CRYOGENIC
Type 06421
Cryogenic Safety Valves, angle type, bronze, PN40
d0=7,0 & 10,5mm up to PN50,
type tested TÜV-SV.1111. S/G


Standard safety valve, with PCTFE valve seal (except d07, which is metal to metal seated only: in this case the

Part No.
changes from
06421.X.X000
to
06421.070X.X100
), closed bonnet "cleaned and degreased for oxygen servive"

Part No. 06421.X.0000
Inlet: female thread type G (BSPP) acc. to ISO 228/1 Outlet: female thread type G (BSPP) acc. to ISO 228/1


Applications:
Provided as safety device for protection against excessive pressure in stationary and moveable gas cylinders and pressure vessels. Approved for air gases, vapours and cryogenic liquefied gases incl. LNG.
Working temperature: -196°C / -321°F (77K) up to +185°C / +365°F (458K), with PCTFE-seal up to +150°C / 302°F (423K), suitable for horizontal installation

 
Type 06421
 

Materials

DIN EN

ASME/ASTM
1 Outlet body CC491K SB 62 UNS C83600
2 Inlet body 1.4301 SA 479 Grade 304
3 Valve seal PCTFE 1.4571 1.4541 A 313 Grade 316Ti (d07) A 276 Grade 321 (d010.5)
4 Disc CC493K B 505 UNS C93200
5 Guide plate CW493K B 505 UNS C93200
6 Stem CW453K B 103 UNS C52100
7 Spring 1.4571 A 313 Grade 316Ti
8 Bonnet 1.4301 A 276 Grade 304
9 Spring clamp CW614N B 455 UNS C38500
10 Thread ring CW614N B 455 UNS C38500
11 Cap CW614N B 455 UNS C38500

 
Type 06421
 

Type 06421Technical data
Nominal sizeGW 1/21/2 3/411-1/4
Orificed07.010.514.018.023.0
Dimension Code.X.07041004140618102312
Set pressure rangebar0.4-50.00.4-50.00.4-40.00.4-40.00.4-10.0
OutletGA111-1/41-1/21-1/2
HeightH145145164195200
LengthL13636504848
LengthL241.541.54959.565
Wrench size across flatsS1 3636415050
Wrench size across flatsS2 4141505858
Weightca. kg0.800.7951.251.871.79
Coeff. of discharge from 3.0 barαw0.780.690.660.660.54
Dimensions in mm.



Discharge capacities

Medium:
Air in m³/h at 0°C and 1013.25 mbar
Air in SCFM at 60°F (15.6°C) and 14.7 psia (1013.25 mbar)

The capacity indicated below is for a fully opened valve.

d0 - orifice
A0 - flow area

Calculation of discharge capacity acc. to AD2000-Merkblatt A2 / DIN EN ISO 4126-1 resp. ASME Code Sec. VIII.

Set
pressure
in bar (ü)		GW1/21/23/411-1/4
d0 (mm)7.010.514.018.023.0
A0 (mm²)38.4886.59153.94254.47415.48
MediumAir in m³/h
0.4244377123157
0.5274987141179
1.04177131216287
1.554101179291376
2.066126219362473
3.088176299495661
4.0111221375621829
5.01342664537481000
6.01563115298751169
7.017935660610011337
8.020240268411311511
9.022544776112581680
10.024849483913871853
12.02935849931641-
14.033967411471895-
16.038476513002149-
18.043085514542403-
20.048095416232683-
22.0525104617782939-
24.0571113719333196-
26.0617122820883452-
28.0663131922443709-
30.0715142424214003-
32.0762151625784262-
34.0808160827354520-
36.0854170028914779-
38.0900179230485038-
40.0955190132325343-
42.010021994---
44.010482086---
46.010952179---
48.011422272---
50.011982385---

Set
pressure
in psig		GW1/21/23/411-1/4
d0 (inch)0.2760.4130.5510.7090.906
A0 (in²)0.0600.1340.2390.3940.644
MediumAir in SCFM
15--92--
28--129-298
2942---304
354790154-346
4052100169280382
5062118201333454
6072137233385525
7082156265438597
8092174296490669
90101193328543740
100111212360595812
120131249424700955
1451552965038311134
160170324551910-
1801903616141015-
2202294367411225-
2402494738051330-
2502584928361383-
2602685118681435-
2802885489321540-
3003075859951645-
32533263210751777-
35035767911541908-
37538172512332039-
40040677213132170-
42543081913922302-
45045586514722433-
47547991215512564-
50050495916302695-
525528100617102827-
550553105217892958-
575577109918683089-
6006021146---
6256261192---
6506511239---
6756751286---
7007001332---
7257241379---
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