S 20


View S 20 Brochure






Vertical Reach 63’ 9″ 19.4 m
Horizontal Reach 51’ 10” 15.8 m
Below Grade Reach w/ Tip Hose 35’ 5” 10.8 m
Pipeline Diameter 5 in 125 mm
Boom Type/ Sections Double Z / 4
Boom Rotation 740 degrees
Unfolding Height 12’ 8” 3.9 m
Outrigger Type- Front Manual Extension & Hydraulic Jacking
Outrigger Type- Rear Hydraulic Jacking
Outrigger Soil Pressure w/o Dunnage (front/rear) 315/200 psi 21.7/13.8 bar
Outrigger Soil Pressure w/ Dunnage (front/rear) 44/28 psi 3/1.9 bar
Outrigger Width, Front 12′ 8″ 3.8 m
Outrigger Width, Rear 7′ 1″ 2.2 m
Outrigger Length 15′ 4″ 4.7 m




Theor. Concrete Output 145 cu yds/h 111 cu m/h
Max. Pressure on Concrete 1015 psi 70 bar
Max. Strokes Per Minute 29
Max. Aggregate size 2.5 in 63.5 mm
Material Cylinder Diameter 8 in 200 mm
Material Cylinder Stroke 79 in 2000 mm
Differential Cylinder Diameter 4.7 in 120 mm
Maximum Oil Flow 100 gal/min 380 l/min
Hydraulic Circuitry Type Twin Circuit
Valve Type M Rock
*Pump specifications are for standard units. Other units are available. Specifications are subject to change without prior notice.


Advantages of the S 20 with boom delivery line DN 100:

  • Higher load capacity due to a lighter delivery line
  • The support width is the same as the vehicle width
  • because the front and rear outriggers are extended
  • only vertically, which widens the possible applications.
Advantages of the S 20 with boom delivery line DN 125:

  • Reduced wear when pumping via the boom
  • Simple pumping of concrete with a larger aggregate size

Generation 3 Pump Kit

Outperforms every other concrete pump on high visibility projects while also placing millions of yards on everyday pours.  

Vector Controls

Valuable operational data at your fingertips to allow monitoring of the pumping process from the remote control box.  

Rock Valve™

No other sequencing valve combines lowest cost per yard maintenance costs and ease of rebuilding as the Rock Valve™.
"Have the pump out and running and I am really impressed. Even all the sceptics now think it was a good idea. Did 50 yards in a 16’ ceiling and could not be happier. Only thing I would change is a toolbox above the battery box so you don’t have to climb up on the truck so much."

- Andy H. Stachler, Stachler Concrete , St. Henry, OH
"High utilization of the equipment is the name of the game for concrete pumpers which is why I own three 17-meter boom pumps and the S 20. We have a lot of customers who specifically request our small boom pumps, so when I was introduced to the S 20 with the 4-section boom I instantly recognized it as a tool we could use.”

-  Jim Toothaker, owner, Independent Concrete Pumping, Wakefield, MA
Do you own this pump? Email a review to marketing@schwing.com.