Reservoir pressure maintenance systems with the application of piston or multistage centrifugal pumps.


Block-type centrifugal pumping plant for reservoir pressure maintenance system

The pumping station consists of 3 booster and 3 high pressure pumps, complete with electric motors with frequency converters, monitoring and control systems, necessary electrical equipment and valves. It is designed as a system of three container units. The completely installed container system with open side walls shall represent a large pump house. The control room, separated from the pump house by inside walls, is formed by 1 and 2 units assembly. The control room has a separate access.

Block-type centrifugal pumping station


a) Outer container unit 1 is meant for
the accommodation of 1 high pressure and 1 booster pumps and the partial accommodation of the electric equipment, frequency converters, power supply and pump control.
General description
The unit is designed as a standard container, modified and tested in compliance with the plant parameters according to DIN/ISO 1496 Part 1. Weight and classification is in accordance with DIN/ISO 668 Part 1 Type CCC. Container dimensions are approx. 12,0 x 3,0 x 3,0 m. (L x W x H outside dimensions), there is also an additional cover for ventilation within the container (height approx. 1 m). The container is for outdoor installation on the concrete foundation provided by the Customer.
Materials and construction:
Container exterior walls are made from profiled sheeting. The interior walls are made from smooth galvanized sheet metal hardened on the welded frame of steel section covered with industrial lacquer. The container flooring underlay is covered with plastic. The container bed is made from steel section with welded channel partitions with intervals according to the structural complexity. There is mineral wool between the exterior and interior walls (according to Euro-Klasse A1, DIN EN 13501-1).
Auxiliary equipment:
The door in the side wall as the entrance into the control room.
Container features:
The longitudinal side wall is open, steel section supports are provided for steady and distributed load.
b) Intermediate container unit 2 is meant for
the accommodation of 1 high pressure and 1 booster pumps and the partial accommodation of the electrical equipment, frequency converters, power supply and pump control.
General description, materials and construction:
Similar to the container unit 1.
Container features:
The both longitudinal side walls are open, steel section supports are provided for steady and distributed load.

c) Periphery container unit 3 is meant for
the accommodation of 1 high pressure pump and 1 booster pump as well as the accommodation of the distribution wire system and flow measurement.
General description, materials and construction:
Similar to the container unit 1.
Auxiliary equipment:
Four inlets for DN 125 pipe, and one inlet for DN 250 pipe.
Container features:
The longitudinal side wall is open, steel section supports are provided for steady and distributed load.

Notes:
  1. There is a manhole with a removable cover in each container top. It allows to remove the pump and the motor by means of a lifting device out of the modular container.
  2. The container is designed in the form of the ‘hood’, i.e. with no floor.
  3. There is a standard container two-winged door installed in each unit in the full container width. The door as well as the whole container is isolated with mineral wool.
  4. There is an axial fan regulated through a thermostat installed in each unit equipped with weatherproof ventilation inlets and outlets of necessary quantity.
  5. The scope of supply includes clamp bolts for connection of the units 1, 2, 3.
  6. The scope of supply includes anchor bolts (24 pcs) for mounting the units 1, 2, 3 on the Customer’s foundation.
  7. All the units are prepared for connection with each other.
Medium characteristics:
Medium: potable water
Temperature: +1…+120°Ñ
Density: 1000 kg/m3
pH-value: 6…9
Solids content: 0.1 g/l
Ambient temperature: +5…+40°Ñ

High pressure pump
Technical data:
Type: horizontal centrifugal multistage
Flow rate: 83 m3/h
Suction pressure: 1…3 atm.
Head: 1590 m
Speed: 3336 rpm
Power: 553 kW
NPSH: 3.48 m
Impeller diameter: 265 mm
Seal: single mechanical
Flanges:
Type: Â1 acc. to DIN2501
Suction : DN150 PN16
Discharge: DN80 PN250
Materials:
Suction casing: 1.0619
Discharge casing: 1.0553
Impeller: 1.4317
Shaft: 1.4021
Bearing body: 0.7040
Shaft sleeve: 1.4571
Thermosyphon system for seal:
Thermosyphon system acc. to API 610/682 Plan 51, consists of:
 - Thermosyphon tank.
 - Level switch (min./max.), explosion proof acc. to ATEX II 1/2G EEx ia IIC T3-T6.
 - Thermometer gage for visible indication.
Electric motor:
Power supply: 380 V / 50 Hz
Power: 669 kW
Speed: 2988 rpm
Ex-protection: EEx de IIÂ Ò4
Ingress protection: IP55
Isolation class: F, up to Â
Electric motor is meant for operating conditions with the ambient temperature +5…+50°Ñ. It is completed with three ÐÒ-100 temperature detectors for winding temperature control and one ÐÒ-100 temperature detector for bearing temperature control. The ÐÒ-100 temperature detectors are without the signal adapter.
Bearings:
Bearing lubrication is effected by means of a constant level oiler with oil temperature control effected by 2 ÐÒ-100 temperature detectors.
Scope of supply:
 1.The pump complete with the electric motor and the frequency converter.
 2.Thermosyphon system for seal.
 3.Coupling guard, non-sparking.
 4.Base-plate with anchor bolts and spacer washers.

