Product Description:
Parker AS568 2-Series O-Rings, covering sizes 2-001 through 2-050, are miniature sealing rings crafted with precision molding technology. These elastomeric rings feature a consistent cross-section thickness of 0.070 inches (1.78 mm), ensuring reliable sealing performance. Designed in accordance with AS568A dimensional standards, these small-diameter O-rings come in four distinct high-performance polymer materials: NBR (nitrile), FKM (fluorocarbon), EPDM (ethylene propylene), and VMQ (silicone). Each material is specifically selected to meet various fluid compatibility, temperature tolerance, and environmental conditions.
The 2-Series O-Rings are specially engineered for applications where space is limited and sealing is required under low to medium pressure conditions. They excel in both static and lightly dynamic sealing roles. Their inside diameters range from as small as 0.029 inches (0.74 mm) for the 2-001 size, up to 2.989 inches (75.92 mm) for the 2-050 size. This size range includes the smallest standard AS568 O-Rings, making the 2-Series ideal for use in sensors, small fittings, miniature valves, analytical instruments, and compact pneumatic or hydraulic systems.
Depending on the application needs, the Parker 2-Series offers O-Rings optimized for various operating environments: NBR for excellent oil resistance; FKM for superior chemical and temperature stability; EPDM for resistance against hot water, steam, and weather exposure; and VMQ for a wide temperature range combined with physiological inertness. This range provides a ready-to-use, globally available sealing solution with consistent material quality, making the Parker 2-Series a dependable choice across multiple industries.
Features:
AS568A Dimensional Compliance
The AS568A O-rings conform to dimensional standards, making them fully interchangeable with standard aerospace and industrial O-ring grooves. This ensures seamless compatibility in various applications requiring precision sealing solutions.
Elastomer Material Options
There are four elastomer types available to suit different environmental and chemical exposures:
- NBR: General-purpose elastomer offering excellent oil resistance.
- FKM: Resistant to high temperatures and aggressive chemicals.
- EPDM: Ideal for use with steam, water, brake fluids, and excellent weather resistance.
- VMQ: Provides a wide operating temperature range and is physiologically inert.
Miniature Cross-Section
The O-rings feature a miniature cross-section with a cord diameter of 1.78 mm (± 0.08 mm). This compact size enables effective sealing in extremely tight radial and axial spaces, making them suitable for applications where space constraints are critical.
Inside Diameter Range
Covering a comprehensive range within the AS568 2-series, these O-rings are available with inside diameters starting from as small as 0.74 mm (size 2-001) up to 75.92 mm (size 2-050). This range fully supports the small-size spectrum required in precision sealing tasks.
Durometer Options
The O-rings are commonly offered in multiple durometers depending on the compound and size, typically including 70 Shore A, 75 Shore A, and 90 Shore A. This variety allows for tailored hardness levels to meet specific application demands.
High-Quality Molding and Traceability
Manufactured with high-quality molding processes, these O-rings incorporate Parker CBI (Controlled Batch Identification) for traceability. Additionally, where applicable, they comply with MIL-STD-413C visual acceptance standards to ensure product reliability.
Chemical Compatibility
Each elastomer material exhibits a unique chemical resistance profile. Comprehensive selection guidance is provided in the accompanying specification table to help choose the best material for your specific chemical environment and operational needs.
Technical Parameters:
| Temperature Range (FKM) |
-25°C To +200°C |
| Material |
NBR, FKM, EPDM, VMQ |
| Temperature Range (NBR) |
-34°C To +121°C |
| Temperature Range (VMQ) |
-55°C To +200°C (up To +232°C) |
| Inside Diameter (inch) |
0.029 To 5.239 |
| Temperature Range (EPDM) |
-57°C To +150°C |
| Cross-Section (inch) |
0.040 |
| Tolerance (mm) |
±0.10 |
| Series |
AS568 2-Series |
| Hardness |
70 / 90 |
Applications:
Precision Instruments and Sensors
This category includes small ports, transducer housings, and enclosures for analytical devices. These components are essential for ensuring accuracy and protection in sensitive measurement environments.
Miniature Pneumatic and Hydraulic Systems
Compact cylinders, small-bore actuators, valve bodies, and fitting seals are commonly used in miniature pneumatic and hydraulic setups. Their design helps optimize space while maintaining reliable performance.
Automotive and Transportation
Components such as fuel system parts, small fluid connectors, sensor seals, and brake system sub-assemblies play a vital role in automotive applications. EPDM materials are particularly favored for their compatibility with glycol-based fluids.
Medical and Life-Science Devices
Medical equipment benefits from VMQ grades that comply with FDA and USP Class VI standards. These materials are ideally suited for fluid-path seals in diagnostic instruments and laboratory devices, ensuring safety and reliability.
Food and Beverage Processing
EPDM and VMQ compounds are available with compliance certifications appropriate for potable water and food-contact areas. This ensures hygienic and safe operations in food and beverage processing environments.
Semiconductor and High-Purity Systems
For chemically aggressive or high-temperature mini-environments, FKM and specially cleaned VMQ options are utilized. These materials help maintain purity and withstand harsh conditions common in semiconductor manufacturing.
General Industrial Sealing
In industrial applications requiring compact sealing solutions, components such as gearboxes, pumps, small flanges, and end-caps benefit from AS568 standardization. This is especially important where space constraints exist.
Rotary Seal Auxiliary Elements
Small 2-series O-rings serve as energizers or auxiliary sealing elements within certain PTFE rotary seal assemblies. These components enhance the sealing performance in rotary applications.
Customization:
Introducing the Parker Pulse Valve Diaphragm, model number 2-001, a high-quality replacement part designed specifically for QBY air diaphragm pump spare parts. Manufactured in China and certified with CE, this diaphragm is an essential component for maintaining the efficiency and reliability of your QBY diaphragm pump.
Our product belongs to the AS568 2-Series and is made from premium materials including NBR, FKM, EPDM, and VMQ to ensure durability and excellent performance. The diaphragm supports a wide temperature range depending on the material: NBR (-34°C to +121°C), EPDM (-57°C to +150°C), and VMQ (-55°C to +200°C, up to +232°C), making it suitable for various operating conditions.
We offer a minimum order quantity of 1 piece with flexible pricing available upon negotiation. Each diaphragm is carefully packaged in cartons to ensure safe delivery. With a supply ability of 5000 pieces per month, we guarantee prompt shipment within 1-7 work days after payment.
Payment can be made conveniently via T/T, Western Union, or PayPal. Choose our Parker Pulse Valve Diaphragm to ensure the best fit and performance for your QBY diaphragm pump needs, keeping your equipment running smoothly and efficiently.
Support and Services:
Our Pulse Valve Diaphragm is designed to provide reliable and efficient performance in a variety of industrial applications. For technical support, please ensure that the diaphragm is installed according to the manufacturer’s specifications to avoid premature wear or failure.
If you encounter any issues with the Pulse Valve Diaphragm, verify that the operating conditions such as pressure, temperature, and chemical exposure are within the recommended limits. Regular inspection and maintenance will help extend the diaphragm's service life.
Replacement diaphragms should match the exact model and specifications of your pulse valve to guarantee compatibility and optimal functionality. Always use genuine parts to maintain the integrity of your system.
For detailed troubleshooting, installation guides, and maintenance instructions, refer to the product manual provided with your purchase. Our technical team is available to assist with any product-related inquiries to ensure your operations run smoothly.
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