Flat Seat Drainage Assembly for Enamelled Reactors
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Solution Overview
Problem
Existing drain assemblies for enamelled chemical reactors suffer from cross-contamination due to imperfect fits between the seat and drain pipe, making cleaning and disinfection difficult, and leading to product retention that can crystallize and cause enamel deterioration.
Innovation Solution
A drain assembly with a flat seat and valve head design that eliminates retention zones by using smooth surfaces and a full-flow configuration, allowing easy mounting on various reactor types, including new and existing enamelled reactors, using a chemically resistant PTFE material and a conical recess for sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional tapered seat is used in the drain assembly, then the valve head can be retained in position, but product retention occurs in the gap between the seat and drain pipe causing cross-contamination
Solution Approach 1:
The invention removes the retention zone entirely by designing a flat seat that eliminates the gap between the seat and drain pipe. The flat configuration ensures product flows completely through the drain orifice without being trapped in interstices, thereby extracting the source of cross-contamination while maintaining sealing through the flat surface design.
2Device complexity
If a tapered seat with retention zone is used, then the assembly structure is simple, but cleaning and disinfection become difficult due to inaccessible hidden volumes
Solution Approach 1:
The invention converts the potential harm of a simple flat structure into a benefit by ensuring that the flat seat design eliminates hidden volumes where product could be trapped. The simplicity of the flat configuration directly enables complete cleaning accessibility, as there are no interstices or retention zones for cleaning agents to miss.
3Reliability
If the valve head rests on a conventional seat, then the valve can be held in closed position, but product can crystallize in the retention zone causing enamel deterioration
Solution Approach 1:
The invention extracts the retention zone from the design by implementing a flat seat configuration. This eliminates the space where product could crystallize and come into contact with the enamel coating, thereby preventing enamel deterioration while maintaining reliable valve closure through the flat seat design.
4Ease of manufacture
If a classic tapered profile seat is used, then manufacturing is conventional, but the seat creates retention areas that trap product
Solution Approach 1:
The invention inverts the conventional tapered profile approach by using a flat seat configuration. Instead of tapering the seat to retain the valve head, the flat design achieves valve head retention through alternative means while eliminating product retention areas, thereby preventing cross-contamination without compromising manufacturability.
Data Source
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AI summary
The invention relates to a drainage assembly of the type having an upward opening for the draining opening of a new or existing chemical reactor, particularly of the enamelled type, characterised in that the outer outlet opening (6) for the drainage is provided in the lower portion thereof with a removable seat part in the form of a planar annular seal (11) having an upper portion with at least one recess (21) used as a seat for the under-face of the head (10) of the valve and as a full flow ramp. The invention is particularly intended for the manufacturers and users of chemical reactors, in particular of the enamelled type.