bermad irrigation · 1099 855 450 450 740 320 370 820 467 740 358 386 1099 870 iso pn 10 ; 16 iso...

BERMAD IrrigationTechnical Specifications

Available Sizes & PatternsDN 40 - DN 500 - Y PatternDN 40 - DN 450 - AngleDN 600 - DN 800 - Globe

Connection StandardFlanged: ISO 7005-2 (ISO 10, 16 & 25)Threaded: BSP (Rp ISO 7/1) or NPT (DN 40 - DN 80)

Water TemperatureUp to 80ºC

Working pressureISO PN 16: 16 barISO PN 25: 25 bar

Standard Materials❑ Main valve body and cover

Ductile Iron to EN 1563❑ Main valve internals

Stainless Steel, Bronze & Epoxy coated Steel❑ Control Trim

Brass, Bronze accessoriesStainless Steel 316 fittings & tubingor forged Brass fittings & Copper tubing

❑ ElastomersNBR

❑ CoatingBlue fusion bonded Epoxy

Optional Materials❑ Main valve body and cover

Carbon Steel to EN 10083-1Stainless Steel 316 to EN 10088-1Nickel Aluminum Bronze to BS-EN 1400 AB-2Other materials on request

❑ Control TrimStainless Steel 316, Nickel Aluminum Bronze,Hastalloy C-276 accessoriesMonel fittings & tubing

❑ ElastomersEPDMFPM

Available Sizes & PatternsDN 40 - DN 500 - Y PatternDN 40 - DN 450 - Angle

Connection StandardFlanged: ISO 7005-1(ISO 10, 16, 25 & 40)

Water TemperatureUp to 80ºC

Working pressureISO PN 16: 16 barISO PN 25: 25 barISO PN 40: 40 bar

Standard Materials❑ Main valve body

Carbon Steel to EN 10083-1❑ Valve cover (piston cylinder)

Stainless Steel or Bronze❑ Main valve internals

Stainless Steel and Bronze❑ Control Trim

Brass, Bronze accessoriesStainless Steel 316 fittings & tubingor forged Brass fittings & copper tubing

❑ ElastomersNBR


Optional Materials❑ Main valve body and Cover

Ductile Iron to EN 1563Stainless Steel 316 to EN 10088-1Nickel Aluminum Bronze to BS-EN 1400 AB-2Other materials on request



SI 700 Metric SI 800 Metric

The information herein is subject to change without notice. BERMAD shall not be held liable forany errors. All rights reserved. © Copyright by BERMAD. PC7XE01-04 05

i n f o @ b e r m a d . c o m • w w w . b e r m a d . c o m

WW-700 & 800 Series

BERMAD IrrigationDimensions & Weights

Angle Pattern

W

H

h

LR

4012415578852279.5124165788522711

50124155838522710124165858522711.5

6514917895109251121491859510925113.5

8015220010010228121.515920710510928723

1001902221151273423520025012713535041

1502253201431524417123432015916545481

200265390172203545118277390191216558138

250320480204219633205336480223236649233

300396550248273777350415550261294796390

350400550264279781370419550293299801425

40045074029936910828004677403253861099855

45045074032037010828204677403583861099870

ISO

PN 10

; 16

ISO

PN 20

; 25

mmLWRhH

Weight (Kg)LWRhH

Weight (Kg)

Angle Pattern

H

LR

h

W

501211224083

2255.5

65140122481022427

801591635511529415

BSP

; NPT

mmLWRhH

Weight (Kg)

Threaded

Flanged

Y Pattern

H

h

L

W

40205155782399.12051557823910

502101658324410.62101658324412.2

6522217895257132221859525715

802502001003052226420710531425

1003202231153663733525012737843

1504153201434927543332015950885

200500390172584125524390191602146

250605480204724217637480223742245

300725550242840370762550261859410

350733550268866381767570295893434

400990740300110884610247403251133900

4501000740319112794510307403571165967

5001100740358116796211367503891197986

ISO

PN 10

; 16

ISO

PN 20

; 25

mmLWhH

Weight (Kg)LWhH

Weight (Kg)

