Based in Dongguan, Guangdong—China’s leading hub for industrial silicone sealing components—HS specializes in custom silicone rubber O-rings, engineered as compression-set resistant and temperature stable solutions for hydraulic cylinders and industrial machinery applications. Our SR-HS-05 silicone rubber O-rings are precision-molded from high-grade silicone (supplemented with EPDM/NBR/NR), with customizable sizes/colors, a 1000-piece MOQ, free samples available, full OEM/ODM support, and multi-functional durability to meet the rigorous demands of global industrial machinery manufacturers. Whether you require high-pressure silicone O-rings for hydraulic cylinders or temperature-stable seals for heavy-duty industrial equipment, our products combine compression-set resistance, material versatility, and custom precision to optimize hydraulic system performance and machinery reliability.
Core Features of Our Silicone Rubber O-Rings Our silicone rubber O-rings stand out for their compression-set resistance, temperature stability, and industrial-grade durability—key traits that make them ideal for hydraulic cylinders and multi-functional industrial machinery use.First, compression-set resistance and material performance define our silicone rubber O-rings: Premium silicone rubber exhibits less than 10% compression set (per ASTM D395 standards) after 22 hours at 150°C, ensuring long-term sealing integrity in hydraulic cylinders under constant pressure. The material also delivers broad temperature stability (-40°C to 230°C), maintaining flexibility and sealing performance in extreme industrial environments—from cold storage machinery to high-heat hydraulic systems. Supplemental EPDM/NBR/NR blends add chemical resistance (oil, coolant, solvents) for diverse industrial applications.Second, custom precision manufacturing is central to our silicone rubber O-rings. Our moulding process achieves a tolerance of ±0.02mm, enabling customized sizes (from micro to large diameters) to fit hydraulic cylinder grooves and industrial machinery sealing surfaces with a tight, leak-proof fit. We offer customer-requested colors (black for industrial use, custom shades for brand alignment) and tailored hardness levels, aligning silicone rubber O-rings with specific hydraulic system pressure requirements without compromising compression-set resistance.Third, multi-functional durable design is embedded in every silicone rubber O-ring. The robust elastomer composition resists abrasion, mechanical fatigue, and pressure cycling (up to 3000 PSI in hydraulic cylinders), while remaining flexible enough to adapt to dynamic hydraulic cylinder movement—extending service life and reducing unplanned downtime for industrial machinery.
Competitive Advantages of Our Silicone Rubber O-Rings Choosing our silicone rubber O-rings means partnering with a manufacturer with 20+ years of industrial silicone expertise, prioritizing performance, customization, and scalability for industrial machinery clients. Compression-Set Resistance & Rigorous Quality Control Every silicone rubber O-ring undergoes 100% quality inspection, including compression-set resistance testing, temperature stability validation, dimensional precision checks, and pressure-seal performance trials. Our strict quality control ensures consistent performance across all batches, meeting global industrial sealing standards and eliminating leak risks in hydraulic cylinders and industrial machinery. Customization Flexibility & Scalable Production We offer a 1000-piece MOQ for silicone rubber O-rings, catering to small industrial equipment workshops, while our 10,000-square-meter production facility and automated moulding lines enable bulk orders (100,000+ units) for major industrial OEMs. Full OEM/ODM support includes custom sizes (per hydraulic cylinder CAD drawings), material blends (silicone for temperature stability, NBR for oil resistance), colors, and logo branding—with free samples to validate fit and compression-set performance before bulk production. Cost-Effective Factory-Direct Pricing As a factory-direct manufacturer, we eliminate middlemen to offer competitive pricing on compression-set resistant silicone rubber O-rings without compromising temperature stability or durability. Our efficient moulding processes and bulk material sourcing reduce per-unit costs by 15% compared to industry averages, while streamlined production ensures on-time delivery for hydraulic cylinder and industrial machinery production schedules. Technical Expertise & Industrial Support Our team of silicone engineering specialists with hydraulic system experience provides 24/7 support—from material selection guidance (e.g., silicone for high-temperature hydraulics, EPDM for outdoor machinery) to mould design optimization for compression-set resistance. We leverage deep knowledge of industrial hydraulic systems to solve complex sealing challenges, ensuring optimal performance of silicone rubber O-rings in high-pressure, high-cycle applications.
Applications of Our Silicone Rubber O-Rings Our versatile silicone rubber O-rings serve critical sealing roles across industrial machinery, thanks to their compression-set resistance and temperature stability:
Hydraulic Cylinders: Custom silicone rubber O-rings seal piston and rod glands in hydraulic cylinders—compression-set resistance prevents leaks under constant pressure, temperature stability adapts to hydraulic fluid heat, and durability withstands millions of extension/retraction cycles. Industrial Hydraulic Pumps: Silicone rubber O-rings seal pump housings and valve ports—temperature stability resists heat from hydraulic fluid friction, while chemical resistance (NBR blends) protects against oil degradation, optimizing pump efficiency. Heavy-Duty Machinery Valves: Silicone rubber O-rings seal control valves in construction/agricultural machinery—compression-set resistance maintains sealing integrity in dusty, high-vibration environments, reducing valve malfunctions. Industrial Cooling Systems: EPDM-blended silicone rubber O-rings seal heat exchanger ports—temperature stability withstands hot/cold fluid cycles, while compression-set resistance prevents coolant leaks in factory cooling systems. Fluid Power Systems: Multi-functional silicone rubber O-rings seal accumulators and hydraulic manifolds—pressure resistance (up to 3000 PSI) and compression-set resistance ensure reliable fluid power transmission in industrial automation equipment.
At our Dongguan manufacturing facility, we leverage advanced moulding technology and a skilled workforce (100+ professionals) to produce silicone rubber O-rings that exceed industrial sealing standards. Our commitment to sustainability is reflected in eco-friendly production practices (recyclable silicone scrap, low-energy moulding) without compromising performance. We back all silicone rubber O-rings with a 3-year warranty against manufacturing defects, and offer lifetime technical support for custom hydraulic cylinder seal designs. Whether you need compression-set resistant O-rings for hydraulic cylinders or temperature-stable seals for industrial machinery, we deliver silicone rubber O-rings that combine reliability, performance, and value—engineered for industry, built to seal.
Product Description
Company Profile
Founded in 2003, Dongguan Huangshi Rubber & Plastic Tech Co., Ltd. is one of the famous silicone and plastic products manufacturers. Our factory is located in Chang'an Town, Dongguan City, enjoying good location and convenient transportation access. Being specialized in silicon mold making,plastic mold making and silicon and plastic products manufacturing, we always try our best to provide you with best-quality products. With a workshop of 6,000 square meters and a serious QC department, we are professional in making all kinds of silicone and plastic cases for cells phones, MP3, MP4 and MP5 players, silicone keyboards, silicone series parts of electronic goods, silicone kitchen accessories and silicone toys. We are sure to make better quality and better price silicone rubber and plastic products for you. Our main foreign trade markets include Southeast Asia, Europe and America. We also provide ODM/OEM products for many national famous companies. In order to satisfy different requirements from our clients, we import raw materials and machines to make our goods reach the standards of RoHS, ISO, SGS and EN71. "Do a good job at first time; do a better job every time" is our tenet. Please don't hesitate to contact us if you have any problem. We must be the one which you can trust in. We look forward to your requirements. Choose us,and we can do better for you!