Internal piping inspection or unblocking as valve cannot be closed
Internal piping inspection or unblocking as valve cannot be closed
(OP)
I have a 700mm gate valve that is not sealing for whatever reason and would like to know of a method or company that can put a camera inside a main while under pressure to inspect the valve gate/seat and possible jet or remove debris.
Many options have been looked at but the main condition is that we cannot drain that system down. Freezing and line stops have been considered but are our last option.
Flow is zero (water is not moving).
Pressure is 4.5barg.
Medium is soft water.
Pipe diameter is 700mm.
All sensible comments greatly appreciated.
Many options have been looked at but the main condition is that we cannot drain that system down. Freezing and line stops have been considered but are our last option.
Flow is zero (water is not moving).
Pressure is 4.5barg.
Medium is soft water.
Pipe diameter is 700mm.
All sensible comments greatly appreciated.





RE: Internal piping inspection or unblocking as valve cannot be closed
Based on what you've told me I would assume that the seat is worn and the valve needs to either be refurbished or replaced.
You could "jet" the valve by almost closing it and allowing the increased velocity through the seat clean it out.
RE: Internal piping inspection or unblocking as valve cannot be closed
2) If not consider hot or cold tap with valve - You don't say what your pipe is made of
3) Once you have a valved way in then you can find a steerable camera accesible via an entry point - there's quite a few
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Internal piping inspection or unblocking as valve cannot be closed
Valve has only been installed upto 18 months ago, unsure of previous operation but surprised if seat is worn.
Valved branch not a problem. Any UK companies used for steerable cameras?
Thanks for all responses.
RE: Internal piping inspection or unblocking as valve cannot be closed