Water back-pressure regulator L72

gasspringstainless steel 316L

Product overview
The IMI Maxseal L72 Series 3/4 inch back pressure regulator provides accurate upstream pressure control for demanding high and low pressure gas and liquid applications. Supports inlet/working pressures up to 414 barg and uses a 12.5 mm valve seat to stabilise upstream pressure as flow and inlet conditions vary. Tight shutoff meets ANSI FCI 70-3 Class VI and API 598. Standard connections are 3/4 inch NPT or BSPP with integrated gauge ports and a vent. Body and trim are 316L stainless steel and multiple seal materials are available for different media and temperatures.

Key benefits

• Precise back pressure control up to 414 barg across a wide operating range.
• Stable upstream pressure via 12.5 mm seat design under varying flow and inlet conditions.
• Suitable for severe service with 316L stainless steel construction and Class VI tight shutoff.
• Compatible with both gas and liquid media.
• Seal material and low-temperature options available for harsh or cold environments.

Features

• Back pressure control up to 414 barg.
• Gas and liquid compatible.
• Class VI tight shutoff (ANSI FCI 70-3) and API 598 testable shutoff.
• 316L stainless steel body and trim.
• ATEX and PED compliant; NACE option available.
• Tamper-proof adjustment and panel mounting options.
• Integrated gauge ports and vent for monitoring.
• Low temperature option to -50 °C.

Construction & options
The regulator features a 316L stainless steel body and trim. Seal material options include NBR, FKM, EPDM and Low Temperature NBR. Standard process connections are 3/4 inch NPT or BSPP. Options include tamper-proof adjustment, panel mounting, NACE compliance and ASTM G93 Level C cleaning. Loading type: spring loaded.

Technical specifications

• Loading: Spring loaded
• Fluid types: Gas; Liquid
• Port size: 3/4 inch (NPT or BSPP)
• Maximum working pressure: 414 barg
• Maximum set pressure: 414 barg
• Ambient temperature: -50 °C to 100 °C
• Body material: Stainless steel 316L
• Seal materials: NBR; FKM; EPDM; Low Temperature NBR
• Certifications: PED; ATEX; NACE