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  1. gorkus

    shaft diameter

    Then First I need to calculate the Torque: In order to get it I use the following formula. Shear stress = 16 *T/pi d^3 Where T = Torque kg*m= (225000/pi)*(Power( cv)/rpm)= rpm 1100 Power 12.7kw *1.36 = 17.272cv I get a Torque of 1124,55 kg*m Shear stress: 85% de tensile stress of F-1140 =...
  2. gorkus

    shaft diameter

    But The viscosity of the fluid is 14 cSt @ 20 ºC?? So once I have the torque I'm going to this formula in order to get the shaft diameter. d= cubic rd [ (16*TORQUE)/(PI * MAXIMUM ALLOWED SHEAR STRESS OF F- 1140)] Is it ok??? maximum shear strees is 77.8 GPA??
  3. gorkus

    shaft diameter

    Sorry the formula is d= cubic rt(16*M)/PI* maximu shera strees If if use this value, maximum shear strees , I work out the diameter of my shaft which is able to endure this torqued. Is it right??
  4. gorkus

    shaft diameter

    I've calculate the torqued: M=225000/pi *N/n ( kg.m) Where: M= Torque kg*m N= Power Cv = 25 ( taking account the viscoity value ) n = rpm = 1100 So the Torqued value is: 1627.71 kg*m Then chosen material is Steel 1140 Where: d= cubit rt [16*M/maximum shear stress *( pi)2*N/n] But...
  5. gorkus

    shaft diameter

    How can I get de diameter of the shaft that you need in this aplication: Speed 1100 rpm. Prssure 7 bar Flow 927 l/min
  6. gorkus

    how calculate the heat generated by a recirculating pump.

    THIS FORMULA IS SUITABLE TO CALCULATE TEMPERATURE RISE IN POSITIVE DISPLACEMENT PUMPS.??
  7. gorkus

    how calculate the heat generated by a recirculating pump.

    YOU MEAN CONVERT FROM KW TO JULIOS....??
  8. gorkus

    how calculate the heat generated by a recirculating pump.

    I'd like to know if exist a formula to calculate the heat generated by a pump recirculating liquid in a short lenth of pipe. Flow: 15 m3/h Length pipe 7 m diameter: 2" Fluid: oil. Thank you very much.
  9. gorkus

    MAX DISCHARGE PRESSURE

    Well so if try to do this job with a volumetric pump , I would have to set the pump internal safety valve 19 or 21.4 barg. Is it right? Diferencial pressure will be 19 or 21.4 barg , ok?? thank you very much.
  10. gorkus

    MAX DISCHARGE PRESSURE

    sorry but is not possible 80 m of gasoil equual 2 bar.??
  11. gorkus

    MAX DISCHARGE PRESSURE

    Operating conditions: product: gas oil Phase: Liquid Max Suction operating pressure: 2.4 bar G Average operating pressure. 6 to 7bar Max discharge pressure ( closed valve): 19 barG Characteristics: required total Dynamic head: 80 m What is the working pressure or differencial pressure ? 6...
  12. gorkus

    SLIP ON FLANGES

    THANK VERY MUCH.
  13. gorkus

    SLIP ON FLANGES

    Sorry By the lack of information. There is a mistake Is for a pump.But the flange is 4" DIN 2576 PN 10.Flow is 10 m3/h,maximum working pressure 10 bar.Working temperature 170ºC How can I get the vaue of the forces ( in 3 axes( xyz)). I think that the forces are caused by the weigth of the...
  14. gorkus

    SLIP ON FLANGES

    I need to know te maximun allowable forces a of 1 1/2" slip on flange 150 # astm a-105.
  15. gorkus

    DETERMINE THE SIZE OF GENERATOR

    how can i get the amount of kva ( SIZE OF GENERATOR) to start a three electric motor of 4 kw.?? Kva = kw/ cos(fi) = 4 /0.85 = 4.70 kva is correct?? THANKS IN ADVANCE GORKUS
  16. gorkus

    CAST IRON AT SUB ZERO TEMPERATURES

    The working pressure is 2 bar the flow is 500 l/h and its grey cast iron , grade gg-20. the pump will be cover with some type of insulation.
  17. gorkus

    CAST IRON AT SUB ZERO TEMPERATURES

    the fluid pumped is car oil
  18. gorkus

    CAST IRON AT SUB ZERO TEMPERATURES

    would be cast iron PUMP(gg-20)able to stand lower temperatures? The pump is going to be installed outside and the temperature could be up to minus 30 deg.C.
  19. gorkus

    NPSH available

    Hello,could you give me any advice?? underground supply tank fluid:ethyl ether. Flow: 7 m3/h Tª= 20ºC T vapor@ 20ºc= 587 mbar density @20ºC= 0.7347 kg/dm3 suction static height=1 mts suction pipe diameter= 37 mm suction pipe length=5 m atmospheric pressure= 920 mbar estimated pipe losses =...
  20. gorkus

    PARALELL PUMPS

    so how can I get the woking pressure for each pump.?? First I calculate the total head value ( of the piping system) and then with this value I go to the curve and I get the power required for each pump.( with its flow, the same each pump) I thougt that the prssure value was The total head...

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