Guangzhou Star Mustang Construction Machinery Parts Co., Ltd
With professional technology and sincere service, we have been respected by customers from the very beginning and enjoy a good reputation in the industry. At present, we have established a scientific
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Specification
| Applicable models | V1902 |
| Type | Valve |
| Original number | 11025-1179 |
| Warranty | 6 months |
| Engine Type | Diesel |
| Brand Name | HDPARTS |
| Condition | New |
| Size | OEM Size |
| Valve composition | The valve is composed of a valve head and a valve stem. The temperature of the valve head is very high (570~670K for the inlet valve and 1050~1200K for the exhaust valve), and it also bears the pressure of the gas, the force of the valve spring and the inertia force of the transmission components. Its lubrication and cooling conditions are poor, so the valve must have certain strength, stiffness, heat resistance and wear resistance. The inlet valve is generally made of alloy steel (chromium steel, nickel chromium steel), and the exhaust valve is made of heat-resistant alloy (silicon chromium steel). Sometimes, in order to save heat resistant alloy, the exhaust valve head is made of heat resistant alloy and the rod is made of chrome steel, and then the two parts are welded together. The shape of valve head includes flat top, spherical top and horn top. Generally, flat roof is used. Flat top valve head has simple structure, convenient manufacturing, small heat absorption area, small mass, and can be used for both intake and exhaust valves. Spherical top valve is suitable for exhaust valve. It has high strength, small exhaust resistance and good exhaust gas elimination effect, but it has large heating area, large mass and inertia, and complex processing. The horn type has a certain streamline, which can reduce the intake resistance, but its head has a large heating area and is only suitable for the intake valve. The valve cone angle is the angle of the valve sealing surface, generally 45 °, and some are 30 ° (CA1091 car 6102 engine). The 30 ° valve is considered to have a small valve taper, a large valve passing through the end face, and a small inlet resistance when the lift is the same. However, due to the thin edge of the valve head with a small taper, small stiffness, and poor sealing and thermal conductivity, it is generally used for the inlet valve. The thickness of the valve edge is generally 1~3mm to prevent it from being damaged or burnt by high temperature due to impact with the valve seat during operation. In order to reduce the intake resistance and improve the intake efficiency of the cylinder, the intake valve of most engines is larger than the exhaust valve. The used inlet valves and exhaust valves also have different colors. The valve stem is cylindrical and moves back and forth continuously in the valve guide. Its surface must be overheated and polished. The shape of the end of the valve stem depends on the fixing form of the valve spring. The common structure is that two half of the lock plates are used to fix the spring seat. The end of the valve stem has a ring groove to install the lock plate. Some are fixed with a lock pin, and its end has a hole for installing the lock pin. [1] |
| Function of valve | The valve is specially responsible for inputting air into the engine and discharging the exhaust gas after combustion. From the engine structure, it can be divided into intake valve and exhaust valve. The function of the intake valve is to suck air into the engine and mix it with fuel for combustion; The function of the exhaust valve is to discharge the waste gas after combustion and dissipate heat. |
Product Description
We get to start preparing the goods when we receive payment from you. (The goods will be sent between 48 hours to 72 hours if we have in stock. The goods will be sent before the delivery time and the sample will send to you for checking.)