Power & Speed
Motor power, pump flow, speeds, pipeline pressure loss and oil tank thermal check.
⚡ Press (constant power pump)
🕐 Speed Calculation
mm
mm
ml/r
r/min
L/min
Pressing speedmm/s
Fast down speedmm/s
Return speedmm/s
🔧 Pipeline Size & Loss
L/min
mm
mm
MPa
m
mm²/s
kg/m³
Pipe flow velocitym/s<6
Pipe wall stressMPa
Pressure loss ΔpMPa
Reynolds number—
📌 Note
Press flow Q = P·10³/p · v·60/10⁶. Motor power = Q·p/(600·η). Speeds v = Q·10⁶/(A·60) using annulus / rod / bore area.
Line loss (Darcy–Weisbach): Δp = f·(L/d)·ρ·v²/2, Re = v·d/ν, f = 64/Re (laminar) or 0.316/Re^0.25 (turbulent). Thermal: H = P_hyd·(1−η)/η, ΔT = H/(k·A), k≈0.025 kW/m²K. Check oil ≤60 °C, add cooler if exceeded.
Cooling: if Pcool>0 → A = Pcool·1000/(kc·(Tallow−Tamb)), kc≈300~500 W/m²K, then pick a standard cooler.
Pump displacement D = q·1000/n; useful press power P = F·vslow/1000; specific power P/N gauges drive economy at nominal force.