R J Mellor & Co Ltd THE FIRST AND LAST WORD IN FLUID STRAINING - - PowerPoint PPT Presentation

THE FIRST AND LAST WORD IN FLUID STRAINING R J Mellor & Co Ltd

Unique Operating Features That Provide Real Benefits

• The Hellan Strainer design provides solids removal without interrupting the

fluid flow - (eliminating downtime for solids removal).

• Employees are not exposed to possible contaminants and/or hazardous

materials during the cleaning cycle. (No baskets to remove to clean or empty)

• Minimal labour required for solids removal from fluid flow. Manually
• perated models require less than 30 seconds per cleaning cycle. Automatically
• perated strainers require no labour and are controlled by timers or pressure

differential switches.

• Depending on size and material can be 45% lighter than a conventional dual

basket strainer and substantially smaller dimensionally.

• Up to 12” can be installed in any plane in the pipe-line without the need for

additional support. R J Mellor & Co Ltd

1) Fluid passes into the strainer and through a screen. 2) A deflection rib protects the screen from large objects. 3) The screened fluid flows out of the strainer and into service. 4) Rotating the screen, by either handwheel

• r motor, moves the outer screen surface

against a scraper bar or brush. The scraper bar or brush removes collected debris from the screen’s outer surface. 5) Debris falls to to the sump area of the strainer where it is removed by periodic flushing. 6) Large inspection ports, sealed with O-rings, permit easy, external adjustment of the scraper bar or brush. Multiple screen models size 4” and larger, plus 3” single screen models. 7) O-rings at the screen cover plate and shaft provide a tight seal while allowing operation at low torque.

R J Mellor & Co Ltd

Quality Assurance

Underwriters Laboratories

Non-automatic Hellan Strainers constructed of cast iron, cast or stainless steel in pipe sizes from 2" through to 14" with screen perforations

• f 3/32", 1/8" or 3/16" are listed with

Underwriters Laboratories (Re-examination Service) and are UL listed under strainers, Pipe Line (HLCV), File EX 1708 (N),"Fire Main Line Strainer".

American Bureau of Shipping

Hellan Strainers are certified for service with fuel oil, lube oil, fresh and sea water service by the American Bureau of Shipping. ABS has rated Hellan Strainers for 150 psi (10.34 bar) MAWP to 740 psi (51.02 bar) MAWP, depending on flange class, construction material and temperature of the process fluid.

American Society of Mechanical Engineers (ASME)

Hellan Strainers are designed in accordance with ASME Boiler and Pressure Vessel Code Section 8. All strainers are proof tested at 150% of their recommended maximum allowable operating pressure.

ISO 9001 Certificate No QSC-4386

Quality System certified by:- DET NORSKE VERITAS

Fluid Control Institute

Hellan Strainers are manufactured in accordance with FCI standard 78-1.

National Fire Sprinklers Association, Inc

Hellan Strainers are available in models that comply with most international standards, including D.I.N., I.E.C. and Cenlec specification.

R J Mellor & Co Ltd

Selecting A Hellan Strainer

Selecting the Perforation Size

Hellan Fluid Strainers recommend that a screen perforation hole diameter be selected that is 40 to 60% of the diameter of the smallest orifice in the system. Selecting a smaller perforation than required leads to unnecessary cleaning cycles and higher pressure drops during operation.

R J Mellor & Co Ltd

STRAINER SIZE OPTIONS Pipe Size Flow Inches mm US.g.p.m. Ltr.p.m. 2" 50.8 80 302 2.5" 63.5 130 492 3" 76.2 200 757 4" 101.6 300 1,135 6" 152.4 750 2,839 8" 203.2 1,250 4,731 10" 254 1,750 6,624 12" 304.8 2,300 8,706 14" 355.6 3,500 13,248 16" 406.4 4,600 17,412 20" 508 8,000 30,283

Flows are based on 1.5 psi clean pressure drop with a screen perforation of 1/32". SEE CATALOGUE FOR FURTHER INFORMATION

Existing Pipe Size Method

• This method is used when a Hellan Strainer is installed in an

existing network of piping. Flow rate and attendant pressure drop are within the application requirements. In these situations, it is common practice to select a strainer size that matches the existing pipe size, i.e. an 8" strainer would be selected for an installation with an existing 8" line. Flow Rate Requirement Verses Pressure Drop Method

• This method should be utilized when selecting a strainer for

a new installation or as a replacement strainer in an existing system where a specific flow and pressure rate are required.