SI 700 Metric

Length according to EN 558-1

W

L

H

h

Globe Pattern 60014501250470

1965325015001250470

19653500

70016501250490198537001650125049019853700

75017501250520201539001750125052020153900

80018501250553204841001850125055320484100

ISO

PN 10

; 16

ISO

PN 20

; 25

mmLWhH

Weight (Kg)LWhH

Weight (Kg)

Y Pattern

L

W

H

BSP

; NPT

h

40155122

402015.5

50155122

402025.5

65212122

482098

80250163

5626417

mmLW

hH

Weight (Kg)

Y Pattern - Length according to EN 558-1DNLWhH

Weight (Kg)LWhH

Weight (Kg)

5023016582.52449.723016582.52449.7

803102001003052131020010030521

1003502351183693135023511836931

1504803201505007048032015050070

200600390180592115600390180592115

250730480213733198730480213733198

300850550243841337850550243841337



WW-700 Series


Flanged

Y Pattern

H

h

L

W

5023016582.52449.723016582.52449.7

803102001003052131020010030521

1003502351183693135023511836931

1504803201505007048032015050070

200600390180592115600390180592115

250730480213733198730480213733198

300850550243841337850550243841337

PN

10;

16

PN

25

DNL*WhH

Weight (Kg)L*WhH

Weight (Kg)

Angle Pattern

W

H

h

LR

4012415578852279.5124165788522711

50124155838522710124165858522711.5

6514917895109251121491859510925113.5

8015220010010228121.515920710510928723

1001902221151273423520025012713535041

1502253201431524417123432015916545481

200265390172203545118277390191216558138

250320480204219633205336480223236649233

300396550248273777350415550261294796390

350400550264279781370419550293299801425

40045074029936910828004677403253861099855

45045074032037010828204677403583861099870

PN

10

; 16

PN

25

DNLWRhH

Weight (Kg)LWRhH

Weight (Kg)

Angle Pattern

H

LR

h

W

5012112240832255.5

65140122481022427

801591635511529415

BS

P ;

NP

T

DNLWRhH

Weight (Kg)

Y Pattern

L

W

H

Threaded

BS

P ;

NP

T

DNLW

hH

Weight (Kg)

h

40155122

402015.5

50155122

402025.5

65212122

482098

80250163

5626417

* Length according to EN 558-1.

W

L

H

h

G Pattern 60014501250470

1965325015001250470

19653500

70016501250490198537001650125049019853700

75017501250520201539001750125052020153900

80018501250553204841001850125055320484100

PN

10

; 16

PN

25

DNL*WhH

Weight (Kg)LWhH

Weight (Kg)

40205155782399.12051557823910

6522219095257132221909525715

350733550268866381767570295893434

400990740300110884610247403251133900

4501000740319112794510307403571165967

5001100740358116796211367503891197986

DNLWhH

Weight (Kg)LWhH

Weight (Kg)

502101658324410.62101658324412.2

802502001003052226421010531425

1003202291153663733525412737843

1504153201434927543332015950885

200500390172584125524390191602146

250605480204724217637480223742245

300725550242840370762550261859410

On request (Y Pattern)

* Length according to EN 558-1for DN 50, 80, 100, 150, 200, 250 & 300.

SI 700 Metric European Standard (EN 558-1)



WW-700 Series

BERMAD Irrigation



Dimensions & Weights

0.125 0.3 0.45 2.15 4.5 8.5 12.4 29.9 98.0

0.04 0.12 0.3 1.1 2.3 4.0 8.0 18.7 -

SI 700 & 800 Metric

Control Chamber Displacement Volume (liter)

DN 40-65 80 100 150 200 250 300-350 400-500 600-800

700 Series

800 Series

Angle Pattern 401241567885

252N/A10.71241507885

252N/A11.8

501241668385252N/A131241558585264N/A15

6514919095109271N/A1614919095109271N/A18.4

80152200100102308N/A26159200105109315N/A30

100190229115127390N/A46200254127135398N/A54

15022528514315247614190234318159165491141101

200265344172203619141153277381191216632136179

250320408204219717156259336446223236733156292

300396496248273911156433415522261294930156481

350400528264279915156459419586293299935156523

400450598299369114419595046765032538611601951017

4504506403203701144195102046771635838611601951051

ISO

PN 10

; 16

ISO

PN 25

; 40*

mmLWRhHP

Weight (Kg)LWRhHP

Weight (Kg)

