Image shown is representative and may differ from the actual product in size, proportions, and color shade
2.380 in
(60.45 mm)
6.000 in
(152.40 mm)
4
0.750 in
(19.05 mm)
4.750 in
(120.65 mm)
1/2"
FSIL Parker LM159-70 Full Face Gasket, Size: 150#-2"-FF-1/2"
Material: FSIL Parker LM159-70 Full Face Gasket
Size: 150#-2"-FF-1/2" Full Face Gasket
Part Number: LM159-70-150#-2"-FF-1/2"
Parker Seal® (Parker)
LM159-70
Fluorosilicone (FVMQ, FSIL)
70
Shore A
Color: Blue
Detailed Description
LM159-70-150#-2"-FF-1/2" is a Blue, 70 Shore A, Fluorosilicone (FVMQ, FSIL) Full Face Gasket made from Parker Seal® (Parker). It is a 70 durometer Fluorosilicone (FVMQ, FSIL). [Parker Seal® (Parker) LM159-70 is manufactured with the following features & specifications: General Purpose Material. LM159-70-150#-2"-FF-1/2" is a size 2, 150#-FF ASME Full Face Gasket. Material: 70 Durometer FSIL Parker LM159-70 Full Face Gasket Size: 150#-2"-FF-1/2", 2 Pipe Size X 60.45mm ID X 152.4mm OD X 4 Bolt Qty X 19.050mm Bolt Dia. X 120.650mm Bolt Circle X 1/2" Thickness
| Technical Specification | Value |
|---|---|
| Compound Number | LM159-70 |
| Brand | Parker Seal® (Parker) |
| Material | Fluorosilicone (FVMQ, FSIL) |
| Color | Blue |
| Durometer | 70 Shore A Hardness |
| High Temperature | 177 °C / 351 °F |
| Low Temperature | -73 °C / -99 °F |
| Geometry Specifications | |
| Type | Full Face Gasket |
| Size | 150#-2"-FF-1/2" |
| Pipe Size | 2 |
| ID | 60.45 mm / 2.380 in |
| OD | 152.40 mm / 6.000 in |
| Bolt Qty | 4 |
| Bolt Dia. | 19.05 mm / 0.750 in |
| Bolt Circle | 120.65 mm / 4.750 in |
| Thickness | 1/2" |
Parker’s LM159-70 is a 70 Shore A blue fluorosilicone (FVMQ) compound widely regarded as a benchmark material for low-temperature fuel sealing applications. Designed for reliable performance from -100°F to 350°F (-73°C to 177°C), it maintains elasticity and sealing force in extreme cold while remaining stable at elevated temperatures. The fluorosilicone polymer combines a silicone backbone for low-temperature flexibility with fluorinated side chains that provide excellent resistance to petroleum-based fuels, oils, and greases. This balance makes LM159-70 especially well suited for modern automotive and aerospace fuel systems that experience wide thermal cycling.
LM159-70 is commonly used for O-rings and gaskets in fuel quick disconnects, fuel and air sensors, and systems handling gasoline, E85, diesel, biodiesel, and ULSD. Improvements in rebound resilience compared to earlier fluorosilicone generations support more reliable installation and automated assembly, reducing the risk of seal damage. While fluorosilicones are generally better suited for static or lightly dynamic applications, LM159-70 remains a preferred choice where low-temperature fuel compatibility is the primary requirement. Canyon Components offers equivalent fluorosilicone materials designed to match the low-temperature performance, fuel resistance, and assembly characteristics of Parker LM159-70 for automotive and aerospace sealing applications.
Common relevant keywords:
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