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Three-screw pumps 3V, 3V*2

  • Series description
  • Technical characteristics
  • Downloads
  • Related content
3V, 3V*2
  • Three-screw
  • Metallurgy, mining
  • Midstream
  • Downstream and petrochemistry
  • Highly viscous
  • rock-oil
  • masut
  • oil
  • diesel fuel

Function

Three-screw pump of 3V type and electric pump units on its base are intended for pumping nonaggressive liquids without abrasive admixtures possessing lubricating power, with kinematic visсosity 0,1*10-4 up to 7,5*10-4 m2/s (from 1,9 up to 1000 E) and at a temperature of up to 353 К (80°С).

Lower limit of viscosity is restricted by lubricating power of the pumped liquid. When pumping liquids being analogous to diesel fuel, the outlet pressure is to be reduced up to 0,5 МPа (5,0 kgf/сm2). The upper limit of viscosity is restricted by rotational speed and driving power.

By agreement with the Manufacturing plant it is admitted to use pumps for pumping liquids with temperature of up to 373 К (100°С).

It is necessary to inquire about tolerable pump pressure at the Manufacturer in every specific case when liquids different from petroleum products (oils, diesel fuel) on their physical-mechanical properties are pumped.

Pump is related to items of general purpose (ION) aspect 1 (repairable ones) GOST 27.003-90. Climatic version U, in-service location category 3, and also, climatic version Т, in-service location category 2 as per GOST 15150-69.


Design

Electric pump unit consists of three-screw pump and electric motor, which are mounted on common frame and connected by coupling, protected with housing.

As to the operating principle the three-screw pump – is a positive displacement machine.

Pump consists of the following main components: casing with covers, shell, one driving and two driven screws and end-face seal.

The shell is inserted inside the casing with three adjacent cylindrical bores, in which the driving screw and two driven screws are placed. The driven screws are intended for sealing the driving screw.

The screw thread profile is a special one ensuring their mutual conjugation, the thread is a double–start one, the driving screw is provided with counterclockwise thread, the thread of the driven screws is a clockwise one.

During rotation of screws a vacuum is created in the pump suction chamber, as a result the pumped liquid flows under the action of atmospheric pressure to the screw thread depressions mutually closed during rotation of the screws. The liquid volume closed in the screw thread moves in the shell rectilinearly without mixing and then it is forced into the discharge chamber.

The direction of the inlet and outlet of the liquids being pumped is indicated in the drawings by arrows.

Type of shaft sealing – end-face sealing (single or double).


Application

  • in fuel feed systems (mazut, diesel fuel) in boiler installations, heat supply facilities
  • as pumps of high pressure (for pumping of of mineral oils) in hydraulic systems
  • in technological and transport systems of oil refining enterprises
  • pumping/transfer of oil products by sea transport and railway terminals
  • providing technological and auxiliary processes connected with pumping of oil products at the enterprises of metallurgy, ore-dressing branch and the petrochemistry enterprises

Design features and benefits

  • simple design, good maintainability
  • equalized liquid flow without pulsation and mixing and able to save its structure
  • horizontal and vertical installation
  • single mechanical seals, double mechanical seals are optional (at request)
  • bearings are isolated from pumped liquid to increase operational life of pump
  • good suction capacity = up to 5 m and more, depending on viscosity of pumped liquid

