A concrete pump truck rated at 40–120 m³/h can place concrete rapidly, but only its pressure setting determines whether that output can be sustained at the required height and pipeline distance [S1][S4].
The equipment combines an m³/h output rating with a delivery-line pressure rating: output governs theoretical pour time, while pressure governs whether the mix can reach the placement point [S3].
Output and pressure are separate performance limits
Concrete pump output is the volume moved through the delivery pipe in one hour, measured in m³/h. Pressure is the force available to move the mix and is measured in bar or MPa; the two ratings do not rise together, so a pump listed at 36 m³/h can develop more pressure than one listed at 95 m³/h [S3].
A 50 m³/h pump represents 120 tonnes of concrete per hour because 1 m³ weighs approximately 2,400 kg [S3]. For planning, theoretical duration equals concrete volume divided by rated output. A 40 m³/h pump requires 2.5 hours for 100 m³ at its theoretical rate, before mixer waiting, hose movement, setup, and other interruptions [S6].
Published classifications place small truck-mounted pumps at 40–80 m³/h and medium truck-mounted pumps at 80–120 m³/h [S4]. This classification is less precise than the machine plate because boom reach, pipeline arrangement, and mix design remain separate constraints [S1][S4].
Compare the main pump configurations
Trailer pumps are suited to smaller pours and relocatable setups, while truck-mounted and boom pumps are selected when the placement point must be reached without laying a long ground pipeline. A trailer-mounted pump can be specified up to 40 m³/h, with vertical reach up to 50 m; small truck-mounted pumps cover 40–80 m³/h and 50–70 m of vertical reach [S4].
Medium truck-mounted pumps commonly cover 80–120 m³/h and 70–90 m of vertical reach [S4]. The broader boom-pump range cited in another equipment guide is 50–150 m³/h, with aggregate conveyed within 180 ±20 mm [S5]. These ranges describe machine families, not guaranteed site production.
Selection criteria should be separated rather than blended. Output controls estimated placement time, pressure supports vertical lift and pipeline resistance, boom reach determines direct placement range, and pipeline layout determines added friction and horizontal pumping distance [S1][S4]. The concrete pump truck configuration is appropriate when vehicle access, outrigger space, and boom placement are available.
Pressure setting changes achievable output
Boom pump trucks commonly use a lower pressure setting averaging 85 bar, equivalent to 1,233 psi, and a higher setting averaging 130 bar, or 1,885 psi [S2]. The higher-pressure mode applies hydraulic force over the greater piston area, creating more working-line pressure but fewer strokes per minute and therefore lower output [S2].
Across 46 stationary pumps publishing both rod-side and piston-side values, 45 follow the same pattern: the higher-output setting has the lower pressure [S3]. The AJAX ASP 4011 illustrates the trade-off with 40 m³/h at 75 bar on the rod side and 30 m³/h at 108 bar on the piston side [S3]. A quotation based on only one side is incomplete if the intended placement requires high lift or a long pipeline.
For stationary equipment, the published bands are 20–60 m³/h at 6–10 MPa for medium-pressure pumping and 80–100 m³/h above 10 MPa for high-pressure pumping [S1]. These values describe rated combinations, not the flow produced after every site loss or restriction.
Match rated pressure to the placement challenge
Low-pressure pumping at or below 5 MPa is associated with outputs up to 10 m³/h and horizontal transmission up to 100 m [S1]. Medium-pressure equipment rated at 6–10 MPa combines 20–60 m³/h output with 100–200 m horizontal transmission and vertical transport up to 80 m [S1].
High-pressure equipment above 10 MPa is associated with 80–100 m³/h output, horizontal transmission of at least 200 m, and vertical transport of at least 80 m [S1]. A concrete pump truck rated at 7.5–10 MPa and 85–200 m³/h therefore occupies a different part of the performance envelope from a small 40 m³/h stationary pump [S1].
Boom reach must not be treated as proof that the pump can place concrete at the boom tip under full pressure. The line arrangement, bends, hose condition, vertical lift, mix slump, aggregate size, and pumping speed all influence the pressure needed to maintain output [S1][S2]. A truck-mounted concrete pump can be evaluated by separating the high-output production mode from the high-pressure placement mode.
Plan for theoretical rate and operating losses
A practical pumping calculation divides required volume by rated m³/h and then applies an efficiency factor commonly set at 0.65–0.80, with 30–60 minutes added for setup [S7]. At 40 m³/h and 70% efficiency, the effective planning rate is 28 m³/h, making a theoretical 2.5-hour pumping window approximately 3.6 hours before setup is included [S6][S7].
The efficiency factor accounts for operational realities that the theoretical rating does not, including waiting for mixer trucks, friction within the line, repositioning of the delivery hose, and interruptions [S3][S7]. A 100 m³ daily placement using a 40 m³/h pump can be feasible in many cases, but the calculation must retain time for setup and leave a controlled margin for delivery interruptions [S6].
For a production comparison, the 30 m³/h piston-side rating at 108 bar represents a 25% reduction in theoretical output relative to the 40 m³/h rod-side rating at 75 bar [S3]. By contrast, comparing 36 m³/h with 95 m³/h does not establish the pressure capability of either machine without its second rating [S3].
Protect the delivery system at rated pressure
All pipe, bends, hoses, clamps, and other delivery-system components must be rated for at least the pump’s working pressure under ASME B30.27 in the United States and CSA Z151 in Canada [S2]. Delivery components should be labeled with their maximum working pressure and inspected because wear reduces the pressure that aged pipe, bends, and hoses can safely contain [S2].
Pressure in a long delivery line decreases as distance from the pump increases, but the reduction depends on pipeline setup, mix design, and pumping speed [S2]. A blockage can trap concrete between the pump and plug, pressurizing that section to a level near the machine’s maximum delivery-line pressure [S2].
The manufacturer’s owner’s manual or machine tag therefore takes priority over a generic web range. Confirm the model, rod-side and piston-side output, delivery working pressure, maximum boom reach, and pipeline component ratings before accepting a production commitment. Further selection detail is available in Compare Concrete Pump Truck Reach and Output.