The GUARDIAN features a twostage process; an efficient depth 

filter to remove sediment and larger 

organisms, and a powerful UV 

disinfection unit to kill or inactivate 

smaller plankton, bacteria and other 

pathogens. 

In designing the GUARDIAN 

system, Hyde selected the most 

robust and reliable components 

available. Our filter and UV 

technology has been proven in 

thousands of challenging water and 

wastewater treatment applications, 

ensuring the highest performance 

for this essential shipboard 

operation. 

The Hyde GUARDIAN is integrated 

into the ship’s ballast system so that 

treatment occurs automatically, with 

minimal effect on crew compliment 

or vessel operations. Simple and 

straightforward.

The Hyde GUARDIAN® Ballast Water Treatment System is the simple and 

cost effective solution which exceeds international ballast water discharge 

requirements. Lloyd’s Register and MCA Type Approval, April 2009.

T H E T Y P E A P P R O V E D S O L U T I O N

TYPE

APPROVAL
Standard	 Capacity Power (kW)

Model	 m3/h (GPM)	 Nominal/Maximum

HG60	 60 (264) 	 10/15

HG150	 150 (660) 	 10/15

HG250	 250 (1100)	 18/25

HG300	 300 (1320)	 24/34

HG350	 350 (1540)	 36/50

HG450	 450 (1980)	 36/50

HG500	 500 (2200)	 36/50

HG600	 600 (2640)	 36/50

HG700 	 700 (3080)	 53/75

HG800	 800 (3520)	 53/75

HG900	 900 (3960)	 53/75

HG1000	 1000 (4400)	 78/114

HG1250 	 1250 (5500)	 78/114

HG1350 	 1350 (5940)	 78/114

HG1488 	 1488 (6550)	 78/114

Custom 

ModelS

HG1600	 1600 (7040)	 106/150

HG1800	 1800 (7920)	 106/150

HG2000	 2000 (8800)	 156/228

HG2500	 2500 (11000)	 156/228

HG3000	 3000 (13200)	 234/342

HG4000	 4000 (17600)	 312/456

HG5000	 5000 (22000)	 312/456

HG6000	 6000 (26400)	 424/600

FILTERS 	 	 	 	 	 POWER PANEL IN NEXT COMPARTMENT	 CONTROLS UV UNIT

ECONOMY

The affordable Hyde GUARDIAN system has a low 

installation cost, low operating cost and extremely 

low consumables cost over the life of the vessel. The 

low pressure drop of the system ensures minimal 

effect on vessel ballasting rates and turn-around 

time. The resulting low total cost of ownership 

ensures that Hyde GUARDIAN owners achieve 

compliance while gaining a competitive edge in 

their core business.

SMALL SPACE AND EASE OF

INSTALLATION

The flexible, modular design of the 

GUARDIAN allows it to be installed 

in even the most crowded machinery 

spaces. The filtration system can 

be delivered in small modules to 

be configured in a variety of shapes 

to fit available space. The Hyde 

GUARDIAN system is designed for 

minimum pressure drop, allowing 

use of existing ballast pumps. The 

modest energy consumption of 

the UV system in most cases allows 

installation of the system without 

major upgrades to the electrical 

generating and distribution 

system. Interface with the existing 

ballast system is simple and many 

installations are completed without 

requiring drydock and even while the 

vessel is in commercial operation.

T H E S Y S T E M S O L U T I O N

SYSTEM OPERATION

The Hyde GUARDIAN system is fully integrated into 

the ship’s control and automation system. During 

ballasting, water is processed through both the filter 

and UV stages as it is pumped from seachest to the 

ballast tanks. All solids and organisms captured 

by the filters are discharged during backflushing to 

the location they entered. During de-ballasting, 

the filter is bypassed and water flows only through 

the UV system before discharging overboard. Hyde 

GUARDIAN system and ballast operation data 

are automatically logged by the system and water 

sampling ports are installed in accordance with IMO 

G2 Guidelines.

INLET

OUTLET

BACKWASH

GUARDIAN DURING BALLAST

INLET

OUTLET

GUARDIAN DURING DE-BALLAST
T H E F I L T E R S O L U T I O N

Ballast water is a particularly challenging 

filtration application due to the constantly 

changing biological and sediment loading, 

the corrosive nature of seawater, and the high 

flow required compared to power and space 

available. After years of testing different filter 

technologies for ballast water treatment, Hyde 

selected a unique stacked-disk filtration system 

as the standard for the Hyde GUARDIAN. 

This technology combines performance 

and efficiency of a 

depth filter with 

reliable automatic 

backflushing 

capability superior 

to that of a barrier 

filter. 

