Can the Safety socket DN7.4, for air, unpressurised, 12 bar be disconnected safely with the push-button while still pressurised?

Yes . the Safety socket DN7.4, for air, unpressurised, 12 bar can be disconnected safely with the push-button while the line is still pressurised. The coupling uses a two-stage push-button locking mechanism: the first press vents the coupling while keeping the plug mechanically secured (pressure is safely released through the vent), and the second press unlocks and releases the plug for removal. This design complies with ISO 4414 and EN 983, is intended to prevent sudden ejection of the plug, and requires recommended steel plugs with the EURO DN7.2 profile. Operating limits: max 12 bar (normal testing/flow data given at Pe = 6 bar), temperature -10Â°C to +90Â°C, NBR seals.

How does the Safety socket DN7.4, for air, unpressurised, 12 bar ensure two-stage safe disconnection with the push-button?

Safety socket DN7.4, for air, unpressurised, 12 bar ensures two-stage safe disconnection with the push-button by using a sequential vent-and-release mechanism. On first press the push-button opens an internal vent path that depressurises the coupling while the plug remains mechanically locked; residual air escapes through the vent so downstream lines are made safe. On second press the locking release is actuated and the plug is freed for removal. Construction (galvanized steel outlet, anodized aluminum middle, nickel-plated brass inlet, stainless springs/balls) and NBR sealing maintain tightness and durability. Recommended steel plugs with EURO DN7.2 profile complete the system, ensuring compliant, safe, two-stage disconnection per ISO 4414 and EN983.

What maintenance is required for the Safety socket DN7.4, for air, unpressurised, 12 bar to ensure reliable two-stage operation?

Safety socket DN7.4, for air, unpressurised, 12 bar. maintenance for reliable two-stage operation: 1. Regular visual inspection (weekly/monthly depending on use) - Check body for corrosion, cracks or mechanical damage (galvanized steel, anodized aluminum, nickelâplated brass parts). - Verify pushâbutton and locking mechanism move freely and are not clogged or deformed. - Ensure inlet/outlet threads or hose end are undamaged and seal properly. 2. Seal and internal component check (monthly/quarterly) - Inspect NBR sealing for cuts, hardening or swelling; replace if any deterioration. - Check stainless springs and balls for wear, pitting or corrosion; replace if any signs of malfunction. - Confirm plug compatibility (use recommended steel plugs with EURO DN7.2 profile) and inspect plug sealing surfaces. 3. Functional test (weekly/monthly) - With supply pressure present, perform twoâstage disconnection test: a) Press button once. verify venting occurs while plug remains secured. b) Press button a second time. verify plug releases smoothly and safely. - Check for air leaks during both stages; minor leaks require immediate seal replacement. 4. Cleaning and lubrication (periodic, e.g. quarterly or after contamination) - Clean external and accessible internal parts of dust/oil/residues with appropriate solvent compatible with NBR. - Lightly lubricate moving parts with pneumaticâsafe grease that is compatible with NBR seals (avoid oils that degrade NBR). 5. Pressure and temperature considerations - Do not exceed working pressure 12 bar; operate within â10Â°C to +90Â°C to avoid seal failure. - If used near extremes, inspect seals and components more frequently. 6. Replacement and spare parts - Keep spare NBR seals, stainless springs/balls and recommended steel plugs available. - Replace worn parts immediately; do not attempt field repairs that compromise twoâstage safety. 7. Record keeping - Log inspections, tests and part replacements to maintain traceability and safety compliance (ISO 4414 / EN 983). Following these steps preserves the Safety socket DN7.4âs reliable twoâstage venting and release function and ensures safe operation.

Safety socket DN7.4, for air, unpressurised, 12 bar

All products, General-purpose low-pressure quick couplings/

Additional information

Material	IS – other metal (alloy)

Socket with shut-off valve quick coupling EWO series EW-411 SAFETY, DN7.4, with external thread or hose end. Air quick coupling disconnectable without pressure, equipped with a push-button locking mechanism. Compliance with ISO 4414 and EN983 standards. Disconnection occurs in two stages: the first press of the button vents the quick coupling with the plug secured. The second press releases the plug, which can be safely removed. Recommended plugs made of steel (not brass), with a profile compliant with the popular EURO DN7.2 standard. Material: – socket body: outlet – galvanized steel, middle part – anodized aluminum, inlet part – nickel-plated brass; – springs and balls made of stainless steel. Flow rate: 1800 l/min (Pe = 6 bar, Δp = 1 bar, air). Working pressure: 12 bar. Operating temperature: from -10°C to +90°C. Sealing: NBR.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
EW-411-001	Quick coupling socket EW-411 SAFETY DN7.4 with GZ 1/4" BSP		12	In stock	Enquiry
EW-411-023	Quick coupling socket EW-411 SAFETY DN7.4 with end for 6 mm hose	6	12	In stock	Enquiry
EW-411-024	Quick coupling socket EW-411 SAFETY DN7.4 with end for 9 mm hose	8	12	In stock	Enquiry
EW-411-026	Quick coupling socket EW-411 SAFETY DN7.4 with end for 8 mm hose	8	12	In stock	Enquiry

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Socket with shut-off valve quick coupling EWO series EW-411 SAFETY, DN7.4, with external thread or hose end. Air quick coupling disconnectable without pressure, equipped with a push-button locking mechanism. Compliance with ISO 4414 and EN983 standards. Disconnection occurs in two stages: the first press of the button vents the quick coupling with the plug secured. The second press releases the plug, which can be safely removed. Recommended plugs made of steel (not brass), with a profile compliant with the popular EURO DN7.2 standard. Material: – socket body: outlet – galvanized steel, middle part – anodized aluminum, inlet part – nickel-plated brass; – springs and balls made of stainless steel. Flow rate: 1800 l/min (Pe = 6 bar, Δp = 1 bar, air). Working pressure: 12 bar. Operating temperature: from -10°C to +90°C. Sealing: NBR.