blowdown & blowoff valves type blb - insatech...bont® valves type blb, for continuous blowdown the...

BONETTIQuality Valves & Level Gauges

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Blowdown & Blowoff Valves Type BLB

For use at condition lower than ASME 600 lb Class and temperature lower than 350 °C (662 °F) we can use ASTM A562 T.630

• Carbon Steel can be supplied to ASME Std on request as well as ASTM as per our Std.• Different Process connections Flanges can be both socket welded & butt welded.• Size & Class as per requirement.

01

Part No. 71 22 Part No. 71 22

01 Body ASTM A105 ASTM A182 F22 24 Seat ASTM A105 ASTM A182 F22

02 Yoke ASTM A105 ASTM A105 + Stellite Gr. 6 + Stellite Gr. 6

03 Disk - Stem ASTM A479 410 c.3 ASTM A479 410 c.3 31 Antirotation Ring ASTM A182 F6 ASTM A182 F6

+Stellite Gr. 6 +Stellite Gr. 6 40 Thrust bearing Alloy Steel Alloy Steel

05 Bottom Ring Stainless Steel Stainless Steel 41 Bushing Locking Ring ASTM A182 F6 ASTM A182 F6

06 Packing Graphite Graphite 46 Backseat Ring ASTM A479 316 ASTM A479 316

08 Swing Bolt ASTM A193 B7 ASTM A193 B7 + Stellite Gr. 6 + Stellite Gr. 6

09 Pin Alloy Steel Alloy Steel 47 Backseat Locking Ring ASTM A564 T.630 ASTM A564 T.630

10 Packing Flange ASTM A105 ASTM A105

11 Yoke Bushing ASTM B150 C62300 ASTM B150 C62300

12 Handwheel Nodular Cast Iron Nodular Cast Iron

15 Handwheel Nut Carbon Steel Carbon Steel

15A Bolt Nut ASTM A194 2H ASTM A194 2H

17 Washer Carbon Steel Carbon Steel

19 Split Gland Stainless Steel Stainless Steel

20 Name Plate Stainless Steel Stainless Steel

Part Material for Standard Material Schedule

®BONT Valves Type BLB, for Continuous Blowdown

Forged Steel - Bonnetless - Non-rotating Stem

ASME Class 1500 - 4500

Quality Valves & Level Gauges

6093

For use at condition lower than ASME 600 lb Class and temperature lower than 350 °C (662 °F) we can use ASTM A562 T.630


02

Part No. 71 22 Part No. 71 22

01 Body ASTM A105 ASTM A182 F22 19 Gland Stainless Steel Stainless Steel

+Inlay 316 +Inlay 316 24 Seat ASTM A105 ASTM A182 F22

02 Yoke ASTM A216 WCB/A105 ASTM A216 WCB/A105 + Stellite Gr. 6 + Stellite Gr. 6

03 Throttling Disk ASTM A479 410 ASTM A479 410 26 Stem Key Carbon Steel Carbon Steel

+Stellite Gr. 6 +Stellite Gr. 6 26A Bushing Key Carbon Steel Carbon Steel

4 Stem ASTM A479 410 c.3 ASTM A479 410 c.3 40 Thrust Bearing Alloy Steel Alloy Steel

05 Bottom Ring Stainless Steel Stainless Steel 41 Bushing Locking Ring ASTM A105 ASTM A105

06 Packing Graphite Graphite 46 Connector ASTM A182 F6a cl.3 ASTM A182 F6a cl.3

08 Gland Stud ASTM A193 B7 ASTM A193 B7 50 Pressure Seal Bonnet ASTM A105 ASTM A182 F2

09 Grain Carbon Steel Alloy Steel + Inlay 316 + Inlay 316

10 Packing Flange ASTM A105 ASTM A105 57 Bonnet Split Ring AISI 420 Q.T. AISI 420 Q.T.

11 Yoke Bushing ASTM B150 C62300 ASTM B150 C62300 58 Pressure Seal gasket ASTM A182 F316 ASTM A182 F316

12 Handwheel Carbon Steel Carbon Steel 61 Bonnet Bolt ASTM A193 B7 ASTM A193 B7

15 HandwheeleLocking Ring Carbon Steel Carbon Steel 102 Bonnet Flange ASTM A105 ASTM A105

15A Stud Nut ASTM A194 2H ASTM A194 2H

18 Main Disk ASTM A479 410 ASTM A479 410

+Stellite Gr. 6 +Stellite Gr. 6


®BONT Valves Type PBR, for Blowoff

with Zero Leakage after Closing Operation

Forged Steel - Pressure Seal Bonnet - Non-rotating Stem


6094

For use at condition lower than ASME 600 lb class and temperature lower than 350˚(662˚F) we can use ASTM A562 T630.