Other important 

benefits include 

corrosion-free materials 

of construction, low 

pressure drop, ability 

to handle heavy 

sediment loading, 

low maintenance 

requirements, and 

modular design that 

allows flexibility to install 

in existing machinery spaces. 

Filtration

The automatic backflushing filter ensures 

reliable removal of solids and larger organisms. 

The filter contains several modules of “stackeddisk” filter elements that capture and store 

large amounts of solids. The filter is designed 

to automatically backflush itself at the end of 

each ballasting operation and, when necessary, 

clean one module at a time using filtered 

water from the remaining modules. This allows 

for continuous ballast flow and immediate 

discharge of the filtered material back into the 

ballast water source.

The Stacked-Disk Filter Design

Thin nylon disks are diagonally grooved on 

both sides to a specific micron size. These 

disks are stacked and compressed on 

special spines to create filter 

elements. The grooves 

on top of each disk run 

opposite to the grooves 

below, forming 

a statistically 

significant 

series of 

valleys and 

traps for solids. 

As water flows 

from the outside of 

each element to the 

core, the intersections 

of the grooves form dozens 

of stopping points in each 

flow path, thus creating 

an efficient depth filter to 

capture solids. 

The stacked-disk elements 

are enclosed in a corrosion 

and pressure resistant housing module 

with a number of modules assembled in the 

system to provide the desired capacity.

What makes this filter design 

so special is how it is cleaned. 

During filtration the disks 

are tightly compressed 

together by spring and 

differential pressure. When 

a preset pressure differential 

is reached, a patented 

backflushing process quickly 

and efficiently cleans the 

entire module, while creating 

a small total backflush 

volume. 

The first step in the backwash 

cycle is to activate the 3-way 

valve, which closes the 

inlet and opens the drain. By removing the 

differential pressure in the system, the spine 

piston rises up releasing the compression 

on the disks. Tangential jets of clean water 

are pumped at high pressure in the opposite 

direction through nozzles at the center of the 

spine. The disks spin free and clear, loosening 

the trapped solids. Solids are quickly and 

efficiently flushed out through the drain and 

immediately overboard. As this water contains 

only organisms that were recently picked 

up, they are simply being returned to the 

environment from which they came.

Each module, with five to eight stacked disk 

elements, is completely cleaned in 10 to 20 

seconds. The backflush process is repeated with 

each module until the entire filtration system is 

clean. This automatic backwashing ensures that 

the system operates reliably and with minimal 

reduction of ballast water flow. 

Sizing

The filter systems used in the different Hyde 

GUARDIAN systems are sized to provide 

an efficient filtration of the total required 

ballast water flow. The chart below shows the 

maximum allowable flow for each filter module 

size in the Hyde GUARDIAN range.

When sizing and choosing the correct filter 

system for each customer, the filtration capacity 

selected is always at least one unit higher than 

the required ballast water flow rate.

PARAMETERS	 GUARDIANTM 

DISK (DEPTH) FILTER HYDRO CYCLONE	 SCREEN FILTER

Filtration Large Sediment	 Excellent Fair	 Fair

Filtration Large Organisms	 Excellent Poor	 Fair

Back-Flush Volume	 Excellent Poor	 Fair

Energy Conservation Excellent Poor	 Fair

High Sediment Loading	 Excellent Fair	 Poor

Pressure Drop	 Excellent (<1 bar)	 Poor (2.5-5.0 bar)	 Fair (>2.0 bar)

FILTER COMPARISON

FILTER MODULE SIZE	 3”	 4”	 6”

Max Flow /per module (m3/hr) 10 50 80

Number of spines 1 5 8

Flow rate / spine 10 10 10
T H E U V D I S I N F E C T I O N S O L U T I O N

The Hyde GUARDIAN uses a high intensity 

ultraviolet (UV) treatment as a means of 

disinfection. The UV chamber is carefully 

designed for minimum pressure drop, 

maximum retention time, and compatibility 

with the marine operating environment. 

UV dosage is a combination of lamp power, UV 

transmission, distance from the lamp sleeves, 

and exposure time. The flow velocity through 

the UV chamber is optimized to be within the 

range of 0.5 m/s to 3.0 m/s.

