Flowserve BB 1 User Manual

GESTRA Steam Systems

BB 1...
BB 2...
BB 1... ASME
BB 2... ASME

Installation and Maintenance
Instructions 810677- 03

Dual-Plate Check Valves BB 1..., BB 2...
Dual-Plate Check Valves BB 1... ASME, BB 2... ASME



1

2

Contents

Page

Important Notes

Usage for the intended purpose ..............................................................................................................4

Safety note .............................................................................................................................................4

Danger ...................................................................................................................................................4

Pressure Equipment Directive (PED) ........................................................................................................4

ATEX (Atmosphère Explosible) .................................................................................................................4

Explanatory Notes

Scope of supply ......................................................................................................................................5

Description .............................................................................................................................................5

Function .................................................................................................................................................5

Technical Data

Corrosion resistance ...............................................................................................................................6

Sizing .....................................................................................................................................................6

Name plate / marking .............................................................................................................................6

Design

BB 1... ....................................................................................................................................................

BB 1... with dampers ..............................................................................................................................8

BB 2... ...................................................................................................................................................9

BB 2... with dampers ............................................................................................................................10

Key .......................................................................................................................................................11

Installation

Danger .................................................................................................................................................12

Springs .................................................................................................................................................12

BB 1..., BB 2... .....................................................................................................................................12

BB 1... with dampers, BB 2... with dampers ..........................................................................................13

Examples of installation ........................................................................................................................14

Commissioning

BB 1..., BB 2... (with dampers) .............................................................................................................15

Operation

BB 1..., BB 2... (with dampers) .............................................................................................................15

7

Contents – continued –

Page

Maintenance

Danger .................................................................................................................................................16

BB 1... Changing springs and O-rings .............................................................................................16, 17

Tools ....................................................................................................................................................17

Danger .................................................................................................................................................18

BB 2... Changing springs ................................................................................................................18-20

Tools ....................................................................................................................................................20

Torques .......................................................................................................................................... 21-23

Spare Parts

Spare parts list ..............................................................................................................................24, 25

Decommissioning

Danger .................................................................................................................................................26

Disposal ...............................................................................................................................................26

Annex

Declaration of Conformity .....................................................................................................................27

3

4

Important Notes

Usage for the intended purpose

BB 2, BB 1, BB 2 with dampers, BB 1 with dampers:

The swing and dual-plate check valves ensure unidirectional flow in pipes by preventing a backflow
of liquids or gases.

Use this equipment only within the specified pressure and temperature ratings and check corrosion
resistance and chemical suitability for the application in question.

Safety note

The valve must only be installed and commissioned by qualified staff.
Maintenance and service work must only be performed by adequately trained persons who have a

recognised level of competence.

Danger

The valve is under pressure during operation.
When loosening flanged connections or sealing plugs, hot water, steam, corrosive liquids

or toxic gases may escape. This presents the danger of severe burns and scalds to the
whole body or severe cases of poisoning.

Installation and maintenance work should only be carried out when the system is
depressurized.

The valve becomes hot or extremely cold during operation. This presents the risk of
severe burns to hands and arms. Installation and maintenance work should only be
carried out at room temperatures.

Sharp edges on internals present a danger of cuts to hands. Always wear industrial
gloves for installation and maintenance work.

Pressure Equipment Directive (PED)

The equipment fullfills the requirements of the Pressure Equipment Directive PED 97/23/EC. BB...C and
BB...A for applications with fluids of group 1 and 2; BB...G for applications with fluids of group 2.
With CE marking (apart from equipment according to section 3.3).

ATEX (Atmosphère Explosible)

The equipment does not have its own potential source of ignition and is therefore not subject to the
ATEX Directive 94/9/EC.

The equipment can be used in potentially explosive areas 0, 1, 2, 20, 21, 22 (1999/92/EC).
The equipment is not Ex marked.

Explanatory Notes

Scope of supply

BB 1...

1 Dual-plate check valve type BB 1...
1 Installation manual

BB 2...

