INDUSTRY
Type 06850, Type 06855
Safety Valves, angle type, stainless steel, type tested, TÜV-SV.1130. S/G/L

Standard safety valve metal to metal seated, "cleaned and degreased for oxygen service" closed bonnet, gastight cap or lifting device Inlet: male thread type G (BSPP) acc. to ISO 228/1 Outlet: female thread type G (BSPP) acc. to ISO 228/1

Part No. 06850.X.000000M (Pmax 250.0 bar)
Part No. 06850.X.000000H (Pmax 250.0 bar) stellited version
with gastight cap
Part No. 06855.X.000000M (Pmax 250.0 bar)
Part No. 06855.X.000000H (Pmax 250.0 bar) stellited version
with lifting device

Available options - on request only:

- Flange-, NPT- or Tri-Clamp connection for in- and outlet





Applications:
Provided as safety device for protection against excessive pressure in gas cylinders and pressure vessels. Approved for gases, vapours and liquids.
Working temperature: -270°C / -454°F (3K) up to +400°C / +752°F (673K) Pressure-temperature must be observed, suitable for horizontal installation from 20 bar

 
Type 06850, Type 06855
 

Materials

DIN EN

ASME/ASTM
1 Outlet body 1.4408 A 351 CF8M
2 Inlet body 1.4571 A 276 Grade 316Ti
3 Disc 1.4571 A 276 Grade 316Ti
5 Stem 1.4404 A 276 Grade 316L
6 Bonnet 1.4408 A 351 CF8M
7 Spring 1.4571 A 313 Grade 316Ti
8 Cap 1.4408 A 351 CF8M
9 Lifting cap 1.4408 A 351 CF8M
10 Lever 1.4301 A 276 Grade 304
Spare Parts
2 Inlet body 1.4571 316Ti
3 Disc 1.4571 316Ti
3.1 Split pin 1.4310 301
11 Gasket 1.4404 Graphite 316L Graphite
12 Gasket PTFE
13 Gasket PTFE
14 O-ring FPM (VITON)

 
Type 06850, Type 06855
 

Type 06850, 06855Technical data
Orifice[mm] 1014
InletGW1/23/413/43/43/4111
OutletGW11111-1/41-1/211-1/41-1/2
Dimension code.X.102410341044143414351436144414451446
HeightH305.0307.0309.0310.5310.5310.5312.5312.5312.5
LengthL153.053.053.055.055.055.055.055.055.0
LengthL244.544.544.548.248.248.248.248.248.2
LengthA114.016.018.016.016.016.018.018.018.0
Weight 06850ca. kg3.23.23.23.43.43.43.43.43.4
Weight 06855ca. kg3.43.43.43.63.63.63.63.63.6
coefficient of dischargeαw S/G0.840.840.840.700.700.700.700.700.70
coefficient of dischargeαw L0.680.680.68******
Min. set pressurebar-g0.50.50.50.50.50.50.50.50.5
Max. set pressurebar-g250.0250.0250.0200.0200.0200.0200.0200.0200.0
Min. temperature°C-270-270-270-270-270-270-270-270-270
Max. temperature°C+400+400+400+400+400+400+400+400+400
Dimensions in mm. * 0.20-11.50 bar=0.50 / 11.51-74.99 bar=0.49 / 75.00-200.00 bar=0.46




Type 06850, 06855
Technical data
Orifice
[mm]
18
Inlet
GW
1
1
1-1/4
1-1/4
1-1/2
1-1/2
Outlet
GW
1-1/2
2
1-1/2
2
1-1/2
2
Dimension code
.X.
1846
1847
1856
1857
1866
1867
Height
H
304.0
304.0
304.0
304.0
306.0
306.0
Length
L1
60.0
63.0
60.0
63.0
60.0
63.0
Length
L2
49.0
53.0
49.0
53.0
49.0
53.0
Length
A1
18.0
18.0
20.0
20.0
22.0
22.0
Weight 06850
ca. kg
3.9
4.1
3.9
4.1
4.0
4.2
Weight 06855
ca. kg
4.1
4.3
4.1
4.3
4.2
4.4
coefficient of discharge
αw S/G
0.76
0.76
0.76
0.76
0.76
0.76
coefficient of discharge
αw L
0.50
0.50
0.50
0.50
0.50
0.50
Min. set pressure
bar-g
0.5
0.5
0.5
0.5
0.5
0.5
Max. set pressure
bar-g
110.0
110.0
110.0
110.0
110.0
110.0
Min. temperature
°C
-270
-270
-270
-270
-270
-270
Max. temperature
°C
+400
+400
+400
+400
+400
+400
Dimensions in mm.

Pressure-Temperature Rating



Discharge capacities
Calculation of flow rate acc. to AD2000-Merkblatt A2 / DIN EN ISO 4126-1

Medium:
A = Saturated steam in kg/h
B = Air in m³/h at 0°C and 1013,25 mbar
C = Water in kg/h at 20°C

The capacity indicated below is for a fully opened valve.

d0 - orifice
A0 - flow area


Set
pressure
in bar (ü)		GW1/2, 3/4 & 13/4 & 11, 1-1/4 & 1-1/2
d0 (mm)10.014.018.0
A0 (mm²)78.5153.9254.0
MediumABCABCABC
0.547562075819630351271525018
1.07088285211614641101912426794
2.0112143403318523658133204079608
3.01521944940248317711944457011768
4.01892445704309398822055571513588
5.02272946377370480919066586215192
6.0264344698643156110068774100716642
7.0301393754549264210874882115317976
8.0338444806655272611625990130219217
9.03754948556612807123301098144820383
10.04115459018671890129971205159821485
15.0593794110459681298156001738232926314
20.077410541275412641721180132269308930385
30.0114015721562018612568220623341460937213
40.0151020991803724663428254754425615242970
50.0188226342016630754302284815518772048042
60.0225631752209136855186312006614930852628
70.02631372323861429760813370077121091456845
80.03009427725508491469853382188191253760769
90.03394483527055554378983587299491417464456
100.037915397285196191881437813111121582067942
110.042025931299116864968839658123191738771258
120.0462965133124175611063741422---
140.0552076423374490161248244741---
160.06448875836074-1430547830---
180.07575984738262-1608350731---
200.0-1089840332-1780153475---
220.0-1193142300------
240.0-1298344181------
250.0-1352245092------
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