Flowserve GESTRA BB 1 Series User manual

1
BB 1...
BB 2... 
Installation and Maintenance
Instructions 810677-01
Dual-Plate Check Valves BB 1..., BB 2...

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Contents
Usage for the intended purpose ................................................................................... 8
Safety note .....................................................................................................................8
Warning ......................................................................................................................... 8
Ratings pursuant to article 9 of the PED ....................................................................... 9
Important Notes
Page
Explanatory Notes
Scope of supply ........................................................................................................... 10
Description .................................................................................................................. 10
Function ....................................................................................................................... 10
Technical data ...................................................................................................... 11 –12
Corrosion resistance ................................................................................................... 12
Sizing ........................................................................................................................... 12
Name plate / marking .................................................................................................. 13
Springs ........................................................................................................................ 14
BB 1..., BB 2.................................................................................................................. 14
BB 1... with dampers, BB 2... with dampers ................................................................. 14
Installation note ........................................................................................................... 15
Installation
Maintenance
BB 1 ... : Changing springs and O rings ................................................................ 17 –18
Tools ............................................................................................................................ 18
BB 2... : Changing springs .................................................................................... 19–21
Tools ............................................................................................................................ 21
Torques ................................................................................................................. 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
BDC
A
E
G
J
A
G
I
H
F
J
A

4
Component Parts BB 2...
Fig. 2
F
L
K
L
DC
J
H
G
H
I
K
G
J
I
B

5
Component Parts BB 1... with dampers
Fig. 3
I
E
H
M
BDC
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, the
use and application of safety equipment in accordance with regulations concerning
safety systems, and first aid & accident prevention – have achieved a recognised
level 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 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.
Usage for the intended purpose
The swing and dual-plate check valves BB 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.

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 group 1212
Use
BB 12/21 G, PN 6
to no yes no yes
BB 14/24 G, PN 16
BB 12/22 A, C, PN 10
to yes yes yes yes
BB 19 A, C, PN 160
BB 12/22 M, PN 10
to yes yes yes yes
BB 16/26 M, PN 40
1) PED = Pressure Equipment Directive

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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.
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 which are not fitted with springs in a vertical position with downward
flow. 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... 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

11
Pressure/temperature ratings*) for BB, carbon steel down to –10°C
at nominal pressure
p-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 °C
at nominal pressure
p-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°C
at nominal pressure
p-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/temperatureratings*) for BB, molybdenum-free stainlesssteel
down to –200°C at nominal pressure
p-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.

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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 PN
max. 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 °C
at 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 be
impaired by corrosion.
Sizing
The valve body must not be subjected to sharp increases in pressure. Welds and
flanges of the valve are designed to withstand dynamic loading (bending and
alternative stress). The dimensional allowances for corrosion reflect the latest state of
technology.
LEVASINT®is a registered trademark of Bayer AG, Leverkusen.

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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
2
2002 indicates the manufacturing year 2002.
2
2002 indicates the manufacturing year 2002.

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Installation
Springs
Note
Depending on the volume flow, the dual-plate check valve opens either
completely or only partly. During partial opening, i. e. at a reduced volume
flow (cf. pressure drop chart – instable range), clatter may occur which
gives rise to wear on the valve seat and plates, Fig. 4.
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 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 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“7WA”
Spring for 7 mbar opening pressure, suitable for horizontal installation or vertical
installation with upward flow.
Spring“2WA”
Spring for 2 mbar opening pressure, suitable for horizontal installation or vertical
installation with upward flow.
Spring“5VO”
Spring for 5 mbar opening pressure, suitable for horizontal installation or vertical
installation 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

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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 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 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 of the dual-plate check
valves 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 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 of the dual-plate check
valves BB with dampers.
M
M

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Maintenance
Replacing springs/O-rings of the BB 1...
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.
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.
Dual-plate check valve BB 1... Undo screws, remove springs and withdraw
hinge pins.
Take out springs, semicircular plates,
support plates and, if fitted, O-rings. Insert new springs with tension plates and hinge 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 plates
to the left.
Take out semicircular plates, springs and
support plates. Remove support plates, cover springs and withdraw hinge pins.
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.
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 and
support plates.
7
5 6
8