Ashcroft® Introduces 502 and 503 All-Welded Flanged Diaphragm Seals for Hazardous Process Environments
Stratford, CT — July 07, 2026 — Ashcroft®, a global leader in industrial measurement and control solutions, today announced the introduction of the Ashcroft® 502 and 503 All-Welded Flanged Diaphragm Seals. Engineered to isolate sensitive instruments from hazardous and corrosive process media in the most demanding applications including sour gas separation and biogas and biodiesel processes.
The new seals feature a one-piece, fully all-welded construction that eliminates non-metallic components within the seal assembly, significantly reducing potential leak paths in installations where process integrity and personnel safety are critical.
The standard diaphragm design accommodates a wide range of pressure ratings regardless of pipe diameter, giving engineers flexibility across process connection sizes from ½ to 1½ NPS and flange ratings from 150 to 1,500 class per ASME B16.5. Material traceability reports (MTR per EN 10204 3.1) and positive material identification (PMI) are included as standard with every unit, providing the documentation required for critical process and NACE-compliant environments.
“These new flanged seals complete Ashcroft’s all-welded diaphragm seal lineup,” said John Girard, Business Development Lead, Process Oil & Gas and EPC at Ashcroft. “For engineers working in refineries, sour gas separation, or biogas environments, the 502 and 503 deliver the combination of leak integrity, material certification, and broad pressure capability they need to protect both their instruments and their processes.”
The 502 and 503 seals are available with a wide range of wetted diaphragm and flange materials. For full material options and detailed technical specifications, view the product page.
Key Features
• Standard Material Traceability Reports (MTRs) and Positive Material Identification (PMI)
• Standard diaphragm design supports a range of pressure ratings regardless of pipe diameter
• Available in ASME B16.5 Class 150, 300, 600, 900 and 1500 configurations
• Process connection sizes from ½ to 1.5 NPS
• Typical added tolerance of ±0.5%
About Ashcroft
Ashcroft, Inc., headquartered in Stratford, Connecticut, is a global leader in pressure, temperature and test instrumentation serving critical industries, including energy, oil and gas, water, pharmaceutical, data center, semiconductor, heavy vehicle and industrial manufacturing markets. With over 1,100 employees worldwide, Ashcroft has been recognized for its engineering expertise, product reliability and long-term commitment to customer success. Visit www.ashcroft.com for more information.
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