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Recent content by cranekiran

  1. cranekiran

    Quadruple butterfly valve

    Dear Gerhrdl, Why the fourth offset?Is it for torque reduction? Regards, cranekiran
  2. cranekiran

    Torque Value

    Dear Naresh, Bolt tightening torque = D*K*P where D= dia of bolt = say 56mm with pitch 3mm, Core dia=52.15mm P = Bolt tensile load = 0.75 * yield stress ( in N/mm2)* area ( which is 3.14*52.14sq/4) consider yield stress as 900 N/mm2 ( for class 10.9) Therefore P= 1442235 N K = Plain...
  3. cranekiran

    VALVE WORLD EXPO!!

    Hi all, I am now in Maastricht attending the valve world Expo,Anybody in valve forum can contact me.Today is the last day of the expo.It is really good to be here. I am at stall no. 1803 bye, cranekiran
  4. cranekiran

    Bonding Adhesive for epdm,nitrile rubber with s.g iron?

    Dear all, Are there any good Bonding adhesives that will bond epdm or Nitrile rubber with s.g iron/stainless steel?.This bonding has to be almost as good as a vulcanised one since the rubber acts as a sealing for hydro-pressure upto 30 bars. thanking in advance. cranekiran
  5. cranekiran

    Factory Mutual Certification necessary??

    Hi, We did a FM and UL(Underwriters Lab.)testing on Ductile iron valves meant for the fire fighting systems for U.S.A The testing was more stringent than the normal testing standard meant for the valves.(As I found out in comparision with MSS-SP67) I am told that the insurance companies in...
  6. cranekiran

    Grooved Knife gate valve !!! Any Answers??

    Thanks canuckminer, I saw the valve in the web-site you mentioned.At least now I know that there are similar types existing in the industry.Like you mentioned No standard given but only the Material of Construction. I guess these are manufacured purely from the manufacturer's standard and the...
  7. cranekiran

    Grooved Knife gate valve !!! Any Answers??

    Thanks generalblr, But the Problem is we ourselves are manufacturers!!The point is I am on a project to develop a Grooved type knife gate valve and at present at a loss to start with what?Eventually I will arrive at a solution myself but it will take a longer time to start with this one without...
  8. cranekiran

    Grooved Knife gate valve !!! Any Answers??

    Dear all, I put this question in the valve forum but unfortunatly no answer as of now.So I am trying my luck here. Is there any design standard for Grooved Body type knife gate valve(face to face,O.D,I.D)? There are Standards for Grooved type Butterfly valve like MSS-SP67 & ASMEB16.10.But...
  9. cranekiran

    VALVE BODY SHELL STRENGTH CALCULATIONS

    Hi, The Shell strength as per Pr-En-12516 is as follows:- 1)First determine the Body shell thickness as per:- Ec=di x p / (2xf-p)xkc (x means multiply) where,Ec=shell thickness in mm di=Body Bore in mm p =Pressure in Mpa =(0.1 x bars) f=Allowable stress in Mpa...
  10. cranekiran

    STANDARD FOR GROOVED BODY KNIFE GATE VALVE?

    Dear all, It's been a long time since I came back to see what's going on here.I found out that I have really missed lot of good advices given by some experts.This forum is really going stronger day by day. I am in search of a standard ( BS-EN,MSS,AWWA,ASME,JIS,ISO or any new valve standard)...
  11. cranekiran

    Equivalent valve standard

    Dear Anegri, Sorry for the belated reply.Actually I was busy on some site work and could not check mail. Many thanks for your in-depth reply for the Equivalent valve standard. Great Reply!!! Thanks,It was usefull.We are procuring all the standards you have mentioned. Bye!
  12. cranekiran

    Equivalent valve standard

    Yes!! I am referring to P.E.D for the hazard analysis. Many thanks for the equivalent standard.One small doubt,if the standard is already designated as BS-EN then it must have crossed the Pr stage or else it would be Pr-En.... Thanks once again.I am Waiting for your next reply!! Bye!!
  13. cranekiran

    Butterfly Valve Material

    Hi, Yes,You can use Cast iron as the Body material for the Butterfly valve in Question. Refer BS:5155 & BS:4504 SEC.1&2. Just for advice,The above standards I have mentioned have been or are in the process of withdrawal stage.But there is no harm if you can still get a copy of that. For...
  14. cranekiran

    Equivalent valve standard

    Hi, I would like to know from this forum the equivalent British En standard for ASME-B 16.34,specifically the temperature/ pressure rating for different classes of valve body materials.Also it will be very helpful if you can give me the ASME standard for the hazard analysis of valves...
  15. cranekiran

    hazard analysis

    Dear All, I would like to know the ASME standard for the hazard analysis of valves. Thanks in anticipation.I would appreciate any reply.
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