Sizing the Strainer

R J Mellor & Co Ltd

1/64"STAGGERED (0.4825 mm) 30% open 1/32"STAGGERED (0.965 mm) 20% open 1/16"STAGGERED (1.588 mm) 24% open 3/32"STAGGERED (2.381 mm) 33% open 1/8"STAGGERED (3.175 mm) 40% open 3/16"STAGGERED (4.763 mm) 51% open 1/4"STAGGERED (6.350 mm) 58% open

Standard Perforated Metal Screen Options

R J Mellor & Co Ltd

Inches Mesh Micron 0.015 40 385 0.009 60 230 0.007 80 180 0.005 100 140 0.004 150 100 0.002 300 50 0.001 ~ 25 0.0006 ~ 15 NOTE:- Other wedge-wire slot sizes are available to special order

Standard Wedge Wire Screen Options

R J Mellor & Co Ltd

STANDARD STRAINER BODY MATERIALS THREADED AND FLANGE OPTIONS

Cast Iron

Cast Steel

• St. Steel

Cast Bronze

STRAINER TYPE NPT Class 125 Class 250 NPT Class 150 Class 300 Class 150 Class 300 Class 150 Class 300 1.5" In-Line Flow (1.5S) x x 2.0" Angle Flow (2A) x x x 2.0" In-Line Flow (2.S) x x x 2.5 " Angle-Flow (2.5A) x 2.5" In-Line Flow (2.5S) x x 2.5" In-Line Flow (2.5D) x 3.0" In-Line Flow (3S) x x x 3.0" Angle Flow (3A) x x x x 3.0" In-Line Flow (3D) x x x x 4.0" In-Line Flow (4D) x x x x x x x x 6.0" In-Line Flow (6D) x x x x x x x x 8.0" In-Line Flow (8D) x x x x x x x x 10" In-Line Flow (10D) x x x x x x x 12" In-Line Flow (12D) x x x x x x x

R J Mellor & Co Ltd

STANDARD STRAINER BODY MATERIALS THREADED AND FLANGE OPTIONS Cast Iron Cast Steel

• St. Steel

Bronze STRAINER TYPE

Class 125 Class 250 Class 150 Class 300 Class 150 Class 300 Class 150 Class 300 14" In-Line Flow (14SA) x 14" In-Line Flow (14Q) x 16" In-Line Flow (16SA) x 16" In-Line Flow (16Q) x 20" In-Line Flow (20WDA) 20" In-Line Flow (20H) x 24" In-Line Flow (24W3DA) 30" In-Line Flow (30WDA) 36" In-Line Flow (364DA)

R J Mellor & Co Ltd

STANDARD STRAINER BODY MATERIALS AND FLANGE OPTIONS Fabricated Carbon Steel Fabricated Carbon Steel STRAINER TYPE

Class 150 Class 300 Class 150 Class 300 14" In-Line Flow (14SA) x x 14" In-Line Flow (14Q) 16" In-Line Flow (16SA) x x 16" In-Line Flow (16Q) 20" In-Line Flow (20WDA) x x 20" In-Line Flow (20H) 24" In-Line Flow (24W3DA) x x 30" In-Line Flow (30WDA) x x 36" In-Line Flow (364DA) x x

