Mining| Air Valve Series

All images in this catalog are for illustration only

BERMAD Mining700 Series

COMBINATION AIR VALVE Model MN-C50 (For Non-Clean Fluids)

BERMAD C50 is a high quality combination air valve for a variety of non-clean mining piping systems and operating conditions. It evacuates air during pipeline filling, allows e�cient release of air pockets from pressurized pipes, and enables large volume air intake in the event of network draining.

The elongated body and lower float prevent the fluid to be in contact with the upper mechanism.

With its advanced aerodynamic design, double orifice and Surge Protection device (optional), this valve provides excellent protection against air and gas accumulation and vacuum formation with improved sealing under low pressure conditions.

Features & Benefits■ Specially designed for non-clean (with suspended solids)

fluids used in mining such RAFF, ILS & PLS solutions for copper; cyanide barren and pregnant solutions for gold; seawater for desalination plants; slurry, pulp and concetrate lines.

■ Straight flow body with large diameter automatic orifice: Higher than usual air flow.

■ Aerodynamic, full-body kinetic shield: Prevents premature closing without disturbing air intake or discharge.

■ Dynamic Sealing: Prevents leakage under low pressure conditions (0.8 psi; 0.05 bar).

■ Elongated body design: Prevents solids from making contact with valve’s operating parts.

■ Compact, simple and reliable structure with fully corrosion-resistant internal parts: Lower maintenance and increased life span.

■ Two service ports: Enabling back flushing and drainage.■ Threaded Side outlet (2"; DN50) for connection of Surge

Protection (SP) or Inflow prevention (IP) devices.■ Factory approval and Quality Control: Performance and

specification tested and measured with specialized test bench, including vacuum pressure conditions.

Additional Features & Accessories■ Surge Protection: Anti-Slam feature for smoother operation,

preventing damage to the valve and the system. C50-SP■ Inflow Prevention: Prevents intake of atmospheric air in

cases where this could lead to damaged pumps, required re-priming, or disruption of siphon. C50-IP

■ Drainage Valve (code Z).

Typical Applications■ Pumping stations: Air relief, vacuum and surge protection.■ Pipelines: Protection against air accumulation and vacuum

formation at peaks and slope change points.■ Water hammer: protection against vacuum formation

during down-surge stage in systems affected by water hammer phenomena.

C50-P

C50-G C50-N

C50-CC50-J

Air Valve Series Mining|

i n f o @ b e r m a d . c o m • w w w . b e r m a d . c o mT h e i n f o r m a t i o n h e r e i n i s s u b j e c t t o c h a n g e w i t h o u t n o t i c e . B E R M A D s h a l l n o t b e h e l d l i a b l e f o r a n y e r r o r s . A l l r i g h t s r e s e r v e d . © C o p y r i g h t b y B E R M A D . PC7ME20 J a n u a r y 2 0 1 7

BERMAD Mining700 SeriesModel MN-720

Air Flow Performance Charts

Air relief and intake charts are based on actual measurements, measured in Bermad Air Flow test bench, according to EN-1074/4 standard and refer to Side outlet. Use Bermad Air software for optimized Sizing & Positioning of Air Valves.

Air Relief and Intake (Pipeline Filling, Draining and Vacuum Conditions) Air Release (Pressurized Operation)Air Flows (Normal cubic feet per minute - ncfm)

Pip

elin

e P

ress

ure

(bar

)

Pip

elin

e P

ress

ure

(PSI

)

Air Flow (normal cubic meter per hour - nm3/h)

20 40 60 80 100

0 20 40 80 100 120 140 160 18060

50

0

100

150

200

0

4

8

12

16

Air Flows (Normal cubic feet per minute - ncfm)

Pip

elin

e P

ress

ure

(bar

)

Pip

elin

e P

ress

ure

(PSI

)

Air Flow (normal cubic meter per hour - nm3/h)

2”, 3”, 4”

2”, 3”, 4”

-500 -400 -300 -200 -100 100 200 300 400 5000-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

-6

-4

-2

0

2

4

6-250 -200 -150 -100 -50 50 100 150 200 250 3000

2-4”

2-4”-SP

2-4”-IP

SP “2-4“2-4

IP “2-4

Operational Data■ Minimum operating pressure: 0.8 psi; 0.05 bar ■ Media and operating temperature: Water, 33-140°F; 1-60°C■ Available ourlet connection: sideway, female threaded 2"; DN50.

Inlet SizesAutomatic Orifice Kinetic Orifice Surge Protection

Area Diameter Area Number of holes Hole Diameter Total Area

Inch mm Sq inch Sq mm inch mm Sq inch Sq mm -- inch mm Sq inch Sq mm

2"-4" DN50-DN100 0.019 12.2 1.772 45.0 2.465 1,590 4 0.157 4 0.078 50

Orifice Specifications

Model C50-P C50-C C50-J C50-N C50-G

Max. Recommended Pressure 150 PSI (PN10) 250 PSI (PN16) 150 PSI (PN10) 250 PSI (PN16) 150 PSI (PN10)

Available Connection (inlet)

Flanged ANSI#150

Threaded NPT

Flanged ANSI#150

Threaded NPT

Flanged ANSI#150

Threaded NPT

Flanged ANSI#150

Threaded NPT

Flanged ANSI#150

Threaded NPT

Available Sizes (inlet) 2”-4” 2”-3” 2”-3” 2” 2”-3” 2” 2”-3” 2”-3” 2”-3” 2”-3”

