Product Description:
The Parker AS568 2-Series O-Rings, covering sizes 2-001 through 2-050, are miniature sealing rings precisely molded from elastomeric materials. Each O-ring features a consistent cross-section measuring 0.070 inches (1.78 mm) in diameter. Designed to meet AS568A dimensional standards, these small-diameter rings are available in four distinct high-performance polymer types: NBR (nitrile), FKM (fluorocarbon), EPDM (ethylene propylene), and VMQ (silicone). Each polymer is selected to address specific fluid compatibility, temperature ranges, and environmental conditions.
This 2-Series collection is specifically engineered for applications requiring sealing in tight spaces under low-to-medium pressure, both in static and light dynamic scenarios. The range boasts inside diameters starting as small as 0.029 inches (0.74 mm) for size 2-001, extending up to 2.989 inches (75.92 mm) for size 2-050. This size spectrum encompasses the smallest standard AS568 O-rings, making them ideal for use in sensors, small fittings, miniature valves, analytical instruments, as well as compact pneumatic and hydraulic components.
Whether your sealing needs demand oil resistance provided by NBR, exceptional chemical and temperature tolerance from FKM, resistance to hot water, steam and weather with EPDM, or wide temperature range flexibility combined with physiological inertness in VMQ, the Parker 2-Series offers a reliable, standardized, and readily available solution. All compounds are manufactured with consistent quality and are accessible worldwide, ensuring dependable performance in various industrial applications.
Features:
The AS568A O-rings adhere to strict dimensional standards, ensuring they are fully interchangeable with standard aerospace and industrial O-ring grooves. This compliance guarantees compatibility across a wide range of applications.
There are four elastomer materials available to suit different needs: NBR, known for its general-purpose oil resistance; FKM, which performs well under high temperatures and in aggressive chemical environments; EPDM, ideal for exposure to steam, water, brake fluid, and weather conditions; and VMQ, which offers a wide temperature range along with physiological inertness.
Featuring a miniature cross-section, these O-rings have a cord diameter of 1.78 mm (± 0.08 mm). This compact size allows them to provide reliable sealing even in extremely tight radial and axial spaces.
The inside diameter of these O-rings ranges from as small as 0.74 mm (2-001) up to 75.92 mm (2-050), effectively covering the entire small-size spectrum of the AS568 2-series.
Common durometer options typically include 70 Shore A, 75 Shore A, and 90 Shore A, with the choice depending on the specific compound and size requirements.
Manufactured with high-quality molding standards, these O-rings benefit from Parker’s CBI (Controlled Batch Identification) traceability and comply with MIL-STD-413C visual acceptance criteria where applicable, ensuring reliability and consistency.
Each elastomer material exhibits a broad chemical compatibility profile, with distinct resistance characteristics. Detailed selection guidance can be found in the accompanying specification table to assist in choosing the most suitable material for your application.
Technical Parameters:
| Temperature Range (EPDM) |
-57°C To +150°C |
| Material |
NBR, FKM, EPDM, VMQ |
| Inside Diameter (inch) |
0.029 To 5.239 |
| Hardness |
70 / 90 |
| Cross-Section (inch) |
0.040 |
| Temperature Range (NBR) |
-34°C To +121°C |
| Series |
AS568 2-Series |
| Temperature Range (FKM) |
-25°C To +200°C |
| Temperature Range (VMQ) |
-55°C To +200°C (up To +232°C) |
| Tolerance (mm) |
±0.10 |
Applications:
Precision instruments and sensors require specialized components such as small ports, transducer housings, and enclosures for analytical devices. These parts play a critical role in ensuring the accuracy and reliability of sensitive measurement tools.
In the realm of miniature pneumatic and hydraulic systems, compact cylinders, small-bore actuators, valve bodies, and fitting seals are commonly utilized. These elements are designed to operate efficiently within space-constrained environments while maintaining performance.
The automotive and transportation sectors rely on a variety of small but essential parts, including fuel system components, fluid connectors, sensor seals, and brake system sub-assemblies. Specifically, EPDM materials are favored for applications involving glycol-based fluids due to their chemical resistance.
Medical and life-science devices benefit from the use of VMQ grades that comply with FDA and USP Class VI standards. These materials are ideal for fluid-path seals found in diagnostic instruments and laboratory equipment, ensuring safety and regulatory compliance.
In food and beverage processing, EPDM and VMQ compounds are available with the appropriate compliance certifications. These materials are suitable for use in potable water applications and zones where direct food contact occurs, meeting strict hygiene and safety requirements.
Semiconductor manufacturing and high-purity systems demand materials such as FKM and specially cleaned VMQ options. These are designed to handle chemically aggressive environments and high temperatures in miniature setups, ensuring performance without contamination.
General industrial sealing solutions include components for gearboxes, pumps, small flanges, and end-caps. These are typically required in compact spaces and often adhere to AS568 standards for size and compatibility.
Additionally, rotary seal auxiliary elements incorporate small 2-series O-rings which serve as energizers or secondary sealing components within certain PTFE rotary seal assemblies, enhancing overall sealing effectiveness.
Customization:
Our Pulse Valve Diaphragm, branded by Parker and model number 2-001, is a high-quality product originating from China, certified with CE standards. It is designed as an essential QBY air diaphragm pump spare part, ensuring reliable performance for your QBY diaphragm pump needs.
We offer flexible product customization services with a minimum order quantity of just 1 piece. Pricing is negotiable to meet your specific requirements. Each diaphragm is carefully packaged in a sturdy carton to guarantee safe delivery.
The delivery time ranges from 1 to 7 work days after payment, supporting efficient supply with an ability of 5000 pieces per month. Payment terms include T/T, Western Union, and Paypal for your convenience.
Our diaphragms are made from premium materials including NBR, FKM, EPDM, and VMQ, supporting a wide temperature range to fit various application needs:
- VMQ: -55°C to +200°C (up to +232°C)
- EPDM: -57°C to +150°C
- NBR: -34°C to +121°C
- FKM: -25°C to +200°C
This product is an ideal replacement part for QBY diaphragm pumps, ensuring durable and efficient operation in your industrial applications. Trust our Pulse Valve Diaphragm to maintain the high performance of your QBY diaphragm pump systems.
Support and Services:
Our Pulse Valve Diaphragm is designed for high performance and durability in demanding industrial applications. For technical support, we provide comprehensive assistance including installation guidance, troubleshooting, and maintenance tips to ensure optimal operation of your pulse valve diaphragm. Our team of experts is available to help you select the right diaphragm material and specifications tailored to your specific requirements.
We offer a range of services including product customization, replacement parts, and repair services to extend the life of your pulse valve diaphragm. Detailed product manuals and technical datasheets are available to support your engineering and maintenance teams. Regular training sessions and webinars are also provided to keep you updated on best practices and the latest advancements in pulse valve technology.
For warranty and service inquiries, please refer to the terms provided at the time of purchase. Our commitment is to deliver reliable products and exceptional customer service to maximize the efficiency and longevity of your pulse valve diaphragm systems.
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