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  • Users: hyari
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  1. hyari

    water meter couplere Suppliers

    Hi . Any body has an idea about some suppliers of the couplers for the domestic water meters ? in the market we have CONEX UK , so am looking for other brand good quality and competitive . Thx in advane Ahmad
  2. hyari

    Wrapping tape for DI pipes - corrosion protection

    Dears , we have one project and they need wrapping tape . the material we have is Butelyen PE/RUBBER with 0.8 mm thickness , but the specs of the project is called fro PVC Butmen type thickness 1.1 mm ! So how can i approach the client to approve my tape and from your point of view which...
  3. hyari

    Ductile iron disk butterfly valves Vs stainless disk

    Hi , what is the main difference in DI disk and stainless steel disk of butterfly valves ? in case the applications are TSE OR SEWAGE and what is the advantage / disadvantage of both Thx Ahmad
  4. hyari

    Needle Valves

    Hi , What is the purpose of using Needle valves instead of other valves like gate and butterfly ? any specific application for the needle valves ? and what is the advantages . Ahmad
  5. hyari

    Flanges Vs Drilling of the valves

    Hi , What is the difference when they mention - FOR EXAMPLE - ( the valve flange according to EN1092-2 & the drilling to DIN 2501-PN 10 ) 2ND question , how can i know if the valve is matching with the flange ? shall i check the PN Drilled or what ? Ahmad
  6. hyari

    motorized actuators noise for butterfly valves

    thx all ahmad
  7. hyari

    motorized actuators noise for butterfly valves

    Dear LittleInc , which kind of information i can provide ? Ahmad
  8. hyari

    motorized actuators noise for butterfly valves

    Hi , at one site the is abnormal sound from the actuators comparing to other actuators , note that these are installed on butterfly valves any one can knows the reason ? Ahmad
  9. hyari

    ball valve seat and ball damage

    HI , its new valve , we can say 7 months what do you mean by 2 part or 3 parts ? its ball valve PN16 fluid : water , application : used in tanker filling station for the drinking purpose. what is the difference between Floating and trunnion ? the leake from the seats AHMAD
  10. hyari

    ball valve seat and ball damage

    yes we installed the valves and after operation the seats are damaged ! the picture showing the body seat inside the valve . from your point of view this is reason of the damages ? Ahmad
  11. hyari

    ball valve seat and ball damage

    Thx , Actually am a distributor and we purchase the valves from one factory and delivered to the site , all valves are inspected and we are sure about that, the damage of the seat is clear , attached some pictures do you think water hummer happened in the operation and damage the material ...
  12. hyari

    ball valve seat and ball damage

    dears , we have one problem at one site , we are using ball valves DN80 , the contractor sent us back a report mention that most of the seats and balls are damaged !! the factory said that all valves are tested 100% before delivery , so what is the reason behind that ? Ahmad
  13. hyari

    Extension spinndle

    Dears , What is the different between Hollow , rigid & telescope extension spindles for the valves applications ? Ahmad
  14. hyari

    Butterfly valves

    thank you , but any more clarification regarding above points ? Ahmad
  15. hyari

    Butterfly valves

    Hi , one of the client asked about double eccentric butterfly valves Duplex SS disk with some additional data and accessories as below , 1. Density value ( 1.5 kg/cubic m ) 2. shut of pressure ( 12 bar ) 3. Compressibility (0.09956 ) 4. Actuator stroke time ( 300mm per minute ) motor operated...
  16. hyari

    dissmantling joint , flange adapter and coubling

    Hi , what is the purpose of using dismantling joint , flange adapter and coupling in the water networks and when they use each one ? Ahmad
  17. hyari

    Rising stem VS OS&Y valves

    Hi , is there any difference between the Non rising stem valve & OS&Y valves ? i see some time some ppl used rising stem description and others use OS&Y valve description Thx Ahmad
  18. hyari

    Double Eccentric VS concetric Butterfly valves

    Dear Engineers / designers / experts ; where is the cases/applications you propose double eccentric butterfly valves or concentric ? and why ? am talking about (( TSE lines - potable water lines - sewage plant , etc .. sizes from 300mm to 2000MM Regards Ahmad
  19. hyari

    Buttterfly valves specs .

    Dear gerhardl , Thx Again , totally agreed ! but the disc am trying to convene is ductile iron not cast iron ! therefore , any strong/convinced technical points to argue with the end users to use ductile iron disc against SS one? any proof that material will fit the requirement ? Regards Hyari
  20. hyari

    Buttterfly valves specs .

    Dear Danlap, TSE water is clean not same sewage ! am talking about the pipes network from the plant to for example to irrigation uses ! the stainless steel is SS316 S31 and the seat AS well . By the way , the Butterfly valves is eccentric double offsite type Dear Gerhardl ; The size is...

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