Technical parameters

Pump models Flow, m³/h, least Rotation speed, rpm Rotation speed, c˜¹ Pump inlet pressure, kgf/sm², max Pump outlet pressure, kgf/sm², max Full overflow pressure, MPa Pump efficiency,% Voltage, V Frequency, Hz Type of current Kinematic viscosity of pumped liquid (calculated), ° VU Allowable vacuum suction, m
A1 3V 4/25 6.84 2900 48 2.5 25 77 220/380 50 AC 6
A1 3V 4/25-3/25B 3 1450 24 2.5 25 58 220/380 50 AC 6
A1 3V 4/25-3/25B-1 3 1450 24 2.5 25 58 220/380 50 AC 6
A1 3V 4/25-3,2/4B-1 3.2 2900 48 2.5 4 50 220/380 50 AC 6
A1 3V 4/25-3,2/4B-2 3.2 2900 48 2.5 4 50 220/380 50 AC 6
A1 3V 4/25-6,8/25B-1 6.84 2900 48 2.5 25 66 220/380 50 AC 6
A1 3V 8/100-11/100B-1 11.52 2900 48 100 12 80 380 50 AC 5
A1 3V 4/25-6,8/25B-2 6.84 2900 48 2.5 25 66 220/380 50 AC 6
A1 3V 8/100 11.52 2900 48 100 12 80 380 50 AC 5
A1 3V 4/160 5.8 2900 48 160 19.2 76 380 50 AC 10 6
A1 3V 4/160-4/100B 5.8 2900 48 100 12.5 77 380 50 AC 10 5
A1 3V 4/160-4/63B 5.8 2900 48 63 7.9 78 380 50 AC 10 5
A1 3V 16/25 21.6 2900 48 25 77 220/380 50 AC 10 5
A1 3V 16/25-8/25B-2 8 1450 24 25 56.5 220/380 50 AC 10 5
A1 3V 16/25-8/25B-3 8 1450 24 25 56.5 220/380 50 AC 10 5
A1 3V 16/25-10/6,3B-2 10 2900 48 6.3 71 220/380 50 AC 10 5
A1 3V 16/25-10/6,3B-3 10 1450 24 6.3 58 220/380 50 AC 10 5
A1 3V 16/25-20/6,3B-2 21.6 2900 48 6.3 56 220/380 50 AC 10 5
A1 3V 16/25-20/6,3B-3 21.6 2900 48 6.3 56 220/380 50 AC 10 5
A1 3V 16/25-20/6,3B-4 21.6 2900 48 6.3 56 220/380 50 AC 10 5
A1 3V 16/25-20/25B-2 21.6 2900 48 25 71 220/380 50 AC 10 5
A1 3V 16/25-20/25B-3 21.6 2900 48 25 71 220/380 50 AC 10 5
A1 3V 63/40 46.8 1450 24 40 79 380 50 AC 10 5
A1 3V 63/40-45/40B 46.8 1450 24 40 79 380 50 AC 10 5
A1 3V 125/25-58/10B-1 58 980 16 10 50 220/380 50 AC 10 5
A1 3V 125/25-90/6,3B 90 1450 24 6.3 45 220/380 50 AC 10 5
A1 3V 125/25-90/6,3B-1 90 1450 24 6.3 45 220/380 50 AC 10 5
A1 3V 125/25-90/25B 90 1450 24 25 78 220/380 50 AC 10 5
A1 3V 125/25-90/25B-1 90 1450 24 25 78 220/380 50 AC 10 5
A2 3V 63/25 46.8 1450 24 25 79 220/380 50 AC 10 5
A2 3V 63/25-45/6,3B-1 46.8 1450 24 6 63.3 220/380 50 AC 10 5
A2 3V 63/25-45/6,3B-2 46.8 1450 24 6 63.3 220/380 50 AC 10 5
A2 3V 63/25-45/25B-1 46.8 1450 24 25 72.5 220/380 50 AC 10 5
A2 3V 63/25-45/25B-2 46.8 1450 24 25 72.5 220/380 50 AC 10 5
A2 3V 40/25 32.4 1450 24 25 77 220/380 50 AC 10 5
A2 3V 40/25-35/6,3B-3 35 1450 24 6.3 52 220/380 50 AC 10 5
A2 3V 40/25-35/6,3B-4 35 1450 24 6.3 52 220/380 50 AC 10 5
A2 3V 40/25-35/10B 35 1450 24 10 52 220/380 50 AC 10 5
A2 3V 40/25-30/25B-3 32.4 1450 24 25 68.5 220/380 50 AC 10 5
A2 3V 40/25-30/25B-4 32.4 1450 24 25 68.5 220/380 50 AC 10 5
A2 3V 125/16 90 1450 24 2.5 16 78 220/380 50 AC 5
A2 3V 125/16-50/6,3B 50 1000 16 2.5 6.3 58.4 380/660 50 AC 5
A2 3V 125/16-58/10B 58 1000 16 2.5 10 58.4 220/380 50 AC 5
A2 3V 125/16-90/6,3B-2 90 1450 24 2.5 6.3 64.8 220/380 50 AC 5
A2 3V 125/16-90/16B-2 90 1450 24 2.5 16 72.8 220/380 50 AC 5
A2 3V 125/16-90/6,3B-3 90 1450 24 2.5 6.3 64.8 220/380 50 AC 5
A2 3V 125/16-90/16B-4 90 1450 24 2.5 16 72 220/380 50 AC 5