1 Dual-plate check valve type BB 2...
1 Installation manual

BB 1... D

1 Dual-plate check valve type BB 1... with dampers
1 Installation manual

BB 2... D

1 Dual-plate check valve type BB 2... with dampers
1 Installation manual

Description

Swing and dual-plate check valves BB feature two separately suspended semi-circular plates pivoting
on an independent hinge pin. The two plates open and close automatically allowing fluid to flow
in one direction only. The opening pressure and closing time can be customized by modifying the
spring characteristic. Hydraulic dampers are also available as optional extras to solve waterhammer
problems. Installation in any position, with due regard to our installation recommendations. Our
dual-plate check valves are fitted with eyebolts for easy installation and transit protection.

Please note that dual-plate check valves should not be used on reciprocating compressors, piston
pumps or where pulsating flow exists.

Function

The low opening pressure of the dual-plate check valves is a function of the spring characteristics.
When the opening pressure is reached the hinge sides of the plates open first, thereby eliminating
any possibility of the seats scuffing. As the pressure and flowrate rise, the opening angle increases
symmetrically. Media entering the valve at an unfavourable angle (e. g. due to pipe bends) may cause
an asymmetrical opening of the plates. If centrifugal pumps are installed upstream of the valve it
becomes necessary to arrange for a defined stabilizing section. Systems where pulsating flow exists
require specially designed dual-plate check valves. Make sure to install valves that are not fitted with
springs in a vertical position with upward flow. Please note the installation recommendations outlined
in the following pages.

5

6

Technical Data

Corrosion Resistance

When used for its intended purpose the safe functioning of the valve will not be impaired by corrosion.

Sizing

The valve body must not be subjected to sharp increases in pressure. The dimensional allowances for
corrosion reflect the latest state of technology.

Name Plate / Marking

For pressure & temperature ratings see indication on trap body (DN 50 – DN 125) or specification on
the name plate (DN 150 to DN 1200).

According to EN 19 the following indications are stated on the name plate:

■ Manufacturer’s brand

■ Type designation

■ Pressure class PN or Class

■ Material number

■ Max. temperature

■ Max. pressure

■ Stamp on valve body, e. g. specifies the quarter and the year of production

(Example: 4

th

quarter 2004).

4

04

Name plate BB... DN 150 to DN 1200

Direction of flow

Text on valve body BB... DN 50 to DN 125

Direction
of flow

Item number

Designation

Materials

facturing
date

Size / nominal
pressure

Designation Size / Nominal pressure

Mate­rials

Max.
pressure

Item
number

Min.
temperature

Notified bodyManu-

Max. pressure / temperature
Min. pressure / temperature

Notified body

Design

BB 1...

H

I

I

J

G

J

G

E

F

A

E

A

B

A

C

D

Fig. 1

H

7

8

Design – continued –

BB 1... with dampers

J

J

G

A

E

A

B

C

D

H

I

Fig. 2

I

H

G

E

F

A

M

Design – continued –

BB 2...

G

H

I

I

H

L

J

J

K

F

D

B

C

Fig. 3

G

L

K

9

10

M

A

D

E

B

Y

G
ES

T

R

A

Design – continued –

BB 2... with dampers

Fig. 4

G

H

I

I

H

G

L

J

L

J

K

K

F

D

B

E

C

M

Design – continued –

Key

A Sealing plug with gasket BB 1...

B Eyebolt

C Name plate

D Body

E Plate support BB 1...

F O-ring

G Semi-circular valve plates

H Spring left

I Spring right

J Hinge pin

K Hinge pin support BB 2...

L Threaded bolt BB 2...

M Damper (cpl.) with gasket

11

12

Installation

Danger

Danger of severe injuries, death and destruction caused by the explosion of explosive
gas-air mixtures.
An electrically insulated installation between pipe flanges can cause static electricity.
If the equipment is to be installed in explosion-risk areas, appropriate measures have to
be taken in order to discharge static electricity (earthing)!

Springs

The dual-plate check valve BB 1..., BB 2... with standard springs may be fitted in horizontal pipework
or in vertical pipework with upward flow. For downward flow special springs are required. For more
information refer to our data sheet “Dual-Plate Check Valve BB”.

