SPAAL JOINTS
SPAAL gaskets | DYNAMIC's function is to statically seal fluids such as lubricants, water, gases and fuels, at the junctions between engine and equipment components. Compensating for variations in the components' contact surfaces, our joints enable perfect union between them, in addition to providing insulation or thermal/electrical conduction according to the design, as well as non-adhesion between attached parts. They can also be used to mechanically compensate for small variations in thickness in cast, molded and machined components.
New technologies used in engine designs are constantly evolving, and in the same way SPAAL | DYNAMIC seek to overcome performance limits, demanding new solutions for sealing at the highest performance levels.
Due to the high technology used and the consolidated preference of the applicator in the Heavy Line market, our gaskets and seals are a reference in performance and high performance, serving as a benchmark for several companies in the same sector, including in the original market (OEM).
The materials are selected depending on the applied torque, circulating fluid, temperature, pressure, compressibility and recovery. Some of the materials used in our joints are:
Solid Core (SC)
Fiber joints with metallic core, covered with elastomer material. Mostly used in head gaskets, exhaust manifolds, crankcases and other applications, with chemical and mechanical anchoring. In addition to having excellent thermal dissipation, they withstand high temperatures.
Our Solid Core (SC) gaskets also aim to correct the roughness and flatness imperfections of engines reworked in grinding machines, even if small. Our engineering guarantees that the engines will not be retouched, as they have adequate compressibility and recovery for each application.
Turbo Diesel (TD)
Fiber and graphite joints with reinforced metal core, covered with elastomer material. Used in head gaskets with high stress, they have excellent thermal dissipation, withstanding extreme working temperatures.
Multilayer (ML)
Metal joints with a body made up of one or several sheets of special alloy steel, with or without crease, coated or not with elastomer. They have high thermal conductivity, corrosion resistance, formability capacity and maximum sealing of fluids and gases. Applicable to head gaskets, intake and exhaust manifold gaskets where high recovery is not required.
Thermo Multilayer with Molybdenum (TM)
Steel joints, with application of a layer of anti-friction powder on their contact faces, acting as an organic lubricant, reducing friction between parts and providing a static and dynamic micro-sealing function, including between parts with different thermal expansions. It is suitable for critical applications, where temperatures can reach up to 1000°C, and is commonly used in exhaust manifolds with high thermal stress.
Metal Gaskets Injected with Elastomer (BI)
Joints with metal structure and sealing profiles injected in nitrile rubber (NBR), silicone (VMQ) or fluoroelastomer (FKM / Viton®), depending on the application. They are normally applied to head gaskets, valve covers and crankcases of newer engines.
Rubberized Cork (CB)
Material normally used in gaskets for sealing valve covers and crankcases. Parts with high compressibility, suitable for compensating for deformation of materials specified in the project and/or for distortion. Although they are still widely used today, their use is very common in older engine models.
Hydraulic Cardboard for Low and Medium Pressure (AN)
Materials used for the most diverse applications, where they must withstand low or moderate pressure and temperature, depending on the application.
Hydraulic Cardboard for High Pressure (NT)
Materials used for the most diverse applications, where they must withstand high pressure and temperature, depending on the application.
Nitrile Rubber (NBR)
Elastomer that can be molded or injected, has moderate mechanical and chemical resistance compared to Silicone and Fluoroelastomer. It is a tenacious, medium-swelling material. Material compatible with most engine applications, it is commonly used in gaskets due to its good resistance to oils, greases, heat aging, abrasion and dynamic fatigue, covering a wide range of gaskets and seals whose demands are less critical.
Silicone (VMQ)
An elastomer that can also be molded or injected, Silicone's main characteristic is that it does not lose its elasticity and recovery properties even when exposed to high temperature variations. Furthermore, it has high flexibility, low rate of permanent deformation and greater resilience, even under high pressure. Widely used in more critical joints and seals.
Fluorelastomer (FKM or Viton®)
The Fluorelastomer - popularly known as Viton® - presents exceptional performance under severe conditions of use. FKM rubber items can be molded or injected, and are indicated for applications where resistance to the highest mechanical and chemical stresses is required. It is a fundamental material in the composition of critical gaskets and seals, being ideal for sealing both fuel passages and performing very well with other fluids, preventing oxidation.
Mainly applied to head gaskets, liner rings, seals and various rings, as well as crankshaft seals and highly requested engine wheels.
Borracha Polyacrylica (ACM)
Polyacrylic Rubber is especially recommended in applications with high resistance and heat requirements, molded or injected, with hardness and resistance compatible with the application. Used in gaskets and seals due to its excellent resistance to petroleum derivatives.
Polytetrafluoroethylene (PTFE or Teflon®)
PTFE is a fluorinated polymer, making it a very high performance plastic. With high chemical resistance, it is also resistant to attack by corrosive acids, has high thermal stability with good heat resistance, low coefficient of friction and high impact resistance. Used for manufacturing retainers.