W

P

H

h

LR

SI 800 Metric

Y Pattern

L

ISO

PN 10

; 16

ISO

PN 25

; 40*

4020515678260N/A10.720515678260N/A11.8

5021016683265N/A1321016683265N/A15

6522219095278N/A1622219095278N/A18.4

80250200100327N/A28264210105332N/A32

100320229115409N/A48335254127422N/A56

15041528614352613594433318159542135106

200500344172650135162524382191666130190

250605408204763142272637446223783142307

300725484242942154455762522261961154505

350733536268969154482767590295996154549

40099060030011541911000102465032511791911070

450100063831911731911074103071435712081911095

50011007163581211191109611367783891241N/A

1129

H

h

P

W

mmLWhHP

Weight (Kg)LWhHP

Weight (Kg)

WW-700 & 800 Series

BERMAD Irrigation

The information herein is subject to change without notice. BERMAD shall not be held liable forany errors. All rights reserved. © Copyright by BERMAD.


Flow Charts

SI Metric

Y Pattern, Throttling Plug (U-Type)

Flow Rate - m3/h (Water)

Pre

ssur

e Lo

ss -

bar

0.05

0.1

1.0

10 100 1,000 10,000

0.5

50 500 5,000

500

40 65

50

80 100 150 200 250 300 350 450

400

Y Pattern, Flat Disk

Pre

ssur

e Lo

ss -

bar 500

100 150 200 250 300 350 450 600 700750800400

65

50

8040


0.1

1.0

10 100 1,000 10,000

0.5

50 500 5,000

0.05

WW-700 & 800 Series

BERMAD Irrigation



WW-700 & 800 SeriesFlow Charts

Angle Pattern, Throttling Plug (U-Type)

SI Metric

Pre

ssur

e Lo

ss -

bar

0.05

0.1

1.0

10 100 1,000 10,000

0.5

50 500 5,000

65

50

250 300 350 450

400

40 80 100 150 200


Angle Pattern, Flat Disk

Pre

ssur

e Lo

ss -

bar

0.05

65

50

80 100 150 200 250 300 350 450

400

40

0.1

1.0

10 100 1,000 10,000

0.5

50 500 5,000Flow Rate - m3/h (Water)

BERMAD IrrigationFlow Properties

mm 600 700 750 800Kv 7,350 7,500 7,500 7,500K 3.8 6.7 8.8 11.4Leq - m 188.0 390.1 550.9 760.7

G-PatternFlat Disk

SI Metric

mm 40 50 65 80 100 150 200 250 300 350 400 450 500Kv 42 50 55 115 200 460 815 1,250 1,850 1,990 3,310 3,430 3,550K 2.3 3.9 9.2 4.9 3.9 3.7 3.8 3.9 3.7 5.9 3.7 5.5 7.8Leq - m 4.3 10.3 33.4 21.6 23.0 37.5 53.9 70.0 85.6 159.9 112.7 204.8 323.8Kv 36 43 47 98 170 391 693 1,063 1,573 1,692 2,814 2,916 3,018K 3.1 5.4 12.8 6.7 5.4 5.2 5.2 5.4 5.1 8.2 5.1 7.6 10.8Leq - m 6.0 14.3 46.2 29.9 31.9 51.9 74.6 96.8 118.4 221.3 155.9 283.5 448.1Kv 46 55 61 127 220 506 897 1,375 2,035 2,189 3,641 3,773 NAK 1.9 3.2 7.6 4.0 3.2 3.1 3.1 3.2 3.1 4.9 3.0 4.5 NALeq - m 3.6 8.5 27.6 17.8 19.0 31.0 44.6 57.8 70.7 132.1 93.1 169.3 NAKv 39 47 51 108 187 430 762 1,169 1,730 1,861 3,095 3,207 NAK 2.6 4.5 10.6 5.6 4.5 4.3 4.3 4.5 4.2 6.8 4.2 6.2 NALeq - m 5.0 11.8 38.2 24.7 26.4 42.9 61.7 80.0 97.9 182.9 128.9 234.3 NA

