SK/Metric couplings

Couplings particularly suitable for working pressures from 85 bar up to 130 bar. Mainly used for concrete pumping booms as they allow the rotation of pipes. SK/Metric couplings are also suitable for both horizontal and vertical concrete distribution pipelines.

Fixed-lever couplings and adjustable-lever couplings are basically interchangeable with each other, their use is the same, the only difference is that one has a fixed and unchangeable clamping (fixed coupling) and the other, having a ‘screw’ inside it, has an adjustable clamping (adjustable coupling). Concrete pump arms normally have fixed lever clamps so that the operator does not have the option of loosening them.

Safety pins are applied in the coupling closure to prevent accidental opening and comply with the CE standard EN 12001, which makes their application mandatory.

All of our couplings have internal testing. Testing is carried out at a certain frequency, which is specified by our ISO 9001: 2015 quality management system. We define the breaking point by doing sample tests where the joint is initially brought to a pressure of 85 bar and after 10 seconds, we gradually increase the pressure (by 10 bar every 10 seconds) until we reach the breaking point. Example of one of our test and inspection certificate.

Coupling Test

FIXED LEVER COUPLINGS

fixed lever coupling
Fixed lever coupling
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25003000VG 3” 189 7.44 139 5.47 2.38 5.25 100 1450
25004000VG 4" 216 8.50 173 6.81 2.8 6.17 85 1232
25004500VG 4” ½ 242 9.53 186 7.32 4.08 8.99 100 1450
25005000VG 5" 246 9.68 206 8.11 3.80 8.37 85 1233
25005500VG 5” ½ 257 10.12 210 8.27 4.00 8.82 85 1233
25006000V 6” 296 11.65 234 9.21 5.68 12.52 100 1450
Fixed lever coupling
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25003413VG 3” ¼ 196 7.72 146 5.75 3.10 6.83 100 1450
25006513VG 6” ½ 307 12.09 249 9.80 7.50 16.53 85 1233
25007013VG 7” 332 13.07 269 10.59 8.10 17.86 85 1233

ALUMINIUM FIXED LEVER COUPLING

Our cutting-edge technology let us to produce a 5″1/2 aluminium coupling. It combines lightness and resistance: only 2,4 kg weight and 110 bar working pressure.

Vega aluminium coupling
Fixed lever coupling
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25505500V 5” 1/2 271 10.67 223 8.78 2.40 5.29 110 1595

FIXED LONG LEVER COUPLINGS

fixed long lever coupling
long lever coupling clamp
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25002099 2” 152 5.98 110 4.33 1.50 3.30 85 1232
25002599 2"½ 163 6.41 128 5.03 1.75 3.85 85 1232
25003099VG 3” 186 7.32 148 5.82 2.45 5.4 100 1450
25004099VG 4” 216 8.50 175 6.89 3 6.61 85 1232
25004599VG 4” ½ 236 9.29 192 7.56 4.2 9.25 100 1450
25005099VG 5” 246 9.68 209 8.23 4.15 9.14 85 1232
25005599VG 5” ½ 267 10.51 224 8.82 4.75 10.47 100 1450

ADJUSTABLE LEVER COUPLINGS

Adjustable lever coupling
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25003001VG 3” 189 7.44 139 5.47 2.90 6.39 100 1450
25003401VG 3” ¼ 196 7.72 146 5.75 3.00 6.61 100 1450
25004001VG 4” 222 8.74 170 6.69 3.80 8.38 100 1450
25004501VG 4”½ 242 9.53 186 7.32 4.80 10.58 100 1450
25005501VG 5” ½ 272 10.73 204 8.03 5.80 12.79 100 1450
25006001VG 6” 296 11.65 234 9.21 6.80 14.99 100 1450
25006501VG 6” ½ 307 12.09 249 9.80 7.30 16.09 85 1233
25007001VG 7” 332 13.07 269 10.59 8.20 18.08 85 1233
25008001VG 8” 343 13.50 276 10.87 8.50 18.74 20 2175

ONE BOLT COUPLINGS

One bolt coupling
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25003003VG 3” 189 7.44 122 4.80 2.60 5.73 100 1450
25003403VG 3” ¼ 196 7.72 129 5.08 2.70 5.95 100 1450
25004003VG 4” 222 8.74 150 5.91 3.30 7.28 100 1450
25004503VG 4” ½ 242 9.53 168 6.61 4.30 9.48 100 1450
25005503VG 5” ½ 272 10.73 193 7.62 4.90 10.80 100 1450
25006003VG 6” 296 11.65 214 8.43 5.60 12.35 100 1450
25006503VG 6” ½ 307 12.09 225 8.86 6.20 13.67 85 1233
25007003VG 7” 332 13.07 247 9.72 6.60 14.55 85 1233

TWO-BOLT COUPLINGS

two bolt coupling
two bolt coupling clamp
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25004502 4” 1/2 202 7.95 167 6.57 3.30 7.28 85 1233
25005502VG 5” 1/2 230 9.06 193 7.60 4.10 9.04 125 1813

FOUR-BOLT COUPLINGS

coupling 4 bolts
Code DN A B icona peso icona orologio
inch mm inch mm inch kg lbs bar psi
25005528 5” 193 7.60 187 7.36 4.2 9.04 130 1885

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