O-Rings & Sealing Products
Nitrile Rubber O-Ring Oil Seal
• No.: NBR Oring • Standard: GB1235 /JIS B2401 • Color: Black / Customized Color • Hardness: 50-90 Shore A (Customized Available) • Media: Oil, Hydraulic Fluid, Air, Water • Temperature Range: -40°C to +120°C • MOQ: 1 PCS
Features
- Standard O-Ring sizes
- OEM customized production
- Excellent oil & fuel resistance
- Good mechanical strength
- Multiple sizes & specifications
- CE/ISO9001 Certification
Applications
Nitrile Rubber O-Ring GB 1235 JIS-B 2401 Equivalent Oil Seal
Reliable Sealing Performance for Hydraulic, Pneumatic and Industrial Applications
About This Product
Product Overview
JUNIQ Precision NBR O-Ring 70 Shore A is a high-performance nitrile rubber sealing ring designed for reliable sealing in industrial and mechanical applications.
Made from quality Nitrile Butadiene Rubber (NBR), the O-Ring offers excellent oil resistance, good wear resistance and reliable elasticity. It is available according to GB 1235 dimensions, with sizes equivalent to JIS B 2401 requirements.
Suitable for hydraulic equipment, pneumatic systems, pumps, valves, cylinders, automotive components and general industrial machinery.
Get NBR-orings Specifications · Model Selection · OEM Support · Bulk Pricing · Shipping Solutions
👤 Contact Us
📞 Phone / WhatsApp: +86 151 5226 0167
✉️ Email: info@juniqprecision.com
📍 Address: Wuxi, Jiangsu, China
key advantages
Why choose JUNIQ NBR O Ring?
Reliable sealing performance
The elastic NBR material provides effective sealing under compression and helps prevent fluid or gas leakage.Cost-effective sealing solution
NBR is one of the most commonly available and economical O-ring materials for general engineering applications.
Wide range of applications
Suitable for hydraulic and pneumatic systems, pumps, machinery, automotive equipment, pipe fittings, and HVAC applications.
Excellent oil & fuel resistance
NBR is well suited for contact with oils, greases, fuels, and many petroleum-based hydraulic fluids.
Technical Data
Technical Specifications
Feel free to contact our sales engineer for more details and price of our NBR Oring seal.
| Product Name | NBR O-Ring |
| Material | Nitrile Rubber (NBR) |
| Hardness | 70 Shore A |
| Color | Black / Customized |
| Standard | GB1235 /JIS B2401 |
| Temperature Range | -40°C to +120°C |
| Pressure Resistance | up to 20 MPa (According to Application) |
| Sealing Type | Static & Dynamic |
| OEM | Available |
Would you like to receive a detailed specifications sheet? Please contact our sales engineers.
Selection Guide
How to Select the Right NBR ORing
(1) Material Selection
Choosing the correct O-ring depends on your working conditions.
| Working Condition | Recommended Material |
|---|---|
| Hydraulic Oil / Lubricant | NBR |
| Fuel / High Temperature | FKM |
| Water / Weather Exposure | EPDM |
| Food / Medical Applications | Silicone |
| Chemical Environment | PTFE / FKM |
Material Property Comparison
| Property | NBR (N) | Silicone (S) | FKM | EPDM (E) | Neoprene (C) | PTFE (T) | PU | ACM (A) |
|---|---|---|---|---|---|---|---|---|
| Ozone Resistance | × | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ |
| Weather Resistance | △ | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ |
| Heat Resistance | 120ºC | 250ºC | 200ºC | 150ºC | 120ºC | 280ºC | 90ºC | 150ºC |
| Chemical Resistance | ○△ | ○○ | ○○ | ○○ | ○△ | ○○ | ○○ | × |
| Oil Resistance | ○○ | ○△ | ○○ | × | ○△ | ○○ | ○○ | ○○ |
| Water Tightness | ○ | ○ | ○ | ○ | ○ | ○○ | ○ | ○ |
| Cold Resistance | -40ºC | -55ºC | -20ºC | -55ºC | -55ºC | -100ºC | -60ºC | -20ºC |
| Abrasion Resistance | ○ | × | ○ | ○○ | ○ | ○○ | ○○ | ○ |
| Deformation Resistance | ○○ | ○○ | ○ | ○○ | △ | × | × | △ |
| Mechanical Properties | ○○ | × | ○○ | ○○ | △ | ○○ | ○○ | △ |
| Acid Resistance | △ | ○△ | ○○ | ○ | ○△ | ○○ | ○○ | × |
| Tensile Strength | ○○ | × | ○ | ○○ | ○ | △ | ○○ | △ |
| Electrical Properties | △ | ○ | △ | ○ | △ | ○○ | △ | △ |
| Water/Steam Resistance | ○△ | ○△ | ○△ | ○○ | △ | ○ | ○ | × |
| Flame Resistance | × | △ | ○○ | × | ○ | ○○ | ○○ | × |
| Shelf Life | 5-10Y | ~20Y | ~20Y | 5-10Y | 5-10Y | ~20Y | ~20Y | ~20Y |
Legend: ○○ Excellent ○ Good △ Fair × Poor
(2) Working Temperature
Normal industrial temperature:
NBR: -40°C ~ +120°C
FKM: -20°C ~ +200°C
EPDM: -55°C ~ +150°C
Silicone: -55°C ~ +250°C
For higher temperature requirements, please contact us for alternative materials.