Y-PatternFlat Disk

Y-PatternU-Plug

Angle PatternFlat Disk

Angle PatternU-Plug

SI Metric

Where:Kv = Valve flow coefficient (flow in m3/h at 1bar Diff. Press.)Cv = Valve flow coefficient (flow in gpm at Diff. Press. 1psi)Q = Flow rate (m3/h ; gpm)∆P = Differential pressure (bar ; psi)Gf = Liquid specific gravity (Water = 1.0)

Valve flow coefficient, Kv or Cv Kv(Cv)=Q Gf

∆P

Cv = 1.155 Kv

Where:K = Flow resistance or Head loss coefficient (dimensionless)∆H = Head loss (m ; feet)V = Nominal size flow velocity (m/sec ; feet/sec.)g = Acceleration of gravity (9.81 m/sec2 ; 32.18 feet/sec2)

K = ∆H2gV2

Flow resistance or Head loss coefficient,

Equivalent Pipe Length, Leq

Where:Leq= Equivalent nominal pipe length (m ; feet)Lk = Equivalent length coefficient for turbulent flow in clean

commercial steel pipe (SCH 40)D = Nominal pipe diameter (m ; feet)

Note:The Leq values given are for general consideration only.Actual Leq may vary somewhat with each of the valve sizes.

Leq = Lk·D



WW-700 & 800 Series

BERMAD Irrigation



Cavitation

SI Metric

The cavitation phenomenon has a significant affect on controlvalve and system performance.Cavitation may damage the valve and piping by the affectsof erosion and vibration. Cavitation also generates noise andmay limit and ultimately choke the flow.As the pressure differential across the valve increases, thestatic pressure of the flow passing through the throttling areaof the valve (Vena Contracta) drops sharply.When the fluid's static pressure reaches liquid vapor pressure,vapor cavities (bubbles) form and grow until they violentlyimplode by the recovered pressure downstream to the valveseat.The implosion of these cavities generates high-pressuresurges, micro jets and intensive heat, which erode valvecomponents and downstream piping. In its final stage,cavitation flashes and chokes the flow.The above Cavitation Guides for Bermad 700 Series valvesare based on the formula commonly used in the valve industry:

= (P2-Pv) / (P1-P2)

Where:

= Sigma, cavitation index, dimensionlessP1 = Upstream pressure, absoluteP2 = Downstream pressure, absolutePv = Liquid vapor pressure, absolute

(Water, 18ºC = 0.02 bar-a) ; 65ºF = 0.3 psi-a)

Use these guides and your applications upstream anddownstream pressures to determine whether their intersectionlies in or out of the cavitation damage zone.Considerations to avoid cavitation damage:A) Reduce system pressure in stages designing each pressure

stage to be above cavitation conditions.B) Consider using other valve selection criteria

a. Valve body and plug typeb. Valve sizec. Valve material

Notes:1. An alternate cavitation index formula introduced by ISA is:

ISA = (P1-Pv) / (P1-P2) which equals +12. The above charts should be considered only as a general

guide.3. For optimum system and control valve application please

consult Bermad.

Cavitation

Cavitation Guide

Upstream pressure - bar

Do

wns

trea

m p

ress

ure

- b

ar

CavitationDamage Zone

Flat Disk

V-Port Plug

8

7

6

5

4

3

2

1

00 2 4 6 8 10 12 14 16 18 20 22 24

WW-700 & 800 Series

BERMAD Irrigation

Available Sizes & Patterns11/2” - 20” - Y Pattern11/2” - 18” - Angle24” - 32” - Globe

Connection StandardFlanged: ANSI B16.42 (Ductile Iron)Threaded: NPT or BSP (11/2” -3”)

Water TemperatureUp to 180ºF

Working pressureClass #150: 250 psiClass #300: 400 psi

Standard Materials❑ Main valve body and cover

Ductile Iron to ASTM A-536❑ Main valve internals

Stainless Steel, Bronze & Epoxy coated Steel❑ Control Trim


❑ ElastomersNBR


Optional Materials❑ Main valve body and cover

Carbon Steel to ASTM A-216-WCBStainless Steel 316 to ASTM A-743 CF8MNickel Aluminum Bronze to ASTM B-148 C 95800Other materials on request



Available Sizes & Patterns11/2” - 20” - Y Pattern11/2” - 18” - Angle

Connection StandardFlanged: ANSI B16.5 (Cast steel)

