Flush-face quick couplings to ISO 16028, sizes 6,3 to 51 mm. Sealing faces are flush with the coupling ends, so fluid loss on disconnection is 0,02 ml at size 6,3 to 0,25 ml at size 25 and no dirt is trapped on reconnection.
Prices on request. Contact us for availability and quotations.
A flat-face coupling seals on two flush discs instead of a probe and a recessed poppet. That is the whole point of the pattern: there is almost nothing for oil to sit in when the halves are parted, and nothing for sand to lodge in before they are put back together. ISO 16028 Table 2 puts the maximum fluid loss per disconnection at 0,02 ml in size 6,3 and 0,25 ml in size 25. For comparison, FASTER lists 1,8 ml at 1/2 inch for its ISO 7241-A interchange range and 0,01 ml at the same size for its flat-face range - roughly two orders of magnitude.
Rated operating pressure is 315 bar in size 6,3, 250 bar from size 10 to 19 and 200 bar in size 25, with minimum burst at four times those figures. Rated flow runs from 12 l/min in size 6,3 to 189 l/min in size 25 at a maximum pressure drop of 1 bar. The 2023 edition widened the scope to 10 MPa to 31,5 MPa depending on size and added sizes 31,5, 38 and 51.
ISO 16028 states plainly that couplings to the document are not designed to connect or disconnect under pressure. Flat-face halves do not mate with ISO 7241 Series A or Series B: the flat-face male has no probe to enter a Series A female and its own female has no poppet for a probe to lift. Choose the interface for the fleet, not for the individual machine, and state size, interface, port thread and seal material at order.
| Interface Standard | ISO 16028 flush-face (flat-face) interface - sealing surfaces flush with the coupling end faces |
|---|---|
| Sizes | 6,3 / 10 / 12,5 / 16 / 19 / 25, extended in the 2023 edition to 31,5 / 38 / 51 |
| Rated Operating Pressure | 315 bar at size 6,3; 250 bar at sizes 10, 12,5, 16 and 19; 200 bar at size 25. The 2023 edition states a scope of 10 MPa to 31,5 MPa depending on coupling size |
| Minimum Burst Pressure | 1260 bar at size 6,3; 1000 bar at sizes 10 to 19; 800 bar at size 25 |
| Rated Flow | 12 l/min at size 6,3, 23 at 10, 45 at 12,5, 74 at 16, 100 at 19 and 189 l/min at size 25, at a maximum pressure drop of 1 bar; rated surge flow is three times these figures |
| Fluid Loss per Disconnection | Maximum 0,02 ml at size 6,3, 0,035 at 10, 0,07 at 12,5, 0,1 at 16, 0,15 at 19 and 0,25 ml at size 25 - the reason the flush-face pattern exists |
| Connection Under Pressure | Not permitted: couplings in accordance with ISO 16028 are not designed to connect or disconnect under pressure |
| Interchange | Flat-face halves do not mate with ISO 7241 Series A or Series B: the flat-face male has no probe and the flat-face female has no poppet for a probe to lift |
| Seal Material and Temperature | Not fixed by the standard. As a reference, FASTER rates its ISO 16028 interchange range (FFH) with NBR and PUR seals at -25 to +100 degrees C and 35 MPa |
| Construction | Female half with knurled sliding sleeve and flat sealing face; male nipple with a matching flat face, both flush with the end faces |
