1
BB 1...BB 2...
�
Installation and MaintenanceInstructions 810677-01Dual-Plate Check Valves BB 1..., BB 2...
2
Contents
Usage for the intended purpose ................................................................................... 8Safety note ..................................................................................................................... 8Warning ......................................................................................................................... 8Ratings pursuant to article 9 of the PED ....................................................................... 9
Important Notes
Page
Explanatory Notes
Scope of supply ........................................................................................................... 10Description .................................................................................................................. 10Function ....................................................................................................................... 10Technical data ...................................................................................................... 11–12Corrosion resistance ................................................................................................... 12Sizing ........................................................................................................................... 12Name plate / marking .................................................................................................. 13
Springs ........................................................................................................................ 14BB 1..., BB 2... ............................................................................................................... 14BB 1... with dampers, BB 2... with dampers ................................................................. 14Installation note ........................................................................................................... 15
Installation
Maintenance
BB 1 ... : Changing springs and O rings ................................................................ 17–18Tools ............................................................................................................................ 18BB 2... : Changing springs .................................................................................... 19–21Tools ............................................................................................................................ 21Torques ................................................................................................................. 22–24
Spare parts list ....................................................................................................... 25, 26
Spare Parts
BB 1..., BB 2... ............................................................................................................... 16
Commissioning
BB 1..., BB 2... ............................................................................................................... 16
Operation
Declaration of Conformity ............................................................................................ 27
Annex
3
Component Parts BB 1...
Fig. 1
I
H
B DC
A
E
G
J
A
G
I
H
F
J
A
4
Component Parts BB 2...
Fig. 2
F
L
K
L
D C
J
H
G
H
I
K
G
J
I
B
5
Component Parts BB 1... with dampers
Fig. 3
I
E
HM
B DC
A
E
G
J
A
G
I
H
F
J
A
6
Sealing plug with gasket
Eyebolt
Name plate
Body
Plate support
O-ring
Semi-circular valve plates
Spring
Spring
Hinge pin
Hinge pin support
Threaded bolt
Damper (cpl.) with gasket
Key
F
G
H
I
J
K
L
M
A
B
C
D
E
7
Pressure Drop Chart
Fig. 4
8
Important Notes
Safety note
The valve must only be installed by qualified staff.Qualified staff are those persons who – through adequate training in engineerng, theuse and application of safety equipment in accordance with regulations concerningsafety systems, and first aid & accident prevention – have achieved a recognisedlevel of competence appropriate to the installation and commissioning of this device.
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 ofsevere burns and scalds to the whole body or severe cases of poisoning.Installation and maintenance work should only be carried out when thesystem is depressurized.The valve becomes hot or extremely cold during operation. This presentsthe risk of severe burns to hands and arms. Installation and maintenancework should only be carried out at room temperatures.Sharp edges on internals present a danger of cuts to hands. Always wearindustrial gloves for installation and maintenance work.
Usage for the intended purpose
The swing and dual-plate check valves BB ensure unidirectional flow in pipes bypreventing a backflow of liquids or gases.Use this equipment only within the specified pressure and temperature ratings andcheck corrosion resistance and chemical suitability for the application in question.
9
Ratings pursuant to article 9 of the PED1)
Important Notes – continued –
Gas Liquid
Category I II III IV
Nominal size [mm] DN DN DN DN DN
BB 11/21 G, PN 6 150 200–500 600–800
BB 11/22 G, PN 10 150–350 400–500 600–800
BB 14/24 G, PN 16 150–200 250–300 350–800
BB 12/22 A, C, PN 10 100 125–350 400–800
BB 14/24 A, C, PN 16 100–200 250–800
BB 15/25 A, C, PN 25 100–125 150–800
BB 16/26 A, C, PN 40 100 125–800
BB 17 A, C, PN 63 100 125–500
BB 18 A, C, PN 100 100 125–500
BB 19 A, C, PN 160 150–300
BB 12/22 M, PN 10 150–350 400–600
BB 14/24 M, PN 16 150–200 250–600
BB 15/25 M, PN 25 150–600
BB 16/26 M, PN 40 150–600
CE marking no yes yes yes no
Exception pursuant to article 3.3
Fluid group1 2 1 2
Use
BB 12/21 G, PN 6to no yes no yesBB 14/24 G, PN 16
BB 12/22 A, C, PN 10to yes yes yes yesBB 19 A, C, PN 160
BB 12/22 M, PN 10to yes yes yes yesBB 16/26 M, PN 40
1) PED = Pressure Equipment Directive
10
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 closeautomatically allowing fluid to flow in one direction only. The opening pressure andclosing time can be customized by modifying the spring characteristic. Hydraulicdampers 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 transitprotection.Please note that dual-plate check valves should not be used on reciprocatingcompressors, piston pumps or where pulsating flow exists.
