About Eisele Pneumatics
Eisele Pneumatic Connectors & Industrial Fluid Fittings
Eisele, a German manufacturer with over 80 years of experience and part of the Henn Connector Group, specializes in high-quality connectors for pneumatics, hydraulics, vacuum, cooling water, compressed air, gases, and electrical signals. The company serves OEM and MRO customers across automotive assembly, food and beverage processing, pharmaceutical manufacturing, packaging machinery, and industrial automation across Europe, North America, and Asia.
The BASICLINE product family comprises over 3,500 standardized types of pneumatic connectors and fittings, offering a complete spectrum of screw-in connectors, push-in couplings, quick-disconnect couplings, and functional threaded connections for compressed air, vacuum, and industrial fluids. Materials include anodized aluminum (lightweight, corrosion-resistant for standard environments), brass and nickel-plated brass (durability, compatible with hydraulic oils), and galvanized steel (economical, suitable for non-corrosive gases).
INOXLINE is Eisele's stainless-steel push-in fitting line, manufactured from corrosion-free 1.4305 (304L equivalent) or acid-resistant 1.4401 (316L equivalent) materials, specifically engineered for hygiene-sensitive food processing, pharmaceutical, and chemical industries where stainless-steel materials are mandated by FDA or EHEDG (European Hygienic Engineering & Design Group) guidelines. All INOXLINE fittings are ATEX-certified where applicable and suitable for pressurized-gas and food-contact applications.
MULTILINE multiple-stem couplings deliver full flow and minimal pressure loss with Series 1811 one- or two-sided automatic shut-off, enabling quick connection of multiple pneumatic and hydraulic circuits simultaneously. Eisele fittings work reliably under difficult environmental conditions including extreme temperatures (–40°C to +100°C), dusty manufacturing floors, outdoor weather exposure, and high-vibration machinery without leakage or premature wear.
ChatMRO's AI procurement assistant lets you specify your fitting requirement—connector type (push-in, screw-in, quick-couple), pressure rating, bore size, thread type (NPT, BSPP, ISO metric), material (aluminum, brass, stainless steel), and application (compressed air, vacuum, hydraulic)—and instantly retrieves matching Eisele connectors, bulk packs, and accessory kits from our indexed catalog, eliminating manual catalog page searches or supplier contact delays.
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Frequently asked questions
What's the difference between push-in and screw-in pneumatic connectors, and which should I use?
Push-in (or one-touch) connectors are designed for quick, tool-free connection and disconnection, making them ideal for frequently reconfigured pneumatic setups, maintenance tasks, or portable equipment like air tools. Screw-in connectors require a wrench but typically provide a more robust, vibration-resistant connection suitable for permanently installed machinery. Push-in connectors are preferred for flexibility and ease of use; screw-in for durability and high-vibration environments.
Are Eisele BASICLINE and INOXLINE fittings directly interchangeable by size?
Yes—Eisele designs INOXLINE stainless-steel fittings to match BASICLINE size and thread specifications, enabling direct substitution in existing pneumatic systems. However, stainless steel (INOXLINE) is more expensive and heavier than aluminum or brass (BASICLINE), so substitution is only economical when corrosion resistance, cleanroom compatibility, or food-contact compliance is required. Always verify bore size and pressure rating match across both product families.
What pressure ratings do Eisele pneumatic connectors support?
BASICLINE and INOXLINE connectors are rated for 10, 16, 25, and 40 bar nominal working pressure depending on size and material. Always verify the printed or embossed pressure rating on each fitting before installation to avoid over-pressurization and system failure. Quick-couplings (MULTILINE) typically support 16–40 bar; confirm the coupler body pressure rating, not just the fitting threads.
Can Eisele pneumatic fittings be used with hydraulic systems?
Brass and nickel-plated-brass BASICLINE fittings are compatible with hydraulic oils and are rated for standard hydraulic pressures (up to 40 bar). However, not all BASICLINE materials are suitable for hydraulic service; always consult Eisele's material-compatibility data for your specific hydraulic fluid type (ISO VG 32, 46, 68, etc.). Aluminum and some stainless-steel variants are not recommended for hydraulic use due to galvanic corrosion or chemical incompatibility risks.
How do I prevent leakage at Eisele pneumatic connector joints?
Push-in connectors use internal O-rings (sealed during disconnection) and are inherently leak-resistant if properly inserted to full seating. Screw-in connectors require thread-sealant tape (PTFE, wrapping clockwise ~3–4 turns) or thread-sealant compound on the male thread to prevent micro-leakage; over-tightening will not seal—only proper sealant application works. Inspect O-rings annually and replace if they show cracks or discoloration from age or thermal cycling.