Pressure Rating & Available Sizes and Connections

Main Components C50-P C50-C C50-J C50-N C50-G

Body Glass Reinforced Nylon Ductile Iron Ductile Iron Stainless Steel 316 Stainless Steel 316

Neck & Cover Glass Reinforced Nylon Ductile Iron Glass Reinforced Nylon Stainless Steel 316 Glass Reinforced Nylon

Upper Float Assembly

PolypropyleneGlass Reinforced Nylon

PolypropyleneGlass Reinforced Nylon

PolypropyleneGlass Reinforced Nylon Polypropylene Polypropylene

Glass Reinforced NylonLower Float Assembly

Polypropylene Stainless Steel 316 (Opt)

Polypropylene Stainless Steel 316 (Opt)

PolypropyleneStainless Steel 316 (Opt)

PolypropyleneStainless Steel 316 (Opt)

PolypropyleneStainless Steel 316 (Opt)

Float Rod Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316

Elastomers EPDM, NBR, Viton (Opt) EPDM, NBR, Viton (Opt) EPDM, NBR, Viton (Opt) Viton EPDM, NBR, Viton (Opt)

Coating Uncoated Fusion Bonded Epoxy Fusion Bonded Epoxy Uncoated Uncoated

Materials

Mining| Air Valve Series

All images in this catalog are for illustration only

BERMAD Mining700 Series

All images in this catalog are for illustration only

Male Threaded

Main Float

Float Rod

Shock Absorber

Washer

Spring

Cover

Top Float

Kinetic Orifice

Insect Screen

Dynamic Seal (Kinetic Orifice)

Peel Seal (Automatic Orifice)

Body

1 2 3

Female Threaded for retrofitting Surge Protection (Code SP) or

Inflow Prevention (Code IP) functions or drain lines

Automatic Orifice

Kinetic Plug

Cutaway - Glass-reinforced Nylon Body (C50-P)

Cutaway - Stainless Steel Body (C50-N)

Main Float

Float Rod

Spring

Cover

Shock Absorber

Top Float

Automatic OrificeKinetic Orifice

Dynamic Seal (Kinetic Orifice)Kinetic Plug

Peel Seal (Automatic Orifice)

Body

Male Threaded

Female Threaded for retrofitting Surge Protection (code SP) or

Inflow Prevention (code IP) functions or drain lines

Inflow Prevention (code C50-IP)

Surge Protection (code C50-SP)

1

Extension with downwards outlet

3

2

1 2 3

Air Valve Series Mining|

www.bermad.com© Copyright 2009-2019 Bermad CS Ltd. All Rights Reserved. The information contained in this document is subject to change without notice. BERMAD shall not be liable for any errors contained herein. PCAME-C50 February 2019

i n f o @ b e r m a d . c o m • w w w . b e r m a d . c o mT h e i n f o r m a t i o n h e r e i n i s s u b j e c t t o c h a n g e w i t h o u t n o t i c e . B E R M A D s h a l l n o t b e h e l d l i a b l e f o r a n y e r r o r s . A l l r i g h t s r e s e r v e d . © C o p y r i g h t b y B E R M A D . PC7ME20 J a n u a r y 2 0 1 7

BERMAD Mining700 SeriesModel MN-720

H

D

Glass ReinforcedNylon (C50-P)

Ductile Iron(C50-C)

Ductile Iron& GlassReinforced Nylon (C50-J)

InletSize

Connection

Width(D)

Height(H) Weight Width

(D)Height

(H) Weight Width(D)

Height(H) Weight

inch inch inch lbs inch inch lbs inch inch lbs

mm mm mm Kg mm mm Kg mm mm Kg

2"Threaded

13.622 18.031 12.8 14.488 19.291 45.2 13.740 19.252 26.4

DN50 346 458 5.8 368 490 20.5 349 489 12.0

2"Flanged

13.622 18.504 14.1 14.488 19.724 49.1 13.740 19.724 30.2

DN50 346 470 6.4 368 501 22.3 349 501 13.7

3"Threaded

13.622 18.031 13.0 --- --- --- --- --- ---

DN80 346 458 5.9 --- --- --- --- --- ---

3"Flanged

13.622 18.504 14.8 14.488 19.291 52.5 13.740 19.252 33.5

DN80 346 470 6.7 368 490 23.8 349 489 15.2

4"Flanged

13.622 18.504 15.3 --- --- --- --- --- ---

DN100 346 470 7.0 --- --- --- --- --- ---

H

D

Stainless Steel & GlassReinforced Nylon (C50-G)

Stainless Steel(C50-N)

InletSize

Connection

Width(D)

Height(H) Weight Width

(D)Height

(H) Weight

inch inch inch lbs inch inch lbs

mm mm mm Kg mm mm Kg

2"Threaded

13.622 19.213 23.4 13.661 19.252 37.0

DN50 346 488 10.6 347 489 16.8

2"Flanged

13.622 19.134 29.1 13.661 19.370 41.7

DN50 346 486 13.2 347 492 18.9

3"Threaded

13.622 20.197 28.7 13.661 20.197 41.9

DN80 346 513 13.0 347 513 19.0

3"Flanged

13.622 19.409 35.7 13.661 19.843 48.3

DN80 346 493 16.2 347 504 21.9

4"Flanged

13.622 19.409 41.2 13.661 19.843 49.4

DN100 346 493 18.7 347 504 22.4

Dimensions & Weights

* including assembled extension + 90 degrees elbow. For an addition of SP/IP device, add to the Width (D) 2.087"; 53mm

* including assembled extension + 90 degrees elbow. For an addition of SP/IP device, add to the Width (D) 2.087"; 53mm