Pedrollo 4-BLOCK 4" Close-coupled Electric Submersible Pumps

Product Overview

The Pedrollo 4-BLOCK is a series of 4-inch close-coupled electric submersible pumps designed for drawing water from clean wells, even those containing sand (up to 200 g/m³). These pumps are engineered for high efficiency, reliability, and ease of installation, making them suitable for a wide range of domestic, commercial, and agricultural applications. They are ideal for automatic water distribution systems, pressure tanks, and irrigation.

Key Features:

Ready-to-install stainless steel submersible pump.
Integrated capacitor and thermal protector.
Patented hydraulics with fully independent, floating impellers to minimize sand impact on performance.
High efficiency, meeting or exceeding ErP requirements (MEI ≥ 0.40).
Outstanding performance.
Supplied with a standard 20-meter power cable.

Intended Use:

Clean water applications ?
Domestic use ?
Civil use ?️
Agricultural use ?

Performance Range

The 4-BLOCK pumps offer a performance range of up to 200 liters per minute (12 m³/h) and a maximum head of 140 meters.

The performance curves illustrate the relationship between head (in meters) and flow rate (in liters per minute or cubic meters per hour) for various 4-BLOCK pump models. Each curve represents a specific model, showing its operating range and efficiency points (η), with MEI values indicating high efficiency.

Installation and Use

Designed to draw water from clean wells, even in the presence of sand (up to 200 g/m³). With their high efficiency, reliability, and ease of installation, they are highly recommended for domestic, commercial, and agricultural applications. They are ideal for automatic water distribution alongside pressure tanks, irrigation systems, and more.

Application Limits

Liquid temperature: up to +35 °C
Maximum sand content: 200 g/m³
Maximum operating depth: up to 100 meters below water level (with an appropriately sized power cable)
Operation: Vertical and horizontal
Starts per hour: 20 at regular intervals

Available Upon Request

30-meter long power cable
Different voltage requirements
60 Hz frequency

Materials and Components

A cross-section diagram of the 4-BLOCK pump identifies key components by number. These include the delivery port and pump jacket, pump bearing, impellers, diffusers, stadium boxes, pump shaft, cable sheath, filter, coupling motor bracket, motor shaft, motor sleeve, mechanical seal, capacitor, electric motor, compensating diaphragm, and power cord.

No.	Component	Material
1	Delivery port and pump jacket	Stainless steel AISI 304 with thread according to ISO 228/1
2	Pump bearing	EPDM
3	Impellers	Delrin®
4	Diffusers	Noryl™
5	Stadium boxes	Stainless steel AISI 304
6	Pump shaft	Stainless steel AISI 304
7	Cable sheath	Stainless steel AISI 304
8	Filter	Stainless steel AISI 304
9	Coupling motor bracket	Technopolymer and brass
10	Motor shaft	Stainless steel AISI 431
11	Motor sleeve	Stainless steel AISI 304
12	Mechanical seal	Seal: ST4-16, Shaft: Ø 16 mm, Materials: Ceramic / Graphite / NBR
13	Capacitor	(Integrated into Electric Motor)
14	Electric motor	Specially dimensioned submersible rewindable oil filled motor, suitable for continuous service (non-toxic food-safe oil). Single-phase 220-230 V - 50 Hz. Built-in motor capacitor. Thermal motor protection incorporated in the winding. Continuous running duty S1. Insulation: Class F. Protection rating: IP X8.
15	Compensating diaphragm	(Part of motor assembly)
16	Power cord	DRINCABLE® HRC certified for use with drinking water. Standard length 20 metres.

Performance Data Tables

The following tables provide detailed performance data for the 4-BLOCK pump series, including flow rate, head, power, and efficiency for various models.

