ENGINEERING.com has updated it's forum.  To post a question please visit the new Ask@ Forum.   

With a database of over 10000 questions the library will remain available for an extended period.
Q&A


satish kumar		 what is the difference between a lug type butterfly valve and wafer type butter fly valve. View All


14 years ago - 8 months left to answer. - 1 response - Report Abuse
Respond to question
    0      [lnkReport]        0       0       
Share |
  Responses

Niel
 The difference between a Wafer and Lug type Butterfly valve is only the mounting scheme [1] and [2].

Lug type valve as the name suggests has lugs that are used to mount the valve to lugs that are attached the flanges on then ends of sections of pipe so that each length of pipe can be removed and replaced independently. Typically there are 8 or 12 lugs where 4 or 6 lugs are used to connect the each pipe section.

Wafer type valves don't have attachment lugs, though them may have alignment lugs. They are sandwiched between the flanges on the ends two lengths of pipe. To replace either length of pipe requires shutting the system down.





14 years ago

Source: [1] http://en.wikipedia.org/wiki/Butterfly_valve

[2] http://www.jereh-oilfield.com/products/prod/newimages/Butterfly%20.pdf



  0     0         

ENGINEERING.com does not provide engineering advice. The Ask@ service is a forum for members to exchange ideas relating to the world of engineering. We caution users not to accept any responses that they receive without further validation, and not to rely on any engineering advice that they may get from other members of the Ask@ forum. ENGINEERING.com specifically disclaims any obligation to validate or verify any information posted within the Ask@ service. ENGINEERING.com encourages users to seek the services of a professional engineer for any engineering advice they may require.