The advantages of using UV rather than 

chemical disinfection include:

 • UV runs automatically with very little 

operator attention

 • UV does not contribute to corrosion like 

chemical oxidants 

 • UV does not require transportation, 

storage or handling of hazardous material 

 • UV requires minimal space for chemical 

storage equipment and contact chamber 

 • UV has no danger of overdosing 

 • Organisms cannot build resistance 

against UV 

 • UV does not require dilution or 

deactivation 

 • UV has no known toxic or significant 

nontoxic by-products 

 • UV is 100% safe without side effects

UV Light

Ultraviolet light is the part of the 

electromagnetic spectrum just below the visible 

portion and it can be further broken down into 

four smaller bands:

 • UV-A 315nm-400nm

 • UV-B 280nm-315nm

 • UV-C 200nm-280nm

 • UV-Vac 10nm-200nm

The portion that is known as germicidal is the 

region of UV-C from 240-280nm, with a peak at 

264nm. UV-C light deactivates or damages the 

DNA of organisms, killing them or making them 

unable to reproduce. 

UV light is produced using mercury vapor 

lamps. There are two basic types of UV lamp 

technology. The first is called a low pressure 

lamp. It excites the mercury molecules to a 

relatively low level resulting in a monochromatic 

output at 254nm. The medium pressure lamps 

that the Hyde GUARDIAN utilizes produce a 

polychromatic output across the entire spectrum 

of the germicidal curve. The relative germicidal 

effectiveness is shown on the diagram at right. 

The UV lamps used in the Hyde GUARDIAN have 

an expected service life of 8000 hours, which is 

far superior to other lamp types. 

Treatment Chamber

The Hyde GUARDIAN UV system includes a 

specific number and size of UV lamps depending 

on the total ballast water flow to be treated. 

These lamps are housed in high quality quartz 

sleeves, which pass through the corrosion 

resistant treatment chamber. The system 

employs an automatic wiping mechanism to keep 

deposits from accumulating on the sleeves. In 

addition there is a temperature sensor to monitor 

water temperature, a UV sensor to measure the 

relative intensity of the UV lamps, a drain, and air 

relief valves. For routine checks, maintenance and 

replacement of the quartz sleeves and wipers, the 

chamber has an inspection and access hatch.

Sizing

The UV treatment system in each Hyde 

GUARDIAN model is sized to provide a minimum 

average dose, at maximum rated ballast flow, at 

the end of the lamp life. Sizing is according to 

the chart below.

* Maximum power is typically only drawn when the system is in the highest power level, during the last 1⁄4 of the 

lamp’s life or when UV transmission is low due to exceptionally poor ballast water quality.

161235	 201235	 201835	 201850

488	 694	 1033	 1488

12	 12	 18	 18

B3535	 B3550	 B3550	 B5050

2650 to	 2650 to	 2650 to	 3900 to

3750	 3750	 3750	 5700

50	 50	 75	 114

Model No.	 160620	 160635	 160835

Max Flow (m3/hr)	 153	 255	 331

No. of lamp	 6	 6	 8

Type of lamp	 B2035	 B3535	 B3535

Lamp Power (W)	 1500 to	 2650 to	 2650 to

2240	 3750	 3750

Max Power (kW)*	 15	 25	 34
	 FILTER	 	 	 UV	 	 	 POWER PANEL	 	 CONTROL CABINET	 TOTAL	 	 SKID	 	 	

Hyde	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 WEIGHT	

GUARDIAN®	 Filter	 UV	 	 L1	 W1	 H1	 L2	 W2	 H2	 L3	 W3	 H3	 Qty	 L4	 W4	 H4	 kg	 L5	 W5	 H5	 kg

60	 3” x 8 	 080620	 	 1100	 900	 1290	 800	 800	 500	 800	 400	 1200	 1	 600	 210	 760	 441	 2100	 1500	 150	 550

150	 4” x 4	 160620	 	 1000	 1100	 1250	 1100	 900	 600	 800	 400	 1200	 1	 600	 210	 760	 832	 2300	 2000	 150	 600

250	 4” x 6	 160635	 	 1500	 1100	 1250	 1100	 900	 600	 1200	 400	 1700	 1	 600	 210	 760	 968	 2800	 2000	 150	 700

300	 4” x 8	 160835	 	 2000	 1100	 1250	 1100	 900	 600	 1200	 400	 1700	 1	 600	 210	 760	 1150	 3300	 2000	 200	 950

350	 4” x 8	 161235	 	 2000	 1100	 1250	 1100	 900	 600	 1200	 400	 1700	 1	 600	 210	 760	 1250	 3300	 2000	 200	 950

450	 4” x 10	 161235	 	 2500	 1100	 1250	 1100	 900	 600	 1200	 400	 1700	 1	 600	 210	 760	 1386	 3800	 2000	 200	 1100

500	 4” x 12	 201235	 	 3000	 1100	 1250	 1300	 1100	 800	 1200	 400	 1700	 1	 600	 210	 760	 1673	 4500	 2000	 200	 1400

