Product Description:
Parker 3-series O-rings are precision-engineered elastomeric seals crafted according to the AS568A dimensional standards. They are specifically designed for use with internal straight thread fluid connection bosses and tube fittings, adhering to specifications such as MS33656, MS357, and SAE straight thread O-ring boss standards.
This product range includes dash numbers from 3-901 to 3-932. The inside diameters vary from 4.70 mm (0.185 inches) up to 59.36 mm (2.337 inches), and the cross-sectional thicknesses (cord widths) range between 1.42 mm (0.056 inches) and 3.00 mm (0.118 inches).
To accommodate a wide variety of fluid compatibility and temperature conditions, these O-rings are offered in four main elastomer families. NBR (Nitrile) is suited for general-purpose petroleum and hydraulic applications. FKM (Fluoroelastomer) is ideal for aggressive chemical exposure and elevated temperature environments. EPDM (Ethylene Propylene) is designed for use with water, steam, and polar solvents. Lastly, VMQ (Silicone) provides excellent performance over extreme temperature ranges and is suitable for high-purity needs.
Features:
The straight thread boss is specifically designed to fit SAE straight thread O-ring ports. This precise sizing guarantees a leak-tight seal by ensuring a perfect fit against the chamfered port face, enhancing system reliability.
Compliance with AS568A dimensional standards is achieved through molding to standard dash-number tolerances. This allows for seamless drop-in interchangeability, simplifying maintenance and replacement procedures without requiring modifications.
NBR (Nitrile) materials offer excellent general-purpose performance, exhibiting strong resistance to petroleum-based hydraulic fluids, oils, and fuels. They typically operate effectively within a temperature range from approximately -34°C to +100°C (-30°F to +212°F).
FKM (Fluoroelastomer) seals provide superior chemical resistance, making them ideal for exposure to aggressive chemicals, acids, and high-temperature fluids. Their service temperature range usually spans from about -25°C to +200°C (-13°F to +392°F).
EPDM (Ethylene Propylene) materials are preferred for applications involving hot water, steam, and polar solvents such as ketones and alcohols. They generally function well within a temperature range of -50°C to +150°C (-58°F to +302°F).
VMQ (Silicone) offers extreme temperature flexibility with a wide service window. These seals operate effectively between approximately -55°C and +200°C (-67°F to +392°F), making them suitable for high-purity and extreme temperature environments.
Additionally, the precision-molded geometry of these seals ensures uniform compression set resistance. This design feature contributes to reliable sealing integrity, particularly in high-pressure hydraulic systems, enhancing overall performance and durability.
Technical Parameters:
| Material |
NBR, FKM, EPDM, VWQ |
| Cross-Section (mm) |
1.42 To 3 |
| Representative Parker Compound |
N0674-70 / N0552-90, V0747-75 / V0894-90, E3609-70, S0604-70 |
| Cross-Section (Inch) |
0.056 To 0.118 |
| Inside Diameter (mm) |
4.7 To 59.36 |
| Hardness |
70 / 90 |
| Media (EPDM) |
Hot Water, Steam, Brake Fluids, Polar Solvents |
| Inside Diameter (Inch) |
0.185 To 2.337 |
Applications:
Hydraulic Systems and Manifolds
These systems focus on sealing SAE straight thread ports commonly found on hydraulic pumps, motors, and valve bodies. Proper sealing ensures efficient hydraulic operation and prevents fluid leakage in critical components.
Tube Fittings and Connectors
Tube fittings and connectors are essential for both adjustable and fixed fluid line fittings. They provide secure connections that maintain system integrity under various pressure conditions.
Automotive and Mobile Hydraulics
This category includes transmission lines, power steering systems, and braking system ports. Each application demands reliable sealing solutions to ensure safety and optimal vehicle performance.
Industrial Fluid Power
Industrial applications cover cylinder ports, gearboxes, and hydraulic power units. These components require durable seals to handle heavy-duty operations in manufacturing and machinery.
Aerospace and Marine
Fluid connection bosses in aerospace and marine environments must comply with MS and SAE standards. These stringent requirements guarantee system reliability and safety under extreme conditions.
Support and Services:
Our Pulse Valve Diaphragm is designed to ensure optimal performance and durability in various industrial applications. For technical support, please refer to the product manual for installation guidelines, maintenance procedures, and troubleshooting tips. The diaphragm is made from high-quality materials that resist wear and chemical exposure, ensuring a long service life.
If you encounter any issues with your Pulse Valve Diaphragm, verify that it is installed correctly and that the operating conditions match the specifications. Regular inspection and cleaning can prevent common problems such as leaks or reduced responsiveness.
We offer comprehensive services including replacement parts, repair, and technical consultation to help you maintain the efficiency of your pulse valve system. Our team of experts is committed to providing prompt and professional support to minimize downtime and extend the life of your equipment.
For detailed technical documentation, installation videos, and FAQs, please visit our official website or product support portal. We recommend using only genuine replacement diaphragms to ensure compatibility and maintain warranty coverage.
Packing and Shipping:
Each Pulse Valve Diaphragm is carefully packaged to ensure maximum protection during transit. The diaphragm is first placed in a sealed plastic bag to prevent contamination and moisture exposure. It is then cushioned with foam or bubble wrap and placed inside a sturdy cardboard box designed to withstand impacts and rough handling.
For bulk orders, multiple units are securely packed in larger cartons with adequate padding between each item to avoid damage. All packages are clearly labeled with product information, handling instructions, and shipping details.
We ship our Pulse Valve Diaphragms via reliable carriers to ensure timely and safe delivery. Tracking information is provided to customers so they can monitor their shipment status until it arrives.
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