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S&R

Type 424

The product group S&R contains safety valves for requirements of local rules and regulations, e.g. for heating systems (TRD 721).

Approvals

Industries

  • Heating and Air Conditioning systems
Product info Metric unit US unit

Key feature

Safety valves for steam boilers up to 1 bar g

Safety valves for steam boilers up to 1 bar g

Nominal diameter inlet

DN 25  -  DN 150 1"  -  6"

Nominal diameter outlet

Pressure

Actual orifice diameter d0

23  -  125 mm 0,98  -  4,92 in

Actual orifice area A0

416  -  12272 mm² 0,65  -  19 in²

Pressure

0,5  -  1 bar 7,2  -  14,5 psig

Flange rating inlet

PN 16 PN16

Temperature acc. to DIN EN

 to  120 °C  to  248 °F

Temperature acc. to ASME

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

Body material

0.6025, (1.6019)

Cast steel, (SA 216 WCB)

KUB-Materials

Valve connection

Flange acc. to DIN

Flange acc. to DIN

Bellows

EPDM

EPDM

Type of loading

Spring loaded

Spring loaded

Approvals

TRD 721, PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, EAC

TRD 721, PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, EAC

Specials

Feature Option Code Schematic drawing
Bellows

Elastomer bellows EPDM

(standard)

 
Drain hole

Drain bore G1/4

J18

Drain bore G1/2

J19

 
Connections outlet    
Documentation    
Balanced Piston    
   
   
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