Burst Disk markings?

[beanojones]

Burst Disk markings? Anyone know how to decode burst disk markings?

I got one labeled M38.

 

[widget]

Where is the M38 beanojones, on the loose disc plate itself (ie) there are three loose parts to the unit, the disc the washer and the securing bolt or is it one of the new types of burst discs where the disc and bolt are all in one assembly, Ie - One Piece assembly.? and the M38 is stamped on the securing bolt.?

 

[beanojones]

Where is the M38 beanojones, on the loose disc plate itself (ie) there are three loose parts to the unit, the disc the washer and the securing bolt or is it one of the new types of burst discs where the disc and bolt are all in one assembly, Ie - One Piece assembly.? and the M38 is stamped on the securing bolt.?

It's a three piece type, with no identification on the securing bolt. The only sort of ID I can make out is that M83 (I think) that is printed in blue on the copper disk.

(I really like one piece burst disk assemblies that have the burst pressure stamped on the outside bolt. This is not one of those, unfortunately.)

 

[pescador775]

M38 is Sherwood's part no for 2400 psi service, I think.

Edit: confirmed disk is 2400 psi. Here are the codes:

M 28...1800
M 32...2015
M 35...2250
M 38...2400
M 48...3000
M 50...3300
M 49...3500

The code no represents the approx BP, eg, M 38 = 3800 psi

Pesky

 

[beanojones]

M38 is Sherwood's part no for 2400 psi service, I think.

Edit: confirmed disk is 2400 psi. Here are the codes:

M 28...1800
M 32...2015
M 35...2250
M 38...2400
M 48...3000
M 50...3300
M 49...3500

The code no represents the approx BP, eg, M 38 = 3800 psi

Pesky

Thank you very much. Did you have that in a reference somewhere?

 

[SparticleBrane]

Sherwood Scuba Valve overhaul manual as of 2001. It isn't exactly what you're looking for, but close. See page 8.

 

[widget]

AAH, I see you got to it first pescador - yes its as you say, its a Sherwood burst disc and its 2400psi.

I have hundreds of M48 discs here all 3000psi burst rating.