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James Walker® Gaskets & Jointings > Spiralwound & grooved metal gaskets



  Spiralwound & grooved metal gaskets
Metaflex® Spiral Wound Gaskets
 
DESCRIPTION
James Walker Metaflex® gaskets are designed to seal flanges where temperature, pressure, vibration or flow rates are beyond the capability of conventional jointing materials. They are wound in V-section metal strip and a softer filler material so that
flange surfaces are presented with a spiral of alternate metal/filler layers.

TYPICAL APPLICATIONS
Pipelines and pressure vessels on steam, petrochemical, nuclear, marine and hydraulic plant; and heatexchangers. Metaflex Lolode gaskets are recommended for flange joints
where bolt loading is limited.
PRIME FEATURES
• Gaskets are made to a wide variety of sizes and shapes.
• Combinations of metal winding strip and filler are selected to suit the fluid media and operating conditions.
• Quick to install and remove.
• Operating temperatures from cryogenic up to 1000°C.
• System pressures from high vacuum to over 350bar.
• Support rings, inside and/or outside of spiral, make gasket suitable for high line pressure on flat or raised-flange faces.

SPECIFICATIONS
Products are manufactured in accordance with all relevant gasket standards to suit flange designations: ASME B16.5, BS1560, ASME B16.47 Series A (MSS-SP44), ASME B16.47 Series B (API605), BSEN 1092 (BS4504); plus DIN, JIS and NF.

MAXIMUM OPERATING TEMPERATURES OF FILLER MATERIALS
XA ompressed non-asbestos fibre 500°C
 SPG Standard purity graphite (oxidising media)    500°C  
 SPG Standard purity graphite (inert/reducing media)    600°C  
 SPG Standard purity graphite (steam)    650°C  
 HPG High purity graphite (oxidising media)    500°C  
 HPG High purity graphite (inert/reducing media)    600°C  
 HPG High purity graphite (steam)    650°C  
 Fluolion® PTFE    260°C  
 HTF High temperature filler    1000°C  
Aluminium and lead also available.
 
OPERATING PRESSURE
Metaflex gaskets seal up to 350bar, although higher pressures can be considered.
 
METALWINDING STRIPS
Standard materials: stainless steels 304L and 316L. Other materials include: 310, 320 and 321; Monel 400 and K500; nickel 200; titanium; Inconel 600, 625 and X750; Incoloy 800 and 825; Hastelloy HB2 and C276.
 
SUPPORT RINGS
Standard material: carbon steel. Other materials include: stainless steel 304L, 316L, 320 and 321; titanium; Monel 400 and K500; nickel 200; Fluolion® PTFE (inner rings only); Duplex UNS 31803.
 
STANDARD SIZES (mm)
Nominal thickness Compressed thickness Minimum diameter Maximum diameter
 2.5    1.9/2.1    10    300  
 3.2    2.4/2.6    10    760  
 4.5    3.2/3.45    10    1520  
 7.3    4.7/4.9    60    3550  
Largest non-standard gaskets manufactured to date are 5070mm diameter.
 
HOW SUPPLIED
Almost any combination of component materials is available. Profiles include circular, obround, square, oval and diamond. Gaskets for nonstandard flanges are made to order.