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  • Users: thought2007
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  1. thought2007

    Self locking in Compound spur gear train

    Hello, I were going through Electromechanical actuator document which is driven by DC Motor with Compound spur gear train. But the system demands self locking feature after actuator reach 90deg rotation.My Question is there any possibilities of self locking with compound spur gear train...
  2. thought2007

    AGE00003 guideline for Ball valve

    Hi, I am designing Fire shutoff valve used in aircraft. I come across "AGE00003 guideline" which is used for designing the Valve. Would request experts here to throw light about what "AGE00003 guideline" document contains. Thanks in advance John
  3. thought2007

    ball valve actuation torque estimation using CFD tool

    Industrial expert's opinion is maximum torque required to actuate ball valve is "Torque ability to open under large differential pressure and to close under high flow conditions " My objective is to determine Actuation torque Vs Pressure drop curve (through digital prototyping) using CFD...
  4. thought2007

    Actuation Torque Vs Pressure drop curve for BALL VALVE

    Industrial expert’s opinion is maximum torque required to actuate ball valve is “Torque ability to open under large differential pressure and to close under high flow conditions “ My objective is to determine Actuation torque Vs Pressure drop curve (through digital prototyping) using CFD...
  5. thought2007

    Max pressure during closing of the ball in Ball valve

    Hello, I am estimatning theorotical torque for Ball valve actuation.Is there any empirical formula exists to find out max pressure during closing of the ball. Is follwoing formula can be used to find drop Delt P= density of fluid*Speed of sound in fluid*Velocity of fluid/gravitational force...
  6. thought2007

    Seating load for Ball valve

    Hi, how much seating force required to control leakage for following requirements. Allowable leakage when closed condition is 0.5cc/min. The seating material used is Teflon Operating pressure is 60psig Differential pressure when closed condition is 70psid Earlier i were trying with yeild...
  7. thought2007

    Analytical Ventury design approach for finding Cd (coeff.dis) value

    Hello, Would like to know whether the following analytical ventury design approach is correct or Incorrect to find Coefficient of discharge. Following are the available design data to find Cd 1.Geometry of flow path is defined (throat dia Diametrical ratio "Beta") 2.Upward flow data is...
  8. thought2007

    Pressure drop in ventury flow model

    Hi I have question on Pressure drop in ventury flow model Is pressure loss at convergence & Orifice going to regain at divergence.The flow path is horizontal,length of convergence and divergence is same Operating pressure:60psi Fluid temp : -56degF to 230degF Flow rate : 18gpm Fluid ...
  9. thought2007

    Design Books for Fire shutoff valve for aerospace application

    I am working on designing of fireshutoff valve(Motor operated ball valve)for Aerospace application.size is 7/8inch valve. would appreciate your suggestion for considering reference books for design
  10. thought2007

    Gasket material for FSOV

    Hello, What good gasket material is avaialble for Fire shutOff valve. Would appreciate lead suggestion for below requirements. Operating temp ;607degF to +230deg F Fluid : MIL-PRF-5606 Opearing pressure : 90psi John
  11. thought2007

    Use of Fire Shutoff valve in aerospace

    Hello, Some literatures states as FSOV is used in the suction line of Engine driven pump(EDP). Would request experts here,what is exact application of FSOV.Does that mean FSOV isolate flow if there is any fuel fire & engine fire.If that is the case any possibilities of fire of FSOV. Is there...
  12. thought2007

    Leakage in Ball valve

    Hello! I am finding leakage in ball valve,when it is in closed condition. The Teflon seat is loaded by spring force from either end of ball(Inlet & outlet flow). However experts opinion is at cold flow(-20 degF to +275degF)),Teflon doesnt give good sealing. My question 1.what are the...
  13. thought2007

    MIL-standard for Rotary seal selection

    Is MIL-G-5514 is used for selection of rotary seals However this standard refer only for static seal selection Is there any other standard available for selection of rotary(dynamic) seal
  14. thought2007

    NAS standard disc spring

    Which aersoapce standard is used for selection of disc spring or Bellevelle spring Would like to know Aerospace supplier Name or websites around North america region
  15. thought2007

    Guide line for ball diameter selection in BALL VALVE

    Hello I am designing Fire shutoff valve(Ball valve) Is there any guidelines available for selection of ball diameter in ball valve And is there any relation available for orifice diameter to ball diameter. Thanks John
  16. thought2007

    Ball valve flow rate & pressure drop

    In ball valve is Bernoulli principle used to estimate the values flow rate & pressure drop estimation And what will be the difference with ventury flow path & Straight flow path
  17. thought2007

    lift

    Hi all In poppet type check valve,what are the parameteres needs to be considered in deriving parameters like LIFT,ORIFICE DIA.If any one explain by giving examples is appreciated thanks in before John
  18. thought2007

    check valve

    Hi, Hi All. I am interested in reverse engineering of solenoid valve.Please anyone throw light on solving the follwing problems In Poppet type check valve how to determine dimension, the distance the poppet rises out of its seat.I am intersted in calculating correct amount of lift for...
  19. thought2007

    valve body hogout model

    Hi, I have been asked to hogout design of present valve body (cuz in earlier model customer experianced low yield strength of casting ),customer given me requirements of hogout body must satisy all design intents including flow/pressure drop,material strength & envelope requirements. What...
  20. thought2007

    How Commutating valve works

    Hi guyz, I wanna know functioning & application of Commutating valve. Thanks before with regards John

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