Water TemperatureUp to 180ºF

Working pressureClass #150: 250 psiClass #300: 400 psiClass #400: 600 psi

Standard Materials❑ Main valve body

Carbon Steel to ASTM A-216-WCB❑ Valve cover (piston cylinder)

Stainless Steel or Bronze❑ Main valve internals

Stainless Steel and Bronze❑ Control Trim


❑ ElastomersNBR


Optional Materials❑ Main valve body and Cover

Ductile Iron to ASTM A-536Stainless Steel 316 to ASTM A-743 CF8MNickel Aluminum Bronze to ASTM B-148 C 95800Other materials on request



US 700 English US 800 English

Technical Specifications



WW-700 & 800 Series


US 700 English

Flanged

Y Pattern 11/2”8.16.13.19.4208.16.13.19.422

2”8.16.13.39.6238.36.53.39.627

21/2”8.37.03.710.1298.77.33.710.133

3”9.87.93.912.049

10.48.14.112.455

4”12.68.84.514.482

13.29.85.014.995

6”16.312.65.619.416517.012.66.320.0187

8”19.715.46.823.027620.615.47.523.7322

10”23.818.98.028.547825.118.98.829.2540

12”28.521.79.533.181630.021.710.333.8904

14”28.921.710.634.184030.222.411.635.2957

16”39.029.111.843.6186540.329.112.844.61984

18”39.429.112.644.4208340.529.114.145.92132

20”43.329.114.145.9212144.729.515.347.12174

ANSI

125 ;

150

ANSI

250 ;

300

inchLWhH

Weight (lb)LWhH

Weight (lb)

H

h

L

W

W

L

H

h

Globe Pattern 24”5749

18.577

71505949

18.577

7700

28”65491978

814065491978

8140

30”7049

20.579.385807049

20.579.38580

32”7349

21.880.690207349

21.880.69020

ANSI

125 ;

150

ANSI

250 ;

300

inchLWhH

Weight (lb)LWhH

Weight (lb)

Threaded

Angle Pattern 11/2”4.96.13.13.38.9214.96.53.13.38.924

2”4.96.13.33.38.9224.96.53.33.38.925

21/2”5.97.03.74.39.9275.97.33.74.39.930

3”6.07.93.94.011.1476.38.14.14.311.351

4”7.58.74.55.013.5777.99.85.05.313.890

6”8.912.65.66.017.41579.212.66.36.517.9179

8”10.415.46.88.021.526010.915.47.58.522.0304

10”12.618.98.08.624.945213.218.98.89.325.6514

12”15.621.79.810.730.677216.321.710.311.631.3860

14”15.721.710.411.030.781616.521.711.511.831.5937

16”17.729.111.814.542.6176418.429.112.815.243.31885

18”17.729.112.614.542.6180818.429.114

15.243.31918

ANSI

125 ;

150

ANSI

250 ;

300

inchLWRhH

Weight (lb)LWRhH

Weight (lb)W

H

h

LR

Angle Pattern 2”4.84.81.63.38.912

21/2”5.54.81.94.09.515

3”6.36.42.24.511.633

BSP

; NPT

inchLWRhH

Weight (lb)

H

LR

h

W

Y Pattern 11/2”6.14.8

1.67.912

2”6.14.8

1.68.012

21/2”8.34.8

8.28.218

3”9.86.4

2.210.437

BSP

; NPT

inchLW

hH

Weight (lb)L

W

H

h



WW-700 Series

BERMAD Irrigation

US 800 English

Y Pattern

L

ANSI

150

ANSI

300

11/2”8.16.13.1

10.2N/A248.16.13.1

10.2N/A26

2”8.16.13.310.4N/A298.36.53.310.4N/A33

21/2”8.37.03.710.9N/A358.77.33.710.9N/A40

3”9.87.93.912.9N/A62

10.48.14.113.1N/A70

4”12.68.84.516.1N/A10613.29.85.016.6N/A123

6”16.312.65.620.75.320717.012.66.321.35.3233

8”19.715.46.825.65.335620.615.47.526.25.3418

10”23.818.98.0305.659825.118.98.830.85.6675

12”28.521.79.537.16.1

100130.021.710.337.86.1

1111

14”28.921.710.638.16.1

106030.222.411.639.26.1

1208

16”39.029.111.845.47.5

220040.329.112.846.47.5

2354

18”39.429.112.646.27.5

236340.529.114.147.67.5

2409

20”43.329.114.147.77.5

241144.729.515.348.97.5

2484

inchLWhHP

Weight (lb)LWhHP

Weight (lb)

