Fitting | 73
6 720 807 794 (2013/04)UNIMAT
10.4.4 Safety valve
The safety valve from ARI, Figure 902, can be fitted
directly to the boiler connector VSL ( Fig. 13,
page 23). The internal connector diameter of the boiler
is matched to the required internal diameter of the
safety valve during manufacture. For the outlet side of
the safety valve, suitable mating flanges are available as
accessories.
Fig. 51 Safety valve for heating systems with UNIMAT UT-
Lboiler
AOutlet
aLeg length
bLeg height
EInlet
HHeight
x Clearance above
RP 80 DN80 DN40 350 175 145 3 13 – 15
RP 100 DN100 DN50 350 175 160 4 18 – 21
RP 125 DN125 DN65 350 175 225 5 24 – 30
RP 150 DN150 DN65 350 175 240 7 32 – 40
RP 200 DN200 DN80 400 200 270 13 48 58 66
RP 250 DN250 DN100 450 225 305 23 67 83 101
RP 300 DN300 DN125 500 250 335 37 92 110 142
RP 350 DN350 DN150 550 275 405 50 125 156 192
RP 400 DN400 DN150 550 275 430 65 147 189 251
RP 500 DN500 DN200 650 325 500 123 228 278 331
1) Internal diameter for flanges to DIN 2633/2634/2635
2) Internal diameter for flanges to DIN 2633/2635
Intermediate
return piece
Nominal diameter Measurements Volume Shipping weight
Type Height Width PN16 PN25 PN40
A
1
1)
A
2
2)
H
1
H
2
B
[mm] [mm] [mm] [l] [kg] [kg] [kg]
Table 35 Specification of the intermediate return piece for UNIMAT UT-L boilers
Dimensions given with ± 1 % tolerance;
Transport weights given with ± 4 %
tolerance
ARI safety valve,
Figure 902
Unit Internal diameter, valve size
1)
1) Version of the flange connections; PN16 to DIN 2633 or PN40 to DIN 2635.
DN32 DN40 DN50 DN65 DN80 DN100 DN125 DN150
Internal diameter
outlet
1)
O – DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250
Leg length A mm 110 115 120 140 160 180 200 225
Leg height b mm 115 140 150 170 195 220 250 285
Height H mm 330 390 435 545 610 690 845 890
Clearance above x mm 200 250 300 350 400 500 500 500
Table 36 Specifications and dimensions of the safety valve for UNIMAT UT-L boilers
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