What is flow rate in pump?

Volume flow rate (Q), also referred to as capacity, is the volume of liquid that travels through the pump in a given time (measured in gallons per minute or gpm). It defines the rate at which a pump can push fluid through the system.

How do you calculate pump discharge flow rate?

Calculating the desired flow rate of your pump is quite easy. Let’s say, you want to transport 300 litres of a fluid every 30 minutes, then your pump system has to transport 300/30 = 10 litres per minute or 0.167 litres per second. This is the desired flow rate, which is usually calculated before the installation.

How is pump power calculated PDF?

Pump Power calculation Formula: Pump Power P(kW) = q(m3/hr) x ρ(kg/m3) x g(m2/s) x h(m) x p(Pa) / 3600000. The same way pump power in horsepower formula can be written as, Pump Power P(HP) = q(m3/hr) x ρ(kg/m3) x g(m2/s) x h(m) x p(Pa) / 2685600. Also above pump power is required to lift the liquid to head meters.

How do you calculate LPM?

Flow rate (L/min) = [Bucket Size (L)] ÷ [Fill time (sec)] × 60 × 0.8

  1. 60 is to convert the unit to minutes.
  2. 0.8 refers to a 20% reduction in flow rate to allow for pressure loss in your system. If the bucket test is taken off the main water feed at the correct pressure then this 20% allowance is not necessary.

How do you calculate pump minimum flow?

Minimum Flow : THERMAL and STABLE

  1. A minimum required flow rate should be specified.
  2. Qmin = (P x 3600) / (ρ.c.∆t)
  3. Qmin = m3/hr (min.
  4. P = power (kw) (at or near shutoff)
  5. ρ = density of the liquid (kg/m3) (i.e. water = 1, HC = 0.3 – 0.6)
  6. c = specific heat of the fluid (kj/kgk)
  7. ∆t = permissible heat up, ºC.

What is LPM in pump?

Flow. Flow is the rate that the liquid has to be moved throughout a system. In SI units, it’s measured in litre per minute (lpm) or metre per hour (m3/h).