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S&R

Type 440

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

Flanged safety valves for heating plants up to 120 °C acc. to DIN 4751 part 2

Flanged safety valves for heating plants up to 120 °C acc. to DIN 4751 part 2

Nominal diameter inlet

DN 20  -  DN 150 3/4"  -  6"

Nominal diameter inlet - Thread

Nominal diameter outlet

Pressure

Actual orifice diameter d0

18  -  125 mm 0,71  -  4,92 in

Actual orifice area A0

254  -  12.272 mm² 0,27  -  19,02 in²

Pressure

1  -  10 bar 14,5  -  145 psig

Flange rating inlet

PN 16 PN 16

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, (0.7043, 1.0619)

Cast steel, Ductile Gr. 60-40-18 / SA 216 WCB

KUB-Materials

Material inlet body

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
Disc

with soft sealing O-ring EPDM „D” 

J22 (Standard)

Bellows

Elastomer bellows EPDM

(Standard)

Lift stopper

Lift stopper

J51

Drain hole

Drain bore G1/4

J18

Drain bore G1/2

J19

O-ring-damper    
Connections outlet    
Free of oil and grease    
KUB bursting disc    
Documentation    
Balanced Piston    
   
   
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