparison between fluidflow3 & the combination of AFT Fathom+AFT Arrow so as to cover most of the applications (liquid,gas,slurry etc.)
Dear all,
First of all thank you for your useful replies.
To be honest money isn't an issue. The difference is about 3k. As written before after extensive search the firm I work for has narrowed down to FluidFlow3 or AFT.
I'm looking for users of these software that can share their experience.
