Product Description:
The Parker AS568 2-Series O-Rings, ranging in sizes from 2-001 to 2-050, are miniature, precision-molded sealing rings made from elastomeric materials. Each O-ring features a consistent cross-section diameter of 0.070 inches (1.78 mm), designed to meet the AS568A dimensional standards. These small-diameter O-rings come in four different high-performance polymer types: NBR (nitrile), FKM (fluorocarbon), EPDM (ethylene propylene), and VMQ (silicone), each optimized for specific fluid compatibility, temperature ranges, and environmental conditions.
Specifically engineered for applications with limited space and low to medium pressure requirements, the 2-Series O-Rings are suitable for both static and light dynamic sealing tasks. Their inside diameters vary 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 covers the smallest standard AS568 O-Ring sizes, making them ideal for use in sensors, small fittings, miniature valves, analytical instruments, as well as compact pneumatic and hydraulic components.
Depending on the application needs, the Parker 2-Series offers tailored material choices. For excellent oil resistance, NBR is the preferred option. FKM provides outstanding chemical resistance and stability at high temperatures. EPDM is suited for applications involving hot water, steam, and weather exposure, while VMQ offers broad temperature flexibility along with physiological inertness. This ensures that the Parker 2-Series delivers a reliable, off-the-shelf sealing solution with consistent material quality and worldwide availability.
Features:
AS568A Dimensional Compliance
The AS568A O-rings meet strict dimensional standards, ensuring they are fully interchangeable with standard aerospace and industrial O-ring grooves. This makes them suitable for a wide range of applications where precision and compatibility are critical.
Variety of Elastomer Materials
These O-rings are available in four different elastomer options to accommodate different operational environments:
- NBR: Ideal for general-purpose oil resistance.
- FKM: Suitable for high temperature conditions and aggressive chemicals.
- EPDM: Best for steam, water, brake fluid, and weather resistance.
- VMQ: Offers a wide temperature range and physiological inertness.
Compact Cross-Section
Featuring a miniature cross-section with a cord diameter of 1.78 mm (± 0.08 mm), these O-rings provide effective sealing capabilities even in extremely tight radial and axial spaces.
Inside Diameter Range
The inside diameter ranges from as small as 0.74 mm (2-001 size) up to 75.92 mm (2-050 size), thereby covering the entire small-size spectrum within the AS568 2-series range.
Available Durometer Hardness
Common hardness ratings for these O-rings include 70 Shore A, 75 Shore A, and 90 Shore A. The specific durometer available depends on the compound chosen and the size of the O-ring needed.
Quality and Traceability
Manufactured with high-quality molding processes, these O-rings incorporate Parker CBI (Controlled Batch Identification) for traceability. Additionally, where applicable, they conform to MIL-STD-413C visual acceptance standards.
Chemical Compatibility
Each elastomer material offers distinct chemical resistance properties. Comprehensive selection guidance is provided in the accompanying specification table to help identify the best material for specific applications.
Technical Parameters:
| Hardness |
70 / 90 |
| Temperature Range (NBR) |
-34°C To +121°C |
| Series |
AS568 2-Series |
| Cross-Section (inch) |
0.040 |
| Temperature Range (EPDM) |
-57°C To +150°C |
| Temperature Range (FKM) |
-25°C To +200°C |
| Tolerance (mm) |
±0.10 |
| Inside Diameter (inch) |
0.029 To 5.239 |
| Temperature Range (VMQ) |
-55°C To +200°C (up To +232°C) |
| Material |
NBR, FKM, EPDM, VMQ |
This Pulse Valve Diaphragm is an essential component designed specifically for the QBY diaphragm pump, ensuring optimal performance and durability. The QBY diaphragm pump relies on high-quality materials and precise specifications, as reflected in the technical parameters above. When selecting parts for your QBY diaphragm pump, consider these parameters to maintain efficiency and reliability.
