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Safety valve LESER 437

Safety valve LESER 437
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  • Nominal inlet: 3/8”-1”, DN15-DN25
  • Response pressure: 0.1-365 bar
  • Working medium pressure: 40 bar-400 bar
  • Working environment temperature: -270 to 280 °C
  • Material: 1.4104; 1.4404

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  • Dimensions and weights
  • Design pressures and temperatures
  • Throughput (Steam)
  • Throughput (Air)
  • Throughput (Water)
  • Delivery
  • Payment
Threaded connection

Standard design Long version
Outlet body size 1 / 2´´ 3 / 4´´ 1 1 / 2´´ 3 / 4´´ 1 1 / 2´´ 3 / 4´´ 1
Fact. dia. holes d0 [mm] ten ten ten 6 6 6 ten ten ten
-
Weight [kg] 1,2 1.6 1.6 1.4 2.1 2.1 1.4 2.1 2.1
Diameter required for installation [mm] 65 80 80 65 80 80 65 80 80
Internal thread at the entrance
DIN ISO 228-1 center to end surface [mm] Entrance a 45 55 55 45 55 55 45 55 55
Output b thirty 37 37 thirty 37 37 thirty 37 37
Height [mm] H max. 210 220 220 230 240 240 230 240 240
ISO 7-1 / BS 21 center to end surface [mm] Entrance a 45 55 55 45 55 55 45 55 55
Output b thirty 37 37 thirty 37 37 thirty 37 37
Height [mm] H max. 210 220 220 230 240 240 230 240 240
ANSI / ASME B.1.20.1 Center to End surface [mm] Entrance a 45 55 55 45 55 55 45 55 55
Output b thirty 37 37 thirty 37 37 thirty 37 37
Height [mm] H max. 210 220 220 230 240 240 230 240 240
Male inlet thread
DIN ISO 228-1 center to end surface [mm] Entrance a 33 33 36 33 33 36 33 33 36
Output b thirty 37 37 thirty 37 37 thirty 37 37
ISO 7-1 / BS 21 center to end surface [mm] Entrance a 31 31 34 31 31 34 31 31 34
Output b thirty 37 37 thirty 37 37 thirty 37 37
ANSI / ASME B.1.20.1 Center to End surface [mm] Entrance a 31 31 34 31 31 34 31 31 34
Output b thirty 37 37 thirty 37 37 thirty 37 37
Male thread height at the entrance

Standard design Long version
Inlet thread The size 3 / 8´´ 1 / 2´´ 3 / 4´´ 1 3 / 8´´ 1 / 2´´ 3 / 4´´ 1
DIN ISO 228-1 [mm] H max. 210 212 214 216 230 232 234 236
ISO 7-1 / BS 21 [mm] H max. - 215 216 219 - 235 236 239
ANSI / ASME B.1.20.1 [mm] H max. - 218 218 223 - 238 238 243
Length of the inlet end with an external thread (dimension "c")
Inlet thread The size 3 / 8´´ 1 / 2´´ 3 / 4´´ 1
DIN ISO 228-1 [mm] H max. 12 fourteen 16 eighteen
ISO 7-1 / BS 21 [mm] H max. - 19 twenty 23
ANSI / ASME B.1.20.1 [mm] H max. - 22 22 27

схема LESER 437

Flange connection

Standard design Long version
Fact. dia. holes d0 [mm] 6 ten 6 ten
DIN ISO 1092-1

Flange rating Py40
Center to end. surface [mm] Entrance a 100 100 100 100
Output b 100 100 100 100
Height [mm] H max. 263 263 284 284

Flange rating ≥ Py160
Center to end. surface [mm] Entrance a 103 103 103 103
Output b 100 100 100 100
Height [mm] H max. 266 266 287 287
ASME B 16.5

Flange class 150
Center to end. surface [mm] Entrance a 100 100 100 100
Output b 100 100 100 100
Height [mm] H max. 263 263 284 284

Flange class ≥ 300
Center to end. surface [mm] Entrance a 103 103 103 103
Output b 100 100 100 100
Height [mm] H max. 266 266 287 287
Weight
Net weight (without inlet and outlet flange) [kg] 2.4 2.4 2.8 2.8

