High-Temperature Alloy (HTA)

The HTA gasket is a single- or multiple-layer, high-temperature alloy substrate capable of sealing at service temperatures up to 1,000° C. Layers contain full or half embossments to provide functions that include localizing contact stress and responding to flange motion. A high-temperature coating is applied for enhanced microsealing and improved abrasion resistance.

Features and benefits include:

• Effective exhaust gas sealing at service temperatures beyond conventional material capabilities (500° C+)
• Mechanical properties of substrate materials maintained at service temperatures up to 1,000° C
• Improved gasket resiliency
• Ability to seal larger flange deflections
• Portfolio of HTA material choices tailored to operating environment conditions
• Installation features can be added (e.g., star holes, bolt holes)
• Low creep relaxation for reduced flange bending and deflection
• Improved bolt-load retention at elevated temperatures

Multi-Layer Steel (MLS)

The MLS exhaust manifold gasket has multiple layers of stainless steel substrate. Layers are embossed with full or half embossments to give them function. These include localizing contact stress and improving response to flange motion, both of which help achieve exhaust gas sealing performance. This product can also be coated for enhanced microseal and improved abrasion resistance.

Features and benefits include:

• Effective exhaust gas sealing at service temperatures up to 500° C
• Resistance to thermal and chemical degradation
• Improved gasket reliability
• Ability to seal large flange deflections
• Improved bolt-load retention at elevated temperatures

Single-Layer Steel (SLS)

SLS is a single layer of stainless steel substrate. The layer is embossed with full or half embossments to provide function. This function includes localizing contact stress and improved response to flange motion to achieve exhaust gas sealing performance. This product can also be coated for enhanced microseal and improved abrasion resistance.

Features and benefits include:

• Effective exhaust gas sealing at service temperatures up to 500° C
• Resistance to thermal and chemical degradation
• Improved bolt-load retention at elevated temperatures
• Promotes highest level of bolted joint stability

Spiral-Wound Gaskets (SWG)

SWGs are made of alternating layers of steel and filler material wound into a spiral shape. The steel windings provide structure and rigidity while the filler materials provide sealing function. Filler material typically consists of graphite or mica.

Features and benefits:

• Rigid construction provides joint stability.
• Design provides high level of exhaust sealing performance.
• Chevron shape provides strong recovery properties.

Graphite

Graphite perforated core is an expanded graphite sheet mechanically clinched to both sides of a perforated-steel carrier. Stainless steel eyelets can be integrated for localizing contact stress around the exhaust gas ports. This product can also be coated for improved microseal, antifriction or antistick.

Features and benefits include:

Hybrid Design Gasket

Hybrid design combines the beneficial characteristics of MLS and graphite. This design uses one or more embossed steel layers, a graphite layer and an optional shim layer. The graphite layer provides temperature resistance and lubricity against the exhaust manifold while the embossed steel layers accommodate joint deflection against the cylinder head.

Features and benefits:

• Smooth graphite layer reduces friction against the exhaust manifold.
• Graphite acts as thermal barrier to the active embossed steel.
• Embossed layers provide active sealing between head and manifold.
• Delivers high level of sealing performance at critical manifold-to-head joint

Fiber Composite

Fiber composite is produced with mica or fiber sheet mechanically clinched to both sides of a perforated steel carrier. Stainless steel eyelets localize contact stress around the exhaust gas ports. This product can be coated for improved microseal, antifriction or antistick.

Features and benefits:

• Effective solution for stable joints with sufficient bolt load and high flange stiffness
• Exhaust gas sealing at service temperatures up to 900° C
• Steel and fiber sheet thickness designed to fine-tune compressed thickness and stiffness