From drawing to supply: how we manage the development of a custom seal
- Tecnonext
- Aug 6
- 5 min read
The development of a custom seal requires a different approach from simply selecting an already available component. When geometry, material, operating conditions or installation requirements cannot be addressed by a standard solution, it is necessary to start from the real application and build a structured technical process.
A custom-designed seal is not just a component manufactured with a customised shape. It is the result of a series of evaluations involving function, material, tolerances, operating environment, expected service life and supply requirements. Every choice affects the final sealing performance and its long-term reliability.
For this reason, the transition from drawing to supply must be managed with method. An error in the initial phase can generate later problems: material incompatibility, installation difficulties, deformation, leakage, premature wear or difficulty in maintaining consistent quality in recurring supplies.
When a custom seal is required
A custom seal becomes necessary when the application has requirements that cannot be met by an existing solution. This may involve a specific geometry, limited installation space, a combined function, severe operating conditions or the need to integrate the seal with existing components.
In many cases, the customer starts from an already defined technical drawing. In others, the starting point may be a sample, an existing housing, a problem to be solved or a performance requirement to be improved. This distinction is important: a drawing describes a geometry, but it does not always explain the entire application context in which the seal will operate.
For this reason, when developing a custom solution, the technical interpretation of the drawing must always be combined with an understanding of the application. Pressure, temperature, fluid, movement, external environment, operating cycles and installation method are all factors that can significantly influence the choice of material and production solution.
From drawing to application analysis
The first step is to verify whether the drawing or request is consistent with the function the seal must perform. A geometry may be dimensionally correct, but not optimal in terms of sealing performance, durability or ease of installation.
Technical analysis makes it possible to identify potential critical issues from the very beginning. For example, a section that is too small may not provide sufficient compression; a geometry that is too complex may require specific assessments regarding the production process; an unsuitable housing may compromise performance even when the selected material is correct.
This phase is particularly important because it helps reduce the risk of later modifications. A preventive assessment of the drawing, material and operating conditions allows the project to be structured more reliably and helps avoid solutions that may appear correct but are difficult to make reliable over time.
Material selection
Material selection is one of the key stages in the development of a custom seal. Each elastomer, technopolymer or technical material behaves differently depending on temperature, fluids, pressure, movement and operating environment.
Materials such as NBR, HNBR, FKM, EPDM, VMQ, FVMQ, PTFE, polyurethane and technopolymers can respond to very different requirements. The choice should never be based only on habit or availability, but on compatibility with the application.
An unsuitable material may work initially but lose performance over time. It may swell, harden, deform, wear or fail to maintain the necessary contact pressure. On the other hand, a material that is excessively high-performing compared with the actual application context may increase cost without providing a proportional technical benefit.
The goal is to identify the material that is most consistent with the real operating conditions, balancing performance, service life, cost and continuity of supply.
The main stages of development
In the transition from drawing to supply, Tecnonext follows a structured technical process designed to turn a specific request into a solution that is consistent with the application.
Collection of technical information
We analyse the drawing, sample or application requirements, verifying function, operating conditions and installation constraints.
Feasibility assessment
We verify geometry, material, tolerances and the most suitable production process, identifying any technical criticalities.
Material selection
We support the customer in choosing the compound or technical material most consistent with the fluid, temperature, pressure and expected service life.
Definition of the solution
We consolidate specifications, dimensions, any technical adjustments and supply requirements.
Production coordination
We manage production through qualified partners, selected according to the type of component and the required process.
Supply and continuity
We organise supply with attention to quality, repeatability and the management of any recurring requirements.
This method makes it possible to maintain a single technical and commercial point of contact, reducing complexity for the customer and improving process control.
The role of qualified production partners
Tecnonext does not simply collect a request and transfer it to production. The value of our work lies in technical coordination and in selecting the most suitable path to reach supply.
Depending on the type of seal, different processes may be involved: moulding, blanking, die-cutting, machining, extrusion, processing of technical materials or rubber-metal solutions. Each process has different characteristics, limits and advantages.
This is why it is important to work with qualified production partners that are consistent with the type of component required. A custom seal for dynamic applications does not require the same assessments as a flat die-cut gasket, a polyurethane component or a PTFE solution.
Coordination of the production network makes it possible to manage different requirements while maintaining technical control, quality and continuity of supply.
Quality, repeatability and supply management
In the B2B world, the development of a custom seal does not end with the production of the first component. True reliability is measured by the ability to maintain consistent performance over time, especially when supply becomes recurring.
Quality concerns the consistency between what is defined during the technical phase and what is supplied over time. Material, geometry, tolerances, finishes and production conditions must be managed in a controlled way, avoiding unexpected variations.
For this reason, supply management is an integral part of the process. Tecnonext operates with a structured approach and with an ISO 9001 certified quality management system, focused on process control, traceability and operational continuity.
What is useful to provide when starting a request
To correctly assess a custom seal, it is useful to collect precise technical information from the initial phase. This helps reduce time, ambiguity and possible interpretation errors.
The most useful elements are: technical drawing or sample, current material if available, seal function, contact fluid, operating temperature, pressure, type of movement, indicative quantities, any issues encountered and supply requirements.
Even when not all information is available, the initial technical discussion helps define the right questions and guide the assessment towards a more reliable solution.
Tecnonext’s approach to custom development
Tecnonext supports companies, technical departments and purchasing managers in the development of custom seals and sealing components, starting from application analysis and the definition of technical requirements.
Our role is to connect material expertise, knowledge of product families and production coordination, offering the customer a clear path from the initial request to supply. We do not assess the component as an isolated object only, but consider the system in which it will operate.
This approach makes it possible to identify more consistent solutions, reduce application risk and improve supply stability over time.
For a technical discussion, an application assessment or to schedule a visit, contact Tecnonext.
035 059 0010
Via Rudello, 11, 24067 Sarnico BG
FAQ – Custom seals
Is a technical drawing required to develop a custom seal?
Not always. It is also possible to start from a sample, an existing housing or application requirements to be analysed together.
How is the most suitable material selected?
The choice is made by evaluating fluid, temperature, pressure, movement, operating environment and expected service life.
Is a custom seal suitable for recurring supplies?
Yes. Once specifications and the solution have been defined, supply can be managed continuously, with attention to quality and repeatability.
When is it useful to request a technical assessment?
It is useful when the geometry is specific, when a seal leaks, when the component wears quickly or when the application involves complex operating conditions.
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