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DHP High Pressure Pump For Industrial Reverse Osmosis

High Pressure Pump For Industrial Reverse Osmosis

Leading Manufacturer For Industrial High Pressure

Water Pump for ro system

· 12+ years' experience on axial piston pump manufacturer for high pressure ro applications
· Equipped with complete machining equipment
· Top-ranked quality control with 100％ inspection rate
· Custom-made service available

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What is Reverse Osmosis?

Reverse osmosis (RO) is a special type of filtration that uses a semi-permeable, thin membrane with pores small enough to pass pure water through while rejecting larger molecules such as dissolved salts (ions) and other impurities such as bacteria. Reverse osmosis is used to produce highly purified water for drinking water systems, industrial boilers, food and beverage processing, cosmetics, pharmaceutical production, seawater desalination, and many other applications. It has been a recognized technology for more than a century and commercialized since the 1960’s.

How Does Reverse Osmosis Work?

Reverse osmosis is a continuously operating treatment technology that uses pressure to pass source water through a thin membrane and thereby separate impurities from water. The desalinated water that is demineralized or deionized, is called permeate (or product) water. The water stream that carries the concentrated contaminants that did not pass through the RO membrane is called the reject (or concentrate) stream.

Reverse Osmosis works by using a ro high pressure pump to increase the pressure on the salt side of the RO and force the water across the semi-permeable RO membrane, leaving almost all (around 95% to 99%) of dissolved salts behind in the reject stream. The amount of pressure required depends on the salt concentration of the feed water. The more concentrated the feed water, the more pressure is required to overcome the osmotic pressure.

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Seawater Desalination

Water is the essential source of all life on the planet. With the growth of the world population, the availability of limited quantities of freshwater decreases. From the 71% earth surface water, 97.4% is seawater and 2.6% is freshwater. The average salt content in seawater is 3.5% – too much for human consumption. Turn Salt Water to Potable Water to Meet Urban, Industrial and Irrigational Needs.

Desalination is an ideal solution to bridge the growing water needs of the population and water scarcity worldwide. Desalination is a process for producing drinking water and service water from seawater. With the advances of desalination technologies, seawater has become an interesting water source to cope with the freshwater shortages. This process can be applied wherever a reliable source of water is needed.

Osmosis is a physical phenomenon by which two liquids, in different concentrations, separated by a semi-permeable membrane, come into contact and tend to even themselves out. The liquid with the lower concentration crosses the membrane toward that with the highest concentration. This process is inverted in reverse osmosis. We take in seawater, a highly concentrated solution, and force it through the membrane by adding pressure. On the other side, we obtain salt-free water, while back on the first side the remaining water still holds the salt the membrane prevented from passing through.

Features And Benefits

• Compact structure and high efficiency:

Compared with other types of industrial high pressure water pumps with the same flow and pressure

• Easy to install:

it can be directly installed on the motor or internal combustion engine, especially suitable for the Installation sites with sensitive space requirements;

• High pressure:

DHP series good high pressure water pumps: continuous working pressure 8Mpa; DHP-H series ultra high pressure water pumps: continuous working pressure 12Mpa

• Small pulse and low noise:

The pulse at work is much smaller than other types of industrial high pressure water pumps, and the more pistons are, the smaller the pulse, the more consistent the work; the smaller the vibration is, and the smaller the noise;

• Long service life:

the materials used are all super wear-resistant and corrosion-resistant stainless steel and PEEK Material, the service life of the high-pressure pump can reach more than 8000 hours;

• Easy to use:

integrated backwash valve to simplify the design of reverse osmosis membrane system and save space
and cost;

• Maintenance-free:

using medium water lubrication, no need to use lubricating oil, eliminating daily maintenance and the hidden danger of oil spill pollution, environmental protection;

• Wide Application:

Widely used in zero liquid discharge wastewater treatment, landfill leachate wastewater treatment, seawater desalination (RO) plant, coal mine wastewater treatment..

A Pump Assembly Process

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Performance Parameters

For DHP Series Industrial High Pressure Pumps

Work pressure	8 Mpa
Flow rate	0.2～46m³/h
Inlet pressure	1～5Bar（0.1～0.5Mpa or 14.5～72.5psi）
Circulation medium	Low viscosity liquid without solid particles
Operating temperature	+2°C～+55°C
Ambient temperature	+2℃～+55℃
Storage temperature	-40℃～70℃
Material	2205 duplex stainless steel, 2507 super duplex stainless steel and PEEK polymer material

For DHP-H Series Ultra High Pressure Pumps

Work pressure	12 Mpa
Flow rate	15～30m³/h
Inlet pressure	1～5Bar（0.1～0.5Mpa or 14.5～72.5psi）
Circulation medium	Low viscosity liquid without solid particles
Operating temperature	+2°C～+55°C
Ambient temperature	+2℃～+55℃
Storage temperature	-40℃～70℃
Material	2205 duplex stainless steel, 2507 super duplex stainless steel and PEEK polymer material

