Product Overview
Reliable custom rubber parts for industrial applications
Quick Answer
The 035106040 NBR actuator diaphragm separates internal pressure chambers and transfers pressure-generated force to an actuator mechanism. Exact dimensions, NBR compound grade, Shore A hardness, membrane profile, mounting features, tolerances, and equipment compatibility are available upon request and require technical confirmation.
The 035106040 NBR actuator diaphragm is a flexible pressure-responsive component identified by part number 035106040. It separates internal chambers and transfers pressure-generated force to an actuator mechanism. Dimensions, NBR compound grade, Shore A hardness, membrane profile, and mounting features must match the specified assembly. Equipment compatibility and operating conditions require confirmation before ordering.
NBR Actuator Diaphragm 035106040 — Direct-Fit Replacement for Pneumatic Actuators
The NBR actuator diaphragm identified by part number 035106040 is a flexible nitrile rubber membrane engineered to match the exact diameter, thickness, and mounting configuration of a specific OEM pneumatic actuator or control valve model, allowing the part to be sourced as a direct-fit replacement during maintenance. NBR is selected for actuator diaphragms of this type because it resists swelling and degradation from oils, fuels, and hydrocarbons while maintaining the flexibility needed to withstand thousands of pressure cycles over the diaphragm’s service life. Because part number 035106040 refers to a specific manufacturer’s catalog entry, exact equipment compatibility, diameter, and attachment style should be confirmed against the original OEM documentation or a physical sample before ordering.
Key Specifications
| Parameter | Typical Range/Option |
|---|---|
| Part Number | 035106040 |
| Material | NBR (Nitrile Butadiene Rubber) |
| Available Diameters | 4.5 in, 5 in, 6 in, 7 in, 9 in |
| Reinforcement | Fabric-reinforced (nylon or polyester) or unreinforced, depending on original design |
| Diaphragm Shapes | Flat, convoluted (rolling), or dished, matched to original equipment |
| Temperature Range | Approx. -30°C to +120°C, depending on grade |
| Attachment Feature | Center hole, bonded metal stud, or plain center for stem/piston linkage |
| Manufacturing Process | Compression molding, transfer molding |
| Common Applications | Pneumatic actuators, pilot-operated control valves, pressure regulators |
What Is an NBR Actuator Diaphragm?
An actuator diaphragm sits inside the control chamber of a pneumatic actuator, flexing in response to air pressure changes delivered by a pilot valve, solenoid, or positioner, and this flexing motion drives an attached stem or piston to move the connected valve or mechanism. NBR is a common material choice for this component because of its strong resistance to oils, fuels, and hydrocarbons combined with good flexibility and compression set resistance under repeated cycling, making it well suited to actuators operating in industrial and process environments where hydrocarbon exposure is common. Part number 035106040 identifies a specific diaphragm design cataloged by its original manufacturer, and sourcing an exact or compatible aftermarket replacement typically requires matching this number against the manufacturer’s parts catalog or supplying a physical sample for dimensional verification.
Why NBR Is Commonly Used in Actuator Diaphragms
- Oil and fuel resistance — NBR resists swelling and degradation when exposed to oils, greases, and hydrocarbon fuels common in industrial actuator environments.
- Flexibility under continuous cycling — maintains elasticity through repeated stretch-and-release motion without rapid loss of mechanical properties.
- Good compression set resistance — helps the diaphragm return to its original shape after each flex cycle rather than gradually deforming.
- Cost-effectiveness — offers strong general-purpose performance at a lower cost than premium alternatives such as FKM (Viton) or specialty fluoroelastomers.
- Proven track record — NBR is one of the most widely specified elastomers across pneumatic actuator and valve diaphragm designs.
Material Limitations to Consider
| Limitation | Detail |
|---|---|
| Temperature ceiling | Not suitable for continuous service above approximately 120°C depending on grade |
| Ozone/weathering resistance | Not resistant to ozone or outdoor weathering unless specially modified |
| Chemical resistance | Limited resistance to strong acids or ester-based fluids |
For actuator applications exposed to strong acids, esters, or significant outdoor UV/ozone exposure, alternative compounds such as EPDM or FKM (Viton) should be considered instead of standard NBR.