Applications:
Precision Instruments and Sensors
These components are essential in applications such as small ports, transducer housings, and enclosures for analytical devices. Their design ensures accurate performance and reliability in sensitive measurement environments.
Miniature Pneumatic and Hydraulic Systems
Compact cylinders, small-bore actuators, valve bodies, and fitting seals are integral parts of these systems. They allow for efficient operation in limited spaces while maintaining high functionality and durability.
Automotive and Transportation
In the automotive sector, components such as fuel system parts, small fluid connectors, sensor seals, and brake system sub-assemblies play a critical role. Specifically, EPDM materials are utilized for their compatibility with glycol-based fluids, ensuring safety and performance.
Medical and Life-Science Devices
VMQ grades that comply with FDA and USP Class VI standards are ideal for fluid-path seals in diagnostic and laboratory equipment. Their biocompatibility and chemical resistance make them suitable for sensitive healthcare applications.
Food and Beverage Processing
EPDM and VMQ compounds are available with the necessary compliance certifications for use in potable water systems and food-contact zones. These materials ensure hygiene and safety in food and beverage manufacturing environments.
Semiconductor and High-Purity Systems
FKM and specially cleaned VMQ options are designed for chemically aggressive or high-temperature mini-environments. These materials maintain integrity and purity in demanding semiconductor manufacturing processes.
General Industrial Sealing
Applications include sealing solutions for gearboxes, pumps, small flanges, and end-caps, especially where space constraints exist. Use of AS568 standardized components ensures consistency and interchangeability in these industrial settings.
Rotary Seal Auxiliary Elements
Small 2-series O-rings serve as energizers and auxiliary sealing elements within certain PTFE rotary seal assemblies. Their role is crucial in enhancing the sealing performance and durability of rotary systems.
Customization:
Our Pulse Valve Diaphragm, model number 2-001, is a high-quality product from the trusted Parker brand, manufactured in China. It is CE certified, ensuring compliance with international safety and quality standards. We offer product customization services tailored to your specific needs, with a minimum order quantity of just 1 piece.
The diaphragm is made from premium materials including NBR, FKM, EPDM, and VMQ, providing excellent durability and performance. It features an inside diameter range of 0.029 to 5.239 inches, and precise manufacturing tolerance of ±0.10 mm to guarantee a perfect fit for your application.
Our product is compatible with QBY air diaphragm pump spare parts and is an ideal replacement for QBY diaphragm pump models, ensuring seamless integration and reliable operation. The temperature range varies by material: EPDM diaphragms withstand -57°C to +150°C, while VMQ diaphragms perform well from -55°C up to +200°C, with some capable of enduring temperatures as high as +232°C.
We package the Pulse Valve Diaphragm securely in cartons to prevent damage during transit. Delivery time is prompt, typically within 1-7 work days after payment. Payment terms are flexible, accepting T/T, Western Union, and PayPal.
With a supply ability of 5000 pieces per month, we can meet both small and large orders. Pricing is negotiable to provide you the best value. Choose our Pulse Valve Diaphragm for reliable, customizable solutions compatible with QBY diaphragm pump systems and their spare parts.
Support and Services:
Our Pulse Valve Diaphragm product is backed by comprehensive technical support and services to ensure optimal performance and longevity. Our experienced technical team provides detailed guidance on installation, maintenance, and troubleshooting to help you achieve the best results.
We offer expert assistance in selecting the right diaphragm materials and specifications tailored to your specific application requirements. Our support includes detailed product documentation, performance data, and compatibility information to facilitate informed decision-making.
In addition to technical advice, we provide training sessions and workshops to equip your maintenance personnel with the necessary skills to handle, inspect, and replace pulse valve diaphragms efficiently and safely.
Should you encounter any operational issues, our support team is ready to assist with diagnosis and recommended solutions, minimizing downtime and maintaining system reliability.
We are committed to continuous product improvement and customer satisfaction, offering upgrade options and customized solutions to meet evolving industrial needs.
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