R.R. Rubber Enterprise

NBR O-Ring – 70 Shore A | 0.5mm Cross-Section
This NBR (Nitrile) O-ring is a precision sealing solution designed for applications requiring resistance to oils, fuels, and hydraulic fluids. With a 0.5mm cross-section, it is ideal for miniature and micro-sealing applications where space is limited and accuracy is critical.
Manufactured from high-quality nitrile rubber and rated at 70 Shore A hardness, this O-ring provides an excellent balance of flexibility and durability, ensuring reliable compression sealing and long service life.
Key Features
Material: NBR (Nitrile Rubber)
Hardness: 70 Shore A
Cross-Section: 0.5mm
Excellent resistance to oils, fuels, and grease
Good abrasion and tear resistance
Reliable sealing under pressure
Cost-effective and widely used elastomer
Typical Applications
Miniature hydraulic and pneumatic systems
Automotive fuel and oil sealing
Small valves, pumps, and sensors
Electronics and precision instruments
Industrial fluid handling equipment
This NBR O-ring offers dependable performance in compact designs where chemical resistance and sealing reliability are essential.

Neoprene Rubber O-Ring – 70 Shore A, 3 mm Cross-Section
This neoprene rubber O-ring is designed to provide reliable sealing performance in a wide range of industrial and mechanical applications. With a 70 Shore A hardness, it offers an ideal balance between flexibility and durability, ensuring a tight seal while resisting deformation under pressure.
The 3 mm cross-section makes this O-ring suitable for compact sealing grooves where consistent compression and leak prevention are critical. Made from high-quality neoprene (CR) rubber, it delivers excellent resistance to oils, weathering, ozone, and moderate chemicals, making it well-suited for both indoor and outdoor use.
Key Features:
Material: Neoprene (CR) rubber
Hardness: 70 Shore A (medium hardness)
Cross-Section: 3 mm
Excellent resistance to oils, greases, weather, ozone, and aging
Good flexibility and compression set resistance
Suitable for static and light dynamic sealing applications
Typical Applications:
Hydraulic and pneumatic systems
Pumps, valves, and compressors
Automotive and marine components
HVAC systems
General industrial sealing
This neoprene O-ring ensures dependable sealing performance, long service life, and consistent reliability in demanding environments.

EPDM D-Seal Rubber Profile
The EPDM D-Seal rubber profile is a versatile and durable sealing solution designed to provide excellent protection against air, water, dust, and noise. Its “D” shaped cross-section allows for effective compression sealing, making it ideal for doors, windows, enclosures, and industrial equipment.
Manufactured from high-quality EPDM (Ethylene Propylene Diene Monomer) rubber, this seal offers outstanding resistance to weathering, UV, ozone, moisture, and temperature extremes, ensuring long-term performance in both indoor and outdoor environments.
Key Features
Material: EPDM rubber
Profile Shape: D-Seal
Excellent weather, UV, and ozone resistance
Good flexibility and compression recovery
Resistant to water, steam, and mild chemicals
Wide operating temperature range (typically –40C to +120C)
Long service life with minimal aging
Typical Applications
Doors and window frames
Automotive and transportation sealing
Electrical enclosures and cabinets
HVAC systems
Industrial machinery and panels
This EPDM D-seal rubber profile provides a reliable, cost-effective sealing solution where durability and environmental resistance are essential.

**Hydraulic Seals** are specialized sealing devices used in hydraulic systems to prevent the leakage of fluid (typically hydraulic oil) within the system and to exclude contaminants from the outside environment. They are crucial for maintaining the efficiency, safety, and longevity of hydraulic components, primarily cylinders and pumps.
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###  Primary Function and Environment
Hydraulic seals operate in a highly demanding environment characterized by:
1.  **High Pressure:** They must withstand intense, fluctuating fluid pressures, often exceeding 5,000 PSI, without failing or being extruded out of the gland.
2.  **Dynamic Motion:** Most hydraulic seals are dynamic, meaning they must seal against rapidly reciprocating (back-and-forth) motion (e.g., a piston rod or a piston within a cylinder).
3.  **Harsh Fluids:** They must be chemically compatible with various hydraulic oils (mineral-based, synthetic, or fire-resistant types) and withstand high operating temperatures.
###  Main Categories of Hydraulic Seals
Hydraulic systems rely on several types of seals, each with a specific function within the cylinder :
#### 1. Dynamic Seals (Sealing Moving Components)
* **Rod Seals (Gland Seals):** Located in the cylinder head/gland, their primary function is to prevent hydraulic fluid from leaking out of the cylinder along the **piston rod**. They are the main external barrier.
* **Piston Seals:** Located on the piston head, their function is to prevent high-pressure fluid from bypassing the piston (internal leakage). This maintains the pressure differential necessary to extend or retract the cylinder rod.
#### 2. Protection and Guide Seals
* **Wiper Seals (Scrapers):** Located external to the rod seal, they clean the piston rod as it retracts into the cylinder, preventing dirt, moisture, and other contaminants from entering the fluid system.
* **Guide/Wear Rings:** Non-sealing rings made of strong, low-friction materials (like Acetal or PTFE) that guide the piston and rod, prevent metal-to-metal contact, and absorb lateral (side) loads.
#### 3. Static Seals
* **Static Seals (O-rings, Gaskets):** Used to seal stationary joints between components, such as the cylinder head to the barrel, where there is no relative movement.
###  Material Composition
Due to the extreme conditions, hydraulic seals are often made from high-performance elastomers and thermoplastics:
* **Polyurethane (PU):** Extremely popular for rod and piston seals due to its high tensile strength, excellent abrasion resistance, and high pressure rating.
* **Nitrile (NBR):** A common, cost-effective material for general-purpose static seals and lower-pressure dynamic seals.
* **Viton (FKM):** Used for extreme temperature or highly aggressive fluid compatibility.
* **PTFE (Polytetrafluoroethylene):** Often used in composite seals (backed by an elastomer ring) for ultra-low friction and superior chemical resistance.
In essence, **Hydraulic Seals** are precision-engineered components vital for efficiently converting fluid energy into mechanical power, ensuring reliability and preventing catastrophic failure in heavy machinery and industrial equipment.

Oil Resistant NBR Engine Gasket
Hardness: 75 Shore A | Thickness: 1.0 mm
This high-performance NBR (Nitrile Butadiene Rubber) engine gasket is designed for reliable sealing in oil, fuel, and grease-rich environments. With a hardness of 75 Shore A and a precision 1 mm thickness, it provides an excellent balance of flexibility, compression resistance, and long service life.
Key Features
Excellent Oil & Fuel Resistance – Ideal for engine oils, lubricants, diesel, and petrol exposure.
Durable NBR Rubber – Resists swelling, cracking, and degradation in harsh conditions.
75 Shore A Hardness – Provides firm sealing with controlled compression.
1 mm Thickness – Thin, precise profile for tight engine assemblies.
Temperature Resistant – Suitable for continuous use in demanding automotive environments.
Low Compression Set – Maintains sealing performance over time.
Typical Applications
Automotive and motorcycle engines
Oil pumps and gearboxes
Valve covers and crankcase seals
Fuel and lubrication systems
Industrial machinery exposed to oils and hydrocarbons
Technical Overview
Property
Specification
Material
NBR (Nitrile Rubber)
Hardness
75 Shore A
Thickness
1.0 mm
Color
Black (standard)
Oil Resistance
Excellent
Operating Temperature
Approx. -30C to +120C (short peaks up to +130C)