(3) Hardness Selection
| Application Condition | Shore A | IRHD | Recommended Application |
|---|---|---|---|
| Low Pressure / High Sealing Requirement | 40 ±5 / 50 ±5 | - | Soft O-rings for low pressure applications requiring high sealing performance |
| General Sealing Applications | 60 ±5 | 63 ±5 | Standard static and dynamic sealing applications |
| General Industrial Sealing | 70 ±5 | 73 ±5 | Most common O-ring hardness for industrial applications |
| High Pressure Applications | 80 ±5 | 83 ±5 | High pressure hydraulic and pneumatic sealing |
| Heavy Duty / High Pressure | 90 ±5 | 92 ±5 | High pressure, extrusion resistance and demanding conditions |
(4) Application Type
Static Sealing
- • Flanges
- • Valves
- • Pipe connections
Dynamic Sealing
- • Hydraulic cylinders
- • Pneumatic cylinders
- • Moving components
It is critical to determine whether your application involves dynamic or static sealing.
Where It's Used
Product Applications
| Application Field | Typical Applications |
|---|---|
| Hydraulic Industry | Hydraulic cylinders, hydraulic pumps, hydraulic valves, hydraulic systems |
| Pneumatic Systems | Pneumatic cylinders, air control systems, pneumatic equipment |
| Pumps & Valves | Pumps, valves, fluid control equipment, sealing components |
| Industrial Machinery | CNC equipment, machine tools, automation machinery |
| Manufacturing Equipment | Production lines, assembly equipment, mechanical components |
| Agricultural Machinery | Hydraulic equipment and agricultural machines |
| Construction Machinery | Heavy equipment and hydraulic systems |
| Customized Applications | OEM sealing solutions according to drawings or samples |
True video about our pRODUCTs
Product Display
Feel free to contact us for more details and quotation!
User Guide
Installation & Maintenance Guide
Installation Instructions
Check the O-Ring
Before installation, check the O Ring for surface defects, cracks, deformation, or contamination. Ensure the size and material are suitable for the application.
Clean the Sealing Area
Clean the groove, sealing surface, and surrounding components to remove dust, oil, metal particles, and other contaminants.
Apply Lubrication
Apply a suitable lubricant compatible with rubber to reduce friction and prevent damage during installation. Avoid petroleum-based lubricants.
Install Carefully
Place the NBR O-Ring into the groove evenly. Avoid twisting, stretching excessively, or cutting the sealing ring during installation.
Check Assembly
Ensure the O-Ring is properly positioned and not pinched or displaced before system operation.
Perform Testing
After installation, conduct pressure testing or leakage inspection to confirm sealing performance.
Maintenance Recommendations
Regular Inspection
Periodically check the O-Ring for wear, aging, cracks, hardening, or deformation.
Keep Clean
Prevent dust, particles, and chemical contamination from damaging the sealing surface.
Avoid Improper Media
Do not expose O-Rings to petroleum oils, mineral oils, fuels, or hydrocarbon solvents.
Monitor Working Conditions
Ensure operating temperature, pressure, and chemical environment are within the recommended range.
Replace When Necessary
Replace the O-Ring if leakage, permanent deformation, surface damage, or loss of elasticity occurs.
Proper Storage
Store in a cool, dry place away from direct sunlight, ozone sources, heat, and chemicals.
Why choose Juniq precision?
Company Introduction
Wuxi Juniq Precision Industrial Co., Ltd. focuses on precision sealing products and industrial components.
√Rubber O Rings
√Hydraulic Seals
√Industrial Rubber Seals
√Customized Sealing Parts
(2)Quality-Oriented Production
We focus on:
√ Material control
√ Dimensional accuracy
√ Hardness inspection
√ Appearance inspection
√ Batch management
Providing stable sealing solutions for global customers.
(3)Customer-Focused Service
We support customers with:
√ Product selection assistance
√ Customized solutions
√ Export service
√ Technical communication
Logistics
Packaging & Delivery
Packaging & Shipping
Delivery & Transportation
| Shipping Method | Express / Air Freight / Sea Freight |
| Trade Terms | EXW / FOB / CIF |
| Loading Port | Shanghai Port / Other ports according to customer requirements |
| Delivery Time | According to order quantity and production schedule |
| Order Support | Sample orders, trial orders and bulk orders accepted |
| Payment Methods | T/T, L/C, PayPal, Western Union |
Payment & Order Support
Wuxi Juniq Precision Industrial Co., Ltd. supports multiple payment methods, including T/T, L/C, PayPal, and Western Union. We offer flexible trade terms such as EXW, FOB, and CIF. We support sample orders for quality evaluation, flexible MOQ for different purchasing needs, and OEM orders with customized specifications, packaging, and labeling.
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Get Your Sealing Solution Today
Need a Reliable NBR O Ring Supplier?
Send us your drawing, sample, size, or application details.
Our engineers will help you select the right material, size, and sealing solution with competitive factory pricing.
JUNIQ Precision – Your Industrial Component Supporter
Email: info@juniqprecision.com
WhatsApp: +86 151 5226 0167
Website: www.juniqprecision.com
Not sure which model fits? Tell us your requirements and we'll check it for you.
FAQ
Frequently Asked Questions
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