High-Pressure Priming Valve Sealing for High-Purity Fluid Drainage
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Solution Overview
Problem
High-pressure priming valves, particularly needle-type valves, face challenges in preventing biological growth and fluid contamination due to their design, which is not suitable for high-purity applications like pharmaceuticals, and are complex and costly to maintain.
Innovation Solution
A high-pressure priming valve with angled ports, a needle, a stack of washers, and a sealing insert positioned at the bottom of the washer stack to prevent fluid contact, facilitating air escape during priming and maintaining alignment under high pressures, while preventing biological growth and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a needle-type valve is used for high-pressure priming, then leak prevention is improved, but biological growth and fluid contamination risk increase due to fluid trapping between washers
Solution Approach 1:
The valve body is segmented into distinct zones: a fluid flow path and a washer stack chamber separated by a sealing surface. This segmentation prevents fluid from accessing the washer stack, eliminating the trapped fluid problem while maintaining the needle valve's leak prevention capability through the needle-sealing mechanism.
Solution Approach 2:
A sealing surface acts as an intermediary barrier between the fluid path and the washer stack. This sealing surface blocks fluid from penetrating into the washer stack chamber, thereby preventing biological growth while allowing the washers to continue providing alignment and sealing support for the needle.
2Ease of operation
If a diaphragm valve is used for high-pressure priming, then ease of installation is improved, but device complexity and maintenance cost increase
Solution Approach 1:
The patent employs a simple, robust needle valve design with replaceable washers that can be easily serviced. Instead of using a complex diaphragm assembly, the solution uses basic mechanical components (needle, washers, sealing surface) that are simpler to install, maintain, and replace, reducing overall device complexity while maintaining functionality.
3Manufacturing precision
If a needle valve with washer stack is used, then alignment under high pressure is improved, but design complexity increases compared to simpler valve designs
Solution Approach 1:
The washers serve multiple functions: they maintain needle alignment under high pressure, provide a sealing mechanism, and act as a mechanical stop. By making the washers multi-functional, the design achieves precise alignment without adding excessive complexity or requiring additional specialized components.
Solution Approach 2:
The sealing surface is specifically designed with precise geometry and finish only where needed - at the interface with the needle. This localized precision maintains alignment under high pressure without requiring the entire valve assembly to be complex or overly精密, reducing overall device complexity while maintaining critical precision where required.
Data Source
AI summary
A new and innovative high-pressure priming valve is provided for use in high-pressure fluid systems that require a high level of fluid purity. The priming valve includes at least three ports, some of which are angled. The priming valve also includes a needle that variably blocks and unblocks a pathway to one of the ports between normal operation and a priming operation, respectively. The priming valve includes a sealing insert positioned below a stack of washers that maintain the needle's alignment in response to high fluid pressures exerted on the needle. The sealing insert helps prevent fluid from contacting the stack of washers, which helps prevent biological growth within the valve. The angled ports help facilitate priming valve drainage to further help prevent biological growth. By helping prevent biological growth, the sealing insert helps prevent fluid contamination and enables the priming valve to be utilized for high-purity fluid applications.