R J Mellor & Co Ltd

Cast Iron Cast Steel Stainless Steel Bronze Strainer Type Flow Wgt Class 125 Class 250 Wgt Class 150 Class 300 Wgt Class 150 Class 300 Wgt Class 150 Class 300 Lpm Kg Bar Bar Kg Bar Bar Kg Bar Bar Kg Bar Bar 1.5” In-Line Flow TSH 360 21 12.06 22 15.6 18.96 15.6 1.5” In-Line Flow TSA 360 46 12.06 47 15.6 18.96 15.6 2.0” In-Line Flow TSH 360 21 12.06 22 15.6 18.96 15.6 2.0” In-Line Flow TSA 360 46 12.06 47 15.6 18.96 15.6 2.0” Angled Flow AH 360 32 12.06 34 15.6 18.96 15.6 2.5” In-Line Flow TSH 606 38 12.06 40 15.6 18.96 15.6 2.5” In-Line Flow TSA 606 63 12.06 65 15.6 18.96 15.6 2.5” Angle Flow AH 606 32 12.06 34 15.6 18.96 15.6 2.5” In-Line Flow DH 606 45 12.06 48 15.6 18.96 15.6 3.0” In-Line Flow TSH 890 38 12.06 40 15.6 18.96 15.6 3.0” In-Line Flow TSA 890 63 12.06 65 15.6 18.96 15.6 3.0” Angled Flow AH 890 32 12.06 34 15.6 18.96 15.6 3.0” Angled Flow AA 890 69 12.06 74 15.6 18.96 15.6 3.0” In-Line Flow DH 890 61 12.06 66 15.6 18.96 15.6 NB.Pressure ratings shown are for a maximum temperature of 100oF ( 37.78oC ) for steel and stainless steel and 150oF ( 65.56oC ) for cast iron and bronze

Pressure Ratings & Flow Rates

The table below provides both pressure and flow rates for standard Hellan Strainers (0.1034214 bar (1.5 psid ) with 1/8" perforated screen). Refer to catalogue for further information.

R J Mellor & Co Ltd

Cast Iron Cast Steel Stainless Steel Bronze Strainer Type Flow Wgt Class 125 Class 250 Wgt Class 150 Class 300 Wgt Class 150 Class 300 Wgt Class 150 Class 300 Lpm Kg Bar Bar Kg Bar Bar Kg Bar Bar Kg Bar Bar 4” In-Line Flow DH 1,363 77 / 86 12.06 24.3 82 / 90 19.65 31.02 18.96 31.02 15.16 31.02 4” In-Line Flow DA 1,363 145 /154 12.06 24.3 150 /159 19.65 31.02 18.96 31.02 15.16 31.02 6” In-Line Flow DH 3,331 182 / 193 12.06 24.3 195 / 207 19.65 31.02 18.96 31.02 15.16 31.02 6” In-Line Flow DA 3,331 254 / 268 12.06 24.3 266 / 279 19.65 31.02 18.96 31.02 15.16 31.02 8” In-Line Flow DH 5,489 318 / 341 12.06 24.3 341 / 364 19.65 31.02 18.96 31.02 15.16 31.02 8” In-Line Flow DA 5,489 391 / 414 12.06 24.3 414 / 432 19.65 31.02 18.96 31.02 15.16 31.02 10” In-Line Flow DH 7,855 432 /466 12.06 24.3 454 /488 19.65 31.02 18.96 31.02 15.16 31.02 10” In-Line Flow DA 7,855 511 / 545 12.06 24.3 534 / 568 19.65 31.02 18.96 31.02 15.16 31.02 12” In-Line Flow DH 10,410 614 / 659 12.06 24.3 659 /704 19.65 31.02 18.96 31.02 15.16 31.02 12” In-Line Flow DA 10,410 693 / 739 12.06 24.3 739 / 784 19.65 31.02 18.96 31.02 15.16 31.02

Pressure Ratings & Flow Rates

The table below provides both pressure and flow rates for standard Hellan Strainers (0.1034214 bar (1.5 psid ) with 1/8" perforated screen). Refer to catalogue for further information.