A2 3V 125/16-90/6,3B-4 90 1450 24 2.5 6.3 64.8 220/380 50 AC 5
A3 3V 8/63 11.52 2900 48 63 77 380 50 AC 10 5
A3 3V 8/63-11/63B 11.52 2900 48 63 77 380 50 AC 10 5
A3 3V 8/63-11/63B-1 11.52 2900 48 63 77 380 50 AC 10 5
A3 3V 320/25 125 1450 24 25 55 380 50 AC 10 5
A3 3V 320/25-125/4B 125 1450 24 4 55 380 50 AC 10 5
A3 3V 320/25-125/4B-1 125 1450 24 4 55 380 50 AC 10 5
A3 3V 320/25-125/4B-3 125 1450 24 4 55 380 50 AC 10 5
A3 3V 320/25-125/10B 125 1450 24 10 70 380 50 AC 10 5
A3 3V 320/25-125/10B-1 125 1450 24 10 70 380 50 AC 10 5
A3 3V 320/25-125/10B-3 125 1450 24 10 70 380 50 DC 10 5
A3 3V 320/25-125/10B-5 125 1450 24 10 70 380 50 AC 10 5
A3 3V 320/25-125/25B 125 1450 24 25 73 380 50 AC 10 5
A3 3V 320/25-125/25B-1 125 1450 24 25 73 380 50 AC 10 5
A3 3Vx2 320/16-250/4B 252 1450 24 2 4 53 220/380 50 AC 10 5
A3 3Vx2 320/16-250/10B 252 1450 24 2 10 63 220/380 50 AC 10 5
A3 3Vx2 400/16-320/4B 324 1450 24 2 4 58 220/380 50 AC 10 5
A3 3Vx2 400/16-320/10B 324 1450 24 2 10 67 220/380 50 AC 10 5
A3 3Vx2 500/10-400/4B 400 1450 24 2 4 62 220/380 50 AC 10 5
A3 3Vx2 500/10-400/10B 400 1450 24 2 10 74 220/380 50 AC 10 5
A4 3V 1,6/40 3.24 2900 48 40 72 220/380 50 AC 10 6.5
A4 3V 1,6/40-3/25B 3.24 2900 48 25 72 220/380 50 AC 10 6.5
A4 3V 1,6/40-3/25B-1 3.24 2900 48 25 72 220/380 50 AC 10 6.5
A4 3V 4/25 6.84 2900 48 25 77 220/380 50 AC 10 6.5
A4 3V 4/25-3/25B 3.24 1450 24 25 77 220/380 50 AC 10 6.5
A5 3V 1,6/40 3.24 2900 48 40 72 220/380 50 AC 10 6.5
A5 3V 1,6/40-3/40B 3.24 2900 48 40 72 220/380 50 AC 10 6.5
A5 3V 1,6/40-3/40B-1 3.24 2900 48 40 72 220/380 50 AC 10 6.5
A5 3V 4/25 6.84 2900 48 25 77 220/380 50 AC 10 6.5
A5 3V 4/25-6,8/40B 6.84 2900 48 40 77 220/380 50 AC 10 6
A5 3V 8/25 11.5 2900 48 2 25 68 220/380 50 AC 10 5
A5 3V 8/25-5/4B 5.5 1450 24 2 4 65 220/380 50 AC 10 5
A5 3V 8/25-5/4B-1 5.5 1450 24 2 4 65 220/380 50 AC 10 5
A5 3V 8/25-11,5/10B 11.5 2900 48 2 10 73 220/380 50 AC 10 5
A5 3V 8/25-11,5/10B-1 11.5 2900 48 2 10 73 220/380 50 AC 10 5
A5 3V 8/25-11,5/25B 11.5 2900 48 2 25 73 220/380 50 AC 10 5
A5 3V 8/25-11,5/25B-1 11.5 2900 48 2 25 73 220/380 50 AC 10 5
A5 3V 40/25 32.4 1450 24 25 77 380 50 AC 10 5
A5 3V 40/25-35/6,3B-3 35 1450 24 6.3 52 380 50 AC 10 5
A5 3V 40/25-35/6,3B-4 35 1450 24 6.3 52 380 50 AC 10 5
A5 3V 40/25-35/10B 35 1450 24 10 52 380 50 AC 10 5
A5 3V 40/25-35/10B-1 35 1450 24 10 52 380 50 AC 10 5
A5 3V 40/25-30/25B-3 32.4 1450 24 25 77 380 50 AC 10 5
A5 3V 40/25-30/25B-4 32.4 1450 24 25 77 380 50 AC 10 5

Pump type key

For example А1 3В 125/25-90/6,3B-1 U3, TU 26-06-1546-89, where:

  • А – design code of the pump
  • 3V 125/25 – designation of pump standard size as per GOST 20883-88
  • 90 – rounded-off capacity of the pump when coupled with motor, m²/h
  • 6,3 – outlet pressure of the pump when coupled with motor, kgf/сm²
  • B – flow passage material designation – bronze in this case
  • 1 – modification of the unit depending on the type of the drive used
  • U – climatic version
  • 3 – in-service location category