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James Walker® Gaskets & Jointings > Specification grade elastomers



  Specification grade elastomers
 
We process and/or supply many Specification Grades of elastomer as sheet jointings and precision cut gaskets.
In addition to those on this page, we have many other customer and industry specification materials that suit particular applications.
 
NATURAL RUBBER NR
• BS1154 Grades Z40, Z50, Z60, Z70, Z80 (all in black)
• Def Standard 22-006 (NES 2006) Grades OZ40, OZ50, OZ60, OZ70, OZ80 (all in black). (Declared OBSOLETE.)
 
NITRILE RUBBER NBR (Medium Nitrile)
• BS2751 Grades BA40, BA50, BA60, BA70, BA80, BA90
• BS6996 Grades BO60, BO80
• * DTD 5594A Grades 60, 70, 80, 90.
 
NITRILE RUBBER NBR (High Nitrile)
• * DTD 5509 Grades A, B, C, D
• Def Standard 22-005 (NES 2005) Grades BA(H)60, BA(H)70, BA(H)80.
(Declared OBSOLETE.)
 
CHLOROPRENE CR (Neoprene)
• BS2752 Grades C40, C50, C60, C70, C80
• ABR 4-0106 Issue 3 Grades 45, 55, 65, 75.
 
BUTYL IIR
• BS3227 Grades B60, B70.
 
ETHYLENE PROPYLENE EPDM (Terpolymer)
• BS6014 Grades EP60S, EP70S, EP80S.
 
SILICONE VMQ, PVMQ, MQ, PMQ
• * DTD 5531A Grades 50, 60, 70, 80
• * DTD 5582A (as amended) Grades 50, 60, 70, 80
• * DTD 818 Classes L2, L3, L4, L5, N2, N3, N4, N5.
 
FLUOROSILICONE FMQ
This material resists mineral and synthetic oils.
• * DTD 5583A Grade 60 is available for defence and aerospace duties where resistance to fuels and hydraulic fluid is needed. Maximum size is 300mm square. (Because of the restricted applications for this specific material, it is not included in the General Elastomers Chemical Suitability Guide.)
 
FLUOROELASTOMER FKM (Dipolymer)
• * DTD 5543B Grades 60, 70, 80, 90 (all in black or green colour)
• * DTD 5612A Grades 50, 60, 70, 80, 90 (all in black or green colour)
• Viton® polymers are supplied when specified.
 
KALREZ® PERFLUOROELASTOMER FFKM
We are UK Authorised Distributor for the design, supply and technical support of sealing and fluid handling parts made from DuPont Performance Elastomers’ Kalrez®.
This high performance elastomeric material combines the resilience and sealing ability of rubber with almost universal chemical resistance and temperature capabilities up to 316°C.
Various grades of Kalrez® are recommended for critical and/or high purity sealing applications in industry sectors as diverse as:
• Pharmaceuticals and food processing
• Semiconductor fabrication
• Oil, gas, chemical and petrochemical processing
• Defence and aerospace.
 
*All DTD specifications have been declared OBSOLETE.