clasar check valve series b6 10 - bayard · bs 4504 the above drawings do not represent the flange...

BAYARD - Series B6 10 - AFAT01-03-049A-EN

Description• Anticipated closing creating no water hammer in pipelines.

• Silent.

• Damping of the check valve strock thanks to the elasticity of the disc made of polyurethane.

• Compactness.

• Extensive ranges of working pressures and diameters.

• Body and disc hydraulically profiled optimising the passing of the flow.

• Wafer body from DN 80 to 500 and flanged body from DN 600 to 1800.

• Standard stainless steel spring.

• Lifting rings from DN 200.

• Internal and external epoxy coating.

• Horizontal or vertical mounting.

• Maintenance-free.

• Drinking water approval.

Technical data• Range: DN 80 to 1800.

• Maximal working pressure: PN10, 16, 20, 25, 40 and 50.

• Temperatures: from -15°C to +80°C.

• Mounting between flanges according to standards EN 1092-2 (except for ISO PN 20 and 50) and ISO 7005-2:

- ISO PN 10 for DN 80 to 1800.






Applications• Pumping stations: - drinking water, - irrigation (degrilled water), - water treatment and distribution.

• Chemical industries.

• Environmental engineering.

CLASAR® check valveSeries B6 10

CLASAR® is a concentric discs check valve, ensuring the protection of the pumpsagainst flow inversion.


CLASAR® check valve2

Item Designation Qty Materials Standards 1 Body* 1 Ductile iron/EN-GJS-400-15 EN 1563 2 Counter plate * (DN 80 to 500) 1 Ductile iron/EN-GJS-400-15 EN 1563 Counter flange * (DN 600 to 1800) 1 Ductile iron/EN-GJS-400-15 EN 1563 3 Disc** 1 Polyurethane/PUR 4 Spring 1 Stainless steel 302 *** or Inconel® EN 10088 5 O-ring 1 Elastomer/NBR 6 Bolt s/DN Steel/Cadmium-coated steel EN ISO 898 7 Nut s/DN Steel/Cadmium-coated steel EN ISO 898* Blue epoxy coating** The choice for disc materials depends on the application, please consult us.*** Stainless steel 316 in option.

3

1

42

DN 80 to 150 DN 200 to 500 DN 600 to 1800

ØE

LL3

ØD ØC ØD

ØC

ØE

ØD

ØC

ØE

ØB

14

2

5L

6

2

15

73

1

4

5

ØB

FLOW DIRECTION FLOW DIRECTIONR=20

Ø20

3

4

2

6

CLO

SED

CLO

SED

CLO

SED

OP

EN

OP

EN

OP

EN

PN and ISO Type DN 10 16 20 25 40 50 L B C D E Weight mm mm mm mm mm Kg 80 80 132 90 115 142 2 100 100 162 113 140 174 6 125 125 192 138 170 210 11 150 150 216 163 195 246 17 200 127 271 224 256 290 22 250 146 326 275 310 352 36 300 181 376 323 360 398 53 350 222 435 373 413 460 80 400 232 485 418 460 520 100 450 260 536 569 507 544 150 500 292 590 518 565 626 180 600 435 * 615 930 920 550 700 500 * 715 1130 1120 875 800 515 * 820 1190 1180 1100 900 710 * 930 1490 1480 1600 1000 730 * 1030 1510 1500 2050 1200 900 * 1230 1900 1890 3400 1400 1120 * 1430 2275 2265 5400 1600 1352 * 1660 2540 2520 8100 1800 1440 * 1860 2890 2850 11850* Dimensions and drilling according to PN and standard ISO 7005-2

Flanged

To fitbetweenflanges


CLASAR® check valve3

Fig. 2

(Curves established for water at 20°C, standard Clasar® check valve mounted on horizontal pipeline).Flow in l/s

Pre

ssur

e dr

op in

mW

C

Fig. 1

Flows after pump switch off

Check valves mounted on large sup-ply networks and in pumping station delivery lines are required to operate frequently. Statistics show that when serious surging occurs, this is often due to the fact that the incorrect type of valve has been fitted.

For example, when a pump is swit-ched off in a pumping station, the flow loses speed, stops and is subsequently reversed (Fig. 1).

The valve then closes under the effect of its weight or a return spring, or by the reversal of the flow.

Experience and calculations show that reversal can occur within an extremely short time (from 1/100 to 1/10 of second).

If the valve does not respond quickly, clo-sure will occur sharply during reversed-flow conditions, with the result that:

- the disc is force-fully applied against its seating, with the consequent production of a loud shock wave;

- water hammer is produced, with a steep wave front.

Shock waves and water hammer give rise to stresses which may even cause the mechanical failure of the valve’s compo-nents.

