EMG SV1-10 /100 vs /315 Pressure Versions
The 100 and 315 fields in an SV1-10 type code identify pressure versions. Data sheet DB_SV1-10_05_en lists 5–100 bar for the /100 version and 30–315 bar for /315. The difference includes minimum operating pressure, not just the upper limit.
A guiding branch that runs at 20 bar falls within the /100 range but below the listed /315 range. Replacing /100 with /315 does not automatically preserve every original operating condition.
Flow and pressure are separate code fields
Compare SV1-10/16/100/6 with SV1-10/16/315/6. Both have the 16 L/min flow size and 6% overlap; the pressure version changes. Rated flow still refers to a 20 bar valve pressure drop. Neither 100 nor 315 is the pressure drop the valve must consume.
| Parameter | /100 version | /315 version |
|---|---|---|
| Operating pressure range | 5–100 bar | 30–315 bar |
| Flow code in this example | /16 | /16 |
| /16 rated-flow condition | 16 L/min at 20 bar valve drop | 16 L/min at 20 bar valve drop |
| Maximum return pressure in the data sheet | 30 bar | 30 bar |
Supply pressure, valve pressure drop and return pressure are different quantities. Select the pressure version from actual valve-inlet operating pressure, calculate flow from available metering pressure drop, and check the T-port limit separately. The SV1-10 model guide explains the individual fields.
A low-pressure guiding branch calls for /100
Consider a strip-guiding machine with a small independent power unit. Normal supply is 20 bar, adjustable from 12 to 25 bar. That entire band is within /100, while none of it reaches the listed 30 bar minimum for /315.
This gives a clear basis for choosing /100. More /315 valves in stock is not a reason to substitute one simply because it fits the mounting surface. After matching pressure range, use cylinder area and guiding speed to choose among 4, 8, 16, 32 and 48 L/min flow sizes.
If the mechanism lacks force at low pressure, calculate the required actuator force. A higher-pressure valve version does not increase power-unit pressure or cylinder force by itself.
A 160 bar operating branch calls for /315
On another machine, the guiding valve connects directly to a 160 bar branch and remains above 100 bar during adjustment and motion. That exceeds the /100 range, so select /315 and keep actual pressure and fluctuations within its permitted range.
The /315 version does not upgrade the other circuit components. Select the cylinder, hoses, fittings and manifold for actual circuit pressure. Return pressure remains limited to 30 bar; a high inlet-pressure capability does not grant the T port the same rating.
On machines with shared return headers, record T-port peaks during other cylinders' rapid return strokes. Low return pressure during isolated operation does not establish compliance during simultaneous movements.
Both ranges cover a 60 bar system
At a stable 60 bar valve inlet, both /100 and /315 ranges apply. Maximum pressure alone does not decide the choice. For replacement, retain the original pressure version and check flow size, overlap and electrical connection.
Typical internal leakage differs between the versions under the same test conditions. For the 16 L/min size with 6% overlap, the data sheet lists 0.7 L/min for /100/6 and 0.4 L/min for /315/6 at 100 bar supply, 0 mA input, 50 °C oil and no output flow at A/B.
This shows that the pressure version involves more than a different upper-limit marking. The comparison is at 100 bar, so it does not establish leakage in a machine operating at 60 bar. Nor does the 0.3 L/min difference determine positioning accuracy. A change of version should address the actual supply and motion requirements.
A pressure cycle spanning both ranges
Some power units unload at 20 bar and rise to 160 bar for operation. If the SV1 must control throughout both phases, /100 exceeds its upper limit and /315 does not cover the low-pressure phase. Neither basic range fully covers 20–160 bar.
If guiding is not required during the 20 bar phase, the machine sequence can engage guiding only after supply reaches the selected valve's operating range. If control is required at low pressure too, redesign the supply branch so that valve-inlet pressure remains suitable throughout control operation.
For example, reducing a 200 bar header to 80 bar places /100 within a suitable supply range, but introduces throttling loss. At 12 L/min through the reducing stage, a 120 bar drop dissipates approximately 2.4 kW of hydraulic power. The power unit must handle that heat.
Such a branch requires appropriate reducing-valve capacity, pressure protection and cooling. It is a circuit-design change, not simply an extra valve added to use available stock.
Selection
For guiding at 5–30 bar supply, choose /100. For an operating branch above 100 bar and no higher than 315 bar, use /315. In the overlapping 30–100 bar region, select according to the original configuration and actual requirements. Record minimum, normal and maximum inlet pressures plus return peaks instead of relying on a single power-unit nominal pressure.