ParFab Design Guide
40Pages

are typically supplied oncardboard or plasticspools, or free-coiled in lengths of up to 5000 feetdepending upon cross-section. Long Length Extrusions > TechSeal offers manystandard extruded profilesin Solid & Hollow-O, Solid& Hollow-D, U-Channel, Rectangular, Solid &Hollow Square, andHollow-Dart configurations. These profiles are typicallyused for fabrication intospliced rings or custom gaskets; they also can be supplied in bulk cord. Seepages 13 through 19 for a complete listing of standardprofiles and groove recommendations. > Please refer to page 11 for TechSealْs standard material offering of our most commonly used compounds. Please contact the TechSeal Division if you have a requirement fora material other than those listed. TechSeal offers a broadrange of materials for many different markets. Many TechSeal compounds meet or exceed specialty grade The Parker TechSeal Division JBL Operations produces awide range of standardӔ and customӔ extruded products fabricated from a variety of Sealing GradeӔ materialformulations. This brochure contains a listing of standardextruded profiles used to fabricate spliced rings, gaskets or long length bulk footage on a spool or coiled for customerfabrication standards set by the UL, ASTM, Military, FDA, USP Class VI, NSF and other agencies. . > Extruded and Spliced/Fabricated Products are madeutilizing a hot vulcanization process to provide spliced ringsand custom gaskets from either standardӔ or customӔcross-sectional profiles. TechSeals precision extruded and splicedproducts offer an ideal, cost-effective sealing solution for many applications. Theseinclude low-closure forceseals, large diameter profiles that cannot be molded, orrequirements for hollow O-rings, non- standard solid O-rings, and otherextruded profiles with aninside diameter larger than 1.500Ҕ (38.1mm). All TechSeal extruded and spliced partsare ԓHot Vulcanized, and provide the designer with atremendous amount of flexibility and can be attached/ assembled into grooves or onto flat surfaces. ParFab products contained in this brochure or any custom extruded profile can be supplied as: > Please contact the TechSeal Divisions Sales and Market-ing Department for part number assignment for all non-standard cross-sections for spliced or fabricated parts. Spliced Rings All TechSeal Spliced Rings are ғHotVulcanized and can be provided in any of TechSealԒsstandard or customer specified cross-sectional configura-tions. Minimum spliced diameter is 1.500 (38.1mm) insidediameter, however this is cross-sectional dependant. 1 > Parker Hannifin Corporation TechSeal DivisionJBL Operations

F our-Corner Spliced Picture Frame Gaskets are a goodsolution for flat panel no groove sealingӔ when PSA is addedto backing and are typically used for environmental sealing applications. To specify a Four-Corner Picture Frame Gasket,simply give us the outside dimensions or prepare a drawingwith the selected cross-section and the outside gasket dimen- sion (see Fig. 2). Please contact the factory formanufacturability if selected cross-section is less than .100.See Table 2 for outside gasket length tolerances. To order TechSeal Spliced Rings, simply choose the cross-section and inform...

TechSeal offers two types of PSA; Standard (ST) and HighTemp (HT). Product utilizing the ST Type PSA is ourstandard and will be lower cost. > Pressure-Sensitive Adhesive Widths Available Inch (mm):.090 (2.29).200 (5.08).100 (2.54).250 (6.35).125 (3.17).375 (9.52) .160 (4.06).625 (15.87)Table 3 - Standard PSA Widths Available It is very important to follow the following instructions to ensuremaximum adhesion of the PSA to the metal substrates.Failure to comply with the cleaning process could result in poor adhesion. Proper safety precautions should also befollowed to protect the operator....

Optimum Application Temperatures Hardware Captured : This attach-ment method typically does notrequire adhesive to hold the seal inplace nor a groove, while assuring capture of the seal by utilizinghardware. Temperatures below 50F (10аC) can cause poor gasketadhesion to substrate surface during assembly. Idealgasket installation temperature is 72F (22аC), or room temperature. All materials should be stored at thistemperature when not in use. If hardware gasketmaterials are stored below 50F (10аC) these parts should be brought to a warmer environment and al-lowed to come to room temperature...

The following information is intended to serve as a guide toassist in selecting the best profile candidate and establish- ing the gland needed to generate an effective seal for the application. Compressive Force Cross-Section Squeeze Compressive force or load deflection is defined as theforce required to deflect a seals cross section along eachlinear inch of the seal. Factors that can influence thischaracteristic include the physical properties of the sealmaterial, the dimensions of the cross-section, the configu-ration of the seal cross-section (profile shape, hollowversus solid, etc.),...

and splice surface contact area can have a synergistic effecton the required stretch force. Seal recovery time should beallowed into the process when high installation stretchpercentages occur.It is also suggested that an installed ID (IP) stretch percentageof 0.5% to 3% be used for all traditional gland configurations.Beyond 3%, the life of the seal may be reduced, and exces-sive strain can occur at the spliced joint. Designing in a smallamount of installation stretch can assist the assembly process,holding the seal in the proper position until the mating compo-nents are in place. This can...

deflected more easily under a given load versus a square orrectangular cross-section seal. The sealing return force is focused on the centerline of the cross-section, therebygenerating an effective seal over a relatively small area. SolidO-, D-, square and rectangular profiles can also be produced to fit almost any groove cross-section, which makes sealdesign easier, and allows for field retrofit. Figure 5 - Wandering Seal Groove Hollow Cross-Section Profiles TechSeals extrusion and splicing capabilities provide multiplesolutions for these types of applications for several reasons: Hollow...