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Need to find information on gate valves

I am a college student and currently learning on how a cast iron gate valve works i need diagrams to print off for my portfolio and to learn how to take one apart and how to maintain a gate valve i would be greatful for any information thanks

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Hi robert garet,

I'm Harvey the Master Plumber.

Your problem is: You are a college student and currently learning on how a cast iron gate valve works you need diagrams to print off for my portfolio and to learn how to take one apart and how to maintain a gate valve you would be greatful for any information thanks

For small valves, it's just a mater of unscrewing the bonnet (top part with handle), with larger valves, you remove the bolts around the bonnet. Always turn off the pressure in the line before maintenance. If there's a leak where the shaft comes out of the bonnet then you need to replace the packing material inside the bonnet. This is usually a good time to put some apropriate lubricant on the threads at the botom of the shaft. That's about it from a practical point. I don't happen to have any pictures but you can take them yourself at any plumbing supply or they might let you fotocopy the expanded pictures in their parts book. They're usually happy to oblige.

Feel free contact me again!
Please give me a rating here at fixya before you sign off
Thank you,
Harvey your Master Plumber

Posted on Oct 15, 2008

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