The low opening pressure of the dual-plate check valves is a function of the springcharacteristics. When the opening pressure is reached the hinge sides of the platesopen first, thereby eliminating any possibility of the seats scuffing. As the pressureand flowrate rise, the opening angle increases symmetrically. Media entering thevalve at an unfavourable angle (e. g. due to pipe bends) may cause an asymmetricalopening of the plates. If centrifugal pumps are installed upstream of the valve itbecomes necessary to arrange for a defined stabilizing section. Systems wherepulsating flow exists require specially designed dual-plate check valves. Make sureto install valves which are not fitted with springs in a vertical position with downwardflow. Please note the installation recommendations outlined in the following pages.
Function
Scope of supply
Explanatory Notes
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... D1 Dual-plate check valve type BB 1... with dampers1 Installation manual
BB 2... D1 Dual-plate check valve type BB 2... with dampers1 Installation manual
Description
11
Pressure/ temperature ratings*) for BB, carbon steel down to –10 °Cat nominal pressurep-t series to EN 1092-2, table 17, material group 3E0, DN 150-500 mm (BB 19C, DN 150-300 mm)
Temperature [°C] 20 100 150 200 250 300 350 400 450 500 550 PN
BB 17 C [bar] 63 58.5 54.6 47.6 44.8 40.6 37.8 36.4 63
BB 18 C [bar] 100 93.3 86.7 75.6 71.1 64.4 60.0 57.8 100
BB 19 C [bar] 160 149.3 138.7 121.0 113.8 103.0 96.0 92.5 160
Pressure/ temperature ratings*) for BB, grey cast iron down to –10 °Cat nominal pressurep-t series to EN 1092-2, table 17, quality class 250, DN 150-800 mm
Temperature [°C] 20 100 150 200 250 300 350 400 450 500 550 PN
BB 11 G, BB 21 G [bar] 6 6 5.4 4.8 4.2 3.6 6
BB 12 G, BB 22 G [bar] 10 10 9.0 8.0 7.0 6.0 10
BB 14 G, BB 24 G [bar] 16 16 14.4 12.8 11.2 9.6 16
Pressure/ temperature ratings*) for BB, carbon steel down to –10 °Cat nominal pressurep-t series to EN 1092-1, table 15, material group 4E0, DN 150-800 mm
Temperature [°C] 20 100 150 200 250 300 350 400 450 500 550 PN
BB 12 C, BB 22 C [bar] 10 10 10 9.6 8.9 7.6 7.1 6.7 6.4 10
BB 14 C, BB 24 C [bar] 16 16 16 15.3 14.2 12.1 11.4 10.7 10.3 16
BB 15 C, BB 25 C [bar] 25 25 25 23.9 22.2 18.9 17.8 16.7 16.1 25
BB 16 C, BB 26 C [bar] 40 40 40 38.2 35.6 30.2 28.4 26.7 25.8 40
Technical Data
Explanatory Notes – continued –
*) When used for its intended purpose.
*) When used for its intended purpose. If t > 300°C spring 7 WAI required.
*) When used for its intended purpose. If t > 300°C spring 7 WAI required.
