Rolling diaphragm
For designs needing guided movement over a defined stroke; rolling profile and clearance require application review.
Custom molded silicone components
Custom Silicone Diaphragms & Precision Valve Membranes
Application-led silicone diaphragms for valve, regulator and pump assemblies. Develop the membrane geometry, material, tooling and inspection plan around your actual pressure, stroke, sealing and service conditions.
Custom geometryTooling & prototypesMaterial selectionOEM enquiries
Reference diaphragm imagery — final part design is application-specific.
Related Temco project work
Silicone valve and sealing projects
Explore published Temco portfolio examples involving silicone valve components and sealing. These are related application references, not claimed to be diaphragm case studies.
01 / SILICONE VALVE
Troka One-Way Silicone Valve
Published component example for directional-flow valve applications.
View project ↗02 / VALVE SEALING2-Inch Silicone Gasket for Agricultural Water Valves
Published sealing-component example in a water-valve assembly.
View project ↗03 / SILICONE GASKETSilicone Valve Gasket
Published custom-molded gasket example for valve-cover sealing.
View project ↗Diaphragm development
Design the membrane around how it moves and seals
A diaphragm separates chambers or transfers force while flexing under pressure. Its performance depends on more than silicone hardness: effective area, clamp geometry, wall transitions, expected displacement and media compatibility must work together.
For new OEM parts or replacement designs, our review starts with your drawings, duty cycle, sealing interface and acceptance criteria. Material and tooling choices are then evaluated against the assembly requirements.
- ✓Geometry for controlled flex and defined clamping
- ✓Silicone grade and reinforcement considered case by case
- ✓Mold design informed by manufacturability and inspection
Core specification questions
- Motion & load
- Pressure differential, stroke or deflection, cycle rate and expected life.
- Sealing interface
- Flange width, clamp design, contact surfaces and allowable leakage.
- Material environment
- Operating temperature, fluids or gases and cleaning exposure.
- Production brief
- Drawing revision, sampling plan, target quantity and critical dimensions.
Geometry options
Custom molded diaphragm configurations
Common diaphragm forms require different tooling and validation decisions. The right configuration follows your stroke, differential pressure and mounting constraints—not a universal default.
Convoluted diaphragm
Formed folds can support controlled travel when geometry, pressure and fatigue requirements are balanced.
Flat disc membrane
A compact approach for clamped assemblies, subject to appropriate stress, deflection and seal design.
Dish-shaped diaphragm
Profiled geometry for assemblies where effective area and movement must be coordinated.
Material and construction
Choose construction to match the duty cycle
Flexibility, dimensional stability and attachment strategy must be considered together. The options below are design routes to assess, not guaranteed configurations for every project.
Homogeneous silicone
A flexible construction to evaluate where the required pressure resistance and movement can be achieved without added reinforcement.
Fabric-reinforced options
Reinforcement may help manage stretching or dimensional changes. Fabric type, adhesion and flex life need validation for the application.
Assembly and bonding review
Where inserts, rigid interfaces or bonded features are required, assess adhesion, fit and process feasibility during DFM.
Material caution: VMQ and other silicone formulations do not have one universal temperature, chemical-resistance or fatigue rating. Select the grade and test plan against actual exposure; suitability must be demonstrated for each application.
From CAD to molded part
A practical diaphragm manufacturing workflow
Define critical requirements early, then use prototypes and production tooling to establish a repeatable process.
01
Application & DFM
Review drawing, flange geometry, loading, stroke, material exposure and critical inspection dimensions.
02
Tooling concept
Plan parting lines, cavity details, flow, demolding and the areas affecting membrane thickness.
03
Process assessment
Evaluate compression molding or LSR processing according to material, geometry, volume and tool suitability.
04
Samples & inspection
Agree sample acceptance criteria and production controls before volume manufacturing.
Tooling and production are linked
Thin areas, transitions, reinforcement positioning and mold venting influence part consistency. Engineering discussion should identify these risks before tool commitment.
Our silicone tooling capabilities and LSR injection molding service provide more context about related processes. Final route depends on your part.
Quality planning
Agree testing around the failure modes that matter
For dynamic sealing components, define acceptance criteria before production rather than assuming that visual inspection alone establishes performance.
- Dimensional checks: thickness distribution, flange geometry, critical molded features and drawing revision.
- Leak and pressure checks: evaluate the assembled seal under project-specific pressure and media conditions.
- Repeated-motion assessment: discuss stroke, cycle count, fatigue and hysteresis requirements with the buyer.
- Material consistency: review hardness, cure and relevant physical properties for the selected grade.
These are potential validation items. Availability, methods and pass/fail limits must be agreed for the specific project; no standard test result or lifetime is implied.
Technical quotation
What to send for a useful diaphragm RFQ
The best starting point is a drawing or sample together with assembly conditions. If your design is at concept stage, share known constraints and flag open decisions.
- 2D / 3D drawing or part sample
- Overall diameter and membrane profile
- Pressure differential and stroke
- Operating temperature and process media
- Expected cycles or service life
- Silicone grade, hardness or reinforcement
- Clamp and mating-part details
- Prototype and annual order volume
FAQ
Custom silicone diaphragm questions
Practical considerations for material, process and assembly design.
What is the difference between a flat and a rolling diaphragm?
Flat membranes suit some clamped layouts, while rolling profiles can guide motion through a defined stroke. Selection depends on pressure, displacement, available space and seal geometry.
When should fabric reinforcement be considered?
Consider reinforcement when dimensional stability or stretch control is important under pressure or repeated motion. It can also affect flexibility, so the full assembly must be evaluated.
Can you review compression molding versus LSR?
Yes. The suitable process depends on material form, membrane thickness, geometry, tooling, production quantity and required repeatability. No single process is right for every diaphragm.
What temperature and chemical compatibility can be guaranteed?
There is no universal operating range for all silicone grades. Provide the fluid or gas, cleaning agents, temperature range and exposure time so appropriate material data and validation can be reviewed.
How do I begin a custom diaphragm project?
Share a drawing or sample, pressure and stroke conditions, sealing interface, material preference and anticipated production quantity. Use the contact form or email the CAD package to our team.