Swing Check Valve Seat With Dampening Ring for Reverse Flow Impact
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Solution Overview
Problem
Swing check valves experience damage and leakage due to high-velocity reverse fluid flow, which causes undesirable impact on the valve seat and flapper, especially in applications with rapid flow direction reversals.
Innovation Solution
Incorporation of a dampening ring with biasing members and a seal within the groove of the swing check valve to absorb energy and minimize the force of high-velocity reverse flow, preventing damage and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a swing check valve uses a freely rotatable flapper for straightforward design and suitability for unclean process fluid, then the valve structure is simple and reliable, but high-velocity reverse flow creates undesirable impact on the valve seat causing damage and leakage
Solution Approach 1:
A dampening ring is introduced as an intermediary component between the flapper and the valve seat. This dampening ring absorbs the impact energy from high-velocity reverse flow, preventing direct transmission of harmful forces to the valve seat while maintaining the simple swing check valve structure. The dampening ring acts as a buffer that mediates the interaction between the moving flapper and the stationary seat.
Solution Approach 2:
The dampening ring is pre-installed on the valve seat to provide cushioning protection before impact occurs. This beforehand cushioning mechanism ensures that when reverse flow happens, the impact force is already mitigated by the dampening ring, preventing damage to the valve seat and reducing leakage risks before they can occur.
2Productivity
If the flapper freely rotates to allow fluid flow in primary direction, then the valve operates smoothly for normal flow, but rapid flow direction reversal drives fluid velocity to maximum value creating damage
Solution Approach 1:
The dampening ring serves as a protective intermediary that allows the flapper to maintain its freely rotating operation for efficient fluid flow while simultaneously protecting the valve components from damage during rapid flow reversals. The dampening ring absorbs the extreme velocities associated with rapid reversals without interfering with normal flow operation.
Solution Approach 2:
By pre-installing the dampening ring, the valve is prepared in advance to handle rapid flow direction reversals. This beforehand cushioning ensures that when high-velocity reverse flow occurs, the impact is already mitigated, preserving the reliability and durability of the valve components while maintaining productivity during normal operation.
3Reliability
If the flapper abuts the valve seat to prevent reverse flow, then the valve effectively blocks secondary flow direction, but the impact force causes damage to the seat or flapper
Solution Approach 1:
The dampening ring acts as an intermediary between the flapper and valve seat during the closing action. It allows the flapper to effectively abut and prevent reverse flow while the dampening ring absorbs the impact forces, preventing damage to either the seat or flapper. This maintains reverse flow prevention reliability while preserving component integrity.
Solution Approach 2:
The dampening ring provides beforehand cushioning that protects the valve components during the reverse flow prevention action. When the flapper closes to block secondary flow direction, the dampening ring is already in place to cushion the impact, ensuring effective sealing without compromising the strength or integrity of the valve components.
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 dampening ring reduces the impact force on the valve components, extending their lifespan and preventing reverse flow leaks even at low pressures.
Implementation Method 1
a dampening ring positioned at least partially within the groove and including an interface aligned with the face of the seat such that the flapper abuts the interface in the second position
Implementation Method 2
Incorporation of a dampening ring with biasing members and a seal within the groove of the swing check valve to absorb energy and minimize the force of high-velocity reverse flow
Data Source
AI summary
A swing check valve includes a valve body that defines a fluid flow path from a fluid inlet to a fluid outlet; a flapper coupled to the valve body and moveable between a first position to allow fluid flow in a primary flow direction through the fluid flow path and a second position to impede fluid flow in a secondary flow direction through the fluid flow path; a seat coupled to or integral with the valve body within the fluid flow path such that the flapper is apart from a face of the seat in the first position and abuts the face of the seat in the second position, the seat including a groove formed in the face; and a dampening ring positioned within the groove and including an interface aligned with the face of the seat such that the flapper abuts the interface in the second position.