Pressure/ temperature ratings*) for BB, molybdenum-free stainless steeldown to –200 °C at nominal pressurep-t series to EN 1092-1, table 18, material group 12E0, DN 150-600 mm
Temperature [°C] 20 100 150 200 250 300 350 400 450 500 550 PN
BB 12 M, BB 22 M [bar] 10 9.3 8.7 8.2 7.8 7.4 7.2 6.9 6.8 6.6 6.3 10
BB 14 M, BB 24 M [bar] 16 14.9 13.9 13.2 12.4 11.9 11.4 11.1 10.8 10.6 10.1 16
BB 15 M, BB 25 M [bar] 25 23.3 21.7 20.6 19.4 18.6 17.9 17.3 16.9 16.6 15.8 25
BB 16 M, BB 26 M [bar] 40 37.3 34.7 32.9 31.1 29.7 28.6 27.7 27.0 26.5 25.2 40
*) When used for its intended purpose. If t > 300°C spring 7 WAI required.
12
Pressure/ temperature ratings*) for BB, grey cast iron,cast steel down to –10 °C at nominal pressure
Dual-plate check valve BB with LEVASINT® or hard rubber lining
Temperature [°C] –10 LEVASINT® Hard rubber PNmax. 70 max. 90
BB 11 G, BB 21 G [bar] 6 6 6 6
BB 12 G, BB 22 G [bar] 10 10 10 10
BB 14 G, BB 24 G [bar] 16 16 16 16
BB 12 C, BB 22 C [bar] 10 10 10 10
BB 14 C, BB 24 C [bar] 16 16 16 16
Technical Data – continued –
Explanatory Notes – continued –
Pressure/temperature ratings*) for BB, stainless steel down to –105 °Cat nominal pressure
p-t series to EN 1092-1, table 18, material group 12E0, DN 150-800 mm(BB 19 A, DN 150-300 mm)
Temperature [°C] 20 100 150 200 250 300 350 400 450 500 550 PN
BB 12 A, BB 22 A [bar] 10 9.3 8.7 8.2 7.8 7.4 7.2 6.9 6.8 6.6 6.3 10
BB 14 A, BB 24 A [bar] 16 14.9 13.9 13.2 12.4 11.9 11.4 11.1 10.8 10.6 10.1 16
BB 15 A, BB 25 A [bar] 25 23.3 21.7 20.6 19.4 18.6 17.9 17.3 16.9 16.6 15.8 25
BB 16 A, BB 26 A [bar] 40 37.3 34.7 32.9 31.1 29.7 28.6 27.7 27.0 26.5 25.2 40
BB 17 A [bar] 63 58.8 54.6 51.8 49.0 46.8 45.1 43.7 42.6 41.7 39.8 63
BB 18 A [bar] 100 93.3 86.7 82.2 77.8 74.2 71.6 69.3 67.6 66.2 63.0 100
BB 19 A [bar] 160 149.3 138.7 131.5 124.5 118.7 114.6 110.9 108.2 105.9 101.0 160
*) When used for its intended purpose. If t > 300°C spring 7 WAI required.
*) When used for its intended purpose.
Corrosion Resistance
When used for its intended purpose the safe functioning of the steam trap will not beimpaired by corrosion.
Sizing
The valve body must not be subjected to sharp increases in pressure. Welds andflanges of the valve are designed to withstand dynamic loading (bending andalternative stress). The dimensional allowances for corrosion reflect the latest state oftechnology.
LEVASINT® is a registered trademark of Bayer AG, Leverkusen.
13
Explanatory Notes – continued –
Name Plate / Marking
Direction of flow
For further ratings to EN 19 see valve body.
Type code BB 1... as specified by EN ISO 26552
Direction of flow
For further ratings to EN 19 see valve body.
Type code BB 2... as specified by EN ISO 26552
Fig. 5
Fig. 6
22002 indicates the manufacturing year 2002.
22002 indicates the manufacturing year 2002.
14
Installation
Springs
Note
Depending on the volume flow, the dual-plate check valve opens eithercompletely or only partly. During partial opening, i. e. at a reduced volumeflow (cf. pressure drop chart – instable range), clatter may occur whichgives rise to wear on the valve seat and plates, Fig. 4.Installing a dual-plate check valve with spring type “5 VO” in horizontallines or vertical lines with upward flow may result in loud noises, scuffingand subsequent wear on the seat.
