Flowserve UBK 46 User Manual
GESTRA
GESTRA Steam Systems
UBK 46
Installation Instructions 810475- 01
Steam Trap
UBK 46
1
Contents
Page
Important Notes
Usage for the intended purpose ............................................................................................................ 4
Safety note ............................................................................................................................................. 4
Danger................................................................................................................................................... 4
Rating pursuant to article 9 of the PED 97/23/EC ................................................................................. 5
ATEX Directive 94/9/EC, 1999/92/EC .................................................................................................... 5
Explanatory Notes
Scope of supply .....................................................................................................................................6
System description................................................................................................................................6
Function ................................................................................................................................................ 6
Technical data
Pressure/temperature ratings for PN 40 ................................................................................................ 7
Pressure/temperature ratings for Class 150 .......................................................................................... 7
Admissible differential pressure ............................................................................................................ 7
Materials ................................................................................................................................................ 7
Corrosion resistance ...............................................................................................................................8
Sizing..................................................................................................................................................... 8
Name plate/ marking............................................................................................................................. 8
Capacity chart UBK 46 ......................................................................................................................... 10
Opening temperatures UBK 46............................................................................................................ 11
Design
UBK 46................................................................................................................................................. 11
Key ...................................................................................................................................................... 12
Installation
UBK 46................................................................................................................................................. 13
Design with flanges............................................................................................................................. 13
Design with screwed-sockets............................................................................................................. 13
Design with socket-weld ends ........................................................................................................... 13
Design with butt-weld ends ...............................................................................................................13
Heat treatment of welds .......................................................................................................................14
Commissioning
UBK 46................................................................................................................................................. 14
Operation
Adjust discharge temperature........................................................................................................15,16
Tools .................................................................................................................................................... 15
2
Contents – continued –
Page
Maintenance
Danger.................................................................................................................................................17
Check steam trap ................................................................................................................................17
Clean / replace regulator ...................................................................................................................... 17
Clean / replace strainer ......................................................................................................................... 17
Tools .................................................................................................................................................... 18
Torques ............................................................................................................................................... 18
Spare Parts
Spare parts list .................................................................................................................................... 18
Decommissioning
Danger.................................................................................................................................................19
Disposal ............................................................................................................................................... 19
3
Important Notes
Usage for the intended purpose
UBK 46
Use the thermostatic steam trap UBK 46 only for the discharge of condensed water within the rated
pressures and temperatures.
Application in potentially explosive areas - see section “ATEX Directive 94/9/EC, 1999/92/EC” on
page 5.
Safety Note
The equipment 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 steam trap is under pressure during operation.
When loosening flanged connections, plugs or the regulator, hot water and/or steam may
escape. This presents the risk of severe scalding.
Installation and maintenance work should only be carried out when the system is
depressurized (0 bar): isolate the trap from both upstream and downstream pressure.
The trap becomes hot during operation.
This presents the danger of severe burns to hands and arms. Installation and
maintenance work should only be carried out when the system is cold (20 °C).
Sharp edges on internal parts present a danger of cuts to hands. Always wear industrial
gloves when replacing the regulator or the strainer.
4
Ratings pursuant to article 9 of PED1) 97/23/EC
Type UBK 46
Fluid Gas, steam Liquid
Fluid group 1 2 1 2
Use no yes no yes
Type PN Class
UBK 46 Cl 300 15, 20, 25
UBK 46 PN 40 15, 20, 25
CE marking no
1
) PED = Pressure Equipment Directive
Exception pursuant to article 3.3
ATEX Directive 94/9/EC, 1999/92/EC
The equipment can be used in potentially explosive areas 0, 1, 2, 20, 21 and 22.
The equipment does not have its own potential source of ignition and is therefore not subject
to 94/9/EC.
The equipment does not require an Ex marking.
Nominal size DN
5
Explanatory Notes
Scope of Supply
UBK 46
1 Thermostatic steam trap UBK 46
1 Installation manual
Spare parts
1 Kit as specified in the spare parts list on page 18
System description
The UBK 46 is a steam trap with adjustable condensate discharge temperature, thereby suppressing
the formation of flash steam.
Main field of application: Steam heated tracing systems.
Design: With corrosion-resistant Duo stainless steel (bimetallic) regulator unaffected by waterhammer
and Y-type large-surface strainer.
Installation in any position. When installed in horizontal lines cover must be on top.
Function
During start-up of the plant the Duo stainless steel plates are flat. The service pressure acts in the
opening direction, the valve is completely open. With rising condensate temperature the plates deflect
and draw the stage nozzle towards the closed position.
As the condensate temperature falls the deflection of the Duo stainless steel plates decreases and the
steam trap opens at the adjusted opening temperature.
Thermostatic and spring characteristics of the stack of stainless steel plates are balanced so that the
condensate is discharged without any flashing and at a constant temperature.
6
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