Spring “7 WA”

Spring for 7 mbar opening pressure, suitable for horizontal installation or vertical installation with

upward flow.
Spring “2 WA”

Spring for 2 mbar opening pressure, suitable for horizontal installation or vertical installation with

upward flow.
Spring “5 VO”

Spring for 5 mbar opening pressure, suitable for vertical installation with downward flow. These
springs are also suitable for horizontal installation, opening pressure 20 mbar.

Note

Installing a dual-plate check valve with spring type “5 VO” in horizontal lines or vertical
lines with upward flow may result in loud noises, scuffing and subsequent wear on the
seat.

BB 1..., BB 2...

1. Please note our installation recommendations on page 16.

2. Clean plate seats.

Horizontal flow: Insert flange bolts through bottom flange bore and tighten nuts.

3.
Use off-the-shelf seals.

4. Mount and align dual-plate check valve BB, making sure that the eyebolt
Insert and tighten flange bolts.

Vertical flow: Insert commerical grade seals (bottom).

5.

6. Mount and align dual-plate check valve BB. Insert off-the-shelf seals (top). Insert and tighten flange
bolts.

B is on top.

Installation – continued –

BB 1... with dampers, BB 2... with dampers

1. Please note our installation recommendations on page 14.

2. Use only the eyebolt
damping cylinder

not tread on damping cylinder M.

3. Do

4. Proceed as described under “BB 1..., BB 2...”.

B as aid when installing the valve. Do not attach steel or nylon slings to

M.

13

14

Installation – continued –

Examples of Installation

incorrect correct

Fig. 5

Fig. 6

optimum with pump

Fig. 7

Fig. 8

Commissioning

BB 1..., BB 2...

Dual-plate check valves BB... do not require special preparations prior to their commissioning. If
the springs or O-rings of the dual-plate check valves BB 1... have been replaced check plugs
positive sealing and, if necessary, retighten them. Please refer to pages 21 to 23 for information on
torques.

If the dual-plate check valves BB... have not been properly positioned in the pipework or are fitted with
unsuitable springs the consequent vibrations and clattering of the plates will give rise to loud noises.
In this case either increase the capacity of the pump or replace the springs by suitable ones. Please
observe the installlation notes.

Do not attach objects to or tread on the damping cylinders M of the dual-plate check valves BB with
dampers.

A for

Operation

BB 1..., BB 2...

If the dual-plate check valves BB... have not been properly positioned in the pipework or are fitted with
unsuitable springs the consequent vibrations and clattering of the plates will give rise to loud noises.
In this case either increase the capacity of the pump or replace the springs by suitable ones. Please
observe the installation notes.

Do not attach objects to or tread on the damping cylinders M of the dual-plate check valves BB with
dampers.

15

16

Maintenance

GESTRA dual-plate check valves BB ... do not require any special maintenance.
However, in certain cases (cf. “Commissioning”) it might be necessary to replace the springs
or O-rings.

Danger

Note that springs are preloaded, which means that they can jump out of the plate body
when the valve is being installed or removed.

This presents the risk of injuries to hands, arms and face.

BB 1... Changing springs and O-rings

1 2

Dual-plate check valve BB 1... Undo screws, remove springs and withdraw hinge pins.

3 4

Take out springs, semicircular plates,
support plates and, if fitted, O-rings.

Insert new springs with tension plates and
hinge pins.

Maintenance – continued –

BB 1... Changing springs and O-rings – continued –

5 6

Insert and tighten screws. Remove tension plates.

7

Install dual-plate check valve BB 1...

Tools

■ Spanner socket A. F. 17, 19, 22, 24 mm to DIN 3124

■ Hexagon socket spanner A. F. 5, 6, 10, 12 mm to ISO 2936

■ Torque spanner 10-60 Nm, 60-120 Nm, DIN ISO 6789

17

18

Maintenance – continued –

Danger

Note that springs are preloaded, which means that they can jump out of the plate body
when the valve is being installed or removed.

This presents the risk of injuries to hands, arms and face.

BB 2... Changing springs

1 2

Dual-plate check valve BB 2... Undo threaded bolts, turn semicircular plates to the

left.

3 4

Take out semicircular plates, springs and support
plates.

Remove support plates, cover springs and withdraw
hinge pins.

Maintenance – continued –

BB 2... Changing springs – continued –

5 6

Insert new springs using tension plates.
Fit hinge pins and support plates.

