Duramid®

Duramid®

Duramid®

Description
A tough, high performance packing, cross-plaited from texturised aramid yarns. Each yarn is uniformly impregnated with PTFE dispersion and a silicone-based lubricant that resists chemical attack at high temperatures.

Typical applications

Valves and pumps handling abrasive and aggressive media in pulp and paper mills, petrochemical plants, power stations, metallurgical plants, sewage works and china clay works. Also suitable for potable water, medium pressure steam, and hardening fluids such as tar and bitumen.

Specifications

  • WRAS approved for use with hot and cold potable water at up to 85°C.

Prime features

  • Suitable for a very wide range of media.
  • Excellent abrasion resistance.
  • Long service life with minimal shaft wear.
  • Resilient and responsive in operation.

Chemical properties
Compatible with media in the range pH 2-13, including water, oils, solvents, medium strength acids and alkalis.

Service capabilities – valve stem duties
Maximum operating temperature:  +250°C
Minimum operating temperature:   -50°C.
Maximum system pressure:            15MPa

Service capabilities – centrifugal pumps and rotary equipment
Maximum operating temperature:  +250°C
Minimum operating temperature:   -50°C.
Maximum shaft speed:                     20m/s (refer to James Walker for higher speed duties).
Maximum system pressure:            2.5MPa.

Service capabilities – reciprocating pumps and rams
Maximum operating temperature:  +250°C
Minimum operating temperature:   -50°C.
Maximum rod speed:                       1.5m/s.
Maximum system pressure:           15MPa.

How supplied
Ex-stock: all popular square sections from 3mm to 25mm, in boxes containing 8m. Also supplied as split preformed rings and sets. Full fitting instructions are included.

 

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