These problems are even more pronounced if an air-pressurized water tank is incorporated in the system. In this case, flow reversal in the short run of pipeline between the tank and the pump occurs very rapidly. The valve must the-refore operate very quickly if serious damage is to be avoided.

This is also the case for a pump switch off, when several pumps operate in parallel.

The ideal non-return flap is the one which closes at the same time the flow reverses.

For that, the disc must have a short travel and a low mass (low inertia and frictions).

To stop these problems, the Clasar®: • prevents water hammer: because it closes rapidly before the flow reversal (short travel, spring accompanying the disc

when closing). • is noiseless. • reduces the «shock»: due to a polyurethane disc elasticity.

The figure 2 shows the water hammer resulting from closure ofvarious types of valve under identical operating conditions:

1 - a plate check valve (single-flap),

2 - a multi-flap valve,

3 - a Clasar®.

Operation principle

Example of dynamic response

Hydraulic features

CLASAR® check valve

BAYARDTél. + 33 (0)4 37 44 24 24 - www.bayard.fr

The technical data and performance can be modified without prior notice depending on the technical evolution.


4

DN 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000 1200

ISO PN 10 Holes nbr 8 8 8 8 8 12 12 16 16 20 20 20 24 24 28 28 32 ISO 7005-2 Ø bolting M16 M16 M16 M20 M20 M20 M20 M20 M24 M24 M24 M27 M27 M30 M30 M33 M36 EN 1092-2 Threaded rods length C 160 180 210 240 220 240 280 320 340 320 400 130 130 140 150 150 170 NF E 29203 Threaded rods length P 160 180 210 240 220 240 280 320 350 340 420 140 150 160 170 190 190 NF E 29209 DIN 2501 BS 4504

ISO PN 16 Holes nbr 8 8 8 8 12 12 12 16 16 20 20 20 24 24 28 28 32 ISO 7005-2 Ø bolting M16 M16 M16 M20 M20 M24 M24 M24 M27 M27 M30 M33 M33 M36 M36 M39 M45 EN 1092-2 Threaded rods length C 160 180 210 240 220 260 290 330 350 340 430 150 150 170 160 170 190 NF E 29203 Threaded rods length P 160 180 210 240 220 260 300 350 360 360 440 160 150 170 180 190 220 NF E 29209 DIN 2501 BS 4504

ISO PN 20 Holes nbr 4 8 8 8 8 12 12 12 16 16 20 20 ISO 7005-2 Ø bolting M16 M16 M20 M20 M20 M24 M24 M27 M27 M30 M30 M33 NF E 29203 Threaded rods length C 170 190 230 260 240 260 300 350 360 360 440 170 NF E 29209 Threaded rods length P 170 190 230 260 240 270 320 370 390 380 470 170 DIN 2501 BS 4504

ISO PN 25 Holes nbr 8 8 8 8 12 12 16 16 16 20 20 20 24 24 ISO 7005-2 Ø bolting M16 M20 M24 M24 M24 M27 M27 M30 M33 M33 M33 M36 M39 M45 EN 1092-2 Threaded rods length C 170 200 230 260 240 270 310 360 380 370 450 160 170 180 NF E 29203 Threaded rods length P 170 200 230 260 240 270 310 360 380 370 450 170 170 180 NF E 29209 DIN 2501 BS 4504

ISO PN 40 Holes nbr 8 8 8 8 12 12 16 16 16 20 20 ISO 7005-2 Ø bolting M16 M20 M24 M24 M27 M30 M30 M33 M36 M36 M39 EN 1092-2 Threaded rods length C 170 200 230 260 250 280 330 380 400 390 470 NF E 29203 Threaded rods length P 170 200 230 260 260 280 330 380 400 390 490 DIN 2501 BS 4504

ISO PN 50 Holes nbr 8 8 8 12 12 16 16 20 20 24 24 ISO 7005-2 Ø bolting M20 M20 M20 M20 M24 M27 M30 M30 M33 M33 M33 NF E 29203 Threaded rods length 180 210 240 270 260 300 340 390 410 400 490 DIN 2501 BS 4504

The above drawings do not represent the flange gaskets to be inserted, while mounting, between the check valve and the flanges of the pipeline.The lengths of the threaded rods were defined based on the use of 2 mm thick.Length of the threaded rods: C collar flange - P: flat flangeBolting and flange gaskets not supplied with the check valve.

In function of the configuration of the line, we recommend to install the check valve in an established flow area, at a distance of 3 to 5 DN from the singularities (pumps, elbows, valves, convergents, divergents, etc.).

MountingØ

M

ØM

L L

Mounting between flanges DN 80 to DN 500 Mounting with flanges DN 600 to DN 1800

clasar check valve series b6 10 - bayard · bs 4504 the above drawings do not represent the flange...

Documents