7 8

Remove tension plates.

Align support plates.

Insert semicircular plates with springs and support
plates.

19

20

Maintenance – continued –

BB 2... Changing springs – continued –

9 0

Align semicircular plates. Insert and tighten threaded
bolts.

Tools

■ Spanner socket A. F. 17, 19, 22, 24 mm to DIN 3124

■ Hinged face spanner A. F. 2- 8 mm (for valves with polymer/hard rubber lining)

■ Torque spanner 10-60 Nm, 60-120 Nm, DIN ISO 6789

Mount dual-plate check valve BB 2...

Maintenance – continued –

Torques [Nm]

Item

A

Do not use lubricant for fastening bolts.

DN

[mm]

1000 1940 1940 1940 1940 1940

1200

BB 11... BB 12... BB 14... BB 15... BB 16... BB 17... BB 18... BB 19...

50 5 5 5 5

65 5 5 5 5

80 12 12 12 12

100 13 13 13 13 13 13

125 13 13 13 13

150

200 135 135 135

250 135 135 135

300 135 135 320

350 260 260

400 320 320

450 310 310 310 310 310

500 310 310 310 310 310 630 630

600 310 310 310 310 310 630 630

700 1080 1080 1080 1080 1080

800 2240 2240 2240 2240 2240

900 1940 1940 1940 1940 1940

45 45 45 45 45

Austenitic steel

27 27

65 65 65

Item

L

Do not use lubricant for fastening bolts.

DN

[mm]

150 15 15 15 15 15

200 15 15 15 15 15

250 26 26 26 26 26

300 26 26 26 26 26

350 26 26 26 26 26

400 70 70 70 70 70

BB 21...

Austenitic steel

BB 22... BB 24... BB 25... BB 26...

21

22

Maintenance – continued –

Torques [Nm] – continued –

Item

A

Do not use lubricant for fastening bolts.

DN

[mm]

1000 1420 1420 1420 1420 1420

1200 19 19 19 19 19

BB 11... BB 12... BB 14... BB 15... BB 16... BB 17... BB 18... BB 19...

50 5 5 5 5

65 5 5 5 5

80 12 12 12 12

100

125

150

200 58 58 58

250 58 58 58

300 58 58 230

350 110 110

400 230 230

450 310 310 310 310 310

500 310 310 310 310 310 460 460

600 310 310 310 310 310 460 460

700 460 460 460 460 460

800 940 940 940 940 940

900 1420 1420 1420 1420 1420

Bronze

27 27 27

Item

L

Do not use lubricant for fastening bolts

DN

[mm]

150 17 17 17 17 17

200 17 17 17 17 17

250 28 28 28 28 28

300 28 28 28 28 28

350 28 28 28 28 28

400 78 78 78 78 78

BB 21...

Bronze

BB 22... BB 24... BB 25... BB 26...

Maintenance – continued –

Torques [Nm] – continued –

Item

L

Do not use lubricant for fastening bolts.

Item

L

Do not use lubricant for fastening bolts.

DN

[mm]

150 7.5 7.5 7.5 7.5 7.5

200 7.5 7.5 7.5 7.5 7.5

250 15 15 15 15 15

300 15 15 15 15 15

350 26 26 26 26 26

400 42 42 42 42 42

DN

[mm]

150 8 8 8 8 8

200 8 8 8 8 8

250 17 17 17 17 17

300 17 17 17 17 17

350 28 28 28 28 28

400 47 47 47 47 47

Austenitic steel / Body D covered with hard rubber lining or plastic coating

BB 21...

Bronze / Body D covered with hard rubber lining or plastic coating

BB 21...

BB 22... BB 24... BB 25... BB 26...

BB 22... BB 24... BB 25... BB 26...

23

24

Spare Parts

Spare Parts List

Item

F

DN

[mm]

50 340463 340465

65 340065 340067

80 37839 39082

100

125

150

200 342710 342713 344372 343721

250 342522 342523 344484 344491

300 182574 038718 340825 344592

350 342565 342569 038705 175131

400 342584 342585 344714 344715

450 038948 180962 037020

Stock code Stock code Stock code Stock code

EPDM FPM NBR PTFE

037847 038982 038543

346777 346778 346779

342598 342711 342931 342978

500 036002 036007 182719 343876

600 036003 180210 122490

700 036987 343603 182114

750 344939 342120 183105

800 039663 181939

Minimum purchasing quantity 20 pcs.
Two O-rings are required per valve. Contact your local dealer for small quantities.

