I would like to get the weight of 18" butterfly valve. Lug type.

Glindepp

http://wsftc.com/product/data/high-performance.pdf

Hope this helps. A little googling and thats it.
good luck.

weights of many valves, including lug-type butterfly valves, are vendor-specific. Also, don't forget the actuator weight!

Quoted for emphasis. I have a dozen-plus vendor files for stuff like this and growing. Make sure you get the right type, make, manufacturer, etc. if this is critical information.

How do we design suction and discharge line for motor or compressor analysis.

Glindepp,

Your question should be in a completely different thread. No one is going to see this unless they happen to be interested in "bufferfly valves".

I'm closing this thread.