Valve Seal Non-Stick Coating With Degassing Discontinuities

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Solution Overview

Problem

Fluid flow devices with plunger materials that have sticky properties can malfunction due to sticking to the valve seat, leading to overshoot phenomena and rapid gas decompression (RGD) issues, causing leakage and potential rupture.

Innovation Solution

A non-stick layer with strategically designed discontinuities, such as perforations, is applied to the sealing portion to prevent sticking and allow controlled degassing, maintaining a leak-tight seal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a continuous non-stick layer is applied to the sealing portion, then the non-stick property is improved, but the RGD effect worsens due to trapped gas unable to escape

Engineering Contradiction:

Improvenon-stick propertyVSAvoidRGD effect

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The non-stick layer is designed with a porous structure containing numerous pores distributed throughout the layer. These pores serve as escape routes for gas during rapid decompression, allowing the layer to maintain its non-stick properties while preventing the harmful RGD effect by enabling controlled gas release

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The non-stick layer has non-uniform local properties with varying pore sizes and distributions. This local quality variation allows the layer to provide non-stick properties in contact areas while creating pathways for gas escape in other areas, thus resolving the contradiction between non-stick property and RGD prevention

Inventive Principle:

Principle #3Local quality

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

Prevents sticking and minimizes RGD effects, ensuring smooth fluid flow control and reduced leakage by allowing controlled gas escape through the discontinuities.

Implementation Method 1

the sealing portion is provided with a non-stick layer for preventing sticking of the sealing portion to the valve seat or the valve member in the closed position

Methodology Applied

Scientific EffectNon-stick property: Hydrophobe

Implementation Method 2

the non-stick layer comprises one or more discontinuities of the layer for allowing degassing (or more generally speaking, 'defluidization') of the sealing portion

Methodology Applied

Scientific EffectDegassing: Permeation

Data Source

PatentUS12553531B2Fluid flow device, comprising a flow control device with a sealing portion provided with a non-stick layer having one or more discontinuities

Publication Date: 2026.02.17 BERKIN

AI summary

The invention relates to a fluid flow device (1), comprising a fluid flow channel (2) with a flow control device (3) having a valve member (4) and a valve seat (5), wherein in a closed position (I) the valve member rests against the valve seat for preventing fluid flow and wherein in an open position the valve member is positioned away from the valve seat for allowing fluid flow, wherein the valve member or the valve seat comprises a sealing portion (6) for providing a reversible and leak-tight seal between the valve member and the valve seat in the closed position, wherein the sealing portion is provided with a non-stick layer (7) for preventing sticking of the sealing portion to the valve seat or the valve member in the closed position, wherein the non-stick layer comprises one or more discontinuities (8, 8a).