**Parker 3‑911 3‑912 3‑913 AS568 O‑Ring Assembly Kit, ID 21.92‑25.04MM Wire 2.95MM NBR FKM EPDM VMQ Anti‑Degradation For Off‑Road Machinery Fluid Power Assembly Service**

Product Description:

Parker 3-series O-rings are precision-engineered elastomeric seals crafted according to the AS568A dimensional standards. These O-rings are specifically designed for applications involving internal straight thread fluid connection bosses and tube fittings, adhering to specifications such as MS33656, MS357, and SAE straight thread O-ring boss requirements.

The product line includes dash numbers ranging from 3-901 to 3-932. Their inside diameters vary between 4.70 mm (0.185 inches) and 59.36 mm (2.337 inches), while the cross-section thicknesses (cord widths) span from 1.42 mm (0.056 inches) to 3.00 mm (0.118 inches).

These O-rings are offered in four main elastomer families to address a wide range of fluid compatibility and temperature demands. The NBR (Nitrile) variety is ideal for general-purpose petroleum and hydraulic uses. FKM (Fluoroelastomer) types provide resistance against aggressive chemicals and high temperature conditions. EPDM (Ethylene Propylene) O-rings are suited for water, steam, and polar solvent environments. Lastly, VMQ (Silicone) options cater to extreme temperature variations and applications requiring high purity.

Features:

The Straight Thread Boss is specifically designed to fit SAE straight thread O-ring ports, ensuring a secure, leak-proof seal against the chamfered surface of the port face. This precise sizing guarantees optimal compatibility in hydraulic applications.

Manufactured according to AS568A standards, these O-rings adhere to dimensional tolerances defined by dash-number specifications, allowing for seamless drop-in interchangeability without compromising performance.

Nitrile (NBR) O-rings offer excellent resistance to petroleum-based hydraulic fluids, oils, and fuels. Their typical operating temperature range spans from approximately -34°C to +100°C (-30°F to +212°F), making them versatile for general purpose use.

For applications requiring chemical resistance, Fluoroelastomer (FKM) O-rings are highly effective against aggressive chemicals, acids, and high-temperature fluids. They can reliably perform within a temperature range of about -25°C to +200°C (-13°F to +392°F).

Ethylene Propylene (EPDM) O-rings are ideal for water and steam service, especially in hot water, steam, and polar solvents such as ketones and alcohols. These O-rings typically operate from -50°C to +150°C (-58°F to +302°F).

Silicone (VMQ) O-rings provide exceptional flexibility over an extreme temperature window, approximately -55°C to +200°C (-67°F to +392°F). Their properties make them suitable for high-purity and extreme temperature environments.

The precision-molded geometry of these O-rings ensures uniform compression set resistance, which translates to dependable sealing integrity even in demanding high-pressure hydraulic systems.

Technical Parameters:

Applications:

Hydraulic systems and manifolds utilize sealing solutions specifically designed for SAE straight thread ports found on hydraulic pumps, motors, and valve bodies. These seals ensure reliable and leak-free operation in demanding hydraulic applications.

Tube fittings and connectors are essential components used in both adjustable and non-adjustable fluid line fittings. They provide secure and efficient connections that maintain system integrity under various pressure conditions.

In the automotive and mobile hydraulics sector, sealing and connection technologies are applied to transmission lines, power steering assemblies, and braking system ports. These applications demand high performance and safety standards to support vehicle functionality.

Industrial fluid power systems incorporate these sealing solutions for cylinder ports, gearboxes, and hydraulic power units. Proper sealing in these areas is crucial for maintaining system efficiency and preventing fluid leakage.

The aerospace and marine industries require fluid connection bosses that comply with MS and SAE standards. These stringent requirements ensure the reliability and safety of fluid connections in harsh and critical operating environments.

Support and Services:

Our Pulse Valve Diaphragm product is designed to deliver reliable performance and durability in various industrial applications. For technical support, our team of experts is available to assist you with installation guidance, troubleshooting, and maintenance tips to ensure optimal operation of your pulse valve diaphragm.

We offer comprehensive services including product inspection, replacement parts, and customized solutions tailored to meet your specific requirements. Our support extends to providing detailed documentation, technical drawings, and compatibility information to help you integrate the pulse valve diaphragm seamlessly into your system.

For any technical inquiries or service requests, please refer to the product manual or visit our support portal for FAQs and instructional resources. Our commitment is to provide prompt and efficient support to minimize downtime and maximize the lifespan of your pulse valve diaphragm.

Packing and Shipping:

Each Pulse Valve Diaphragm is carefully packaged to ensure maximum protection during transit. The diaphragm is placed in a sealed plastic bag to prevent contamination and moisture exposure. It is then cushioned with foam or bubble wrap inside a sturdy cardboard box to avoid any damage from impact or pressure.

For shipping, we use reliable courier services that provide tracking and timely delivery. The packaging is labeled clearly with product information and handling instructions to ensure proper care throughout the shipping process. Bulk orders are securely packed in reinforced cartons to maintain product integrity.

We recommend inspecting the package upon arrival and reporting any damage immediately to ensure prompt resolution. Our packaging and shipping methods are designed to deliver the Pulse Valve Diaphragm in perfect condition, ready for installation and use.