Does the Safety socket DN7.4, for air, swivel, non-pressurised disconnecting, threaded, 16 bar allow disconnection under residual pressure if the vent button is blocked?

Safety socket DN7.4, for air, swivel, non-pressurised disconnecting, threaded, 16 bar . does it allow disconnection under residual pressure if the vent button is blocked? No. The Safety socket DN7.4 is designed for non-pressurised disconnecting: the built-in push-button venting must be operated first to vent residual pressure while the plug remains secured, then a second press releases the plug. If the vent button is blocked and cannot vent, the coupling cannot be safely depressurised and therefore should not be disconnected under residual pressure. Attempting to disconnect without proper venting risks recoil and operator injury and would contravene ISO 4414 and EN983.

Can the Safety socket DN7.4, for air, swivel, non-pressurised disconnecting, threaded, 16 bar be disconnected if the vent button fails?

Safety socket DN7.4, for air, swivel, non-pressurised disconnecting, threaded, 16 bar: If the vent button fails, the coupling cannot be safely disconnected under pressure. The design requires a first press to vent and a second press to release the plug; without venting, disconnecting risks recoil and unsafe release. Therefore do not attempt disconnection if the venting function is inoperative - depressurize the line by other means before removing the plug to comply with ISO 4414/EN983 and ensure operator safety.

Can the Safety socket DN7.4, for air, swivel, non-pressurised disconnecting, threaded, 16 bar be rotated under pressure to reposition the vent button?

Yes. The Safety socket DN7.4, for air, swivel, non-pressurised disconnecting, threaded, 16 bar can be rotated under pressure to reposition the vent button. The product description explicitly states that the ability to rotate the socket allows easy positioning of the button in a convenient location after being screwed to the installation, even under pressure. This feature, combined with the one-sided shut-off and push-button two-stage venting (first press vents with plug secured, second press releases the plug), ensures safe operation and prevents recoil during disconnection in accordance with ISO 4414 and EN983.

Socket quick coupling safe DN7.4, for air, swivel, disconnected without pressure, with a thread, 16 bar

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

Additional information

Material	CS – steel (cast iron)
Standard length [m]	4

Rotary socket with a shut-off valve, EWO series EW-411 SAFETY DN 7.4, with a BSP male or female thread. A single shut-off quick coupling for air, disconnected without pressure, fitted with a push-button locking mechanism. Venting the quick coupling before disconnection avoids the recoil effect when the plug is disconnected. This ensures the operator’s safety in accordance with ISO 4414 and EN 983. Operation of the quick coupling is simple: the first press of the button vents the quick coupling with the plug secured. The second press releases the plug, which can then be safely removed. The ability to rotate the socket allows the button to be easily set in a convenient position after screwing it to the installation, even under pressure. Plugs with a profile compliant with the popular EURO DN7.2 standard, made of steel (not brass), are recommended for the socket. On request, the sockets can be made in a different color: black, red, grey, yellow, green, or entirely of stainless steel. Material: – socket body: outlet – galvanized steel, central part – anodized aluminum, inlet part – nickel-plated brass; – springs and balls of stainless steel. Flow rate: 1960 l/min (Pe = 6 bar, Δp = 1 bar, air). Working pressure: 16 bar (minimum 1 bar). Operating temperature: from -20°C to +100°C. Sealing: NBR.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
EW-411-401	Quick coupling socket SAFETY DN7.4, push-button, swivel, 1/4" BSP male	-	16	In stock	Enquiry
EW-411-402	Quick coupling socket SAFETY DN7.4, push-button, swivel, 1/4" BSP female	-	16	In stock	Enquiry
EW-411-421	Quick coupling socket SAFETY DN7.4, push-button, swivel, 3/8" BSP male	-	16	In stock	Enquiry
EW-411-422	Quick coupling socket SAFETY DN7.4, push-button, swivel, 3/8" BSP female	-	16	In stock	Enquiry
EW-411-441	Quick coupling socket SAFETY DN7.4, push-button, swivel, 1/2" BSP male	-	16	In stock	Enquiry
EW-411-442	Quick coupling socket SAFETY DN7.4, push-button, swivel, 1/2" BSP female	-	16	In stock	Enquiry

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Rotary socket with a shut-off valve, EWO series EW-411 SAFETY DN 7.4, with a BSP male or female thread. A single shut-off quick coupling for air, disconnected without pressure, fitted with a push-button locking mechanism. Venting the quick coupling before disconnection avoids the recoil effect when the plug is disconnected. This ensures the operator’s safety in accordance with ISO 4414 and EN 983. Operation of the quick coupling is simple: the first press of the button vents the quick coupling with the plug secured. The second press releases the plug, which can then be safely removed. The ability to rotate the socket allows the button to be easily set in a convenient position after screwing it to the installation, even under pressure. Plugs with a profile compliant with the popular EURO DN7.2 standard, made of steel (not brass), are recommended for the socket. On request, the sockets can be made in a different color: black, red, grey, yellow, green, or entirely of stainless steel. Material: – socket body: outlet – galvanized steel, central part – anodized aluminum, inlet part – nickel-plated brass; – springs and balls of stainless steel. Flow rate: 1960 l/min (Pe = 6 bar, Δp = 1 bar, air). Working pressure: 16 bar (minimum 1 bar). Operating temperature: from -20°C to +100°C. Sealing: NBR.