Pump performance curve:
Pump performance curve


Booster pump
Technical data:
Type: horizontal centrifugal single-stage
Flow rate: 83 m3/h
Suction pressure: 0.3…1 atm
Head: 29 m
Speed: 1357 rpm
Power: 10,11 kW
NPSH: 0.96 m
Impeller diameter: 329 mm
Seal: mechanical single
Flanges:
Type: Â1 acc. to DIN2501
Suction: DN125 PN16
Discharge: DN80 PN16
Materials:
Casing: 0.6025
Casing cover: 0.6025
Impeller: 1.4317
Shaft: 1.4057
Bearing body: 0.6025
Thermosyphon system for seal
Thermosyphon system acc. to API 610/682 Plan 51, consists of:
 - Thermosyphon tank.
 - Level switch (min./max.), Ex-protection acc. to ATEX II 1/2G Eex ia IIC T3-T6.
 - Thermometer for visible indication.
Electric motor:
Supply: 380 V / 50 Hz
Power: 15 kW
Speed: 1467 rpm
Ex-protection: EEx de IIÑ Ò4
Protection: IP55
Isolation class: F, up to Â
Electric motor is meant for operating conditions with the ambient temperature +5…+50°Ñ. It is completed with three ÐÒ-100 temperature detectors for winding temperature control and one ÐÒ-100 temperature detector for bearing temperature control. The ÐÒ-100 temperature detectors are without the signal adapter.
Bearings:
Bearing lubrication is effected by means of a constant level oiler.
Scope of supply:
 1.The pump complete with the electric motor and the frequency converter.
 2.Thermosyphon system.
 3.Coupling guard, non-sparking.
 4.Base-plate with anchor bolts and spacer washers.

Pump performance curve:
Pump performance curve


Pump valves and winding
Valves:

On suction of each booster pump there is:
  • 1 pc. Stop valve DN 200 PN16
  • 1 pc. Stop valve DN 150 PN16
Between each booster and high pressure pump there is:
  • 1 pc. Air bleed valve DN 25 PN16
On discharge of each high pressure pump there is:
  • 1 pc. Return valve DN 125 PN250
  • 1 pc. Stop valve with automatic actuator DN 125 PN250
  • 1 pc. Air bleed valve DN 25 PN250
On each distribution line there are:
  • 2 pcs. Stop valve DN 125 PN250
  • 1 pc. Bleed valve DN 25 PN250
  • 4 pcs. Turbine flowmeter DN 65 PN250.
Description:
  • located on discharge in each of 4 bends of the distribution centre.
  • operating range from 6 to 83 m3/h.
  • measurement error +/- 0,8%.
  • local digital indication (in a LCD-display).
  • pulse output.
  • analog output: 4-20 mÀ.
Materials
Winding, flanges, fittings: 1.4571
Valves: 1.4571 or analog
Pipe brackets: V2A
Pipe supports: RSt 37
Screws: V4A
Nuts and U-washers: V2A

Distribution centre with counter flanges (outside container)
Suction: 1õ DN250 PN16
Discharge: 4õ DN125 PN250

Notes:
  • Winding for the pump and valves connection is performed at the manufacturer’s plant and is supplied by separate pipe segments.
  • The necessary seals, bolts, nuts, washers and pipe supports are manufactured and supplied as an assembly.
Electrical equipment
Scope of supply includes:
 1.One common control system for 3 booster and 3 high pressure pumps.
 2.One sensor monitoring and control device for each pump.
 3.One common distribution block for electrical equipment and container in-built elements for the offered 1, 2, 3 container units configuration.

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