Public Procurement of Goods — Equipment by Placement and Integration of the Equipment for Reconstruction of Pump Station for Well B1 and B3 and Reconstruction of Repump Station Murgashevo for the Water Supply System of the Municipality of Demir Hisar

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Deadline and place of delivery:

The holder of the procurement shall be obliged to perform the procurement with placement and integration within 6 (six) calendar months.

The procurement shall be performed successively in accordance with the adopted dynamics for the procurement with placement and integration, approved by the Purchaser.

The deadline for delivery of the goods shall start as of the day of commissioning of the holder of the procurement.

Each bid that contains a delivery deadline different than the 1 referred to in this item shall be considered as unacceptable and as such it shall be rejected by the Public Procurement Commission.

Advance payment:

7.4.1. For the purpose of performing the contract on public procurement, an advance payment in the amount of 20 % of the contract value, VAT included, shall be allowed.

Prior to the payment of the advance, the holder of the procurement shall be obliged to submit a bank guarantee in the amount of the agreed advance payment within 5 working days as of the day of signing of the Contract with validity period as of the day of payment of the 1

II) Technical Specifications:

1. Pumps Well 1: Vertical well pump, length of installation L = 10 m, with included suction filter:

— Q = 1 300-2 220 lit/min;

— H = 42-22 mVs;

— Power of installed electric motor not exceeding 15 kW;

— The consumption in the work point not exceeding 12,5 kW;

— Pump performance higher than 75 %;

— NPSH mаx. 5 m.

Material:

— Body: Gray iron;

— Work circuits: Gray iron;

— Suction filter: galvanized steel.

Electric motor:

— 400 V ± 5 %, 50 Hz,

— Protection: Protection from dust and water under all angles IP 55 or equivalent;

— The maximal weight of the pump aggregate must not exceed 300 kg.

Well 3:

Vertical well pump, length of installation L = 9 m, with included suction filter:

— Q = 1 300-2 220 lit/min;

— H = 42-22 mVs;

— Power of installed electric motor not exceeding 15 kW;

— The consumption in the work point not exceeding 12,5 kW;

— Pump performance higher than 75 %;

— NPSH mаx. 5 m.

Material:

— Body: Gray iron;

— Work circuits: Gray iron;

— Suction filter: galvanized steel.

Electric motor:

— 400 V ± 5 %, 50 Hz;

— Protection: Protection from dust and water under all angles IP 55 or equivalent;

— The maximal weight of the pump aggregate must not exceed 300 kg.

Repumping station:

Vertical well pumps, length of installation L = 9 m, with included suction filter:

— 1 pump operation:

Q = 1 200-1 800 lit/min;

H = 108-52 mVs.

— Parallel operation of 2 pumps:

Q = 2 100-3 600 lit/min;

H = 114-55 mVs.

— Power of installed electric motor not exceeding 30 kW;

— The consumption in the work point not exceeding 27 kW;

— Pump performance higher than 75 %;

— NPSH mаx. 4 m.

Material:

— Body: Gray iron;

— Work circuits: Gray iron;

— Suction filter: galvanized steel.

Electric motor:

— 400 V ± 5 %, 50 Hz;

— Protection: Protection from dust and water under all angles IP 55 or equivalent;

— The maximal weight of the pump aggregate must not exceed 465 kg.

During parallel operation of 2 pumps, the features must be as follows:

— Q min = 2 280 l/min;

— H min = 112 m.

2. Electrical Controlling Rack:

Controller of automatic regulation of the power factor (cos φ controlller).

The controller is to have high-level of safety, easy parameterization and safe output operation. Parameter setting option: capacitance coefficient, presentation of current, voltage, capacitance, etc.

— The change of the parameters is to be done via keyboard on the device.

— They must have a signalling light that shows which parameter is displayed on the screen and which outputs are in function.

— The display must have 3 digits.

— There must be an operation mode selection: manual or automatic.

Technical characteristics:

— Operating voltage: 230/400 V;

— Operating frequency: 45-65 Hz;

— Insulation voltage: max. 690 V;

— Measuring range: 0 to 50 kVAp.

Measurement errors:

— Voltage: ± 1,0 %;

— Current: ± 1,0 %;

— Capacitance coefficient: ± 1,0 %;

— Reactive energy: ± 2,0 %;

— Working temperature: - 10- + 55 °Ц;

— Humidity: 30-60 %;

— Display: min. 3 digits.

Condenser batteries for correction of the power factor.

— They are to be made in a cylindrical body with metal-propylene foil that does not need special impregnation, filled with special resin.

— The condenser battery is to be constructed in such a manner that in case of damaging (over voltage, current or temperature) the connection is interrupted on the upper lid where the power supply is connected. It must be made via a specially constructed valve installed immediately above the capacitance element.

— The bodies of the 3 phase condensers contain integrated resistors for their discharge.

— The condenser battery can be used for both passive and active compensation.

Technical characteristics:

— Operating voltage: 440 V; 50 Hz;

— Insulation voltage: max. 690 V;

— Protection against over voltage: max. 6 kV/minute;

— Capacity max. 8 kVAr at 440 V;

— Tolerance: ± 5 %;

— Working temperature: -40 °C- + 55 °C;

— Losses: max. 0,5 W/kVAr;

— Integrated discharge resistance.