R J Mellor & Co Ltd

STRAINER TYPE

Cast Iron & Fabricated Carbon Steel Fabricated Stainless Steel Flow Class 125 Wgt Class 150 Class 300 Wgt Class 150 Class 300 Lpm Bar Kg Bar Bar Kg Bar Bar 14” In-Line Flow QH 15,520 5.17 1,024 14” In-Line Flow QA 15,520 10.34 1,800 14” In-Line Flow SA 15,520 5.17 658 5.17 5.17 14“ In-Line Flow WDA 15,520 658 5.17 5.17 16” In-Line Flow QH 20,063 1,341 16” In-Line Flow QA 20,063 10.34 2,100 16” In-Line Flow WDA 20,063 726 5.17 5.17 20” In-Line Flow HH 31,230 1,043 20” In-Line Flow HA 31,230 10.34 2,588 20” In-Line Flow WDA 31,230 1,043 5.17 5.17 24” In-Line Flow WDA 40,315 1,676 5.17 5.17 30” In-Line Flow WDA 63,027 3,175 5.17 5.17 36” In-Line Flow WDA 90,850 5,443 5.17 5.17

ALL CARBON STEEL FABRICATED STRAINERS ARE WITH INTERNAL COATING FOR SEA WATER APPLICATIONS

Pressure Ratings & Flow Rates

The table below provides both pressure and flow rates for standard Hellan Strainers (0.1034214 bar (1.5 psid ) with 1/8" perforated screen). Refer to catalogue for further information.

R J Mellor & Co Ltd

First remove the lock nut and pull the hand wheel free Remove set screws and slide the geared motor onto the shaft Introduce new set screws and secure geared motor

Converting from Manual to an Automatic Cleaning Cycle

R J Mellor & Co Ltd

Self-Cleaning Filtration

Hellan Strainer is a leading manufacturer of filtration products for military and commercial ships throughout the world.

Princess Cruises United States & British Navy

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Hellan Strainer History With United States Navy

1992:- After 12 months testing aboard USS Anzio (CG-47 class Cruiser) all strainers used in seawater applications have been replaced with Hellan Strainers Total 594 1995:- US Navy were so impressed with the performance on the CG-47 Vessels that the new DDG-51 class destroyers were all retro-fitted with the sea water strainers. Total of 806 strainers have been fitted on hulls 51 through to 83. 2007:- The US Navy built 60 new vessels all fitted with HELLAN STRAINERS Since 1992 over 6,000 strainers have been supplied and installed on every different class of surface ship of the US Navy R J Mellor & Co Ltd

UK- Ministry of Defence Engineers have Visited Hellan Strainers

The visit was to inspect and evaluate strainers aboard a number of different class vessels in the US navy fleet, receiving excellent recommendations from the engineers of each of the vessels visited. The net result has been after, shock/vibration test approval, the supply to BAE systems of several 8" manual strainers for the main seawater systems on the new Type 45 Destroyers. R J Mellor & Co Ltd

• Less Weight :-

the Hellan design is 1/3 lighter than conventional duplex (twin basket) type

• strainers. It is also lighter than simplex (single basket) type strainers that

they also replace.

• Minimal Life Cycle Costs :–

the Hellan design requires minimal maintenance for low life cycle costs. It has been designed to last a minimum of 25 years in seawater applications.

• Reduced Manning :–

the Hellan self-cleaning strainer can be cleaned in 30 seconds or less without any disassembly, whereas a conventional strainer (simplex/single basket or duplex/twin basket) normally takes an hour or longer to clean. Manning reduction’s means cost savings to the Navy.

The Reason to Change

R J Mellor & Co Ltd

• Conversion to Automatic Cleaning :-

every manual Hellan strainer can be easily converted to a completely motorised model within a very short time. The US Navy has begun this conversion programme. The Navy’s plan is to convert all Hellan manual strainers to fully automatic operation throughout the fleet. This, in turn, will reduce the sailor headcount aboard each class of

• ship. ( The conversion is shown on slide 10 and page 15 of the

catalogue.)

