ANSI B2.1 pressure relief valve 444

flangecompactstainless steel

Overview
Full-lift safety relief valve with deep-drawn stainless steel body and ASME flanged connections. Suitable for systems up to 16 barg in a compact, lightweight stainless-steel design.

Delivery & Material

• Delivery time: 2 weeks for standard configurations
• Body material: stainless steel (1.4404 | SA 479 316L)

Certifications & Approvals

• CE
• ASME UV (USA)
• EAC (Russia)
• TS (China)
• UKCA

Applications & Industries
Applicable across industries up to 16 barg. Common use in textile and other process industries where compact size and high mass flow are required.

• Pressure relief within 5% pressure increase
• Often used in textile industry up to 16 barg
• Nominal sizes up to NPS 3
• High required mass flows
• Easy maintenance

Technical features Type 444 ANSI
Set pressure (according to CE): 0.1 - 16 bar | 1.5 - 232 psig
Set pressure (according to ASME): 1 - 16 bar | 15 - 232 psig
Temperature (according to CE): -45 to 200 °C | -49 to 392 °F
Temperature (according to ASME): -45 to 200 °C | -49 to 392 °F
Capacity: orifice G to N
Connections ASME B16.5: NPS 1 to NPS 3
Flange class Inlet ASME B16.5: Class 150
Body material: 1.4404 | SA 479 316L
Narrowest flow diameter d₀: 23 - 74 mm | 0.91 - 2.91 in
Narrowest flow area A₀: 416 - 4,301 mm² | 0.644 - 6.666 in²
Bellows material: No bellows available
Seat gasket: Metallic

Characteristics / technical specifications

• Set pressure (CE): 0.1 - 16 bar | 1.5 - 232 psig
• Set pressure (ASME): 1 - 16 bar | 15 - 232 psig
• Temperature (CE): -45 to 200 °C | -49 to 392 °F
• Temperature (ASME): -45 to 200 °C | -49 to 392 °F
• Capacity: orifice G to N
• Connections: ASME B16.5, NPS 1 to NPS 3
• Flange class (Inlet ASME B16.5): Class 150
• Body material: 1.4404 | SA 479 316L
• Narrowest flow diameter d₀: 23 - 74 mm | 0.91 - 2.91 in
• Narrowest flow area A₀: 416 - 4,301 mm² | 0.644 - 6.666 in²
• Bellows: not available
• Seat gasket: Metallic