Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.197 in
(5.00 mm)
3.031 in
(77.00 mm)
SIL Parker S1138-70 X-Ring, Size: 5X77
Material: SIL Parker S1138-70 X-Ring
Size: Metric 5X77 X-Ring
Part Number: S1138-70-XR-5X77
Color: Red
Detailed Description
S1138-70-XR-5X77 is a Red, 70 Shore A, Silicone (VMQ) X-Ring made from Parker Seal® (Parker). It is a 70 durometer Silicone (VMQ). Parker Seal® (Parker) S1138-70 is manufactured with the following features & specifications: FDA Compliant, USP Class VI. S1138-70-XR-5X77 is Metric size 5X77 X-Ring also referred to as 5mm (Cross Sectional Diameter (CS)) x 77mm (Inside Diameter (ID)). Material: 70 Durometer SIL Parker S1138-70 X-Ring Size: Metric 5X77, 5mm CS X 77mm ID (0.197" CS X 3.031" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | S1138-70 |
| Brand | Parker Seal® (Parker) |
| Material | Silicone (VMQ) |
| Color | Red |
| Durometer | 70 Shore A Hardness |
| High Temperature | 204 °C / 399 °F |
| Low Temperature | -51 °C / -60 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | X-Ring |
| Size Standard | Metric |
| Size | 5X77 |
| Cross Section (CS) | 5.00 mm / 0.197 in |
| Inside Diameter (ID) | 77.00 mm / 3.031 in |
| Other Specifications | |
FDA Compliant | |
USP Class VI | |
USP <87> | |
Parker S1138-70 is a 70 shore A rust-colored silicone (VMQ) compound formulated for FDA and USP Class VI compliant sealing applications in sanitary and regulated environments. This material is well suited for O-rings and gaskets used in food processing, medical devices, and pharmaceutical systems where cleanliness and biocompatibility are critical. It offers excellent performance in dry heat and low temperature conditions, along with good resistance to ozone, weathering, and aging, ensuring long-term durability. With a typical service temperature range of approximately -60°F to 400°F, S1138-70 provides reliable sealing in demanding high purity applications.
Silicone rubber, commonly referred to as VMQ, is widely used in O-rings and gaskets due to its broad temperature range and excellent environmental resistance. High purity silicone compounds that meet FDA and USP standards are specifically designed for use in medical, pharmaceutical, and food industries where material safety and consistency are required. These materials maintain flexibility at low temperatures while providing stable performance at elevated temperatures, making them ideal for thermal cycling applications. While highly versatile, silicone compounds are generally not recommended for ketones, strong acids, or certain fluid environments, making proper material selection essential.
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