H

h

P

W

Angle Pattern 11/2”4.96.13.13.39.9N/A244.96.53.13.39.9N/A26

2”4.96.13.33.310.4N/A294.96.53.33.310.4N/A33

21/2”5.97.03.74.310.7N/A355.97.33.74.310.7N/A40

3”6.07.93.94.012.1N/A576.38.14.14.312.4N/A66

4”7.58.74.55.015.4N/A1017.99.85.05.315.7N/A119

6”8.912.65.66.018.75.61989.212.66.36.519.35.6222

8”10.415.46.88.024.45.633710.915.47.58.524.925.6394

10”12.618.98.08.628.26.157013.218.98.89.328.96.1642

12”15.621.79.810.735.96.195316.321.710.311.636.66.1

1058

14”15.721.710.411.036.06.1

101016.521.711.511.836.86.1

1151

16”17.729.111.814.545.07.7

209018.429.112.815.245.77.7

2237

18”17.729.112.614.545.07.7

224418.429.114

15.245.77.7

2312

ANSI

150

ANSI

300

inchLWRhHP

Weight (lb)LWRhHP

Weight (lb)

W

P

H

h

LR

US 700 & 800 English

Control Chamber Displacement Volume (gallon)

Sizes 11/2”-21/2” 3” 4” 6” 8” 10” 12”-14” 16”-20” 24”-32”

0.04 0.08 0.12 0.57 1.19 2.25 3.28 7.88 25.9

0.01 0.03 0.08 0.29 0.61 1.06 2.12 4.95 -

700 Series

800 Series

Dimensions & Weights



WW-700 & 800 Series

BERMAD Irrigation

Y Pattern, Throttling Plug (U-Type)

1

10

15

5

Pre

ssur

e Lo

ss -

psi

10 100 1,000 10,000 100,00050 500 5,000 50,000

3” 4” 6” 8” 18”

12”

11/2”

2”

21/2”

14”

16”

20”

10”

Flow Rate - gpm (Water)

US English

Y Pattern, Flat Disk

1

10

15

5

Pre

ssur

e Lo

ss -

psi

10 100 1,000 10,000 100,00050 500 5,000 50,000

10”

24”

3” 4” 6” 8” 18”

12”

11/2”

2”

21/2”

14”

16”

20”

28”30”32”




Flow Charts WW-700 & 800 Series

BERMAD Irrigation

Angle Pattern, Flat Disk

1

10

15

5

Pre

ssur

e Lo

ss -

psi

10 100 1,000 10,000 100,00050 500 5,000 50,000

12”

3” 4” 6” 8” 18”11/2”

2”

21/2”

14”

16”10”


US English

Angle Pattern, Throttling Plug (U-Type)

1

10

15

5

Pre

ssur

e Lo

ss -

psi

10 100 1,000 10,000 100,00050 500 5,000 50,000

3” 4” 6” 8” 18”

12”

11/2”

2”

21/2”

14”

16”10”


Flow Charts



WW-700 & 800 Series

BERMAD Irrigation



Flow Properties

US English

inch 1.5" 2" 2.5" 3" 4" 6" 8" 10" 12" 14" 16" 18" 20"Cv 49 58 64 133 230 530 940 1,440 2,140 2,300 3,820 3,960 4,100K 2.3 3.9 9.2 4.9 3.9 3.7 3.8 3.9 3.7 5.9 3.7 5.5 7.8Leq-feet 14.2 33.8 109.5 70.8 75.6 123.0 176.9 229.5 280.8 524.5 369.6 671.9 1,062.3Cv 41 49 54 113 200 450 800 1,230 1,820 1,950 3,250 3,370 3,490K 3.1 5.4 12.8 6.7 5.4 5.2 5.2 5.4 5.1 8.2 5.1 7.6 10.8Leq-feet 19.7 46.8 151.6 97.9 104.6 170.2 244.8 317.6 388.6 725.9 511.6 930.0 1,470.3Cv 53 64 70 146 250 580 1,040 1,590 2,350 2,530 4,210 4,360 NAK 1.9 3.2 7.6 4.0 3.2 3.1 3.1 3.2 3.1 4.9 3.0 4.5 NALeq-feet 11.7 28.0 90.5 58.5 62.5 101.6 146.2 189.7 232.0 433.4 305.5 555.3 NACv 45 54 59 124 220 500 880 1,350 2,000 2,150 3,580 3,710 NAK 2.6 4.5 10.6 5.6 4.5 4.3 4.3 4.5 4.2 6.8 4.2 6.2 NALeq-feet 16.3 38.7 125.3 80.9 86.5 140.7 202.4 262.5 321.2 599.9 422.8 768.6 NA

