Burst disc?

[dcpac]

One of my manifolds started having a small leak from the burst disc so I ordered some new discs, washers and plugs. I took the old one out in this order plug, washer, disc and put the new assembly in disc, washer, plug. The new assembly still leaked. Is that the right order or should the washer go in the hole first then the disc and then the plug?



Thanks

 

[Ontario Diver]

One of my manifolds started having a small leak from the burst disc so I ordered some new discs, washers and plugs. I took the old one out in this order plug, washer, disc and put the new assembly in disc, washer, plug. The new assembly still leaked. Is that the right order or should the washer go in the hole first then the disc and then the plug?



Thanks

Sounds right, did you clean all of the gunk off the threads and make sure that the hole is clean?

(Of course, it might just need to be tighter....... )

 

[iainwilliams]

I believe the correct order for fitting is burst disc first, then the washer, followed lastly by the plug. That is the way my tanks have had discs fitted.......Iain

 

[Dive4Life]

Thats how you should put them in. Take care and dive safe and dive often.

 

[guruboy]

Bumping an old thread because I don't think the information is correct and I wouldn't want someone to find it and get the wrong info.

For a 3-piece burst disc setup, shouldn't the order be-
1) Nylon washer
2) Copper disc
3) Plug

?

 

[DENFSEA]

VALVE BURST DISC ASSEMBLIES
Sherwood valves in service use two basic types of burst disc assemblies.
1. Older valves use the small 3/8" hex 3-piece assembly shown in Fig. 1. It is installed into the
valve cavity; nylon washer first, copper disc second, plug body third.
2. All currently manufactured valves use the 1/2" hex 1-piece unit shown in Fig. 2.
Tighten both styles to 50-60 in. Ibs. Apply torque rapidly to avoid gasket deformation.