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BP-011 · Relief valve
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A
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D
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408
95
Ø115
105
L=110.0
19
10
13
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4
1
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23
14
15
B
C
AXIAL SECTION
SCALE 1:2
h=0.00
2
3
5
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9
DETAIL B
NOZZLE, DISC AND GUIDE · SCALE 2:1
18
21
8
16
17
22
DETAIL C
SETTING AND LIFTING GEAR · 1:1
8.5
9.0
9.5
10.0
10.5
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2
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5
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VESSEL PRESSURE p, bar g
LIFT h, mm
BLOWDOWN 10 %
RESEAT 8.99
SET 10.00
DIAGRAM 1
LIFT AGAINST PRESSURE · ACCENT: LAST CYCLE · DASHED: UNSTABLE
−30
−25
−20
−15
−10
−5
0
9.0
9.5
10.0
10.5
TIME t, s (NOW AT RIGHT)
p, bar g
DIAGRAM 2
RECEIVER PRESSURE · DASHED: SET AND RESEAT
0
2
4
6
0
1000
2000
3000
LIFT h, mm
DISCHARGE, kg/h
THROAT
DIAGRAM 3
DISCHARGE · THIN: AT SET
NOTES
1. SET 10.0 bar g = PRELOAD 445 N ON SEAT Ø24 (452 mm²); k 26.1 N/mm.
2. SIMMERS FROM 9.84; GAS IN HUDDLING CHAMBER Ø31 POPS THE DISC.
3. RESEATS AT 8.99: BLOWDOWN 10 %. FULL LIFT 6 mm ≥ d0/4.
4. AIR, CHOKED, Kdr 0.77: 3270 kg/h AT +10 %. RECEIVER 500 L,
5. COMPRESSOR 360 kg/h. SPINDLE, SCREWS, STUDS, NUTS NOT CUT.
ITEM
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DESCRIPTION
BODY DN25 PN40 × DN40 PN16
NOZZLE d0 23, M42×2
ADJUSTING RING M34×1.5
RING LOCK SCREW M10×25 ISO 4028
DISC Ø30, SEAT Ø24
DISC HOLDER, SKIRT Ø31
GUIDE
SPINDLE Ø14/Ø12
SPLIT RING
BONNET
STUD M12×42 EN 1515-1
HEX NUT M12 ISO 4032
GASKET Ø124×Ø76×1.5
LOWER SPRING PLATE
SPRING d6 D46 n5 L0 127
UPPER SPRING PLATE
ADJUSTING SCREW M24×2
LOCK NUT M24×2 ISO 8675
CAP
LIFTING LEVER
LEVER PIN Ø8×40 ISO 2338
LIFTING NUT M12 ISO 4035
DRAIN PLUG G1/4 DIN 910
MATERIAL
GP240GH (1.0619)
X6CrNiMoTi17-12-2
X2CrNiMo17-12-2
A4-70
X39CrMo17-1
X2CrNiMo17-12-2
X20Cr13
X20Cr13
X10CrNi18-8
GP240GH (1.0619)
25CrMo4
C35E, CLASS 8
GRAPHITE, 316 INSERT
C45E
EN 10270-2 VDSiCr
C45E
X20Cr13
STEEL 05
EN-GJS-400-18
S235JR
C45E
STEEL 04
11SMnPb30
QTY
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TITLE
RELIEF VALVE · AXIAL SECTION
DWG NO
BP-011
SCALE
1:2
SIZE
A2
SHEET
1 / 1
DRAWN
CLAUDE
DATE
2026-10-15
MATERIAL
SEE PARTS LIST
GENERAL TOL.
ISO 2768-m
UNITS
mm · bar (gauge)
LIVE · DRAG = VESSEL PRESSURE · ← → ADJUSTING SCREW · SPACE COMPRESSOR · S SLOW
Drag ↕ vessel pressure ·
↑
↓
pressure ·
←
→
adjusting screw ·
Space
compressor ·
S
slow
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paper
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