Y-PatternFlat Disk

Y-PatternU-Plug

Angle PatternFlat Disk

Angle PatternU-Plug

Where:Kv = Valve flow coefficient (flow in m3/h at 1bar Diff. Press.)Cv = Valve flow coefficient (flow in gpm at Diff. Press. 1psi)Q = Flow rate (m3/h ; gpm)∆P = Differential pressure (bar ; psi)Gf = Liquid specific gravity (Water = 1.0)

Valve flow coefficient, Kv or Cv Kv(Cv)=Q Gf

∆P

Cv = 1.155 Kv

Where:K = Flow resistance or Head loss coefficient (dimensionless)∆H = Head loss (m ; feet)V = Nominal size flow velocity (m/sec ; feet/sec.)g = Acceleration of gravity (9.81 m/sec2 ; 32.18 feet/sec2)

K = ∆H2gV2

Flow resistance or Head loss coefficient,

Equivalent Pipe Length, Leq

Where:Leq= Equivalent nominal pipe length (m ; feet)Lk = Equivalent length coefficient for turbulent flow in clean

commercial steel pipe (SCH 40)D = Nominal pipe diameter (m ; feet)

Note:The Leq values given are for general consideration only.Actual Leq may vary somewhat with each of the valve sizes.

Leq = Lk·D

inch 24" 28" 30" 32"Cv 8,490 8,670 8,670 8,670K 3.8 6.7 8.8 11.4Leq-feet 616.6 1,280.0 1,807.3 2,495.6

G-PatternFlat Disk

EnglishUS

WW-700 & 800 Series

BERMAD Irrigation



The cavitation phenomenon has a significant affect on controlvalve and system performance.Cavitation may damage the valve and piping by the affectsof erosion and vibration. Cavitation also generates noise andmay limit and ultimately choke the flow.As the pressure differential across the valve increases, thestatic pressure of the flow passing through the throttling areaof the valve (Vena Contracta) drops sharply.When the fluid's static pressure reaches liquid vapor pressure,vapor cavities (bubbles) form and grow until they violentlyimplode by the recovered pressure downstream to the valveseat.The implosion of these cavities generates high-pressuresurges, micro jets and intensive heat, which erode valvecomponents and downstream piping. In its final stage,cavitation flashes and chokes the flow.The above Cavitation Guides for Bermad 700 Series valvesare based on the formula commonly used in the valve industry:

= (P2-Pv) / (P1-P2)

Where:

= Sigma, cavitation index, dimensionlessP1 = Upstream pressure, absoluteP2 = Downstream pressure, absolutePv = Liquid vapor pressure, absolute

(Water, 18ºC = 0.02 bar-a) ; 65ºF = 0.3 psi-a)

Use these guides and your applications upstream anddownstream pressures to determine whether their intersectionlies in or out of the cavitation damage zone.Considerations to avoid cavitation damage:A) Reduce system pressure in stages designing each pressure

stage to be above cavitation conditions.B) Consider using other valve selection criteria

a. Valve body and plug typeb. Valve sizec. Valve material

Notes:1. An alternate cavitation index formula introduced by ISA is:

ISA = (P1-Pv) / (P1-P2) which equals +12. The above charts should be considered only as a general

guide.3. For optimum system and control valve application please

consult Bermad.

