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Silicone O-Ring (MQ, VMQ, PVMQ) Material Description

Physically, silicone o-rings are based on silicon, an element derived from quartz. To create this class of synthetic elastomers, pendant organic groups such as methyl, phenyl, and vinyl are attached to silicon atoms. Different additions of side chains can achieve significant variations in properties. Silicone o-rings have excellent heat, ozone, and corona resistance and have good dielectric stability and resistance to many oils, chemicals, and solvents. Silicone o-rings maintain the best flexible properties at low temperatures but have low tensile strength and low wear and tear resistance.

Silicone o-rings may also come in a metal detectable variation, while retaining the same qualities as the general silicone o-ring compound. Global O-Ring and Seal supplies silicone o-rings that are compliant with FDA standards, and are suitable for use in food and beverage production lines, as well as medical and pharmaceutical manufacturing. Both silicone and metal detectable silicone o-rings meet FDA compliance.

Cure System: Peroxide-Cured

Standard silicone o-ring compounds are usually peroxide-cured. Platinum-cured compounds offer better flexible properties and very low volatile matter. Platinum-cured silicone o-rings are usually applied in medical systems or other applications requiring low volatile matter. However, they need to be produced in a clean room and require a higher cost of platinum catalyzed, making them more expensive than peroxide-cured ones.

Silicone O-Ring Compounds

化合物	硬度计	颜色	温度范围（F）	Shop	描述
S50-B601	50	Red	-67 to +437		FDA-Grade
S60-C601	60	Red	-67 to +392		FDA-Grade
S70-A601	70	Red	-67 to +437		FDA-Grade
S70-B001	70	Clear	-76 to +437		USP Class VI Certified, Platinum Cured
S70-B401	70	Blue	-67 to +392		USP Class VI Certified, ISO 10993-5 Compliant
S70-B602	70	Red	-67 to +437		UL 157
S75-F601	75	Red	-76 to +437		Metal/X-ray detectable, FDA-Grade
Z90-I601	85-90	Red	-76 to +428		Teflon-Encapsulated, FDA-Grade, high/low temp resistance
Z90-I602	85-90	Red	-76 to +428		Teflon-Encapsulated, FDA-Grade, high/low temp resistance