600	 6” x 8	 201235	 	 2700	 1900	 1900	 1300	 1100	 800	 1200	 400	 1700	 1	 600	 210	 760	 2036	 3	 3	 3	 3

700	 6” x 10	 201835	 	 3300	 1900	 1900	 1300	 1100	 800	 1200	 400	 1700	 2	 800	 300	 1000	 2850	 3	 3	 3	 3

800	 6” x 12	 201835	 	 3900	 1900	 1900	 1300	 1100	 800	 1200	 400	 1700	 2	 800	 300	 1000	 3145	 3	 3	 3	 3

900	 6” x 12	 201835	 	 3900	 1900	 1900	 1300	 1100	 800	 1200	 400	 1700	 2	 800	 300	 1000	 3145	 3	 3	 3	 3

1000	 6” x 14	 201850	 	 4500	 2100	 2100	 1300	 1100	 800	 1200	 400	 1700	 3	 800	 300	 1000	 3941	 3	 3	 3	 3

1250	 6” x 16	 201850	 	 5200	 2100	 2100	 1300	 1100	 800	 1200	 400	 1700	 3	 800	 300	 1000	 4236	 3	 3	 3	 3

1350	 6” x 18	 201850	 	 5800	 2100	 2100	 1300	 1100	 800	 1200	 400	 1700	 3	 800	 300	 1000	 4532	 3	 3	 3	 3

1488	 6” x 20	 201850	 	 6500	 2100	 2100	 1300	 1100	 800	 1200	 400	 1700	 3	 800	 300	 1000	 5700	 3	 3	 3	 3

1600 (HG800x2)	 6” x 24	 201835 x 2	 	 2 2	 2	 1300	 1100	 800	 1200	 400	 1700	 4	 800	 400	 1700	 6291	 3	 3	 3	 3

2000 (HG1000x2)	 6” x 28	 201850 x 2	 	 2 2	 2	 1300	 1100	 800	 1200	 400	 1700	 6	 800	 400	 1700	 7882	 3	 3	 3	 3

2500 (HG1250x2)	 6” x 32	 201850 x 2	 	 2 2	 2	 1300	 1100	 800	 1200	 400	 1700	 6	 800	 400	 1700	 8473	 3	 3	 3	 3

3000 (HG1000x3)	 6” x 42	 201850 x 3	 	 2 2	 2	 1300	 1100	 800	 1200	 400	 1700	 9	 1200	 400	 1700	 11800	 3	 3	 3	 3

4000 (HG1350x3)	 6” x 56	 201850 x 3	 	 2 2	 2	 1300	 1100	 800	 1200	 400	 1700	 9	 1200	 400	 1700	 13868	 3	 3	 3	 3

5000 (HG1250x4)	 6” x 64	 201850 x 4	 	 2 2	 2	 1300	 1100	 800	 1200	 400	 1700	 12	 1200	 400	 1700	 16850	 3	 3	 3	 3

6000 (HG1250x5)	 6” x 80	 201850 x 5	 	 2 2	 2	 1300	 1100	 800	 1200	 400	 1700	 15	 1200	 400	 1700	 21014	 3	 3	 3	 3

MAIN COMPONENTS

WEIGHTS AND DIMENSIONS1

1 - For reference only, technical specifications are subject to change without notice.

2 - Consult factory

3 - Skid mounting is not an option due to size of system

S P E C I F I C A T I O N S
ECONOMY

Total Cost of Operation - Low

Power Consumption – Low	

Pressure Drop – Low

Consumables – Low

Moving Parts – Few		

Existing Ballast Pump Compatible

Footprint - Small, Modular	

EFFICIENCY

IMO Type Approved	

Meets Future Higher Standards

Filter System – High Efficiency Disk

Sediment Removal	 	

Ballast Water UV Treated	

De-ballast Water UV Treated	

Backflush – Automatic at Site	

ENVIRONMENT

Chemicals or Active Substances

Chemical/Active Substance Storage

Hazardous for Crew	

Special Training for Crew	

Added Risk of Corrosion

q

q

q

q

q

q

q

q

q

q

q

q

q

q

q

q

q

q

q

4

4

4

4

4

4

4

4

4

4

4

4

4

4

8

8

8

8

8

THE HYDE GUARDIAN® ADVANTAGE COMPARE FOR YOURSELF

Hyde Marine, Inc., 28045 Ranney Parkway, Cleveland, Ohio 44145 USA 

Tel: +1 440 871 8000, Fax: +1 440 871 8104, e-mail: sales@hydemarine.com

World Wide Offices and Agent Network: www.hydemarine.com

A DIVISION OF CALGON CARBON CORPORATION

L e a v e N o t h i n g b u t Y OU R W a k e .