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8.9. Burst Discs 1-1/4"-style |
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8.9.1. 1.25"-style disc with chamfered edge to seat on BS.029.VI75 o-ring provided.            Usually made in alloy C-276; others on request. Bore is nominal 1.25" (32mm).            Thread is 1.75"-12UN-2A. Thickness 5/8” (16mm).              This is the common form for these discs. |
| 8.9.1. Burst Discs 1.25"-style - Chamfered Seat for o-ring |
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8.9.2. 1.25"-style disc with carried BS.127VI75 o-ring provided.            Usually made in alloy C-276; others on request. Bore is nominal 1.25" (32mm).            Thread is 1.75"-12UN-2A. Thickness 0.787” (20mm).              This is the less common form for these discs. |
| 8.9.2. Burst Discs 1.25"-style - Carried o-ring |
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