4-BLOCK 2 Series

TYPE	POWER (P2)		m³/h	Q l/min							H metres
TYPE	kW	HP	m³/h	0	10	20	30	40	50	60	H metres
4-BLOCKm 2/7	0.37	0.50	54.5	52.5	49	44.5	38.5	30.5	21
4-BLOCKm 2/10	0.55	0.75	78	75	70	63.5	55	44	29.5
4-BLOCKm 2/13	0.75	1	101	97	91	83	71	57	38.5
4-BLOCKm 2/18	1.1	1.5	140	135	126	114	99	79	53.5

4-BLOCK 4 Series

TYPE	POWER (P2)		m³/h	Q l/min						H metres
TYPE	kW	HP	m³/h	0	25	40	60	75	100	H metres
4-BLOCKm 4/5	0.37	0.50	39.5	37.5	36.5	34.5	30	24.8	12.5
4-BLOCKm 4/7	0.55	0.75	55	52	51.5	48	41.5	34.5	17.5
4-BLOCKm 4/9	0.75	1	71	67	66	62	53.5	44.5	22.5
4-BLOCKm 4/13	1.1	1.5	102	97	95	89	77	64.5	32.5

4-BLOCK 6 Series

TYPE	POWER (P2)		m³/h	Q l/min								H metres
TYPE	kW	HP	m³/h	0	25	40	60	75	100	125	150	H metres
4-BLOCKm 6/3	0.37	0.50	19.5	19	18.4	17.4	16.4	14	10.6	6
4-BLOCKm 6/5	0.55	0.75	32.5	31.5	30.5	29	27.5	23.3	17.7	10
4-BLOCKm 6/7	0.75	1	45.5	44	43	40.5	38	32.5	24.8	14.5
4-BLOCKm 6/10	1.1	1.5	65	63	61.5	58	54.5	46.5	35.5	20.5

4-BLOCK 8 Series

TYPE	POWER (P2)		m³/h	Q l/min									H metres
TYPE	kW	HP	m³/h	0	40	60	75	100	125	150	175	200	H metres
4-BLOCKm 8/3	0.55	0.75	21	20	19.4	18.7	17.1	14.9	12.1	8.6	4
4-BLOCKm 8/5	0.75	1	35	33.5	32.5	31	28.5	24.8	20.2	14.3	7
4-BLOCKm 8/8	1.1	1.5	56	53.5	51.5	50	45.5	39.5	32.5	22.9	11.5

Performance curves comply with EN ISO 9906 Grade 3B tolerance limits.

Dimensions and Weight

TYPE	PORT		DIMENSIONS mm		kg
TYPE	DN	NO. STAGES	Ø	h	kg
4-BLOCKm 2/7	7		617	11.4
4-BLOCKm 2/10	10		677	12.3
4-BLOCKm 2/13	13		757	13.9
4-BLOCKm 2/18	18		907	17.0
4-BLOCKm 4/5	5		602	11.5
4-BLOCKm 4/7	7		652	12.1
4-BLOCKm 4/9	9		722	13.3
4-BLOCKm 4/13	13	11/4"	100	872	16.4
4-BLOCKm 6/3	3		572	11.4
4-BLOCKm 6/5	5		635	12.0
4-BLOCKm 6/7	7		718	13.2
4-BLOCKm 6/10	10		862	16.4
4-BLOCKm 8/3	3		572	12.0
4-BLOCKm 8/5	5		655	12.6
4-BLOCKm 8/8	8		799	15.8

Absorption

TYPE	VOLTAGE	A
Single-phase	230 V
4-BLOCKm - 0.37 kW		3.5 A
4-BLOCKm - 0.55 kW		4.4 A
4-BLOCKm - 0.75 kW		6.1 A
4-BLOCKm - 1.1 kW		8.0 A

Pallet Capacity

TYPE	NO. OF PUMPS
Single-phase
4-BLOCKm 2	55
4-BLOCKm 4	55
4-BLOCKm 6	55
4-BLOCKm 8	55

Typical Installation

The typical installation diagram shows the submersible pump positioned vertically within a well. It illustrates the pump's connection to the discharge pipe, the water levels (static and dynamic), and the coupling for a safety cable.

Patents, Trademarks, and Certifications

European Patents: EP3123031, EP2419642
Patent: 102021000030575
4-BLOCK® is a registered trademark No. 018702380
Certifications: ECO FRIENDLY, RoHS2 COMPLIANT, REACH COMPLIANT, EMC COMPLIANT

For more information, visit www.pedrollo.com.

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