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Silvent 707 L

SILVENT 707 L: a stainless steel Laval nozzle. Compressed air is utilized optimally in this nozzle and its introduction constitutes a new dimension in blowing technology. The effect is achieved by surrounding a core of air traveling at supersonic speed with a protective sheath of air moving parallel to the central air jet. The central stream of air in the SILVENT 707 L is generated by a Laval nozzle. The design of the nozzle converts all of the energy stored in the compressed air into kinetic energy without permitting the air jet to expand laterally after leaving the nozzle. The protective sheath of air prevents the core stream from being slowed down by the surrounding air and allows it to be utilized at full effect. This hinders the creation of turbulence and thereby lowers the sound level. Fully meets the EU Machine Directive’s noise limitation requirements and OSHA’s safety regulations.
Noise reduction 78%
Air/cost savings 55%


SI units US units  
Blowing force21.0 N4.6 lbs
Air consumption120 Nm³/h70.6 scfm
Sound level94 dB(A)
Blowing patternLaval
ConnectionG 1/2" 1/2"-14 NPT
Connection typeFemale
Dimensions 23x33 mm 0.91x1.30 inch
MaterialStainless steel
Weight0.050 kg0.110 lbs
Max temp400 °C752 °F
Max operating pressure1.0 MPa143.0 psi


Replace open pipe12 mm1/2 inch
Noise reduction [dB(A)]22 dB(A)78 %
Air/cost savings [Nm³/h]146 Nm³/h55 %
Meet the EU Machine directivesYes

Blowing properties at different pressures

SI units (kPa)2004006008001000
Blowing force (N)9.016.925.033.240.9
Air consumption (Nm³/h)60.999.8139.1176.9219.8
Sound level (dB(A))87.892.395.197.098.6
US units (psi)406080100120
Blowing force (oz)44.363.281.5102.1120.2
Air consumption (scfm)46.860.676.190.9109.1
Sound level (dB(A))91.092.794.495.396.7

Air cone patterns and velocity distribution

SI units (mm)50100200300400500
Blowing pattern (ø)95140190235280330
Velocity (m/s)255203103765550
US units (inch)248121620
Blowing pattern (ø)3.745.517.489.2511.0212.99
Velocity (ft/s)837666338249180164

Blowing pattern

100 (4")
200 (8")
300 (12")
140 (5.51")
190 (7.48")
235 (9.3")