国四排气管与隔热棉

1.消声器及排气管，良好的外观及抗疲劳设计，表面涂装耐650℃高温漆，优良的抗老化性。
Muffler and exhaust pipe, unique appearance and anti fatigue design surface coating resistant to high temperature of 650 ℃ Paint, excellent aging resistance.
2.多种消声方式的组合保证了低的功率损失、高的降噪效果。
Kinds of ways to reduce noise ensure the low power loss and good result of noise reduction.
3.消音器表面温度要求苛刻条件下，可选装外置（可内置）隔热棉，采用厚度15mm，密度135kg/m³，隔热棉时，平均温度低于70℃（消音器表面温度过高可造成液压系统油温高及橡胶管路老化），也可采用防烫伤隔热板网。
Heat insulation cotton ,15 mm thick,135kg/m³ Density,internally installed(or external) can maked the temperature lower than 70℃.(High mufflel surface temperatures may lead to hydraulic system high oil temperature and oxidation of the rubber).

主要技术指标
The main technical indexes
1、消音器内部结构属阻抗复合式，功率可配套20kw-90kw。以发动机功率不同外形直径可选Φ90-Φ650mm。
2、消音器表面可选静电喷涂有机硅高温黑漆，在小于600度条件下不起泡、不脱落、不变白粉化（也可选耐高温、耐盐雾的热镀铝合金涂层)。
3、消音器插入损失>15dB、功率损失<2。
4、消音器背压不超过10Kpa。
5、为减少功率损失、增强降噪效果，可选装降噪系数(NRC）0.65消音棉。
1.The internal structure of impedance muffler are impedance complex, powercan differ from 20kw-90kw。So the outsid diameter can range from 90mm-650mm.
2.The coating of the muffler can choose hot plating aluminum alloy,It wouldn't bubble up,fall off or powder in less than 600℃ environment.(Or choose the hot plating aluminum alloy.)
3.Muffler insertion loss is less than 15dB,the loss of power is less than 2%.
4.Censored QiBei pressure is no more than 10Kpa.
5.The (NRC)0.65 censored cotton can be choosen to lower the power loss and strengthen the noise reduction effects.