Dynamic Rubber has made a variety of custom and off the shelf bladders for the use in composite molding. Using a bladder allows for uniform pressure to be applied for lamination, adhesive and other applications where uniform pressure is needed across a surface. These are typically custom designed parts so consult DRI for application specific […]
Non-Reinforced Inflatable Seals
Inflatable seals can be used for a variety of applications where sealing two surfaces that move in relationship to each other is required. By introducing a medium such as air or fluid, a rubber seal will begin to expand at a specified rate until a determined size of expansion is achieved. The rates and sizes of the expansion of an inflatable seal are pre-determined by one of the many shapes assizes we have readily available. For unique or custom applications, we can engineer a custom solution for your application.
Nearly all inflatable seals are custom fabricated for a specified application, and we can use many of our standard profiles to develop an inflatable seal to a custom required working parameter. By utilizing a standard profile, both time and money are saved.
Note: in some cases additional tooling may be required to create a square or rounded corner. Additional tooling may also be required to run a certain type of compound. Extrusion runs may require extra time for development.
Fabric Reinforced vs. Homogenous Inflatable Seals
In addition to homogenous (all rubber) seals, Dynamic Rubber offers fabric reinforced seals. These seals have a layer of fabric embedded into the walls of the seal. The fabric layer allows a seal to handle much greater pressures.
- Homogenous Seal Pressure – up to 25psi
- Fabric Reinforced Seal Pressure – up to 90psi
Fabric reinforcement has several benefits with an understandable trade off – cost. Fabric reinforced seals are much more difficult to produce and must be molded during a handmade process. However, the benefits to fabric reinforced seals are quite specific:
|Homogeneous Seals||Fabric Reinforced Seals|
|Greater flexibility||Longer life|
|More economical||Greater seal resilience|
|Faster to produce||Higher operating pressures|
|Improved tear resistance|
There is one notable exception about Homogenous seals and high operating pressures – a well designed homogenous or fabric reinforced seal with a fully contained retainer will allow for extremely high operating pressures beyond 65psi.
this is a new type of seal
Click Section for PDF Tapered Profile Cross-Section Height Width Expansion Standard Materials DR116 DR25 DR20 DR92 DR9 DR61 DR128 DR33 DR10 DR68 DR51 DR34 DR35 DR119 DR120 0.047 0.31 0.394 0.450 1/2 0.71 0.74 0.75 5/8 0.75 0.827 1.00 1.00 1 7/8 1 7/8 0.250 0.39 0.551 0.570 5/8 0.83 0.79 0.87 1.00 1.00 1.06 […]
Click on section for PDF File Note: Some browsers the table does not line up correctly. Please consult DRI if you are having problems Expansions are approximate and vary with pressure please consult DRI Inverted Profile Cross-Section Height Width Expansion Standard Materials DR83 DR44 DR133 DR93 DR82 DR58 DR172 DR140 DR22 DR81 DR115 DR64 DR98 […]
Click on section for PDF Expansions are approximate and vary with pressure please consult DRI. Square Profile Cross-Section Height Width Expansion Standard Materials DR11 DR185 DR188 DR43 DR14 DR78 DR57 DR167 DR179 DR165 DR70 DR42 DR63 DR97 DR134 DR94 DR100 DR40 0.20 .53 .571 0.40 1/2 0.39 0.47 1.5 1.181 1.23 1.25 1.00 1.3 0.98 […]
Click section for PDF file Expansions are approximate and vary with pressure please consult DRI Cross-Section Height Width Expansion Standard Materials DR49 DR65 DR5 DR122 DR6 DR29 DR7 DR8 DR12 DR89 DR91 DR13 DR142 DR66 DR17 DR138 DR139 DR48 (CIRCLE) 0.155 0.16 1/4 1/4 1/2 1 9/16 1/2 3/4 3/8 1/2 1/2 1/2 .14 0.438 […]
Foot Base Profiles Click on the section for a PDF drawing Cross-Section Height Width Expansion Standard Materials DR1 DR62 DR87 DR86 DR99 DR2 DR113 DR53 DR3 DR3A DR3L DR3M DR127 DR4 DR84 DR32 7/16 1/2 1/2 5/8 .79 9/16 5/8 3/4 7/8 7/8 .93 7/8 1 3/4 1 1/4 2 1/2 1 11/16 1 […]
Fabric-Reinforced Seals – Dynamic Rubber works with a variety of fabrics including Kevlar, Dacron, Nylon and Fiberglass. Fabric are chosen depending on the application. DRI will offer to match any competitors cross-sections. Please contact us for further details. Fabric seals are hand molded so consult with DRI on specific applications and material available. Other […]
Extrusion Tolerance Table Dynamic Rubber typically runs Commercial Tolerance Precision tolerance available upon request (set-up fees may apply)
Leak Test and Small Diameter Sealing Inflatable seals and bladders can be made to very small diameters given the proper molds. Dynamic Rubber has made these down to .25″. Molding the seals allows an exact fit for demanding leak testing and other applications. The above examples are inflatable seals with an open foot design. This style […]