03

Part No 71 22 Part No 71 22

1. Body ASTM A105 ASTM A182 F22 17. Washer Carbon Steel Carbon Steel

2. Bonnet ASTM A105 ASTM A182 F22 17A. Washer Carbon Steel Carbon Steel

2A. Bonnet Flange ASTM A105 ASTM A479 F22 20. Nameplate Stainless Steel Stainless Steel

3. Disk- Stem A479 T410 c3 A479 T410 c3

+ Stellite Gr 6 + Stellite Gr 6 23. Position indicator Carbon Steel Carbon Steel

5. Bottom Ring Stainless Steel Stainless Steel 23.1 Indicator Disk PVC PVC

6. Packing Graphite Graphite 24. Seat ASTM A105 A479 F22

+Stellite Gr6 +Stellite Gr6

6A. Gasket 316SS + Graphite 316SS + Graphite 25. Flange • ASTM A105 ASTM A182 F22

8. Swing Bolt ASTM A193 B7 ASTM A193 B7 26. Stem key Carbon Steel Carbon Steel

8A. Body Bonnet Stud ASTM A193 B7 ASTM A193 B7 40. Thrust Bearing SKF SKF

9. Pin Alloy Steel Alloy Steel 41.Bush Locking Ring ASTM A105 ASTM A105

10. Packing Flange ASTM A105 ASTM A105

11. Yoke Bushing ASTM B150 C62300 ASTM B150 C62300

12. Handwheel Carbon Steel Carbon Steel

15. Handwheel Nut Carbon Steel Carbon Steel

15A. Bolt Nut ASTM A194 2H ASTM A194 2H

15B. Stud Nut ASTM A194 2H ASTM A194 2H

®BONT Valves Type BLB, for Continuous Blow-down

Forged Steel – Bolted Bonnet- Non Rotating Stem




6095 6096


For use at condition lower than ASME 600 lb class and temperature lower than 350˚ (662 ˚F) we can use ASTM A562 T630.

04

Part No 71 22 Part No 71 22

1. Body ASTM A105 + Stellite Gr 6 ASTM A182 F22++ Stellite Gr 6 15A. Bolt Nut ASTM A194 2H ASTM A194 2H

2. Bonnet ASTM A105 ASTM A182 F22 15B. Stud Nut ASTM A194 2H Carbon Steel

2A. Bonnet Flange ASTM A105 ASTM A479 F22 17. Washer Carbon Steel Carbon Steel

3. Disk ASTM A479 T410 c3 A479 T410 c3

+ Stellite Gr 6 + Stellite Gr 6 17A. Washer Carbon Steel Carbon Steel

4. Stem A479 T410 c3 A479 T410 c3 20. Name Plate Stainless Steel Stainless Steel

5. Bottom Ring Stainless Steel Stainless Steel 23. Position Indicator Carbon Steel Carbon Steel

6. Packing Graphite Graphite 23.1 Indicator Disk PVC PVC

6A. Gasket 316SS+Graphite 316SS+Graphite 26. Stem Key Carbon Steel SKF

8. Swing Bolt ASTM A193 B7 ASTM A193 B7 40. Thrust Bearing SKF SKF

8A. Body Bonnet Stud ASTM A193 B7 ASTM A193 B7 41. Bush Locking Ring ASTM A105 ASTM A105

9. Pin Alloy Steel Alloy Steel 70. Connecting Ring Stellite Gr 6 Stellite Gr 6

10. Packing Flange ASTM A105 ASTM A105

11. Yoke Bushing ASTM B150 C62300 ASTM B150 C62300

12. Handwheel Carbon Steel Carbon Steel

14. Disk Pad A479 F6a cl3 A479 F6a cl3

15. Handwheel Nut Carbon Steel Carbon Steel

®BONT Valves Type BLB, for Blowoff Application with Anti-cavitation Disc

Forged Steel – Bolted Bonnet- Non Rotating Stem



6097


®BONT Valves Type BLB, for Continuous Blowdown

The continuous blowdown valves are venturi type valves

designed for operation in open position. Their function is mainly to

control a continuous flow of steam and/or water under high p.

For that reason the design and materials must be such as to

minimise the effects of a fluid stream in condition of flashing or

made of water containing sometime abrasive particles.

The outlet of our valves is purposely Venturi tube-shaped. The

bonnetiess design enables easy dismantling, inspection and

maintenance. The stem is rising, non-rotating. A local stroke

indicator shows the position of the disk.

The materials used for these valves are indicated on page 2 for the

most requested Material Schedules, namely: Material Schedule

71, with carbon steel body; Material Schedule 22, with

chromemolybdenum alloy steel body.

In spite of the above mentioned features, it can happen that

these valves

- after some operating time - are not able to ensure a tight seal,

since even a slow-acting erosion deteriorates the working

surfaces of the disk and seat. What above does not affect its

function; the only consequence is a slight rise in the out flow

rate, the disk being in the same position, remediable by

closing the valve a little. The orifice can be selected in

accordance with the Table Fig. 6095, where the section of the

actual seat bore is indicated as a function of the upstream

pressure as well as of the flow rate.