Cavitation

USCavitation Guide

Upstream pressure - psi

Do

wn

str

eam

pre

ssu

re -

psi

120

100

80

60

40

30

20

10

0

110

90

70

50

CavitationDamage Zone

Flat Disk

V-Port Plug

0 30 60 90 120 150 180 210 240 270 300 330 360

English

Cavitation WW-700 & 800 Series

BERMAD Irrigation

For spare parts ordering, Please use BERMAD “Spare Parts Ordering Guide”

Lifting eye nut

Cover bolt & disk

Indicator nutShaft nut

Diaphragm washer

Diaphragm

Spacer disk

Shaft

Cover nut & disk

Spring

O-ring

Seal disk

Seal disk nut

Shaft locking screwSeal

Seal disk washer

Seat screw

SeatValve body

Control boss

Drain

Cover plug

O-ring

Cover

Bearing screw

V-Port throttling plug (U-shape) - option

Control boss

Bearing diskO-ring

Bearing

O-rings

Diaphragm washer

Separating partition

Lifting eye bolt

Stud

Seal disk screws

Nut & disk

700 Valve - Exploded View



WW-700 Series

For spare parts ordering, Please use BERMAD “Spare Parts Ordering Guide”

Lifting eye nut

Cover bolt

Indicator nut

Shaft nut

O-ring

Seal disk

Seal disk nut

Shaft locking screw

Seal

Seal disk washer

Seat screw

SeatValve body

Controlboss

Drain

Cover plug

O-ring

Cover / Cylinder

Bearing screws

V-Port throttling plug (U-shape) - option

Control boss

Bearing

Separating partition

Seal disk screws

Nut & disk

Lifting eye bolt

O-rings

O-ring

DiskPiston seal

Piston

Shaft

BERMAD Irrigation



800 Valve - Exploded View WW-800 Series

BERMAD IrrigationPressure Rating

Standard Operation Pressure – Materials Data

End Connections Standards / Pressure Ratings / Materials / Max. Operating Pressure

+ Available, Not required by the standard pressure class– Not available

* External flange diameter might vary then the standard.Can be used in 800 series only.

BermadCode

10 or E116 or E625 or E5

40A5A3A4BDBHJ1J6J2J3B1B6B2

BPPHNPNH

EndConnections

Standard

I S OI S OI S OI S O

A N S IA N S IA N S IBS 10BS 10J I SJ I SJ I SJ I S

A B N TA B N TA B N TThreads

B S P (Rp ISO 7/1)B S P (Rp ISO 7/1)

N P TN P T

PressureClass

PN 10PN 16PN 25

PN 40 *# 150# 300

# 400 *Table DTable H

10 K16 K20 K

30 K *101625

Nickel aluminumbronze to

ASTM B-148 C 95800or BS-EN 1400 AB-2

+16 bar25 bar

–250 psi400 psi

–+

400 psi+

27 bar28 bar

–+

16 bar25 bar

25 bar

400 psi

Ductile iron toASTM A-536or EN 1563

++

25 bar–

250 psi400 psi

–+

400 psi+

27 bar28 bar

–++

25 bar

25 bar

400 psi

Carbon steel toASTM A-216-WCB

or EN 10083-1

++

25 bar40 bar285 psi400 psi600 psi

+400 psi

+27 bar28 bar40 bar

++

25 bar

25 bar

400 psi

Stainless steel 316to ASTM A-743 CF8M

or EN 10088-1

++

25 bar40 bar285 psi400 psi600 psi

+400 psi

+27 bar28 bar40 bar

++

25 bar

25 bar

400 psi



WW-700 & 800 Series

BERMAD Irrigation

Flo

w -

m3 /

h

Typical Pressure Reducing Performance ChartActual Hydraulic Laboratory Results

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

00 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200

700

600

500

400

300

200

100

0

Time - sec

Pre

ssur

e -

bar Upstream Press.

Flow Rate

Downstream Press.

Valve Plugs CharacteristicsKv ; Cv to Valve Opening Chart

Kv ; Cv %

Valv

e Tr

avel

%

0

10

20

30

40

50

60

70

80

90

100

0 10 20 30 40 50 60 70 80 90 100

Flat Disk

V-Port Plug (U

-Shape)



WW-700 & 800 Series

bermad irrigation · 1099 855 450 450 740 320 370 820 467 740 358 386 1099 870 iso pn 10 ; 16 iso...

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