BB 1..., BB 2...
1. Please note our installation recommendations on page 15.2. Clean plate seats.3. Horizontal flow: Insert flange bolts through bottom flange bore and tighten nuts.
Use off-the-shelf seals.4. Mount and align dual-plate check valve BB, making sure that the eyebolt is on
top. Insert and tighten flange bolts.5. Vertical flow: Insert commerical grade seals (bottom).6. Mount and align dual-plate check valve BB. Insert off-the-shelf seals (top). Insert
and tighten flange bolts.
The dual-plate check valve BB 1..., BB 2... with standard springs may be fitted inhorizontal pipework or in vertical pipework with upward flow. For downward flowspecial 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 verticalinstallation with upward flow.
Spring “2 WA”Spring for 2 mbar opening pressure, suitable for horizontal installation or verticalinstallation with upward flow.
Spring “5 VO”Spring for 5 mbar opening pressure, suitable for horizontal installation or verticalinstallation with downward flow.
BB 1... with dampers, BB 2... with dampers
1. Please note our installation recommendations on page 15.2. Use only the eyebolt as aid for installaing the valve. Do not attach steel or nylon
slings to damping cylinder .3. Do not tread on damping cylinder .4. Proceed as described under “BB 1..., BB 2...” .
B
M
B
M
15
Installation – continued –
Fig. 9
Fig. 7 Fig. 8
Fig. 10
incorrect correct
optimum with pump
16
Dual-plate check valves BB... do not require special preparations prior to theircommissioning. If the springs or O-rings of the dual-plate check valves BB 1... havebeen replaced check plugs for positive sealing and, if necessary, retighten them.Please refer to pages 22 to 24 for information on torques.If the dual-plate check valves BB... have not been properly positioned in the pipeworkor are fitted with unsuitable springs the consequent vibrations and clattering of theplates will give rise to loud noises. In this case either increase the capacity of thepump or replace the springs by suitable ones. Please observe the installlation notes.Do not attach objects to or tread on the damping cylinders of the dual-plate checkvalves BB with dampers.
Operation
BB 1..., BB 2...
BB 1..., BB 2...
Commissioning
A
If the dual-plate check valves BB... have not been properly positioned in thepipework or are fitted with unsuitable springs the consequent vibrations andclattering of the plates will give rise to loud noises. In this case either increase thecapacity of the pump or replace the springs by suitable ones. Please observe theinstalllation notes.Do not attach objects to or tread on the damping cylinders of the dual-plate checkvalves BB with dampers.
M
M
17
Maintenance
Replacing springs /O-rings of the BB 1...
Danger
Note that springs are preloaded, which means that they can jump out ofthe plate body when the valve is being installed or removed.This presents the risk of injuries to hands, arms and face.
GESTRA dual-plate check valves BB ... do not require any special maintenance.However, in certain cases (cf. “Commissioning”) it might be necessary to replace thesprings or O-rings.
Dual-plate check valve BB 1... Undo screws, remove springs and withdrawhinge pins.
Take out springs, semicircular plates,support plates and, if fitted, O-rings.
Insert new springs with tension plates andhinge pins.
2
43
1
18
Maintenance – continued –
Replacing springs / O-rings of the BB 1... – continued –
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
Screw in and tighten screws. Remove tension plates.
Install dual-plate check valve BB 1...
7
5 6
19
Dual-plate check valve BB 2... Undo threaded bolts, turn semicircular platesto the left.
Take out semicircular plates, springs andsupport plates.
Remove support plates, cover springs andwithdraw hinge pins.
Danger
Note that springs are preloaded, which means that they can jump out ofthe plate body when the valve is being installed or removed.This presents the risk of injuries to hands, arms and face.
Maintenance – continued –
Replacing springs of the BB 2...
2
3
1
4
20
Maintenance – continued –
Replacing springs of the BB 2... – continued –
Insert new springs using tension plates.Fit hinge pins and support plates.
Align support plates.
Remove tension plates. Insert semicircular plates with springs andsupport plates.
