Multi-component Metal Seat for Floating Ball Valves
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Solution Overview
Problem
The existing ball valve industry faces challenges with high costs and long lead times due to the need for extensive modifications and custom-made components for metal-seated floating ball valves, particularly in achieving compatibility with extreme temperatures and maintaining reliable sealing without custom fitting and lapping processes.
Innovation Solution
A multiple component metal seat design for floating ball valves, comprising a support ring and a seal element, which are juxtaposed and serve separate functions, allowing for a 'drop-in' retrofit without modifying the existing valve body, and utilizing off-the-shelf parts to reduce costs and lead times while maintaining sealing integrity across various temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If custom-made and matched components are used for metal seat installation, then sealing performance and temperature compatibility are improved, but manufacturing cost and lead time increase significantly
Solution Approach 1:
The metal seat is divided into two separate components: a support ring that provides structural strength and load-bearing capability, and a seal element that provides sealing performance. This segmentation allows each component to be optimized independently and manufactured using standard processes, eliminating the need for custom-made matched components while maintaining reliable sealing.
Solution Approach 2:
The invention uses a composite seat structure combining metal support ring and elastomeric seal element. This composite approach leverages the advantages of both materials: the metal provides high-temperature resistance and structural integrity, while the elastomeric material provides excellent sealing properties. The composite design achieves both reliability and ease of manufacture.
2Reliability
If custom fitting and lapping processes are performed, then sealing integrity is improved, but manufacturing time and complexity increase
Solution Approach 1:
By separating the support function (metal ring) from the sealing function (elastomeric element), the invention eliminates the need for precision lapping and custom fitting. The elastomeric seal element naturally conforms to the ball surface through elastic deformation, providing sealing integrity without time-consuming manual fitting processes.
Solution Approach 2:
The invention changes the material parameter from rigid metal-to-metal contact to elastomeric material with elastic properties. This parameter change allows the seal element to adapt to surface variations through elastic deformation, eliminating the need for precision lapping while maintaining sealing integrity.
3Ease of manufacture
If single-piece polymer seats are used, then ease of installation is improved, but temperature range and load-bearing capability are limited
Solution Approach 1:
The invention replaces the single-piece polymer seat with a composite structure of metal support ring and elastomeric seal element. The metal ring provides high-temperature resistance and structural strength, while the elastomeric element maintains the ease of installation and sealing properties of polymer seats. This composite approach extends the operating temperature range while preserving ease of installation.
Solution Approach 2:
By segmenting the seat into metal and elastomeric components, the invention allows the elastomeric seal element to be designed for easy installation similar to polymer seats, while the metal support ring provides the necessary temperature and load-bearing capabilities that polymer alone cannot achieve.
4Temperature
If metal seat technology is implemented with separate components, then temperature resistance is improved, but device complexity increases
Solution Approach 1:
The seat is segmented into two functional components: metal support ring for temperature resistance and structural support, and elastomeric seal element for sealing. This segmentation achieves temperature resistance without excessive complexity by assigning specific functions to each component.
Solution Approach 2:
The metal support ring serves multiple functions: providing structural support, withstanding high temperatures, and supporting the elastomeric seal element. This multi-functionality reduces overall device complexity by consolidating multiple roles into a single component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a cost-effective and time-efficient manufacturing process for metal-seated ball valves that maintain industry-standard performance, including sealing and load-bearing capabilities, while reducing torque requirements and permitted leakage, and allowing for two-way flow operation without the need for custom lapping or expensive hand-fitting processes.
Implementation Method 1
The seal element has greater elasticity than the support ring
Data Source
AI summary
A floating ball valve has a metal multiple component seat installed in the seat pocket. The multiple component seat further includes a support ring and at least one seal element. The support ring and the seal element are juxtaposed and both are adjacent to the ball when the floating ball valve is in a closed position. The support ring is in a overlapping complimentary position with respect to the seal element, the seal element having greater elasticity than the support ring and the support ring having a greater load bearing strength than the seal element.