Flowserve BK 27N - Manual (Page 5)

5
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. As the condensate temperature rises, the plates deflect, drawing
the stage nozzle towards the closed position. As the condensate temperature sinks, the deflection of the
Duo stainless steel plates decreases and the steam trap opens at the adjusted opening temperature.
The thermostatic and spring characteristics of the stack of plates are balanced such that condensate is
always discharged at a given undercooling temperature.
The trap provides automatic air-venting at start-up and during operation. BK 27N can also be used for
thermal air-venting in steam systems.
Explanatory Notes
Scope of supply
BK 27N:
Steam trap BK 27N
Installation manual
Description
Thermostatic steam trap with corrosion-resistant thermostatic element (Duo stainless steel bimetallic
regulator, externally adjustable) unaffected by waterhammer. With internal Y-type strainer, integrated
non-return valve and asbestos-free cover gasket (graphite). Installation in any position.
The default factory setting allows the steam trap to discharge condensate with virtually no banking-up. For
more undercooling the settings of the installed, depressurized steam trap can be modified externally.
BK 27N:
For installation in horizontal and vertical pipes.
Design