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Product Range：(electric high pressure water pumps for sale)

DHP0.6~1.0 ro high pressure pump

Pressure range: Max outlet pressure: 80 bar/1,160 psi.
Inlet pressure cont.: 1-5 bar/14.5-72.5 psi
Flow range (3000rpm): 0.61-1.01mᵌ/h, 10.17- 16.84 l/min /2.68-4.44 gpm
Speed: 700-3,450 rpm

DHP1.7~3.5 ro high pressure pump

Pressure range: Max outlet pressure: 80 bar/1,160 psi.
Inlet pressure cont.: 1-5 bar/14.5-72.5 psi
Flow range (3000rpm): 1.7-3.5mᵌ/h, 28.34-58.35 l/min /7.5-15.4 gpm
Speed: 700-3,450 rpm

DHP4.5~8.2 ro high pressure pump

Pressure range: Max outlet pressure: 80 bar/1,160 psi.
Inlet pressure cont.: 1-5 bar/14.5-72.5 psi
Flow range (1500rpm): 4.5-8.2mᵌ/h, 75-136.7l/min /19.8-36 gpm
Speed: 700-1,800 rpm

DHP11~15 ro high pressure pump

Pressure range: Max outlet pressure: 80 bar/1,160 psi.
Inlet pressure cont.: 2-5 bar/29-72.5 psi
Flow range (1500rpm): 11-15mᵌ/h, 183-250.1 l/min /48.4-66 gpm
Speed: 700-1,500 rpm

DHP16~22 ro high pressure pump

Pressure range: Max outlet pressure: 80 bar/1,160 psi.
Inlet pressure cont.: 2-5 bar/29-72.5 psi
Flow range (1500rpm): 16 - 22mᵌ/h, 266.72 - 366.74 l/min /70.4 - 96.8gpm
Speed: 700-1,500 rpm

DHP24~46 ro high pressure pump

Pressure range: Max outlet pressure: 80 bar/1,160 psi.
Inlet pressure cont.: 2-5 bar/29-72.5 psi for DHP24~ DHP38; 3-5 bar/43.5-72.5 psi for DHP46
Flow range (1500rpm): 24 - 46mᵌ/h, 400.08 - 766.82 l/min /105.6 - 202.4 gpm
Speed: 700-1,500 rpm

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Reverse Osmosis High Pressure Pump Cases