конструкция LESER 437

Fact. dia. holes d0 [mm] 6 ten
Body material: 1.4104 (430)
Base / Housing Entrance Chamber Connection size 3 / 8´´ 1 / 2´´ 3 / 4´´ 1 3 / 8´´ 1 / 2´´ 3 / 4´´ 1
Design pressure PN 400 PN 250
Outlet housing Design pressure PN 160 PN 160
Minimum set pressure p [bar] 180 [steam / gas only] 0.1
Maximum set pressure p [bar] 365 [steam / gas only] 10, only H3 180
Temperature according to DIN EN min. [0C] -ten -ten
Max. [0C] +220 +220
Body material: 1.4404 (316L)
Base / Housing Entrance Chamber Connection size 3 / 8´´ 1 / 2´´ 3 / 4´´ 1 3 / 8´´ 1 / 2´´ 3 / 4´´ 1
Design pressure PN 400 PN 250
Outlet housing Design pressure PN 160 PN 160
Minimum set pressure p [bar] 180 [steam / gas only] 0.1
Maximum set pressure p [bar] 365 [steam / gas only] 10, only H3 180
Temperature according to DIN EN min. [0C] -270 -270
Max. [0C] +280 +280
Fact. dia. holes d 0 [mm] 6 ten
Set pressure [bar] Throughput [kg / h]
0.1 In this setting pressure range, operation in saturated steam environment is not permissible. 12
0.2 17
0.5 29
1 43
2 70
3 94
4 118
5 141
6 164
7 186
eight 209
nine 232
ten 255
12 301
fourteen 346
16 392
eighteen 437
twenty 483
22 528
24 573
26 619
28 666
thirty 712
32 758
34 803
36 849
38 896
40 943
42 990
44 1038
46 1085
48 1133
50 1181
60 1421
70 1670
80 1921
90 2185
100 2451
110 2735
120 3032
130 3345
140 3688
150 4044
160 4445
170 4880
180 5401
Fact. dia. holes d 0 [mm] 6 ten
Set pressure [bar] Throughput [m 3 / h under normal conditions]
0.1 - fourteen
0.2 - 19
0.5 - 34
1 - 51
2 - 84
3 - 115
4 - 145
5 - 174
6 - 204
7 - 233
eight - 262
nine - 292
ten - 321
12 - 380
fourteen - 439
16 - 498
eighteen - 556
twenty - 615
22 - 674
24 - 733
26 - 792
28 - 851
thirty - 909
32 - 968
34 - 1027
36 - 1086
38 - 1145
40 - 1204
42 - 1262
44 - 1321
46 - 1380
48 - 1439
50 - 1498
60 - 1792
70 - 2086
80 - 2380
90 - 2674
100 - 2969
110 - 3263
120 - 3557
130 - 3851
140 - 4145
150 - 4439
160 - 4734
170 - 5028
180 - 5322
190 2911 -
200 3064 -
210 3216 -
220 3369 -
230 3521 -
240 3674 -
250 3826 -
260 3979 -
270 4131 -
280 4284 -
290 4436 -
300 4589 -
310 4741 -
320 4894 -
330 5046 -
340 5199 -
350 5351 -
360 5504 -
370 5656 -
380 5809 -
Fact. dia. holes d 0 [mm] 6 ten
Set pressure [bar] Throughput [10 3 kg / h]
0.1 Not TUV approved, applicable for thermal expansion protection 0.63
0.2 0.77
0.5 1.08
1 1.5
2 2.1
3 2.5
4 2.9
5 3.3
6 3.6
7 3.9
eight 4.1
nine 4.4
ten 4.6
12 5.1
fourteen 5.5
16 5.9
eighteen 6.2
twenty 6.6
22 6.9
24 7.2
26 7.5
28 7.8
thirty eight
32 8.3
34 8.6
36 8.8
38 nine
40 9.3
42 9.5
44 9,7
46 9.9
48 10.2
50 10.4
60 11.4
70 12.3
80 13.1
90 13.9
100 14.7
110 15.4
120 16.1
130 16.7
140 17.4
150 eighteen
160 18.5
170 19.1
180 19.7
  • Pickup from a warehouse in Kiev
  • New Mail
  • SAT
  • Deliveri
  • Courier in Kiev
  • Cashless payment with VAT
  • Online Privat24, Visa / MasterCard
Safety valve LESER 437

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