Sloped Valve Seat Support for High-Pressure Deformation Resistance
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Solution Overview
Problem
Conventional fluid control valves face challenges in withstanding high compressive loads, leading to deformation of valve seats under pressure, especially in high-pressure applications and cold temperatures where standard materials like polymer O-rings may fail.
Innovation Solution
A valve seat and seat support assembly featuring a sloped surface design, where a metallic seat support with higher compressive strength is used to prevent deformation of the valve seat by providing a rigid backing, with the sloped surfaces of the seat and support mating to resist deformation during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional valve seat design is used, then the device structure is simple, but the valve seat deforms under high compressive loads
Solution Approach 1:
The invention uses a composite structure combining a polymer valve seat with a metallic seat support. The polymer seat provides sealing functionality while the metal support provides high compressive strength. This composite approach allows the valve seat assembly to withstand high compressive loads without deformation while maintaining the sealing benefits of polymer materials.
Solution Approach 2:
The valve seat is divided into two functional segments: the polymer sealing surface that contacts the control element and the metallic support structure that provides mechanical strength. This segmentation allows each material to perform its optimal function - the polymer for sealing and the metal for structural support under compression.
2Reliability
If standard polymer materials are used in cold temperatures, then the device is simple, but the materials fail under high pressure
Solution Approach 1:
The composite structure combines temperature-resistant polymer sealing material with metallic support that maintains strength in cold temperatures. The metal component prevents the assembly from failing under high pressure in cold environments while the polymer maintains sealing functionality.
Solution Approach 2:
Different materials are used in different regions of the seat assembly - the polymer provides sealing quality where contact with the control element occurs, while the metal provides structural strength quality in the support region. This local differentiation of material properties optimizes performance for both sealing and pressure resistance.
Data Source
AI summary
A high pressure fluid control device includes a valve body defining an inlet, an outlet, and a throat disposed between the inlet and the outlet. The valve body defines a longitudinal axis. A valve seat is disposed in the throat and includes a sloped surface. A seat support is disposed in the throat and is adjacent to the valve seat. The seat support includes a sloped surface adjacent to the sloped surface of the valve seat. A control element is disposed in the valve body and includes a stem and a seating surface. The control element is movable between an open position, in which the seating surface is spaced away from the valve seat, and a closed position, in which the seating surface engages the valve seat. The sloped surface of the seat support provides a rigid support to the valve seat to resist deformation of the valve seat.