Flowserve CB 1 User Manual
GESTRA
GESTRA Steam Systems
CB 1...
CB 2...
Installation Instructions 810707-02
Swing Flap Non-Return Valves
CB 1..., CB 2...
1
Contents
Page
Important Notes
Usage for the intended purpose ............................................................................................................ 8
Safety note ............................................................................................................................................. 8
Warning ................................................................................................................................................. 8
Ratings pursuant to article 9 of the PED ................................................................................................. 9
Explanatory Notes
Scope of supply ................................................................................................................................... 10
Description........................................................................................................................................... 10
Function ............................................................................................................................................... 10
Technical data ...................................................................................................................................... 11
Corrosion resistance ............................................................................................................................. 11
Sizing................................................................................................................................................... 11
Name plate / marking........................................................................................................................... 12
Installation
CB 1..., CB 2... ..................................................................................................................................... 13
Installation notes ................................................................................................................................... 14
Commissioning
CB 1..., CB 2... ..................................................................................................................................... 15
Operation
CB 1..., CB 2... ..................................................................................................................................... 15
Maintenance
CB 1..................................................................................................................................................... 15
CB 2... Replace springs / O-ring .................................................................................................. 16 –17
Tools .................................................................................................................................................... 17
Spare Parts
Spare parts list CB 24 S ....................................................................................................................... 18
Spare parts list CB 26, CB 26 S ............................................................................................................ 19
Annex
Declaration of conformity ...................................................................................................................... 20
2
Parts Drawing CB 1...
G
A
B
D
Fig. 1
E
3
Parts Drawing CB 2...
A
B
C
Fig. 2
4
H
G
H
D
E
F
Key
Eye bolt
A
Lock nut
B
Centering ring
C
Type designation (on name plate or impressed on valve body)
D
Body
E
O-ring
F
Disc
G
Spring
H
5
Pressure Drop Chart CB 1...
Partial opening
= instable range
Full opening
= stable range
Fig. 3
6
w
˙
Volume flow V
Pressure drop ∆p [bar]
The curves given in the chart are valid for
water at 20 °C. To read the pressure drop for
other fluids the equivalent water volume
flowrate must be calculated and used in the
graph.
The values indicated in the chart are applicable
to valves with horizontal flow. With vertical
flow insignificant deviations occur only within
the range of partial opening.
˙
V
= V˙ ·
w
˙
V
= Equivalent water volume flow
w
ρ
1000
in [l/s] or [m³/h]
ρ = Density of fluid (operating condition)
in kg/m³
˙
V
= Volume of fluid (operating condition)
w
in [l/s] or [m³/h]
Pressure Drop Chart CB 2...
Partial opening
= instable range
w
˙
Full opening
= stable range
Volume flow V
Pressure drop ∆p [bar]
Fig. 4
The curves given in the chart are valid for
water at 20 °C. To read the pressure drop for
other fluids the equivalent water volume
flowrate must be calculated and used in the
graph.
The values indicated in the chart are applicable
to valves with horizontal flow. With vertical
flow insignificant deviations occur only within
the range of partial opening.
˙
V
= V˙ ·
w
˙
V
= Equivalent water volume flow
w
ρ
1000
in [l/s] or [m³/h]
ρ = Density of fluid (operating condition)
in kg/m³
˙
V
= Volume of fluid (operating condition)
w
in [l/s] or [m³/h]
7
Important Notes
Usage for the intended purpose
The swing flap non-return valves CB 1.../CB 2... 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 by qualified staff.
Qualified staff are those persons who - through adequate training in engineering, 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.
8
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