441, 442 FULL NOZZLE ANSI
Type 441, 442 Full nozzle ANSI LESER High Performance pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations:
Technical Specifications for Type 441, 442 Full nozzle ANSI
Nominal Diameter Inlet - Thread
DN 25 - DN 100 | 1" - 4"
Nominal Diameter Inlet - Flange
23 - 92 mm | 0.91 - 3.62 in
Actual Orifice Area A₀
416 - 6648 mm² | 0.644 - 10.304 in²
0.1 - 51 bar | 1.5 - 740 psig
Flange Rating Inlet
CL150 - CL300 | CL150 - CL300
Temperature (in accordance with DIN EN)
-270 to 450 °C | -454 to 842 °F
Temperature (nach ASME)
-268 to 538 °C | -450 to 1000 °F
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Flange acc. to ASME B 16.5 or acc. to JIS 2220
Bellows Material (optional)
Stainless steel and elastomer
PED/DIN EN ISO 4126-1, PED/AD 2000-Merkblatt A2, ASME Section XIII certified for Section VIII Div. 1 service, CRN, AQSIQ, EAC
LR, RINA, DNV GL, BV, ABS
Access all the necessary documents and detailed information for pressure relief valves in our download area.
There are many ways to get in touch:
Complete our online enquiry form to quickly find the most suitable product. Click Here
Email your enquiry to email@example.com together with any questions. We aim always to respond within the 24 hours.
Speak to one of the LESER UK sales engineers today: +44 (0)117 930 6113
Use the chat box and speak to someone now through the website. We'll reply as soon as we can!