Ball Check CAtalog

8/12/2019 Ball Check CAtalog

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1/27/2014 Ball Type Check Valves, Non-Return Valves, Ball Type Non-Return Valves, Check Valves, Low Pressure Check Valves, Wafer Type Check Valves, india

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Ball Type Check Valves

Normex Standard Ball NRV B - 01

Check Valve - Ball type (non-return valve) was the first valves at Normex with a unique design. A very

simple but robust design with no critical mechanism involved. All parts like hinge-pin-disc mechanism

used in conventional valve are eliminated, and Normex has put in a reinforced rubber coated ball to arrest

flow media in return condition. This ball, moves totally out of the flow path when the pumping is on to give

minimum head losses. The spherical rubber coated ball seals perfectly on the rounded valve seatensuringa totally leak proof sealing. This design offers other advantages like non-clogging & self cleaning.

In this virtually maintenance free valves, if required, after prolonged usage, the on-line replacement of the

ball is just a minute job.

n Lower power consumption

n Larger solid handling capacity

n Self cleaning, Non-Clogging

n Perfect Sealing

n Low pressure drop

Ball Check Valves ( Flanged ) - Model B - 01

Materials :Body & Cover: C I (GG25)Ball : Nitrile rubber coatedSeat : Leaded Tin BronzeOther materialson request

Sizes :25 to 350 NBPressure rating :25to 125NB: PN1.6150 to 300 NB: PN 1.0350 NB : PN 0.6( For CI Construction. )

Installation : Vertical / Horizontal

Normex Ball Non Return Valves

Principle:
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Part Description Standard Special

1. Body Cast Iron St. Steel, CastSteel

2. Cover Cast Iron St. Steel, Cast

Steel

3. Ball Nitrile

Reinforced

EPDM, Neoprene

4. Cover Ring Nitrile Rubber Butyle, Viton

5. Ball Seat

Ring

L. T. Bronze St. Steel, Hard

Rub.

6. Fasteners Carbon Steel St. Steel

The heart of this valve is a reinforced rubber ball. The unique design of the valve

allows free movement of the ball. The ball moves to open position when the

pump starts & allows free flow of liquid without any interference (See Fig.). As

the pump stops, the ball seats firmly against the metal seat due to its own

weight & back pressure of the liquid (Mouse over fig.). This results in

DROPLESS sealing.

n Dimensionally compatible with IS 5312 (Face to Face)

n Can be installed vertically or horizontally

n Operates silently

n Operates at temp 80 C continuously

(for 100 C application please contact us.)

Part List / Materials of Construction

Dimensions (A = Valve size in mm)

A 25 40 50 65 80 100 125 150 200 250 300 350

D 115 150 165 185 200 220 250 285 340 395 445 527

L 144 174 200 240 260 300 350 400 500 600 700 800

H 115 160 180 210 230 280 340 400 500 570 680 800

T 15 15 16 16 19 20 21 21 22 24 25 29

Pressure rating

Size 25 - 125 mm = PN 16

Body test :1.5 times rated Pressure

Seat test :1.1 times rated Pressure

Comparison

Normex check valve - Ball typeConventional

non - return valve
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1.Head Loss

(Pressure

Drop)

Low, Due to light, free flowing rubber ball,

without causing any interference, resulting in

lower power consumption (frictionless)

High, Due to interference of the heavyhinge/disc mechanism, with the flow

resulting in high power consumption.

2.Perfect

Sealing

The sealing face is deposit free, since it

remains inclined in any position of the valve,

ensuring perfect sealing. (Drop less)

Deposits on the sealing due to its

flatness may not ensure perfect sealing.

3.Solid

Handling

Capacity

Clear passage, equal to nominal valve dia.

gives larger solid handling capacity

The above interference leaves a clear

passage less than the normal valve dia.,

hence smaller solid handling capacity

4.Self

Cleaning

Any deposits formed on the ball and in the

valve passage are removed due to the rolling of

the ball in operation.

No such possibility

5.

Non-

Clogging

Nature

No moving parts other than the free moving

ball, hence no jamming/clogging.Moving parts may jam due to deposits.

6.

