Spiral Ring Retains Component in Butterfly Valve

A butterfly valve is a valve that regulates flow. The “butterfly” is a disc mounted on a rod or stem that can be turned perpendicular to allow full flow, parallel, to stop flow or increments, to allow a certain amount of flow. This butterfly valve is regulating gas or oil and features a spiral-retaining ring designed to take up the load of the thrust washer.

• Rings are made with rolled flat write that feature edges with a radius so there is no damage to the groove or surrounding material.
  
  
  
• Spiral rings can be made from a variety of materials including carbon steel, stainless steel and beryllium copper.
  
  
• Rings can be produced economically in low quantities since tooling requirements are minimal.
  
  
• The manufacturing process results in very little material waste, reducing overall costs.
  
  
• Rings are coiled and not stamped, eliminating stamping burs which can cause damage in certain applications.
  
  
• Rings can be easily applied or removed in the field without special tooling.

Multi-turn, spiral-wound retaining rings consist of two or more turns of in-house rolled flat wire material with rounded edges. The material is coiled on edge to provide a gapless ring with 360 degree of retention. Spiral rings offer space savings in a radial direction since there are no assembly lugs as with tapered rings. (Note: selection of a retaining ring-tapered, constant section or spiral depends upon the specific parameters of an application). 

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