The submersible centrifugal multistage sectional pumps type PV are designed for transportation of water from big depths with big fluctuation level of underground waters, with mechanical admixtures (sand, clay) up to 50 mg/l, size of particles up to 0.5 mm. Admissible water temperature is 25°C. Admissible water aggressiveness is up to pH=6¸8.
      The pumps type PV are completed with submersible electric motors with voltage of 380v. and frequency 50Hz.
      The electric motors with different voltage and frequency can be manufactured according to the client's request.

Indication of pumps includes the following symbols::

28PV20.12

28	-	flow rate (l/s)
PV	-	submersible vertical pumps
20	-	nominal head for one stage (m)
12	-	number of stages

The basic parts of the pumps are made of the following materials:

Detail	Construction materials
	Standard
for pumps type 1PV12, 2PV11, 3PV12, 4PV12
Impeller	brass
Guiding apparatus, diffuser	plastic
Body parts	cast iron
Shaft	steel
for pumps type 4PV16, 11PV15, 11PV25, 16PV20, 28PV20, 28PV30, 55PV20
Impeller	cast iron
Guiding apparatus	cast iron
Shaft	steel
Indication of materials