Modular Valve Seat with Interchangeable Seal Retainers
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Solution Overview
Problem
Existing valve designs require different valve body and seat configurations for varying process fluid temperatures, leading to increased manufacturing and inventory costs due to the need for multiple seal assemblies and component variations.
Innovation Solution
A modular valve seat apparatus with a seat ring having a central passage and an outer wall featuring a threaded portion, sealing portion, and flange portion, allowing for interchangeable seal assemblies across a wide temperature range (-325°F to 1100°F) without altering additional valve components, enabling the use of different types of seals without a separate retainer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different valve body and seat configurations are used for varying process fluid temperatures, then the valve can accommodate different temperature ranges, but manufacturing and inventory costs increase due to multiple seal assemblies and component variations
Solution Approach 1:
The valve seat apparatus is designed with a universal outer wall structure that can accommodate multiple types of seal assemblies through interchangeable seal retainers. The seat ring with standardized outer wall features (flange portion, sealing portion, threaded portion) serves multiple functions across different temperature ranges by simply changing the seal retainer component, eliminating the need for different valve body configurations.
Solution Approach 2:
The valve seat apparatus is divided into separable components: a standardized seat ring with outer wall, interchangeable seal retainers, and seal assemblies. This segmentation allows the main valve body to remain unchanged while only the seal retainer needs to be replaced to accommodate different temperature ranges, reducing manufacturing and inventory complexity.
2Adaptability or versatility
If multiple seal assemblies are used for different temperature ranges, then the valve can operate across varying temperatures, but manufacturing and inventory costs increase
Solution Approach 1:
A single standardized seat ring design serves multiple temperature ranges by accepting different seal retainer types. The universal outer wall structure with consistent flange, sealing, and threaded portions allows the same base component to be used across all temperature applications, reducing manufacturing complexity and inventory requirements.
Solution Approach 2:
The invention merges the functions of multiple temperature-specific valve bodies into a single universal seat ring design that accommodates all seal types through interchangeable retainers. This consolidation reduces the total number of unique components that need to be manufactured and inventoried while maintaining full temperature range coverage.
3Reliability
If a seal is disposed within an annular recess for temperatures less than 450°F, then sealing is achieved, but the seal may extrude or fail at temperatures greater than 450°F
Solution Approach 1:
The solution addresses temperature limitations by changing the material parameters of the seal retainer rather than the seal itself. Different retainer materials with appropriate temperature ratings (e.g., metal retainers for high temperature, polymer retainers for low temperature) are used with the same seal assembly, allowing the sealing system to maintain reliability across the full temperature range from -325°F to 1100°F.
Solution Approach 2:
The seal retainer acts as an intermediary component between the seat ring and the seal assembly. It mediates the temperature compatibility issue by providing a structural interface that can be selected in different material compositions to match the operating temperature requirements, protecting the seal from direct exposure to extreme temperatures that would cause extrusion or failure.
4Reliability
If a gasket is disposed between the valve seat and valve body for temperatures greater than 450°F, then sealing is achieved, but the valve seat must be fastened to the valve body requiring a different valve body configuration
Solution Approach 1:
The standardized seat ring with universal outer wall design eliminates the need for different valve body configurations. The same valve body can accommodate both gasket-based sealing (for high temperature) and seal-based sealing (for low temperature) by simply changing the seal retainer type, maintaining a single unified valve body design across all temperature applications.
Solution Approach 2:
The system transitions from static, temperature-specific valve body designs to a dynamic, interchangeable component system. The seal retainer can be quickly swapped between different material types and configurations, allowing the valve assembly to adapt to different temperature requirements without permanent modifications to the valve body structure.
Data Source
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AI summary
A valve seat apparatus for use with fluid valves is described herein. An example valve seat apparatus includes a seat ring having a central passage therethrough and an outer wall. The outer wall comprises a threaded portion (356), having a first diameter, to engage a cage (314) of a fluid valve. The outer wall also includes a sealing portion (354) to capture a seal assembly (384) between the sealing portion and a surface of a body of the fluid valve. The sealing portion has a second diameter greater than the first diameter. The outer wall of the example valve seat apparatus further includes a flange portion (352) to capture the seal assembly between the cage and the flange portion. The flange portion extends toward the surface of the body (304) and the sealing portion is to be positioned between the flange portion and the threaded portion. The flange portion has a third diameter greater than the second diameter.