Sourcing a Replacement for Part 035106040
- Cross-reference verification — confirm the exact equipment brand, model, and original diaphragm specification associated with part number 035106040 before ordering, since numbering systems vary between manufacturers.
- Sample-based dimensional matching — if catalog data is unavailable, providing a physical sample of the original diaphragm allows a manufacturer to measure diameter, thickness, and attachment features for an accurate replacement.
- Attachment style confirmation — verify whether the original diaphragm uses a bonded metal stud, plain center hole, or another piston/stem attachment method, since this must match exactly for correct installation.
- Reinforcement verification — confirm whether the original part is fabric-reinforced, as this affects fatigue life and should be matched in any replacement.
Manufacturing Process
NBR actuator diaphragms are produced using compression molding or transfer molding, where the rubber compound is cured under heat and pressure within a precision-machined mold cavity shaped to match the original diaphragm’s diameter, thickness, and profile. When fabric reinforcement is specified, pre-cut fabric layers are positioned within the mold cavity alongside the rubber compound before curing, with careful process control ensuring the fabric bonds fully to the rubber without air entrapment. Dimensional tolerances on diameter, thickness, and center attachment features are held tightly to ensure the finished diaphragm seats correctly and functions as a direct replacement for the original part.
Common Applications
- Pneumatic actuators for industrial process control valves.
- Pilot-operated control valves in water distribution and municipal piping systems.
- Pressure regulators and pressure-reducing valves using diaphragm-actuated control.
- General industrial equipment requiring oil and fuel resistant diaphragm components.
Custom Manufacturing Options
- Reverse-engineered diaphragms matched to part number 035106040 based on a physical sample or OEM specification data.
- Custom diameter, thickness, and profile engineered to match the original equipment exactly.
- Custom fabric reinforcement type and ply count if required by the original design.
- Custom bonded metal stud or center-hole configuration to match OEM piston/stem attachment.
- Alternative compound options (EPDM, FKM/Viton) for actuators requiring different chemical or temperature resistance than NBR provides.
- Prototype and low-volume sampling available prior to full production tooling commitment.
FAQ
Does part number 035106040 confirm equipment compatibility?
The part number is an important reference, but the equipment manufacturer, model, revision, and installation position should also be verified. Similar components may use different dimensions, profiles, NBR compounds, mounting features, or tolerances. Compatibility should be confirmed before ordering.
Is NBR suitable for every actuator application?
No. NBR suitability depends on the contact media, additives, lubricants, temperature, pressure, cycling frequency, and environmental exposure. The specific NBR compound must be matched to the actual service conditions. Compatibility testing may be required for demanding or unfamiliar media.
Can an existing 035106040 diaphragm be reproduced?
A physical sample can support structural and dimensional evaluation. Equipment details, application conditions, and available material information should also be provided. Wear, swelling, hardening, cracking, or permanent deformation may cause a used component to differ from its original specification.
Are prototype samples available?
Sample availability depends on the confirmed geometry, NBR compound, tooling requirements, and requested quantity. Initial samples can be arranged after technical review. Dimensions, material, installation fit, sealing, movement, and functional acceptance criteria should be defined before approval.
Is new tooling required?
Tooling requirements depend on whether suitable tooling already exists and whether the requested diaphragm matches the confirmed 035106040 design. New tooling may be required if the membrane profile, mounting structure, dimensions, or other critical features differ.
How are MOQ and lead time confirmed?
MOQ and lead time depend on the diaphragm dimensions, NBR compound, tooling status, inspection requirements, sample approval process, and order quantity. These details are available after the complete technical specification and estimated annual volume are reviewed.
Request a Custom Quote
Send the actuator model, part-number reference, 2D drawing, 3D model, or physical sample for review. Include dimensions, NBR requirements, contact media, temperature, pressure, stroke, cycling frequency, quantity, and estimated annual volume. Tooling, samples, MOQ, lead time, inspection, and documentation will be confirmed after technical evaluation.
