High PerformanceType 457, 458

Full lift safety valve with nozzle . Technical data

Applications & Industries

The Types 457 / 458 for chemical, petrochemical, energy, technical gases and general industry in heavy duty applications up to 300 barg

Set pressure(according to CE)	2.5 - 300 bar \| 36 - 4,350 psig
Set pressure (according to ASME)	2.5 - 300 bar \| 35 - 4,350 psig
Temperature(according to CE)	-85 to 550 °C \| -121 to 1,022 °F
Temperature(according to ASME)	-29 to 538 °C \| -20 to 1,000 °F
Capacity	orifice E to Q
Connections DIN EN 1092	DN 25 - DN 150
Connections ASME B16.5	NPS 1 to NPS 6
Flange class Inlet DIN EN 1092	PN 16 - PN 250
Flange class Inlet ASME B16.5	Class 150 - Class 1500
Body material	1.0619, 1.4581, 1.7357 \| SA 216 WCB, SA 351 CF10M, SA 217 WC6
Narrowest flow diameter d₀	15 - 110 mm \| 0.59 - 4.33 in
Narrowest flow area A₀	177 - 9,503 mm² \| 0.274 - 14.730 in²
Bellows material	Stainless steel
Seat gasket	Metallic, Sealing plate , o-ring