3. Soft Starter:

— I mаx. 35 А, 83 А (for 30 kW);

— Operating voltage from 208 to 690 V AC;

— Control of the initial moment;

— Number of relay outputs 250 VA C-5 А — 3 pcs;

— Analogue output 0-10 V, 0-20 mA, 4-20 mA programmable upon a choice Iamp, U volt, PkW, QkVar, cos φ.

Protection:

— Electronic protection against overload;

— Double protection (1 during the start and 1 during the operation) against overload;

— Input for the RTS engine temperature probe;

— Protection against stuck rotor;

— Protection against underload;

— Protection against asymmetry or phase failure;

— Protection against very high current (8 х I e);

— Warnings;

— High current;

— Low current;

— Overload;

— Overheating of thyristors;

— Initial voltage — programmable from 30 % to 70 %, initial time from 1,30 sec;

— Turn off voltage — programmable from 30 % to 70 %, initial time of shutting off 0,30 sec.

4. Flange Fittings made of Ductile Iron:

The flange fittings must be certified for drinking water, made of ductile iron, in accordance with EN 545 or an equivalent, internally and externally the fittings must be coated with epoxy protective coat.

The manufacturer must have the following certificates:

— GSK certificates or an equivalent;

— DVGW certificates or an equivalent.

The flange fittings must be in accordance with the following standards:

— Specification and test methods: EN 545:ISO 2531 or an equivalent;

— The flanges must be made in accordance with: EN 1092-2 or an equivalent.

5. Closing Valves (Flat/Oval):

The closing valves must be in accordance with EN1074 (1-2) or an equivalent; ISO 7259 or an equivalent, the distance between the flanges must be in accordance with ISO 5752 or an equivalent, short version EN 558-1 (F4) — series F14 or an equivalent, long version EN 558-1 (F5) — series F15 or an equivalent, the flange dimensions and drilling must be in accordance with EN 1092-2 or an equivalent, hydraulic test must be in accordance with EN 12266 or an equivalent; ISO 5208 or an equivalent, body and lid made of ductile iron GJS 400-15 (GGG40) or an equivalent, internally and externally coated with epoxy protection min. 250 microns — the manufacturer must own a GSK certificate for quality or an equivalent, cap made of ductile iron protected with vulcanized EPDM with integrated sliders decrease of friction, axis made of stainless steel (minimal quality degree 1.4021, i.e. 13 % cold rolled chrome), spindle sealed with a multiple O-ring system (min. 2) and a seal at the top of the spindle. Self-closing lid connection, without screws. Maintenance-free. Including stainless steel screws, nuts, washers and gaskets for flanges made of NBR. Hand valve wheel must be made of ductile iron, with anti-corrosive protective coating made of epoxy dust or an equivalent, with a washer, screw and nut made of stainless steel.

6. Installation — Dismantling Element:

Installation — dismantling element must contain 3 flanges in accordance with ISO 7005, EN1092 or an equivalent. The body must be made of stainless steel, EPDM seal, internal and external epoxy protection min. 250 — the manufacturer must own a GSK certificate for quality or an equivalent, including stainless steel screws, nuts, washers and seals approved for drinking water.

7. Electromagnetic Flow Meter:

— Octagonal section of the sensor that enables installation of other elements right next to the meter, without affecting the accuracy of the measurement;

— The sensor must contain memory that stores the data from the transmitter;

— Nominal pressure: PN10 (Optional PN16);

— Flow meter connection: flange;

— Protection of the sensor and the cable (protection from complete submersion during the installation in the manhole) IP 68 or an equivalent;

— Internal coating of the sensor: Hard rubber intended for drinking water;

— Accuracy of the measurement: 0,4 %, optional 0,2 %;

— Display: 2 line LCD display;

— Transmitter protection: Protection against dust and water under all angles;

— IP 65 or an equivalent;

— External power supply of the transmitter: 220 VAC/50 Hz;

— 2 way measurement;

— Temperature: - 200 °С to + 600 °С;

— Output signals (outputs);

— Current output 4-20 mА;

— 2 separate output impulses;

— 2 programmable alarm outputs;

— HART protocol;

— Communication with a computer via IR (infra red) connection for parameterization of the flow meter.

8. Check Valve:

The check valve must be in accordance with the following standards:

— Integrated length: ISO 5752 series 48 or an equivalent; EN 558-1 series 48 or an equivalent;

— The flanges must be made in accordance with EN 1092-2 (ISO 7005-2) or an equivalent;

— Hydraulic test in accordance with EN 1074-3 or an equivalent;

The check valve must be made of:

— Body and lid made of ductile iron GJS 400-15 (GGG40);

— Disc made of ductile iron GJS 400-15 (GGG40) protected with vulcanized EPDM;

— Axis made of stainless steel;

— Brass saddle;

— Internal and external epoxy protection min. 250 microns;

— The manufacturer must own a GSK certificate for quality or an equivalent.

9. PLC Device for the Repumping Station:

PLC for measurement, management and protection of motors and pumps, as well as Radio communication controlled by a SCADA main computer.

10. Manhole Cover:

Group 4 (Class D 400) in accordance with EN124 standard or an equivalent: Roads (including pedestrian zones), barriers and parking zones for all types of traffic vehicles. Normal traffic and occasional checks.

Features:

— Automatic lock with a protector made of cast iron and a spring;

— Cover with hinge, can be opened min. 130 °, blocked at 90° during closing;

— Alterable cover with ventilation version;

— Optimized fitting frame;

— Option cover with an anti-theft protector (disables the 90° blocking function);

— Option locking system.