Spirax Strainer[1]

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Forbes Marshall Forbes Marshall Arca Forbes Marshall Codel J N Marshall Krohne Marshall Spirax Marshall Forbes Vyncke

Engineered to perform. Built to last.

Spirax Strainers

For over six decades, Forbes Marshall

has been building steam engineering

and control instrumentation solutions

that work for process industry. Today

we have evolved into a leader in

process efficiency and energy

conservation through technology tie-

ups and focused investments in

manufacturing and research. Our joint

ventures with the world's leading

names enable us to deliver quality

solutions in 14 countries. Forbes

Marshall is probably the only company

in the world to have extensive

expertise in both steam and control

instrumentation. The dual expertise

has allowed us to engineer industry

specific systems that focus on energy

efficiency and utilities management for

sectors as diverse as textiles, food

processing, paper, power and

chemicals.

Our business practices and processes

have combined into a singular

philosophy of being trusted partners

who provide innovative solutions. It's a

philosophy we are proud to live up to.

Forbes Marshall began 60 years ago as

a company offering steam generation

solutions in association with Spirax

Sarco of the UK who are world

leaders in steam engineering and

energy conservation.

Today, Spirax Marshall itself ranks

amongst the five leading steam energy

conservation firms world-wide. We

offer the widest range of steam

engineering products in the industry:

steam traps and trap monitors,

condensate pumps and flash vessels,

pressure and temperature controls,

clean steam, heat-exchange solutions,

boiler-house products and meters,

manifolds and pipeline connectors,

piston valves and disc-check valves,

and all steam accessories. Our

products have provided the

benchmark for Indian process industry

for over 60 years.

Y-STRAINER

Engineered by Spirax Marshall using Computional Fluid Dynamics, these are ideally suited for steam and condensate. A correctly designed Y - strainer is necessary, as otherwise the pressure drop becomes high. Often a low priced strainer is a result of undersizing - thereby leading to high pressure drop and pre-mature failure.

Size : ½” to 12” : Cast carbon steel / Cast Iron / Stainless Steel

½ “ to 1.5” : Forged CS to ASTM A 105

2” to 24” :A106, A 234 Gr WPB, SS304, SS316

Higher sizes made to order.

Screen : Perforated plate with 3 mm, 8 mm perforations or as per requirement.

Mesh : Options from mesh size 6, 40, 80, 100, 200, 300

End Connections: SW, BW, Flanged to various standards, Screwed

Rating : ANSI #150, 300, 600, 900, 1500, 2500

Certifications : IBR / EN 10204 3.1.B/ EN 10204 2.2/NACE MR-01-75

Tests available : Radiography/100% X ray on Weld/Dye-Penetrant/ MPI/Impact Test and other tests as per ASTM/SHELL Standards

Service : Strainers for both sour/ non-sour Services and NACE/NON-NACE services available.

T-STRAINER

T-Type strainers are used to remove solids from flowing liquids and are ideally suited for process applications, water and utilities.

Size : 2”to 24”. Higher sizes - engineered and manufactured to order

Material options : ASTM A 106 Gr B/ API 5L Gr B / ASTM A 333 Gr 6 /WPL 6 / ASTM A 516 Gr 60/65/70 / ASTM 316/ (L) SS / ASTM A 234 Gr WPB.

Screen : Perforated plate with 3mm, 8mm or as per requirement.


End Connections : Flanged ANSI, DIN, BS ; But weld, SW as per ASME standards / eq.

Rating : ANSI Class 150,300,600 standards. Higher pressure ratings also available. DIN (Connection PN 16 thru PN250)

Mfg. Standards : ASME B 31.3, ASME B 31.1, IBR, Shell, EIL etc.




BASKET / BUCKET STRAINERS

Basket type strainers are widely used to remove foreign particles and debris from flowing liquids. They offer considerably lesser pressure drop than T- strainers and therefore ideal for liquid applications especially with higher amount of unwanted particles.

Size : 2” to 24”. Higher sizes - engineered and manufactured to order

Material options : ASTM A 106 Gr B/ API 5L Gr B / ASTM A 333 Gr 6 /WPL 6 / ASTM A 516 Gr 60/65/70 / ASTM 316/ (L) SS

Screen : Perforated plate with 3mm, 8mm perforations or as per requirements.


End Connections: Flanged ANSI, DIN, BS ; But weld, SW as per ASME standards / eq.

Rating : ANSI #150, 300, 600, 900, 1500, 2500




Flow Coefficient (CV) Valves

Size Cv

4” 200

6” 400

8” 575

12” 1850

14” 2700

16” 3850

18” 5500

20” 7450

24” 9750

30” 1400

Cv = Kv x 1.17

Above values are for T-type strainers

with 6 mesh (Approx 1/8” hole size)

perforations

Correction Factor

Refer table for finer mesh screens

that are backed with a perforated

sheet.

