CRYOGENIC
Type 06805 with bellow seal
Stainless steel bellow sealed Safety Valves, angle type, PN40, type tested TÜV-SV.1105. S/G/L
orifice d0 = 12.5 mm TÜV-SV.1105. only S/G

Standard safety valve, metal to metal seated, closed bonnet, with lifting device "cleaned and degreased for oxygen service"

Part No. 06805.X.0000
Inlet: female thread type G (BSPP) acc. to ISO 228/1, Outlet: female thread type G (BSPP) acc. to ISO 228/1
Part No. 06805.X.5000
Inlet: female thread NPT acc. to ANSI B 1.20.1, Outlet: female thread type G (BSPP) acc. to ISO 228/1
Part No. 06805.X.6000
Inlet: female thread NPT acc. to ANSI B 1.20.1, Outlet: female thread NPT acc. to ANSI B 1.20.1


Applications:
Provided as safety device for protection against excessive pressure in stationary and moveable gas cylinders and pressure vessels. Approved for non-inflammable and inflammable vapours, gases and fluids.
Working temperature: -270°C / -454°F (3K) up to +225°C / +437°F (498K) Maximum allowed back pressure: 15% of set pressure, pressure-temperature must be observed

 
Type 06805 with bellow seal
 

Materials

DIN EN

ASME/ASTM
1 Inlet body 1.4571 A 276 Grade 316Ti
2 Outlet body 1.4308 A 351 CF8
3 Disc 1.4541 A 276 Grade 321
4 Bellow 1.4571 A 276 Grade 316Ti
5 Bellow stem 1.4571 A 276 Grade 316Ti
6 Stem CW453K B 103 UNS C52100
7 Bonnet 1.4301 A 276 Grade 304
8 Spring 1.4571 A 276 Grade 316Ti
9 Lifting cap 1.4301 A 276 Grade 304
10 Lever 1.4408 A 351 CF8M
Important:
For nominal size GW 1/2, d0 = 15.0 mm the back pressure
reduces the blow off performance of the safety valve
(see diagram 06805-1/2, d0 = 15.0).

 
Type 06805 with bellow seal
 

Type 6805 Technical data
Nominal sizeGW1/21/2 3/4 3/4 1
Orificed0 12.515152023
Dimension code.X.12041504150620062310
Set pressure rangebar3.0-25.03.0-25.03.0-25.03.0-25.03.0-25.0
OutletGAG 1G 1G 1G 1-1/4G 1-1/2
HeightH205210215243295
LengthL14444445156
LengthL23535404858
Wrench size across flatsS13636414150
Wrench size across flatsS2 4141415055
Weightca. kg1.241.211.311.883.15
Coeff. of discharge vapours, gasesαw0.600.500.500.600.66
Coeff. of discharge fluidsαw -0.390.390.450.48
Dimensions in mm.



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

Medium:
Air in m³/h at 0°C and 1013.25 mbar
Water in kg/h
Saturated steam in kg/h

The capacity indicated below is for a fully opened valve.
Maximum allowed back pressure: 15% of set pressure.
For nominal size GW 1/2, d0 = 15.0 mm the back pressure reduces the blow off
performance of the safety valve (see diagram 06805-1/2, d0 = 15.0).

d0 - orifice
A0 - flow area


Set
pressure
in bar (ü)		GW1/21/2 & 3/43/411/21/2 & 3/43/411/2 & 3/43/41
d0 (mm)12.515.020.023.012.515.020.023.015.020.023.0
A0 (mm²)122.7176.7314.2415.5122.7176.7314.2415.5176.7314.2415.5
MediumAirSaturated steamWater
3.021726055580716920343363063741307518445
4.0272327697101321125454178773601509821299
5.0328394840122225330464894382291688023813
6.03834609821428295354754109790151849226085
7.043952711241635336403860125197371997328175
8.0496595126918473774529651404104092135230121
9.05516621412205441850210701557110412264731948
10.06087301557226545955111741709116382387233676
12.07208641842268054064813832011127492615136890
14.08319972127309562174515902313137702824639846
16.094211312412350970284217972615147213019742597
18.0105412652698392478394020052916156143202845181
20.01176141230114381864103722123218164583376147625
22.01289154632994799945113424203520172623540949950
25.014571749373154271067128127323975184013774653247
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