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Critical Service

Type 447

PTFE-lined safety valves from the Critical Service product group are utilized for highly corrosive media such as chlorine, acids, and lyes. With their highly resistant lining they offer a safe solution for corrosive media.

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

PTFE-full lining at the inlet and outlet area for high corrosive medium

PTFE-full lining at the inlet and outlet area for high corrosive medium

Nominal diameter inlet

DN 25  -  DN 100 1"  -  4"

Nominal diameter inlet - Thread

Nominal diameter inlet - Flange

Nominal diameter outlet

Orifice

E - P

E - P

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

Operating limits valve size

Operating limits pressure class inlet flange

Pressure

0,1  -  16 bar 1.45  -  232 psig

Flange rating inlet

PN 16 CL150

Temperature acc. to DIN EN

-85  to  200 °C -121  to  392 °F

Temperature acc. to ASME

-29  to  200 °C -200  to  392 °F

Body material

1.0406, 10619, 1.0570 + Virgin PTFE

SA 216 WCB

KUB-Materials

Material outlet body

Material inlet body

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

PTFE

PTFE

Type of loading

Spring loaded

Spring loaded

Approvals

PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, ASME Sec. VIII Div. 1, CRN, AQSIQ, EAC

PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, ASME Sec. VIII Div. 1, CRN, AQSIQ, EAC

Specials

Feature Option Code Schematic drawing
Disc

with sealing plate borofloat glass

standard

with sealing plate virgin PTFE

 with sealing plate PTFE - 25 % carbon

cc. to customer specification e.g. Hastelloy® 

Seat/nozzle    
Inlet body    
Bellows

PTFE bellows

standard

  • Bellows
Caps and levers

Caps H2

-

Packed lever H4

-

 
Spring

corrosive resistant 1.4310

X04

  • Spring
Test gag

for cap H2

J70

for lifting device H4

J69

Bonnet    
Heating jacket    
Lift indicator

Lift indicator lifting device H4

J39J93

Lift stopper

Lift stopper

J51

Drain hole    
O-ring-damper    
Butt-weld connection    
Connections    
Connections outlet    
Free of oil and grease

Free of oil and grease

J85

Bug screen    
NACE material test certificate    
Sparc test

Sparc test DIN 28055-2
Sparc test DIN EN 10204 2.2

-

 
LESER Surface package    
KUB bursting disc    
Solar valve for collector field    
Conductive coating

Conductive coating conductive PTFE

 
Gas-masking    
Special materials

Hastelloy® C4/ 2.4610

Monel® 400/ 2.4360

Duplex/ 1.4462

High Alloy Concept    
   
Main valve    
Pilot    
Accessories    
Box in box construction    
Heating    
Design    
Multiple valve control    
Remote lifting device    
O-ring disc    
Disc with inserted sealing plate    
Bellows Inconel    
Inconel spring    
Stainless steel spring    
High temperature equipment    
Lockable combination    
Flushing hole    
Further options Change-over-Valves    
   
Documentation    
Balanced Piston    
   
   
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