Cv Correction Factor Table

40 mesh x 0.833

60 mesh x 0.7

80 mesh x 0.625

100 mesh x 0.59

200 mesh x 0.51

300 mesh x 0.42

Pressure Drop / Flow Co-efficient

11355

9085

6810

4540

227020451815

1590

1362

1135

910

680

450

225205

180

160

135

113

90

68

45

222018

16

14

11

30"

24”

18"

16"

14"

12"

10"

8"

6"

4"

20"

3W

ate

r Fl

ow

(M

/hr)

6

13

20

25

33

40

45

53

60

66

13

5

20

0

26

5

33

3

40

0

46

65

30

60

06

65

Pressure Drop Graph - ‘T’ Strainer, 6 Mesh

PRESSURE DROP (millibar)

Pressure Drop Correction Factor

For finer mesh screens that are backed with a perforated sheet, multiply

the pressure drops shown above by the following

40 mesh x 1.2

60 mesh x 1.4

80 mesh x 1.6

100 mesh x 1.7

200 mesh x 2.05

300 mesh x 2.5

For 50% clogged condition, pressure drop shall be 2 times the above values

Pressure Drop Formula

2ms = 12 kv P 1-5.67 (0.42 -x)1

ms = Mass Flowrate

kv = Flow Co-efficient

x = Pressure Drop ratio P - P1 2

P1

P = Upstream pressure in bar absolute1

P = Down Stream pressure in bar absolute2

Equation can be re-arranged

DP = P 0.42 - 1 1

5.67[ ( 12 kv P1

1- ms 2 ({ { [

SEG

/SPE

S/0110/B

R-3

7/V

1.R

0

Y Type, T Type, Basket / Bucket type, Conical / temporary strainers

Extra Options available : Blowdown Cock, Blowdown Valve

WIDEST RANGE OF FORGED / CAST / FABRICATED STRAINERS

Spirax fabricated strainers are designed and manufactured with the latest standards and technology.

They offer unmatched product quality and workmanship. Typical manufacturing standards include ASME B 31.3B and ASME B 31.1.

IBR, Radiography,

Dye Penetrant

Impact Test

Standard : SS304 Screen

with 0.8 mm perforations

Optional : Screen with 3 mm,

8 mm perforations backing

Mesh : 40, 60, 100, 200, 300

Material : SS316, SS316L,

Monel as options

Cast / Forged Strainers

Fabricated Strainers

Model/Type Size Materials (Body) Ratings / End Conn. Screen Certification / Test Available

Fig 12 15-50mm CI; IS 210 Gr. FG 260 Screwed BSPT / NPT

Fig 14 15-50mm ASTM A 216-WCB, Screwed BSPT / NPTCF8, CF8M

Fig 32 40-300mm CI/upto 200mm Flanged BS 10 T 'F',ASTM A 216-Gr. WCB H J K R, ANSI 150, 300,

ASTM A 315-Gr. CF8, CF8M 600 DIN NO 10, 16, 25, 40

F600 15-40mm ASTM A 105 Screwed BSPT / NPT, SW, ASA150, 300 & 600 weld on Flange

Model/Type Size Materials (Body) Ratings / End Conn. Screen Certification Test Available

Fabricated

Y type

T type &

Basket

2” - 24” Std

>24”(made to order)

ASTM A 106 Gr BASTM A 516 Gr 70

API 5 L Gr B,ASTM A 333 Gr 6,

WPL6.

ASTM A 234 Gr WPB

ASTM A 312 TP 304ASTM A312, TP 316

ASTM A 240 Gr 316, 304

BW, SW

Flanged to ANSI #

150, 300,

600, 900

1500, 2500

Perforated ScreenSS304, SS316,

SS316Lmonel

3 mm, 8 mmperforations or as per

orderMesh : Size 6, 40, 80,

100, 200, 300

IBR

EN 10204 3.1.B

EN 10204 2.2

NACE MR-01-75

Radiography

100% X ray on Weld

Dye-Penetrant

MPI

Impact Test

Other tests as per ASTM/SHELL

Standards

www.forbesmarshall.com

Spirax Marshall Pvt. Ltd.Mumbai-Pune Road, Kasarwadi, Pune - 411 034. India.Tel.: 91(0)20 - 27145595, 39858555Fax: 91(0)20 - 27147413 E-mail: [email protected]

Domestic:Ahmedabad, Alibag, Bangalore, Bhopal / Indore, Chandigarh, Chennai, Coimbatore, Delhi, Hyderabad, Jamshedpur, Kolkata, Mumbai, Nagpur, Navi Mumbai, Surat, Trichy, Vadodara, Visakhapatanam

International Operations: [email protected], Canada, Egypt, Indonesia, Iran, Kenya, Malaysia, Nepal, Sri Lanka, Thailand, U.A.E. (Instrumentation) (Boilers & Boiler Accessories)USA,

Spirax Strainer[1]

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