M-ring seal Type MD / MF

elastomerNBRPTFE

Product overview
The M-ring type MD / MF is an axial static sealing element designed for clamping connections according to DIN 32676 or ISO 2852, intended for hygienic process applications (food industry). Available with or without an outer collar and supplied in common elastomer and PTFE compounds to suit various media.

Compliance
Available compounds comply with FDA (21 CFR 177.2600 or 21 CFR 177.1550). Additional compound options are offered to meet BfR recommendation XXI, USP Class VI and 3-A Sanitary Standards where required.

Fields of application

• static
• dynamic
• single acting
• double acting
• linear
• rotating (inactive)
• oscillating

Main use
valves for the food industry

Materials
elastomers, PTFE

Technical values
Materials (available variants): NBR, FKM, EPDM, PTFE

Variant: NBR
Pressure: up to 16 MPa
Temperature: -30°C / +80°C (material dependent)
Speed: -

Variant: FKM
Pressure: up to 16 MPa
Temperature: -20°C / +200°C (material dependent)
Speed: -

Variant: EPDM
Pressure: up to 16 MPa
Temperature: -40°C / +130°C (material dependent)
Speed: -

Variant: PTFE
Pressure: up to 16 MPa
Temperature: -200°C / +260°C (material dependent)
Speed: -

Note: Maximum values (temperature, speed and pressure) are not simultaneously applicable; values vary depending on material and media.

Features / technical specifications

• Type: axial static sealing element for clamping connections
• Standards: DIN 32676 or ISO 2852 (for food industry clamping connections)
• Designs: with or without outer collar
• Common materials: NBR, FKM, EPDM, PTFE
• Regulatory compliance examples: FDA 21 CFR 177.2600 / 21 CFR 177.1550; options available for BfR XXI, USP Class VI, 3-A Sanitary Standards
• Maximum pressure (all listed material variants): up to 16 MPa
• Temperature ranges (material dependent): NBR -30°C / +80°C; FKM -20°C / +200°C; EPDM -40°C / +130°C; PTFE -200°C / +260°C