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4HK1T Diesel Engine Valve Seat OEM 8-98028-874-0 8-98028-875-0
The 4HK1T Diesel Engine Valve Seat is a critical component used in the Isuzu 4HK1T engine. The valve seat is part of the engine's cylinder head and plays a significant role in the proper operation of the engine's intake and exhaust valves.
Features and functions of the 4HK1T Diesel Engine Valve Seat:
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Material and Construction: Valve seats are typically made from heat-resistant materials, such as alloyed cast iron or special alloys, to withstand the high temperatures and pressures generated during combustion. These materials are chosen for their durability and resistance to wear and erosion.
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Sealing Function: The valve seat provides a mating surface for the engine's intake and exhaust valves. It creates a secure seal when the valves close during the compression and power strokes, preventing the escape of combustion gases into the cylinder head.
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Heat Dissipation: Valve seats help dissipate heat generated during combustion, maintaining the appropriate temperature within the combustion chamber.
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Guiding Function: The valve seat guides the movement of the valves, ensuring that they open and close accurately during the engine's four-stroke cycle. Proper alignment and smooth operation of the valves are critical for engine performance.
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Load Distribution: Valve seats evenly distribute the loads and forces generated during the engine's operation, preventing uneven wear on the valve seats and the valves themselves.
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Wear Resistance: Valve seats are designed to resist wear and erosion, particularly in high-performance and heavy-duty applications. They are often hardened or coated to enhance their longevity.
Not Easy to Deform and Ageing:
The valve seat ring ring is designed to withstand high-temperature environments, ensuring long-term stability and reliability. The materials and manufacturing process used in the production of the valve seat ring ring are carefully selected to ensure that it can withstand high temperatures without deforming or aging. This high-temperature resistance is essential for ensuring that the valve seat ring ring can maintain its shape and function effectively over time, even in the most demanding operating conditions. Additionally, the valve seat ring ring’s high-temperature resistance helps to prevent damage to the engine and ensures that it can operate at peak performance levels for extended periods. With its focus on high-temperature resistance and long-term stability, the valve seat ring ring is an essential component of any high-performance engine, providing reliable and consistent performance even in the most challenging environments.
Prolong Its Life Span:
The valve seat ring ring is manufactured to the highest quality standards and optimized for maximum performance, resulting in improved engine lifespan and reliability. The high-quality manufacturing process ensures that the valve seat ring ring is durable and long-lasting, while the optimized design helps to improve its performance and efficiency. This combination of high-quality manufacturing and optimized design results in a valve seat ring ring that can significantly extend the lifespan of the engine and improve its overall reliability. Additionally, the extended lifespan of the valve seat ring ring helps to reduce maintenance costs and downtime, making it an essential component for any high-performance engine. With its focus on quality manufacturing and optimized design, the valve seat ring ring is an excellent choice for those seeking a reliable and long-lasting engine component that can withstand the rigors of heavy use.
4HK1T Diesel Engine Valve Seat Product Parameter：
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Product Name |
Engine valve seat ring |
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Application |
Diesel Engine Parts |
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OEM Number |
28.8-98028-874-0 / 8-98028-875-0 |
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Car Number |
ISUZU |
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Bore Dia. |
159.0mm |
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Engine Number |
4HK1T |
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Condition |
100% Brand-new |
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Warranty |
6 Months |
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Packing |
Neutral Packing |
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Application |
Marine, Auto, Generator Engine Use |
What is a valve seat?
The seat is a removable surface part of the valve, used to support the spool in the fully closed position, and constitutes a sealing sub. The general valve seat diameter is the maximum diameter of the valve flow. For example, butterfly valve seat material is very wide, and all kinds of rubber, plastic, and metal materials can be used as seat material.
The difference between seat, valve, and spool
The role of the three is different.
1. The role of the valve seat: used to support the spool fully closed position, and constitute a sealing sub.
2. The role of the valve: valve - spherical valve, can maximize the lift and minimize the pressure drop. Hardened to maximize the service life.
3. The role of the spool: the spool in the pressure-reducing valve is one of the main parts to achieve pressure control.
The characteristics of the three are different.
1. The characteristics of the valve seat: corrosion and wear resistance; longer working hours; high-pressure resistance; high dimensional accuracy; excellent tolerance to thrust loads and high temperatures; suitable for most passenger cars, light and heavy trucks, diesel engines, and stationary industrial engines.
2. Characteristics of valve flap: With adjustable positioning function to avoid the valve body shell wall being penetrated. The unique flip-flop check valve with a built-in flap hinge pin not only eliminates possible leakage from the hinge pin that penetrates the valve housing but also makes it possible to adjust the flap/seat when servicing the valve seat because the machined bracket is parallel to the seat surface.
3. The characteristics of the spool: When rotating the spool, the fork at the lower end of the spool drives the dynamic valve piece to rotate, making the water outlet through-hole on the dynamic valve piece and the water inlet through-hole on the static valve piece correspond to each other, and finally water flows out from the through-hole on the spool, this design is widely used at the faucet outlet.
The overview of the three is different.
1. The overview of the valve seat: the use of resilient sealing materials and small actuator thrust to obtain a bubble tight level seal, compression seat sealing stress to make the material elastic deformation and squeeze into the rough surface of the mating metal parts to block all the leakage path. The permeability of the material to the fluid is a small amount of leakage based.
2. The overview of the valve flap: skirt-type valve flap seal ring The utility model discloses a skirt-type valve flap seal ring, the structure of which is characterized by the sealing of the seal ring and the valve body for the double-edged line seal, the longitudinal section between the edge line and the edge line at the seal of the seal ring and the valve body for a trapezoidal plane space.
3. Spool overview: the spool is the valve body with the help of its movement to achieve the basic function of directional control, pressure control, or flow control valve parts
Precautions for the use of the valve seat
The use of resilient sealing materials and small actuator thrust to obtain a bubble tight level seal, compression seat sealing stress to make the material elastic deformation and squeeze into the rough surface of the mating metal parts to block all the leakage path.
If the material is too soft or has cold deformation under load (creep), you can add filler such as glass fiber to make it hard. If used to make a thin sheet, it can still meet the requirements of use and can eliminate cold deformation or permanent deformation.
Seals must be carefully fixed to prevent rupture and leakage due to differential pressure. Soft seats bonded to metal parts are a solution, but not a complete solution, because the bond will break and fail when subjected to thermal shock. A sufficiently large pressure drop will destroy the bonding material.
