Image shown is representative and may differ from the actual product in size, proportions, and color shade
8.620 in
(218.95 mm)
12.120 in
(307.85 mm)
1/2"
SIL SI80OR51 Ring Gasket, Size: 300#-8"-RN-1/2"
Material: SIL SI80OR51 Ring Gasket
Size: 300#-8"-RN-1/2" Ring Gasket
Part Number: SI80OR51-300#-8"-RN-1/2"
SI80OR51
Silicone (VMQ)
80
Shore A
High Temperature Material
Color: Orange
Detailed Description
SI80OR51-300#-8"-RN-1/2" is a Orange, 80 Shore A, Silicone (VMQ) Ring Gasket. It is a 80 durometer Silicone (VMQ). [SI80OR51 is manufactured with the following features & specifications: High Temperature Material. SI80OR51-300#-8"-RN-1/2" is size 300#-8"-RN-1/2" Ring Gasket also referred to as 8 (Pipe Size) x 218.95mm (ID) x 307.85mm (OD) x 1/2" (Thickness). SI80OR51-300#-8"-RN-1/2" is a size 8, 300#-RN ASME Ring Gasket. Material: 80 Durometer SIL SI80OR51 Ring Gasket Size: 300#-8"-RN-1/2", 8 Pipe Size X 218.95mm ID X 307.85mm OD X 1/2" Thickness
| Technical Specification | Value |
|---|---|
| Compound Number | SI80OR51 |
| Material | Silicone (VMQ) |
| Color | Orange |
| Durometer | 80 Shore A Hardness |
| High Temperature | 315 °C / 599 °F |
| Low Temperature | -55 °C / -67 °F |
| Geometry Specifications | |
| Type | Ring Gasket |
| Size | 300#-8"-RN-1/2" |
| Pipe Size | 8 |
| ID | 218.95 mm / 8.620 in |
| OD | 307.85 mm / 12.120 in |
| Thickness | 1/2" |
SI80OR51 is an 80 shore A orange high temperature silicone compound designed for demanding sealing environments where extreme heat and environmental exposure are present. This material offers excellent resistance to thermal degradation, low compression set, and strong durability against oxygen, ozone, and UV exposure, making it a reliable choice for long-term sealing performance. With a service temperature range of -55°C to 315°C, it is well suited for high temperature O-rings and gaskets used in aerospace, industrial processing, and outdoor applications. The compound meets ASTM D2000 M5GE806 requirements, allowing it to be compared to similar high performance silicone materials from manufacturers such as Parker for equivalent applications.
Silicone rubber, commonly referred to as VMQ, is widely used in O-rings and gaskets due to its exceptional temperature range, flexibility, and environmental resistance. It performs well in both high and low temperature conditions, maintaining elasticity where many other elastomers become brittle or degrade. Silicone materials are frequently used in applications involving air, ozone, weathering, and thermal cycling, though they are generally not recommended for petroleum-based fluids. This makes silicone an ideal choice for static seals, medical components, and high temperature sealing environments where reliability and longevity are critical.
Keywords: SI80OR51, SI 80OR51, SI-80OR51, SI80 OR51, silicone O-rings, silicone gaskets, high temperature silicone, 80A silicone, orange silicone rubber, ASTM D2000 M5GE806, VMQ rubber, high temp O-ring material, Parker silicone equivalent, ozone resistant rubber, UV resistant elastomer, Datasheet, TDS, Test Report, MTR, MSDS, SDS