RO High Pressure Pump Specifications Guide

Product Name	RO High Pressure Pump DHP Model	RO High Pressure Pump Weight [kg]	RO High Pressure Pump Typical Flow [m3/h]	RO High Pressure Pump Typical Speed [rpm]	RO High Pressure Pump Speed Range [rpm]	RO High Pressure Pump Power Requirement @80 bar	Integrated flushing check valve	Types of pumps	RO High Pressure Pump Details
DHP0.6 RO HP Pump	AWS180B3048	3.7	0.61	3000	700~3450	2.2 kW	Yes	axial piston pumps	View Details <<
DHP0.8 RO HP Pump	AWS180B3037	3.7	0.82	3000	700~3450	3 kW	Yes	axial piston pumps	View Details <<
DHP1.0 RO HP Pump	AWS180B3049	3.7	1.01	3000	700~3450	3 kW	Yes	axial piston pumps	View Details <<
DHP1.7 RO HP Pump	AWS180B3044	7.8	1.7	3000	700~3450	5.5 kW	Yes	axial piston pumps	View Details <<
DHP2.1 RO HP Pump	AWS180B3045	7.8	2.1	3000	700~3450	7.5 kW	Yes	axial piston pumps	View Details <<
DHP2.7 RO HP Pump	AWS180B3046	7.8	2.7	3000	700~3450	11 kW	Yes	axial piston pumps	View Details <<
DHP3.5 RO HP Pump	AWS180B3032	7.8	3.5	3000	700~3450	11 kW	Yes	axial piston pumps	View Details <<
DHP4.5 RO HP Pump	AWS180B3005	34.5	4.5	1500	700~1800	15 kW	Yes	axial piston pumps	View Details <<
DHP5.3 RO HP Pump	AWS180B3006	34.5	5.3	1500	700~1800	15 kW	Yes	axial piston pumps	View Details <<
DHP6.3 RO HP Pump	AWS180B3007	34.5	6.3	1500	700~1800	18.5 kW	Yes	axial piston pumps	View Details <<
DHP7.2 RO HP Pump	AWS180B3008	34.5	7.2	1500	700~1800	22 kW	Yes	axial piston pumps	View Details <<
DHP8.2 RO HP Pump	AWS180B3010	34.5	8.2	1500	700~1800	22 kW	Yes	axial piston pumps	View Details <<
DHP11 RO HP Pump	AWS180B3211	54	11	1500	700~1500	30 kW	Yes	axial piston pumps	View Details <<
DHP13.5 RO HP Pump	AWS180B3213	54	13.5	1500	700~1500	37 kW	Yes	axial piston pumps	View Details <<
DHP15 RO HP Pump	AWS180B3214	54	15	1500	700~1500	45 kW	Yes	axial piston pumps	View Details <<
DHP16 RO HP Pump	AWS180B3250	75	16	1500	700~1500	45 kW	Yes	axial piston pumps	View Details <<
DHP17 RO HP Pump	AWS180B3251	75	17	1500	700~1500	55 kW	Yes	axial piston pumps	View Details <<
DHP19 RO HP Pump	AWS180B3252	75	19	1500	700~1500	55 kW	Yes	axial piston pumps	View Details <<
DHP22 RO HP Pump	AWS180B3253	75	22	1500	700~1500	75 kW	Yes	axial piston pumps	View Details <<
DHP24 RO HP Pump	AWS180B3055	105	24	1500	700~1500	75 kW	Yes	axial piston pumps	View Details <<
DHP26 RO HP Pump	AWS180B3057	105	26	1500	700~1500	75 kW	Yes	axial piston pumps	View Details <<
DHP30 RO HP Pump	AWS180B3062	105	30	1500	700~1500	90 kW	Yes	axial piston pumps	View Details <<
DHP38 RO HP Pump	AWS180B3071	105	38	1500	700~1500	110 kW	Yes	axial piston pumps	View Details <<
DHP46 RO HP Pump	AWS180B3072	105	46	1500	700~1780	110 kW	Yes	axial piston pumps	View Details <<
DHP-H15 RO HP Pump	AWS180B5000	105	15	750	500~750	55kW @100bar	Yes	axial piston pumps	View Details <<
DHP-H21 RO HP Pump	AWS180B5001	105	21	1000	500~1000	75kW @100bar	Yes	axial piston pumps	View Details <<
DHP-H24 RO HP Pump	AWS180B5002	105	24	1200	500~1200	90kW @100bar	Yes	axial piston pumps	View Details <<
DHP-H30 RO HP Pump	AWS180B5003	105	30	1200	500~1200	110kW @100bar	Yes	axial piston pumps	View Details <<

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Is centrifugal pump better than reciprocating pump?

You may face with the decision to use a reciprocating pump or a multi-stage centrifugal pump for a given application in the likes of Zero Liquid Discharge (ZLD) reverse osmosis system, seawater reverse osmosis system, high salt wastewater treatment plant. Let's make a simple comparison, depending on:

Comparison Items	Multistage Centrifugal Pump	Triplex Piston Pump	RO High Pressure Pump AWS-HYDRO
Effectiveness	50-70%	70-80%	>85%
Energy Consumption kWh/m³ Feedwater Flow	7.8	5.3	<4.0
Pressure Pulse	smooth	fluctuate greatly (15%)	relatively stable (2%-5%)
Environmental Pollution	No	Contaminated with lubricating oil	No
Maintenance Cycle	8000h	500-1000h	8000h
Cost	Low (1 set); High (Multistage)	High	Moderate
Pressure Range	Low Multistage centrifugal pump required	High	High
Volume and Weight 10m³/h as an example	big, >152 kg	big, >152 kg	compact, flexible installation, 52 kg
Pump Set Accessories	Requires belts and gearboxes to turn; Requires pulse absorbers; At least 4 times the volume of aws-hydro high pressure pump set	Requires belts and gearboxes to turn; Requires pulse absorbers; At least 4 times the volume of aws-hydro high pressure pump set	Direct motor connection, no need for belts and gearboxes; No pulse absorber required; Less than a quarter of the volume of a traditional piston pump set

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Documents for China ro high pressure pump DHP series