7
5 6
8
21
Maintenance – continued –
Replacing springs of the BB 2... – continued –
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
Align semicircular plates. Insert and tightenthreaded bolts.
Mount dual-plate check valve BB 2...
9 10
22
Item DN [mm]BB 11... BB 12... BB 14... BB 15... BB 16... BB 17... BB 18... BB 19...
100 13 13 13 13 13 13
125 13 13 13 13 27 27
150 65 65 65
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
1000 1940 1940 1940 1940 1940
1200 45 45 45 45 45
Maintenance – continued –
Torques [Nm]
A
Do not use lubricant for fastening bolts.
Austenitic steel
Item DN [mm]BB 21... BB 22... BB 24... BB 25... BB 26...
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
L
Do not use lubricant for fastening bolts.
Austenitic steel
23
Item DN [mm]BB 11... BB 12... BB 14... BB 15... BB 16... BB 17... BB 18... BB 19...
100
125
150 27 27 27
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
1000 1420 1420 1420 1420 1420
1200 19 19 19 19 19
Maintenance – continued –
Torques [Nm]
A
Do not use lubricant for fastening bolts.
Bronze
Item DN [mm]BB 21... BB 22... BB 24... BB 25... BB 26...
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
L
Do not use lubricant for fastening bolts.
Bronze
24
Item DN [mm]BB 21... BB 22... BB 24... BB 25... BB 26...
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
Maintenance – continued –
Torques [Nm]
Item DN [mm]BB 21... BB 22... BB 24... BB 25... BB 26...
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
L
Austenitic steel/Body covered with hard rubber lining or LEVASINT®
L
Do not use lubricant for fastening bolts.
D
Bronze/Body covered with hard rubber lining or LEVASINT®D
Do not use lubricant for fastening bolts.
LEVASINT® is a registered trademark of Bayer AG, Leverkusen.
25
F
Item DN
038543
Minimum purchasing quantity 20 pcs.
Two O-rings are required per valve. Contact your local dealer for small quantities.
Stock code
NBR PTFE
346779
342931
Stock code
342978
344372
344484
340825
038705
344714
037020
182719
122490
182114
344491
344592
175131
344715
343876
183105
Stock codeStock code
EPDM
100
125
150
200
250
300
350
400
450
500
600
700
750
800
038982
346778
342711
342713
342523
038718
342569
342585
180962
036007
180210
343603
342120
181939
037847
346777
342598
342710
342522
182574
342565
036002
036003
036987
344939
039663
Spare Parts
Spare Parts List
FPM
343721
342584
038948
26
Spare Parts – continued –
Spare Parts List
I
H
Item DN
348198
Springs complete with tension plates.
Contact your local dealer for small quantities.
Stock code
5 VO
348199
348209
Stock code
348211
348213
348215
348216
348217
348598
348600
Stock codeStock code
7 WA2 WA
100
125
150
200
250
300
350
400
450
500
600
700
750
800
348190
348191
348192
348193
348194
348195
348196
348197
348580
348581
348582
348583
348584
348585
348200
348201
248202
348203
348204
348205
348206
348207
348586
348587
348588
348589
348591
7 WAI
348220
348221
348222
348223
348224
348225
348226
348227
on request
on request
on request
on request
on request
on request
27
We hereby declare that the pressure equipment BB 1... and BB 2... conform to thefollowing European Directive:■ EC Pressure Equipment Directive (PED) No. 97/23 of 29 May 1997Dual-plate check valves are pressure equipment as defined in article 1, section 2.1.4of the PED.Applied conformity assessment procedure for valves up to DN 300 mm: Module A1as described in Annex III.Applied conformity assessment procedure for valves larger than DN 300 mm: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 equipmentwithout consultation with us.
Declaration of Conformity
Bremen, 16th July 2001GESTRA GmbH
Annex
Quality Assurance RepresentativeLars Bohl
Head of the Design Dept.Uwe Bledschun
Academically qualified engineer
28
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®
810677-01/1202c · © 2001 GESTRA GmbH · Bremen · Printed in Germany