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Critical Service

Type 449

Type 449 is a component-tested safety valve for protection against toxic media, often also in connection with corrosion.

Type 449 is characterised by:

– a duct system for flushing with protective gas

– balanced bellows for back pressure compensation and to protect the bonnet space.

– manufacture of the body components as well as most inner components of rod or forged material in order to realise customer-specific material requirements, nominal pressure ratings, flange drillings and facings, and centre to face dimensions.

Approvals

Industries

  • Chemical Industry (Chlorine manufacture and processing; Chemical plants and pipelines; Reduced media such as acids or lyes)
Product info Metric unit US unit

Key feature

Block body valve with flushing protective gas, all special materials available

Block body valve with flushing protective gas, all special materials available

Nominal diameter inlet

DN 25  -  DN 100 1"  -  4"

Nominal diameter outlet

Orifice

G - N G - N

Pressure

Actual orifice diameter d0

23  -  92 mm 0,91  -  3,62 in

Actual orifice area A0

416  -  6648 mm² 0,645  -  10,304 in²

Pressure

0,1  -  16 bar 1,45  -  232 psig

Temperature acc. to DIN EN

-270  to  450 °C -121  to  392 °F

Temperature acc. to ASME

currently no approvals acc. to ASME Sec. VIII Div. 1 currently no approvals acc. to ASME Sec. VIII Div. 1

Body material

Acc. to customer preference all materials available

Acc. to customer preference all materials available

KUB-Materials

Valve connection

Flange acc. to
DIN EN 1092-1
ASME B 16.5

Flange acc. to
DIN EN 1092-1
ASME B 16.5

Bellows

Stainless steel

Stainless steel

Type of loading

Spring loaded

Spring loaded

Approvals

On request

On request

Specials

Currently no approvals acc. to ASME

Currently no approvals acc. to ASME

Feature Option Code Schematic drawing
Disc

Metal sealing, with detachable lifting aid

J26 (Standard) 

 
Bellows

Balanced bellows

J78 (Standard)

with special material Hastelloy

-

  • Bellows
Caps and levers

Caps H2

Packed lever H4

Spring

corrosive resistant 1.4310

X04

  • Spring
Test gag    
Lift indicator    
Lift stopper

Lift stopper

J51

 
Connections outlet    
Free of oil and grease

J85

Gas-masking

Gas-masking

 
Special materials

Hastelloy® C4/ 2.4610

Monel® 400/ 2.4360

Duplex / 1.4462

Documentation    
Balanced Piston    
   
   
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