Product Description:
Parker 300-series O-rings are precision-molded elastomeric seals manufactured to AS568A dimensional standards. This range covers dash numbers 2-309 through 2-395, all featuring a uniform 5.33 mm (0.210") cross-section. Inside diameters span from 10.46 mm (2-309) up to 658.88 mm (2-395), covering a broad spectrum of gland sizes from compact hydraulic manifolds to large industrial flanges and pressure vessels.
The series is available in four compound families to meet different pressure, temperature, and fluid requirements: Standard NBR (70 Shore A) for general-purpose petroleum and hydraulic service; Standard FKM (75 Shore A) for aggressive chemicals and elevated temperatures; 90-Durometer NBR for high-pressure static applications requiring superior extrusion resistance; and 90-Durometer FKM for combining chemical resistance with high-hardness performance in demanding sealing environments.
Features:
AS568A 300-Series Dimensional Compliance – Molded to standard dash-number tolerances for drop-in interchangeability across the 2-309 to 2-395 range.
Uniform 5.33 mm Cross-Section – The entire 2-309 to 2-395 series shares a consistent 5.33 ± 0.13 mm cord, simplifying gland design and spare-parts planning for large-diameter sealing.
Standard NBR (70 Shore A) – Excellent resistance to petroleum oils, fuels, and hydraulic fluids; typical temperature range approximately -34°C to +100°C (-30°F to +212°F), with shorter life at +121°C.
Standard FKM (75 Shore A) – High resistance to aggressive chemicals, acids, and fuels; standard service range approximately -26°C to +204°C (-15°F to +400°F).
90-Durometer NBR (N0552-90 / N1490-90) – Higher hardness provides superior extrusion resistance and pressure capability in static sealing; temperature range approximately -34°C to +121°C (-30°F to +250°F).
90-Durometer FKM (V1412-90 / V0894-90) – Combines FKM's broad chemical resistance with high hardness for demanding high-pressure static seals; temperature range approximately -26°C to +205°C (-15°F to +400°F).
Broad Size Coverage – 87 dash numbers from 2-309 to 2-395, with IDs from 10.46 mm to 658.88 mm to suit everything from valve bodies to large-diameter pipe flanges.
Technical Parameters:
| Inside Diameter (mm) |
10.46 To 658.88 |
| Cross-Section (mm) |
5.33 |
| Hardness (Shore A) |
70 , 75 , 90 |
| Material |
NBR, FKM |
| Key Media Compatibility |
Petroleum Oils, Hydraulic Fluids, Water, Fuels, Greases |
| Typical Parker Compound |
N0674-70, V0747-75 |
Applications:
High-Pressure Hydraulic Systems – 90-durometer NBR O-rings for cylinder end-caps, valve seats, and static joints requiring high extrusion resistance.
Chemical Processing Equipment – Standard and 90-durometer FKM O-rings for reactor flanges, pump housings, and aggressive media transfer lines.
Large-Bore Industrial Flanges & Vessels – The 2-309 to 2-395 range covers the large IDs needed for pipe flanges, manways, and pressure vessel closures.
General Industrial Sealing – Standard NBR for gearboxes, actuators, and fluid-line connections where petroleum resistance is the primary requirement
Support and Services:
Our Pulse Valve Diaphragm is engineered for optimal performance and durability in demanding industrial applications. To ensure the longevity and reliability of your pulse valve diaphragm, it is important to follow proper installation and maintenance procedures.
Technical support is available to assist you with product selection, installation guidance, troubleshooting, and maintenance tips. Our team of experts can help you identify the correct diaphragm model for your specific pulse valve and operating conditions.
We recommend regular inspection of the diaphragm for signs of wear, cracking, or deformation. Replacing the diaphragm at the first sign of damage will help prevent valve malfunction and maintain system efficiency.
For maintenance, clean the diaphragm and valve components with a soft cloth and avoid using harsh chemicals that could degrade the material. Ensure that the diaphragm is properly seated during installation to avoid leaks and ensure optimal sealing performance.
If you experience any issues or require technical advice, please consult the product manual or reach out to our technical support team. We are committed to providing prompt and effective solutions to keep your pulse valve systems operating smoothly.
Additionally, we offer repair and replacement services for pulse valve diaphragms to minimize downtime and maintain operational continuity. Our service centers utilize genuine parts and adhere to strict quality standards.
Packing and Shipping:
Product Packaging and Shipping for Pulse Valve Diaphragm
The Pulse Valve Diaphragm is carefully packaged to ensure it arrives in perfect condition. Each diaphragm is individually wrapped in protective material to prevent any damage during transit. The wrapped diaphragms are then placed in sturdy, labeled boxes that provide additional cushioning and support.
For bulk orders, the diaphragms are packed in larger cartons with adequate padding to avoid movement and impact. All packaging materials are chosen to be durable and moisture-resistant, ensuring the product remains safe from environmental factors.
Shipping is handled through reliable carriers with tracking options available for all orders. We offer various shipping methods to accommodate customer needs, including standard, expedited, and freight shipping for larger quantities. Each shipment includes detailed documentation and handling instructions to facilitate smooth delivery and installation.
Your message must be between 20-3,000 characters!
