Bosch UT-L 24 - Flash Trap to DIN-EN 12828

Fitting | 75
6 720 807 794 (2013/04)UNIMAT
10.4.5 Flash trap to DIN-EN 12828
In accordance with DIN-EN 12828, flash traps are to be
provided for boilers with a rated output > 300 kW. It is
not necessary to install a flash trap in heating systems.
This applies as long as an additional high limit safety cut-
out and an additional maximum pressure limiter are
installed. Install flash traps in the discharge pipe from
the safety valves. These separate the steam and the
water phases. Install a water drain line at the lowest
point of the flash trap. This enables escaping heating
water to be routed away safely and visibly. Route the
discharge pipe for steam to the outside at the highest
point of the flash trap.
Fig. 52 Flash trap for UNIMAT UT-L boilers
D
1–5
diameter
HHeight
6 720 642 347-65.1il
D
2
D
1
H
D
3
D
4
D
5
Safety
valve
Flash
trap
Measurements
Cable between
safety valve and
flash trap
Discharge pipe
Type diameter
Heig
ht
Excess
pressure
Weight Length
Number
of bends
Length
Number
of
bends
D
1
D
2
D
3
D
4
D
5
H
[mm] [mm] [bar] [kg] [m] [m]
DN25/40
ET 40 DN25 DN40 DN50 DN50 165 346 ≤ 5 2.0
≤ 5 ≤ 2 ≤ 10 ≤ 3
ET 50 DN32 DN50 DN65 DN65 165 346
> 5
≤ 10
2.2
DN32/50
ET 50 DN32 DN50 DN65 DN65 165 346 ≤ 5 2.2
ET 65 DN40 DN65 DN80 DN80 283 440
> 5
≤ 10
6.8
DN40/65
ET 65 DN40 DN65 DN80 DN80 283 440 ≤ 5 6.8
ET 80 DN50 DN80 DN100 DN100 283 440
> 5
≤ 10
7.2
DN50/80
ET 80 DN50 DN80 DN100 DN100 283 440 ≤ 5 7.2
ET 100 DN65 DN100 DN125 DN125 391 616
> 5
≤ 10
14.2
DN65/100
ET 100 DN65 DN100 DN125 DN125 391 616 ≤ 5 14.2
ET 125 DN80 DN125 DN150 DN150 450 776
> 5
≤ 10
19.5
DN80/125
ET 125 DN80 DN125 DN150 DN150 450 776 ≤ 5 19.5
ET 150 DN100 DN150 DN200 DN200 500 896
> 5
≤ 10
28.0
DN100/
150
ET 150 DN100 DN150 DN200 DN200 500 896 ≤ 5 28.0
Table 38 Selection table for a flash trap for UNIMAT UT-L boilers for installation downstream of the safety valves with the
identification letters D/G/H