• Excellent Quality:–

because of Hellan’s excellent quality, confirmed by, ISO 9001 and Lloyd’s Register, the US Navy has purchased very few replacement parts for the 6,000 Hellan strainers installed in their fleet.

The Reason to Change

R J Mellor & Co Ltd

Seawater Applications

Hellan Strainers installed on US navy ships are normally installed downstream (positive pressure) of a centrifugal pump. On applications requiring the strainer to be installed upstream

• f a pump, Hellan offers an eductor or jet pump to assist in the

cleaning cycle. This device initiates suction on the discharge line of the Hellan strainer to remove solids from the strainer during the cleaning cycle; and can be used with both manual and automatic models. R J Mellor & Co Ltd

Typical Installation of an Eductor

R J Mellor & Co Ltd

Seawater Product line

Pipe Sizes:- 1.5" to 16" Manufactured from bronze with monel internal components 20" to 36" manufactured from fabricated carbon steel internally coated with monel internal components ANSI Pressure Class:- 125, 150 and 250 Flow Rates with 1.5 psid. :- 360 to 90,850 litres per minute Filtration:- 0.004”(0.10mm) to 0.25” (6.35mm) R J Mellor & Co Ltd

Fuel Oil Application

Model 611 Standard Pressure Pipeline Size:- 6" Pressure Class:- 150 (PN10) Material of construction:- 316 stainless Steel Flow:- 250 US gpm (1,000 lpm) Filtration:- 0.004” (0.10mm) Model 311 High Pressure Pipeline Size:- 3" Pressure Class:- 600 PSI (PN40) Material of construction:- 316 stainless Steel Flow:- 200 US gpm (800 lpm) Filtration:- 0.015 (0.38mm) R J Mellor & Co Ltd

Weight Saving Comparison Chart Illustrated by a US Navy Vessel

Equipment Serviced

• Qty. of

Strainers Strainer Size Duplex Weight Hellan Weight Weight Saving A/C Condensers 7 8” 818.0 kg x 7 318kg x 7 3,500.0 kg

• Refr. Condensers

2 2” 60.5 kg x 2 34kg x 2 53.0 kg Main Prop Diesel 4 8” 818.0 kg x 4 318kg x 4 2,000.0 kg Ships Service Diesel 5 6” 265.0 kg x 5 182kg x 5 415.0 kg HPAC 2 2” 60.5 kg x 2 34kg x 2 53.0 kg LPAC 1 & 2 1 2” 60.5 kg 34kg 26.5 kg LPAC 3 1 2” 60.5 kg 34kg 26.5 kg R O Water makers 5 2” 60.5 kg 34kg 26.5 kg Total No. of Strainers & Weight Saving 27 6,100.5 kg

R J Mellor & Co Ltd

Application Areas

R J Mellor & Co Ltd

2" Hellan SH Strainer Zenon RO System Canadian Frigates LSD 36 Shaft Seal Installation JPG

Application Areas

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8" Hellan Strainer Fire Main Seawater USS Carrier JFK

Application Areas

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Application Areas

10" Hellan Strainer Fire Main Seawater USS Lasson

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Application Areas

8" Hellan Strainer Fire Main Seawater USS Lasson

R J Mellor & Co Ltd

8" Hellan Strainer Main Seawater CG-47 Class Cruiser

Application Areas

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Hellan Model 311 Fuel Oil Service Strainer Propulsion Fuel Carrier USS JFK

Application Areas

R J Mellor & Co Ltd

R J Mellor & Co Ltd

System Control Panels

The all metal enclosure to IP 65 and can be supplied to receive any input voltage with 110 / 24 volt control equipment. The panel controls the operation of the cleaning cycle which can be on time, or pressure monitored by a differential pressure transducer. The HMI access unit secured to the panel door, enables, once the password has been introduced, to change or modify the programme. R J Mellor & Co Ltd