Name	Size	Downloads	Update	Category	Copy Link	Download
DHP BROCHURE.pdf	454KB	93	2021-11-23	HP Pumps Catalogs	Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=EdfUKQJaySlE&dp=GvUApKfKKUAU	Download
DHP BROCHURE.pdf 454KB 93 2021-11-23 HP Pumps Catalogs Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=EdfUKQJaySlE&dp=GvUApKfKKUAU
seawater 22-39 DATA BOOKLET -20230728 updated.pdf	274KB	62	2023-07-28	HP Pumps Catalogs	Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=zNKfAGzuIvyE&dp=GvUApKfKKUAU	Download
seawater 22-39 DATA BOOKLET -20230728 updated.pdf 274KB 62 2023-07-28 HP Pumps Catalogs Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=zNKfAGzuIvyE&dp=GvUApKfKKUAU
seawater 16-21 DATA BOOKLET -20230728 updated.pdf	365KB	45	2023-07-28	HP Pumps Catalogs	Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=CPpUAGJuSveZ&dp=GvUApKfKKUAU	Download
seawater 16-21 DATA BOOKLET -20230728 updated.pdf 365KB 45 2023-07-28 HP Pumps Catalogs Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=CPpUAGJuSveZ&dp=GvUApKfKKUAU
seawater 11-13 DATA BOOKLET -20230728 updated.pdf	313KB	54	2023-07-28	HP Pumps Catalogs	Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=tkApKvouSHfZ&dp=GvUApKfKKUAU	Download
seawater 11-13 DATA BOOKLET -20230728 updated.pdf 313KB 54 2023-07-28 HP Pumps Catalogs Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=tkApKvouSHfZ&dp=GvUApKfKKUAU
seawater 5.1-10.2 DATA BOOKLET -20230723 updated.pdf	302KB	49	2023-07-28	HP Pumps Catalogs	Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=qqfApbTFyHLt&dp=GvUApKfKKUAU	Download
seawater 5.1-10.2 DATA BOOKLET -20230723 updated.pdf 302KB 49 2023-07-28 HP Pumps Catalogs Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=qqfApbTFyHLt&dp=GvUApKfKKUAU
seawater 1.5 - 3.5 DATA BOOKLET -20230728 updated.pdf	352KB	51	2023-07-28	HP Pumps Catalogs	Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=qUfpAvekIHWZ&dp=GvUApKfKKUAU	Download
seawater 1.5 - 3.5 DATA BOOKLET -20230728 updated.pdf 352KB 51 2023-07-28 HP Pumps Catalogs Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=qUfpAvekIHWZ&dp=GvUApKfKKUAU
seawater 0.6-1.0 DATA BOOKLET -20230728 updated.pdf	328KB	58	2023-07-28	HP Pumps Catalogs	Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=zmAUflJaycDt&dp=GvUApKfKKUAU	Download
seawater 0.6-1.0 DATA BOOKLET -20230728 updated.pdf 328KB 58 2023-07-28 HP Pumps Catalogs Copy Link https://www.aws-hydro.com/phoenix/admin/download?fileId=zmAUflJaycDt&dp=GvUApKfKKUAU

High Pressure Pump For RO Plant

Generally, an RO plant for desalination consists of :
- pre-treatment (Media Filter, Dosing units, Cartridge Filters)
- RO section (H.P. Pump, Membranes/Vessels, CIP for membranes' cleaning)
- post-treatment (Sanctification, pH correction)

Regarding the Cartridge filters, they can be a single unit of 5 microns if the Media Filters have a 20-micron maximum sand size and it is multi-layers.
Normally it's not necessary for the PSV (safety valve) on the suction line of the H.P. Pump but is ok the PT in order to avoid the low pressure.
It's ok the bay pass on the H.P. Pump when the chemical washing is carried out.
Normally a cartridge filter is located directly on the CIP skid so the chemical solution is already cleaned 5 microns and can be sent directly on the H.P. Pump suction.

The PSV on the H.P. Pump discharge is not necessary if you install an HPT (High-Pressure Switch or Transmitter).

SWRO Pump

3 parameters are important for SWRO, that is, temperature, recovery rate, and TDS, you have to keep them low as much as your can. If you increase RR 50 (which is too high say in Egypt to use it), then maybe fowling and repairing membrane within less than 1 year....you have to consider when selecting membrane with TDS and RR. So, in order to get a right selection of an SWRO pump, generally, we should know the parameters below:

1. What is the pumped medium?

2. What are the working pressure and flow rate?

3. What is the TDS, Temperature, RR, and Membrane pressure difference?

ex. if one needs a pump + ERD for a plant 500CMD (20M3/H) product water for drinking, how would you select an SWRO pump?

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H.P. pump for containerized RO plant

Piston Pump

The produced water in one container is generally 200~500m³/d. A container may need to submit 200m3/d -300 - 400m3/d for RO membrane, should it be configured with an energy recovery device(ERD), one piece of the DHP46 RO high pressure pump should satisfy the requirement.

Centrifugal Pump

A pre-filter solution - mechanical self-cleaning filter in a 20'' container (capacity 300-600m3/h); another container in serial with 200-400m3/h - with H.P. pumps and recovery units; the last container will be 1-3 * 20'' or 40'' container with RO membrane to produce the freshwater according to the pre-filter solutions and H.P. pumps can give under different ro water conditions, So there will be many containers in serial. A high-pressure centrifugal pump would suit the requirement, should it be configurated with an energy recovery device, the flow of one set H.P. pump still needs 200~400m3/h, but the centrifugal pump may be too big in size for a container, that is the question.