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View Custom Machined Seals Materials

Standard materials for the Sealmaster 400 are listed below.

ELASTOMERS

EPDM

Black. Sulfur-cured. Weather and ozone resistant. Not resistant to mineral oil or petroleum.
Hardness: 85 Shore A
Temperature range: -16°F to +302°F (steam)
Application: Hot water, steam, diluted acids.

FPM (Viton®)

Brown. High heat, chemical resistant.
Hardness: 85 Shore A
Temperature range: -4°F to+40 0°F
Application: O-rings, multi-use.

NBR (Nitrile, Buna)

Black. Abrasion resistant. compression-set resistant..
Hardness: 85 Shore A
Temperature range: -40°F to +212°F
Application: Hydraulic, pneumatic seals.

Other options

• NBR (white)
• H-NBR
• H-NBR (FDA approved)
• T-NBR (Low-temp)
• EPDM (FDA-approved)
• MVQ (Silicone)
• MVQ (Silicone FDA-approved)
• FPM (FDA-approved Viton®)
• TFE/P (Aflas®)


Plastics

PA (Nylon)

Dark gray. High pressure, extrusion resistant.
Hardness: 85 Shore D
Temperature range: -40°F to +212°F
Application: Guide rings, back-up rings

POM (Acetal)

White. High pressure, extrusion resistant.
Hardness: 85 Shore D
Temperature range: -40°F to +212°F
Application: Guide rings, back up rings

HPU (Polyurethane)

Red. Extremely abrasion resistant, extrusion and water resistant.
Hardness: 95 Shore A
Temperature range: -31°F to +230°F
Application: Hydraulic seals

Other Options

• CHPU (Cast Urethane-96A)
• CHPU (Cast Urethane-55D)
• CHPU (Cast Urethane-72D)
• LTPU (Low-temp Urethane)
• HTPU (Hi-temp Urethane)
• SLPU (with solid lubricants)
• Polypropylene
• UHMWPE
• Polyethylene
• 745 PEEK™


Filled PTFE

700

White. Inert. Chemical resistant. High friction. Food compatible, not FDA.
Hardness: 55 Shore D
Temperature range: -436°F to +500°F
Application: Slow speed, Cryogenics

701 (25% Glass)

White. Highly inert. High friction. Higher extrusion resistant.
Hardness: 62 Shore D
Temperature range: -436°F to +500°F
Application: Stem guide liners, bearings

702 (15% Glass 5% Moly)

Gray. Extreme extrusion resistance. High tear strength.
Hardness: 58 Shore D
Temperature range: -450°F to +550°F
Application: Dynamic sealing, high-temp

741 (40% Bronze)

Brown with pigments. Similar to 702. Excellent wear resistance. Higher specific gravity.
Hardness: 60 Shore D
Temperature range: -328°F to +500°F
Application: Hydraulics, high speed.

Other Options

• ETFE (Tefzel®)
• PCTFE
• 703 PPS Carbon, Moly/PTFE
• 706 (15% Glass/PTFE)
• 711 (25% Carbon/PTFE)
• 713 (60% Bronze/PTFE)
• 716 (15% Graphite/PTFE)
• 734 (10% Carbon/PTFE)
• 755 (10% Ekonol/PTFE)
• 756 (Polyamide/PTFE)
• 771 (Mineral Moly/PTFE)
• 782 (Carbon Fiber/PTFE)
• Rulon®

 

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