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.

Safety socket DN7.4, for air, swivel, non-pressurised disconnecting, threaded, 16 bar

Q: 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.

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

Additional information

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

Rotary socket with shut-off valve quick coupling EWO series EW-411 SAFETY DN 7.4 with external or internal BSP thread. One-sided shut-off quick coupling for air, disconnectable without pressure, equipped with a push-button locking mechanism. Venting the quick coupling before disconnection prevents the recoil effect when the plug is disconnected. This ensures operator safety in accordance with ISO 4414 and EN983. The 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 be safely removed. The ability to rotate the socket allows for easy positioning of the button in a convenient location after being screwed 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. Upon request, sockets can be made in other colors: black, red, gray, yellow, green, or entirely made of stainless steel. Material: – socket body: outlet – galvanized steel, middle part – anodized aluminum, inlet part – nickel-plated brass; – springs and balls made of stainless steel. Performance: 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	Safety quick coupling socket DN7.4, button, rotary, GZ 1/4" BSP	-	16	In stock	Enquiry
EW-411-402	Safety quick coupling socket DN7.4, button, rotary, GW 1/4" BSP	-	16	In stock	Enquiry
EW-411-421	Safety quick coupling socket DN7.4, button, rotary, GZ 3/8" BSP	-	16	In stock	Enquiry
EW-411-422	Safety quick coupling socket DN7.4, button, rotary, GW 3/8" BSP	-	16	In stock	Enquiry
EW-411-441	Safety quick coupling socket DN7.4, button, rotary, GZ 1/2" BSP	-	16	In stock	Enquiry
EW-411-442	Safety quick coupling socket DN7.4, button, rotary, GW 1/2" BSP	-	16	In stock	Enquiry

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Rotary socket with shut-off valve quick coupling EWO series EW-411 SAFETY DN 7.4 with external or internal BSP thread. One-sided shut-off quick coupling for air, disconnectable without pressure, equipped with a push-button locking mechanism. Venting the quick coupling before disconnection prevents the recoil effect when the plug is disconnected. This ensures operator safety in accordance with ISO 4414 and EN983. The 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 be safely removed. The ability to rotate the socket allows for easy positioning of the button in a convenient location after being screwed 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. Upon request, sockets can be made in other colors: black, red, gray, yellow, green, or entirely made of stainless steel. Material: – socket body: outlet – galvanized steel, middle part – anodized aluminum, inlet part – nickel-plated brass; – springs and balls made of stainless steel. Performance: 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.