• SIlvent air knifes

    The Silvent Technology reduces turbulence and creates a more uniform, even, and straight air stream when blowing with compressed air. Also called a laminar air stream.

  • Silvent Technologies

    Lower the sound level by 50%. Save 35% of the energy usage. Minimise the risk of occupational accidents.


Silvent 4020-LF High Force Safety Air Guns

/Silvent 4020-LF High Force Safety Air Guns

Silvent 4020-LF High Force Safety Air Guns

SILVENT 4020-LF: a unique product with Laval nozzle that combines highly concentrated blowing force with an easily maneuverable valve construction and low sound level. Its blowing force of 100 N (22.1 lbs) is twice that of the 4015-LF. The nozzle is made of stainless steel, making it suitable for use in practically any environment where extra high blowing force is required, e.g. the paper and manufacturing industries, steel mills etc. Features adjustable blowing force that is easily adjusted to any strength between 0 and 100 %. Fully complies with EU Machine Directive noise limitations and OSHA safety regulations.

Download the latest Silvent Catalogue

Blowing properties at different pressures

SI units (kPa)2004006008001000
Blowing force (N)
Air consumption (Nm³/h)9.515.522.529.536.0
Sound level (dB(A))72.077.580.785.088.0
US units (psi)406080100120
Blowing force (oz)6.810.113.316.720.1
Air consumption (scfm)7.28.812.515.217.9
Sound level (dB(A))74.377.880.582.884.9

Extension pipes in 2 lengths

  • 500 mm (20”)
  • 1000 mm (40”)

The 4000 series is available with two different extension pipes. Custom lengths are available upon request. Choosing the right length is important to attain maximum safety and the best working posture. Specify the length of the extension pipe you require last in the order number. Safety gun-extension pipe length: e.g. 4020-LF-1000.


SI unitsUS units
Blowing force100.0 N22.1 lbs
Air consumption532 Nm³/h313.1 scfm
Sound level118 dB(A)
Blowing patternLaval
ConnectionG 3/4″3/4″-14 NPT
Connection typeFemale
MaterialStainless steel
Weight1.075 kg2.370 lbs
Max temp70 °C158 °F
Max operating pressure0.7 MPa100.0 psi


Replace open pipe25 mm1 inch
Noise reduction [dB(A)]13 dB(A)60 %
Air/cost savings [Nm³/h]627 Nm³/h54 scfm
Meet the EU Machine directivesYes