Gasket Packing Q&A No. 16 Spiral Wound Gasket
Is the inner ring of a spiral gasket necessary? What are the advantages over just having the outer ring?
The spiral gasket is used for high pressure, which can cause the sealing part of the spiral gasket to buckle. As a countermeasure, the use of inner and outer rings is recommended. By using an inner ring, deformation of the sealing part at the inner diameter is prevented. ■Example of a problem 〇 Leakage occurred from the vortex, and when the flange was released, the gasket was deformed as shown in the photo. ■Possible factors 〇 The flange was class 900 (63K) or higher, resulting in a large tightening force. 〇 The flange size was large (26B or more), making the gasket body prone to disassembly. ■Countermeasures 〇 When using graphite or Teflon fillers, use inner and outer rings. 〇 If the diameter is large, use inner and outer rings.
- 企業:ダイコー 本社
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