The downstream pressure does not affect the flow rate, being

usually lower than the critical pressure.

The following data must be indicated for the selection of a ® BONT valve, type BLB:

- fluid

- max flow rate

- upstream pressure P1

- downstream pressure P2

- temperature.


05

Valves Type BLB and PBR, for high p

ASME Class 1700 - 2700 - 4500

The consequences of these critical flows of water/steam must not

affect geometry and finish of the contact surfaces between main

disk and main seat in order to ensure tight sealing with the passing

of time. The pressure seal bonnet enables easy dismantling,

inspection and maintenance. The stem is rising, non-rotating.

The materials used for these valves are shown on page 3 for the

most requested Material Schedules, namely: Material Schedule

71 with carbon steel body; Material Schedule 22 with

chromemolybdenum alloy steel body. The satisfactory results

obtained on all installations confirm the suitability of our design to

the most severe operating conditions. The following data must be

indicated for the selection of a BONT® valve,

type PBR:

- fluid

- max flow rate

- upstream pressure P1

- downstream pressure P2

- temperature.

Remember what follows: the valve being fully open, the

downstream pressure shall not be considered equal to the

atmospheric pressure as well to the condenser vacuum; in fact

there is a back pressure originated by the flowrate and the

downstream pipe section.

®BONT Valves type PBR, for Blowoff

These valves are usually used when tight seal is needed after a

blowoff operation. This utilization could be required by process

necessity and/or economical reasons.

In the past the two functions were mostly performed by two

different valves, fitted in series and operated in accordance with a

definite sequence.

Our valve type PBR carries out both functions in sequence and

namely: blowoff with valve suitably open and tight sealing with

valve closed. It is a multistage valve splitting the pressure drop

along the whole disk that is along the different stages of the disk.

The design of the disk, of the fluid path inside the valve as well the

materials are suitable to operation with high p, therefore usually

with critical flow.

Max

flow

rate

(t/

h)

06

Fig. 6095 - Chart of Flow Rate for Continuous Blowdown

Dia

mete

r o

f o

rific

e (

inch

es)

The operating range is very wide, in particular:

- Feedwater P1 = 180 to 300 bar

P2 = 20 to 40 bar

T = 200 to 300 °C

Flow Rate up to 150 t/h

- Saturated and superheated steam P1 = 35 to 180 bar

T = 350 to 550 °C

Ap >critical Dp

Nominal Sizes

up to 1 " for Type BLB With End connections as per requirement.

up to 3" for Type PBR With End connections as per requirement.

We reserve the right to carry out any necessary alterations, without notice.

Actuated valves.

The design of these valves with rising, non-rotating stem,

as well their oversizing, enables easy assembly of any

actuator type.

The actuator can be equipped with:

- torque limit switches, adjustable both at the time of

delivery and on plant site;

- stroke limit switches;

- local position indicator;

- ON-OFF remote transmitters;

- ancillary switches for various warnings/operations;

- inductive or resistive position transmitter.

Copyright © Cesare Bonetti. All rights reserved.

Unless otherwise indicated, all materials on these pages are copyrighted by Cesare Bonetti S.p.A. All rights reserved. Any reproduction, modification, storage in a retrieval system or retransmission, in any

form or by any means, electronic, mechanical or otherwise is strictly prohibited.

Suzhou - Jiangsu | ChinaLimburg an der Lahn | Germany Garbagnate Milanese (MI) | Italy Vapi - Gujarat | India

Publication CB-PC-09- Rev.00

BONETTIQuality Valves & Level Gauges

Cesare Bonetti S.p.A.

20024 Garbagnate Milanese,

Via Cesare Bonetti 17, Italy.

Cesare Bonetti India Pvt. Ltd.

Survey No. 36, 39 & 42, On N.H. No. 08,

Karambele, Vapi - 396 105 Gujarat - India.

Tel : +91-260-6634000

Bonetti Armaturen GmbH & Co. KG.

D-65549 Limburg an der Lahn,

In Den Fritzenstucker, 4. Germany.

Cesare Bonetti (Suzhou) Level Gauges & Valves Co. Ltd.

No. 8, Lane 1, Wupu Road, Shengpu District,

Suzhou Industrial Park, Jiangsu, China - 215 126.

Local Sales: Tel.: +39-02 99072333, Fax : +39-02 99072300

Email : [email protected]

Export Sales: Tel.: +39-02 99072444, Fax : +39-02 99072400


Website : www.cesare-bonetti.com

Sales Office: Tel.: +91-22-27751851


Website : www.cesare-bonetti.com

Sales Office: Tel.: +49-06431 598310, Fax : +49-06431 598329


Website : www.bonetti.de

Sales Office: Tel.: +86-512-62816396, Fax : +86-512-62816393


Website : www.cesare-bonetti.cn

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blowdown & blowoff valves type blb - insatech...bont® valves type blb, for continuous blowdown the...

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