Spare Parts – continued –

Spare Parts List – continued –

Item

H
I

DN

[mm]

50 349345 349344 349346

65 349348 349347 349349

80 349391 349390 349392

100

125 348201 348191 348199 348221

150

200 348203 348193 348211 348223

250 348204 348194 348213 348224

300 348205 348195 348215 348225

350 348206 348196 348216 348226

400 348207 348197 348217 348227

450 348586 348580 348598 on request

Stock code Stock code Stock code Stock code

2 WA 7 WA 5 VO 7 WAI

348200 348190 348198 348220

248202 348192 348209 348222

500 348587 348581 348600 on request

600 348588 348582 on request

700 348589 348583 on request

750 348584 on request

800 348591 348585 on request

Springs complete with tension plates.
Contact your local dealer for small quantities.

25

26

Decommissioning

Danger

Risk of severe burns and scalds to the whole body!
Before loosening flanged connections, stuffing box unions or sealing plugs, make sure

that all connected lines are depressurized (zero bar) and cooled down to room
temperature (20 °C).

Disposal

Dismantle the valve and separate the waste materials, using the specifications in the table
“Materials” as a reference.

For the disposal of the valve observe the pertinent legal regulations concerning waste disposal.

Annex

Declaration of Conformity

We hereby declare that the pressure equipment BB 1... and BB 2... conform to the following
European Directive:

■ EC Pressure Equipment Directive (PED) No. 97/23 of 29 May 1997 – apart from equipment according

to section 3.3

Applied conformity assessment procedure: Module H as described in Annex III and verified by the
Notified Body 0525.

This declaration is no longer valid if modifications are made to the equipment without consultation
with us.

Bremen, 11th February 2006

GESTRA AG

Dipl.-Ing. Uwe Bledschun

(Academically qualified engineer)

Head of Design Dept.

Dipl.-Ing. Lars Bohl

(Academically qualified engineer)
Quality Assurance Representative

27

Agencies all over the world:

www.gestra.de

GESTRA

España

GESTRA ESPAÑOLA S.A.

Luis Cabrera, 86-88
E-28002 Madrid
Tel. 00 34 91 / 5 15 20 32
Fax 00 34 91 / 4 13 67 47; 5 15 20 36
E-mail: aromero@flowserve.com

Great Britain

Flowserve Flow Control (UK) Ltd.

Burrel Road, Haywards Heath
West Sussex RH 16 1TL
Tel. [phone] / 31 44 00
Fax [phone] / 31 45 57
E-mail: gestraukinfo@flowserve.com

Italia

Flowserve S.p.A.

Flow Control Division
Via Prealpi, 30
l-20032 Cormano (MI)
Tel. 00 39 02 / 66 32 51
Fax 00 39 02 / 66 32 55 60
E-mail: infoitaly@flowserve.com

Polska

GESTRA POLONIA Spolka z.o.o.

Ul. Schuberta 104
PL - 80-172 Gdansk
Tel. 00 48 58 / 3 06 10 -02 od 10
Fax 00 48 58 / 3 06 33 00
E-mail: [e-mail]

Portugal

Flowserve Portuguesa, Lda.

Av. Dr. Antunes Guimarães, 1159
Porto 4100-082
Tel. [phone]
Fax [phone]
E-mail: jtavares@flowserve.com

USA

Flowserve GESTRA U.S.

2341 Ampere Drive
Louisville, KY 40299
Tel.: 00 15 02 / 502 267 2205
Fax: 00 15 02 / 502 266 5397
E-mail: dgoodwin@flowserve.com

GESTRA AG

P. O. Box 10 54 60, D-28054 Bremen
Münchener Str. 77, D-28215 Bremen
Telephone [phone]
Fax [phone]
E-Mail gestra.ag@flowserve.com
Internet www.gestra.de

810677-03/806cm · 2004 GESTRA AG · Bremen · Printed in Germany

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