Applications

Unlimited. Ideal for slurries, sewage, viscous,

erosive & corrosive liquids.

Limited. Troublesome for slurries,

sewage & viscous liquids.

7.

Maintenance

Abrasion resistance of rubber ensures longer

life. Also the cleanout port does not

necessitate valve removal from the pipeline.

Hence much shorter downtime.

Parts may wear out due to abrasion.

Also, valve may be removed from the

pipeline for maintenance/ cleaning.

Hence longer down time.

Normex Rubber lined /FRP lined NRV B - 02

This ball check valve can be offered with inside lining of Rubber / FRP

with all its advantages. The lining of Ebonite hard, Neoprene, Butyle etc.,

can also be offered depending on chemicals / abrasives handled.

This is the best valve for abrasives / chemicals.

The overall dimension of this valve will be similar to standard check valve,

but face to face length will be more by 6 - 10 mm

Size 25 350 mm

Rubber Lined Ball Check Valves - Model B - 02
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Part Description Material

1. Body Cast Iron

2. Strainer Cast Iron

3. Ball Nitrile Rubber

4. Seal Ring Nitrile Rubber

These valves are lined internally with rubber so that media does notcome incontact with metal. Most suitable for corrosive/erosive applications.

Materials : Body & Cover: C I(GG25)Ball: Nitrile rubber coatedSeat: IntegralLining: Ebonite HardSizes :25 to 350 NBPressure rating : 25 t0 125NB : PN 1.6

150 to 300 NB : PN 1.0350 NB : PNO.6 (For CI Construction.)

Installatlon : Vertical / HOrizontal

1.

Normex Low Pressure check valve (Threaded) B - 06

Low pressure check valve is having both ends threaded & has got all the

advantages of standard ball check valve. This valve works vertically or

horizontally.

Sizes : 25 100 mm working pressure

6 kg/cm2

Sizes : 100, 125 & 150 mm available in flanged top & bottom

Ball Check valves ( Threaded ) - Model B - 06

Materials :Body : CI(GG24)Ball : Nitrile rubber coatedSeat : Nitrile

Other materials on request

Sizes :25 to 100 NB

Pressure rating :PNO.6(For CI Construction.)

Installation: Vertical/ Horizontal/Inclined

Part List / Materials of Construction
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5. Fastener Carbon Steel

6. Adaptor Cast Iron

Size(A) 25 40 50 65 80 100

H 100 135 165 200 244 284

W 90 125 148 190 232 275

Dimensions ( Valve size in mm)

Pressure rating =PN 6

Technical Comparison

CHECK VALVE - BALL TYPE

&

CONVENTIONALLLY USED FLAP TYPE

Normex Ball type B-01 Conventional Flap type

Innovative design, focused to eliminate all

constraints of conventional one and offer optimum

performance

Conventional design carries lot of constraints.

Internals designed in such a way that laminar flow

is not disturbed to a large extent.

Turbulance is generated in fluid flow due to design

limitations.

Very low pressure drop acros the valve which

saves energy, reduces pump cycle time duration

Comparatively high pressure losses, requires more

energy increases pump cycle time duration.

Opening & closing mechanism is by way to free

flowing rubber coated ball hence eliminated hing-

pin-disc failure.

Opening & closing mechanism involves hing-pin-

disc calls for frequent maintenance.

Maintenance free - in case required open top

cover. No need to remove valve from pipe line - verylow down-time.

For maintenance, valve is required to remove from

pipe.Longer down time.

Same valve can be used for wide range of

applications as it can be supplied with ruibber or

FRP lining especially for corrosive and errosive

applications.

No such possibility. For these applications special

metallurgy required to be used which results in

paying high cost for the valve.

Vertical or horizontal installation is easily possible Installation recommended for horizontal position.

Material used is of grade FG 260 having higher

tensile strength (26 N/mm2)

Material recommended is FG 200 having lower

tensile strength (20 N/mm2)

*For more details contact Normex

Ball type Check Valves| Ball type Foot Valves| Wafer type Butterfly Valves|

Hydrodynamic Guided Closing ( HGC ) Check Valves| Wafer type Check Valves|

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Ball Check CAtalog