Description

CQX(W) Seres deep-well limber pump

一.General

The pump is basically applicable to marine emergency survival system, and

removal of accumulated water in the cabin. It is widely used to let sullage, liquid waste, city life sullage, which with some solid and fibre in town planning、pumping station、architecture and so on. Similarly, it is used to firedamp、irrigation in country.

The motor’s insulated grade is F, crust grade is IPX8.

二.Main technical performance parameters

Serial Number	model	flow m3/h	扬程 m	efficiency %	power kW	rotational speed r/min	Voltage V	Current A	caliber Φmm	Through particles Φmm
1	CQX（W）10-10-1	10	10	44	1	2900	380	3.2	50	25
2	CQX（W）15-7-1	15	7	47
3	CQX（W）10-15-1.5	10	15	44	1.5			4.3
4	CQX（W）15-10-1.5	15	10	47
5	CQX（W）25-8-1.5	25	8	51
6	CQX（W）15-20-2.2	15	20	47	2.2			4.9	65	40
7	CQX（W）25-14-2.2	25	14	50
8	CQX（W）40-10-2.2	40	10	54
9	CQX（W）20-22-3	20	22	49	3			6.4
10	CQX（W）30-16-3	16	16	52
11	CQX（W）40-12-3	40	12	54
12	CQX（W）20-25-4	20	25	49	4			8.2
13	CQX（W）30-18-4	30	18	52
14	CQX（W）40-15-4	40	15	54
15	CQX（W）60-13-4	60	13	57
16	CQX（W）25-30-5.5	25	30	52	5.5	1470		12	50	25
17	CQX（W）30-21-5.5	30	21	52					100	50
18	CQX（W）45-18-5.5	45	18	55
19	CQX（W）65-15-5.5	65	15	45
20	CQX（W）70-14-5.5	70	14	58
21	CQX（W）100-8-5.5	100	8	60
22	CQX（W）20-40-7.5	20	40	51	7.5	2900		16	80	40
23	CQX（W）45-30-7.5	45	30	52		1470			100	45
24	CQX（W）50-27-7.5	50	27	55
25	CQX（W）70-20-7.5	70	20	58
26	CQX（W）100-13-7.5	100	13	60						50
27	CQX（W）150-8-7.5	150	8	62	7.5			16	150
28	CQX（W）45-32-11	45	32	55	11			24.1	100
29	CQX（W）70-22-11	70	22	58
30	CQX（W）100-16-11	100	16	59					150
31	CQX（W）150-10-11	150	10	61
32	CQX（W）70-32-15	70	32	58	15			24.1	100
33	CQX（W）100-22-15	100	22	59
34	CQX（W）250-13-15	250	13	65					150
35	CQX（W）150-17-15	150	17	62
36	CQX（W）500-20-45	500	20	65	45	970		84	200

How to choose a submersible sewage pump?

1. Define Operating Conditions

Wastewater Properties: First, clearly define the type of wastewater the pump will be transporting, such as domestic sewage, oily wastewater, silt, etc. This directly affects the pump’s design requirements.

Water Quality Characteristics: This includes the size and concentration of solid particles and the corrosiveness of the wastewater (e.g., seawater, salinity). Select appropriate corrosion-resistant materials and filtration structures.

Operating Environment: Consider the internal and external environments of the ship, whether it is a submersible operation, the operating water depth, and whether there are impacts or vibrations.

2. Select Technical Parameters

Head (H): Calculate the head based on the total height difference of the wastewater discharge route and pipeline resistance. The pump must provide sufficient head to overcome resistance.

Flow Rate (Q): Determine the flow rate based on drainage requirements, usually in cubic meters per hour (m³/h). The flow rate must meet the discharge requirements to avoid insufficient flow or extreme power waste.

Power (P): Calculate the design power based on the head and flow rate, allowing for an appropriate margin to prevent overload operation.

3. Material and Corrosion Resistance Design

Pump Body Material: Marine environments are highly corrosive; stainless steel (316L recommended), copper alloy, or high-performance organic composite materials are preferred. Spray coating or cathodic protection are also options.

Impeller: Stainless steel impeller or wear-resistant alloy impeller ensures corrosion and wear resistance during operation.

Shaft Seal: Mechanical seal with double-end face sealing ensures leak-proof operation and resistance to acid, alkali, and salt water corrosion.

4. Motor Performance
IP68 protection rating ensures safe operation during long-term submersible operation.

Insulation class F or higher for high temperature resistance and electrical safety.

Cooling Method: Most marine submersible pumps use water-cooled motors, utilizing surrounding seawater for cooling; some designs use self-circulating cooling water.

Starting Method: Star-delta start, soft starter, etc., are selected based on the power system to avoid starting current surges.

5. Impurity Passage and Impeller Design

Impeller Type: Open or semi-open impeller with a larger channel diameter, suitable for wastewater containing solid particles such as fibers and silt.

6. **Particle Size Control:** The maximum throughput diameter must be clearly defined, such as 30mm or 50mm particles, to ensure no clogging.

7. **Ease of Installation and Maintenance:** The pump body has a compact structure and moderate weight, facilitating installation and relocation in limited space on board.

Quick disassembly design, such as quick couplings and cable quick-connect interfaces, facilitates maintenance and replacement.

Equipped with a guide rail device for easy lifting and installation of the submersible pump.

8. **Power Supply and Control:** Power supply matching: Compatible with various marine power systems (DC 24V/48V, AC 220V/380V, etc.), ensuring pump motor parameters are compatible.

Control System: Can be equipped with operation monitoring, overload protection, water level control, and anti-dry-burning protection functions, improving system intelligence.

9. **Standards and Certifications:** Classification Society Certifications: Certifications such as China Classification Society (CCS), American Bureau of Shipping (ABS), and Det Norske Veritas (DNV GL) ensure product compliance with marine safety regulations.

International Standards: Compliance with international standards such as ISO and IEC ensures product reliability and compatibility. 9. After-sales Service and Technical Support

Manufacturer Experience: We prioritize manufacturers with experience in marine pump manufacturing and providing system solutions.

Spare Parts Supply and Repair Network: We ensure timely spare parts supply to minimize pump downtime.

Technical Support: We provide selection advice, installation guidance, and troubleshooting training.

Summary and Recommendations:
First, calculate and confirm the flow rate and head based on the actual needs of ship wastewater discharge.

Select a pump body made of seawater-resistant stainless steel to ensure long-term use.

The impeller’s open, wide-orifice design effectively handles impurities and improves anti-clogging capabilities.

The motor must meet diving protection requirements and possess a good cooling and sealing structure.

Equip it with a comprehensive start-up, protection, and control system to enhance reliability and safety.

When purchasing, choose brands and manufacturers with marine certifications and extensive experience to ensure product quality and after-sales service.