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Kalrez® Spectrum™ 7075

Sold by DuPont
Polymer Name: Perfluoroelastomer (FFKM)
Physical Form: Seals, Custom, Diaphragms, O-rings, Valve Seats
Features: Good Seal Force Retention, High Temperature Resistance, Low Compression Set, Good Thermal Stability, Chemical Resistant
End Uses: Flanges, Semiconductor Applications, Pump Parts, Hot Glue Delivery Nozzle, Valves, Valve Parts
Color: Black
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TypeDocument Name
Other
Kalrez® Safe Handling Guidelines (Japanese)
Kalrez® Safe Handling Guidelines (Japanese)
Other
Brochure
Kalrez® - Contamination considerations for perfluoroelastomer seals used in deposition processes
Kalrez® - Contamination considerations for perfluoroelastomer seals used in deposition processes
Brochure
Brochure
Kalrez® Brochure
Kalrez® Brochure
Brochure
Technical Data Sheet
Kalrez® Spectrum™ 7075 Technical Data Sheet
Kalrez® Spectrum™ 7075 Technical Data Sheet
Technical Data Sheet
Brochure
Perfluoroelastomer and Fluoroelastomer Seals for Photovoltaic Cell Manufacturing Processes
Perfluoroelastomer and Fluoroelastomer Seals for Photovoltaic Cell Manufacturing Processes
Brochure
Other
Kalrez® Guide for Safety in Handling Kalrez® Perfluoroelastomer Parts
Kalrez® Guide for Safety in Handling Kalrez® Perfluoroelastomer Parts
Other
Other
Kalrez® Chemical Processing Product Selector Guide
Kalrez® Chemical Processing Product Selector Guide
Other
Other
Kalrez® Perfluoroelastomer Parts
Kalrez® Perfluoroelastomer Parts
Other
Brochure
Kalrez® Physical properties and product comparison
Kalrez® Physical properties and product comparison
Brochure
Brochure
Kalrez® Spectrum™ (German)
Kalrez® Spectrum™ (German)
Brochure
Brochure
Kalrez® Spectrum™ (Spanish)
Kalrez® Spectrum™ (Spanish)
Brochure
Brochure
Kalrez® Spectrum™ Perfluoroelastomer Parts
Kalrez® Spectrum™ Perfluoroelastomer Parts
Brochure

Knowde Enhanced TDS

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Identification & Functionality

Chemical Family
Fillers Included
Technologies

Kalrez® Spectrum™ 7075 Features & Benefits

Product Highlights
  • Kalrez® Spectrum™ 7075 has enhanced physical properties including very low compression set and improved seal force retention.
  • It is a carbon black-filled product utilizing proprietary cure chemistry.
  • Its mechanical properties are designed for improved sealing performance in both high temperature environments and temperature cycling situations.
  • Kalrez® Spectrum™ 7075 O-rings have a glossy finish.
  • This product was specifically developed for the chemical and hydrocarbon industries to provide improved chemical and thermal resistance better than the industry standard set by Kalrez® 4079.
Performance Characteristics

Thermal, Chemical, and Mechanical Performance

Kalrez® Spectrum™ 7075 is designed for general-purpose use as O-rings or custom sealing components in the chemical and hydrocarbon processing industries. It is a carbon black-filled compound with mechanical properties designed for improved sealing performance in temperature cycling applications. 7075 has improved thermal resistance that extends maximum service temperature to 327°C (620°F). It is not suggested for use in severe aqueous and amine applications where Kalrez® Spectrum™ 6375 remains the preferred compound. As always, we recommend the specific chemicals, service temperature and pressure be reviewed for the optimal compound selection in each application.

Kalrez® Spectrum™ 7075 offers very low compression set as measured by ASTM D395 to predict heat resistance. DuPont compression set testing extends the standard ASTM 70-hour protocol to include 336 and 672-hour compression set testing, which better predicts long-term O-ring performance. Lower compression set results in improved sealing and longer service life.

Figure 1. Compression Set at 204°C

DuPont Kalrez Spectrum 7075 Performance Characteristics - 1

Test method: D395B, 214 O-ring

Figure 2 : Sealing force retention at 204°C

DuPont Kalrez Spectrum 7075 Performance Characteristics - 2

Test method: ISO 3384: 1991, method A, 214 O-ring

Performance Comparison

DuPont Kalrez Spectrum 7075 Performance Characteristics - 3

Applications & Uses

Use Recommendations

Kalrez® Spectrum™ 7075, with its low compression set, is a great choice for today's smaller and lighter mechanical seals, which are expected to perform as efficiently as larger mechanical seals. The smaller mechanical seal designs, with reduced spring force retention, put additional demands on elastomeric O-rings with reduced cross sections. The smaller cross section O-rings are more prone to compression set which can reduce their functional effectiveness, thereby reducing the operability of the mechanical seal.

Quick connector couplings also benefit from the outstanding compression set of Kalrez® Spectrum™ 7075 and its enhanced temperature cycling capabilities. Combined with low swell in a wide range of chemicals, this compound ensures reliable performance of modern fluids handling systems.

Properties

Mechanical Properties
ValueUnitsTest Method / Conditions
Modulus (at 100% Elongation)11MPaASTM D 412
Tensile Strength17.2MPaASTM D 412
Elongation (at Break)138%ASTM D 412
Hardness (Shore A)75-ASTM D 2240
Compression Set (Pellet Type 1, at 204°C, 70h)10%ASTM D 395B
Compression Set (O-Ring AS568-214, at 204°C, 70h)13%ASTM D 1414
Typical Properties
ValueUnitsTest Method / Conditions
Maximum Service Temperature ¹327°C-
Lowest Service Temperature ¹-18°C-
Thermal Properties
ValueUnitsTest Method / Conditions
Glass Transition Temperature (at 10°C/min)-1.6°CASTM D 3418
Coefficient of Linear Thermal Expansion2.83E-4/°CISO 11359-1/-2
Retraction Temperature (TR-10)-4°CASTM D 1329
Other Properties
ValueUnitsTest Method / Conditions
Density1.99g/cm³ISO 1183
Note
  • [1]: DuPont proprietary test method; useful temperature range may vary with seal design and application specifics
Chemical Resistance
Chemical Resistance to

Kalrez® Spectrum™ 7075

Kalrez® Spectrum™ 4079

Kalrez® Spectrum™ 6375

Aromatic/Aliphatic Oils
Excellent

Excellent

Excellent
Acids
Excellent

Excellent

Excellent
Bases Good Good
Excellent
Alcohols
Excellent

Excellent

Excellent
Aldehydes
Excellent
Very Good Very Good
Amines Good Fair
Excellent
Ethers
Excellent

Excellent

Excellent
Esters
Excellent

Excellent

Excellent
Ketones
Excellent

Excellent

Excellent

Steam/Hot Water

Not Recommended Not Recommended Very Good
Strong Oxidizers Good Good Good

Ethylene Oxide

Very Good Not Recommended
Excellent
Hot Air
Excellent

Excellent
Very Good

Kalrez® Spectrum™ 7075
DuPont