Re-Rubber lining AWWA C504 butterfly valves

[Herbert2010]

gabislavick (Mechanical)wrote....

"We are contemplating re-rubber lining a number of old (1960s) AWWA C-504 butterfly valves manufactured by the now defunct BIF Co. (New York Air brake). The valves range from 24" – 48" (75 lb class) for use in treated drinking water service. "

Were there any other ideas... I have a similar situation and same valve except 96" and I am looking for a solution.

Did Goodwest Rubber Linning work out

 

[gerhardl]

Re-rubberlining, if original factory or rubber forms does not exist, could be costly and involve fabrication of forms to 'bake' the rubber.

Cost of in/out, transport, cleaning and repair of valves (welding of material?) replacement of parts and other sealings and bearings will also come into consideration in addition to re-certifying and test of the items.

If and when you can find your solution and get the total cost estimate you have to compare this with quality and probable lifetime cost for both new and re-rubbered old items.

As the pressure class are low, and diameter large, it is not impossible that an old valve with excellent material and construction can be repaired within reasonable limits.

What about buying one or two completely new valves to replace old and take one or two of the old out in turn for repair?

Actual condition of the old valves and cost of repair could be tested for both alternatives this way if you have a larger number of valves to be serviced.

 

[Herbert2010]

I agree, the cost of repair will be about 70-90% of the cost and if I had the time to wait (40 weeks plus)I would purchase a new valve.

Unfortunately this is not a luxury I have.

I guess my question is has the gentle that posted this or any other had success in replacing/repairing the liner for temporary repair until the new valve arrives.

 

[QualityTime]

There are a number of companies out there that might do this type of work and they are on the internet. Why don't you contact them and get a client referral list that you can phone up and check out