S&R

Type 440

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

Approvals

LESER S&R safety valves or Type 440 are designed, marked, produced and approved according to the requirements of the following regulations:

Technical specifications Type 440

Nominal Diameter at Inlet
DN 20 - DN 150 | 3/4" - 6"
Actual Orifice Diameter d₀
18 - 125 mm | 0.71 - 4.92 in
Actual Orifice Area A₀
254 - 12272 mm² | 0.27 - 19.02 in²
Pressure
1 - 10 bar | 14.5 - 145 psig
Flange Rating Inlet
PN 16 | PN 16
Temperature (in accordance with DIN EN)
up to 120 °C | up to 248 °F
Body Material
0.6025, (0.7043, 1.0619) | Cast steel, Ductile Gr. 60-40-18 / SA 216 WCB
Valve Connection
Flange acc. to DIN
Bellows Material (optional)
EPDM
Load Type
Spring loaded
Approvals
TRD 721, PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, EAC

Contact LESER

Send a message to LESER

Contact

Contact finder

Your local contact person will support you with all questions concerning the safety valve.

Find your local contact

You may also like