RTC series low-noise centrifugal roof exhaust fan (aluminum)

本公司凭借多年来专业研发离心通风机的成功经验，吸取了国际同类产品的优点，以欧美技术为基础，人性化的设计，并经过大量的精确计算以及模型风机和实物产品的反复试验，以先进的技术装备制造开发和完善了RTC系列低噪声离心式屋顶排风机。该产品具有新颖、美观、高效节能等优点。

Depend on the past successful experience on low-noise roof centrifugal fans, and assimilated the advantage of the congeneric products, our company has developed and consummated the RTC series low-noise centrifugal roof exhaust fan by taking the new industry design idea, accurate calculating and the repeating   experimentation. This product is new, beautiful, high efficient and energy saving.

   本系列风机机号按叶轮直径分有300、425、500、575、675、750、900、1000，共8种规格，风量自329m3/h至57200m3/h，最高静压达650Pa。

RVF series fan has 8 models according the difference of the impeller diameter: 300、425、500、575、675、750、900、1000, the airflow is from 329m3/H to 57200m3/h. The highest static pressure reaches 650Pa.

    本公司还可以按不同参数和特定要求，设计开发特种规格的风机，实现与工程所要求参数的最佳匹配，以满足特定工况的要求。

We also can develop the special fan according to customer’s parameters, to meet the special project situation and realize the best match.

 

Products Characteristics

1.风机叶轮：采用CFD流场模拟技术优化设计的“欧达系列”高、低压铝合金叶轮，该叶轮的前盘、后盘、叶片经冲压、成型等多道工序加工，结构紧凑且具有风量大、噪声低、高效率等特点。

Fan impeller：Use the “Ordro series” impeller which is optimized by the CFD technology and made up of high quality aluminum alloy, the impeller is processed by pressing and moulding, it is in compact structure, big airflow, low noise and high efficient.

2.风机配套电机 ：用防护等级IP54、绝缘等级F，温升等级B级电机，如配绝缘等级为H级，产品可在280℃/45min高温环境下连续运行；另也可配防爆电机、双速电机和变频电机。

Matched motor：Use the B-class motor with IP54, and isolation class F, when the isolation class is H, the products can be contantly operated under 280℃/45min, also can use the blast proof motor, two-speed motor and frequency conversion motor.

3.机 壳：本风机整体结构强度按50m/s极端室外风速的条件进行设计。风机采用铝合金材质，经拉伸、圈边等加工，在保障风机足够强度的前提下，提高了风机外形的美观，减轻了风机的自重，降低了对屋顶基础的强度要求，且抗风能力较好。

Fan crust：It is made up of aluminum alloy, the whole fan structure intensity is designed according to the extreme outside wind speed under 50m/s, it has a quite good wind resistance ability.

4.风 帽：采用铝合金制造，整体拉伸成型，并经圈边处理。专利技术，重量轻，强度高，风阻小。

Funnel cap：It is made up of aluminum alloy, flat ,streamline, modularized, with patent technology, in low weight, high intensity, small wind resistance, suitable for ventilation.

5.集流器：采用精密的文丘里管设计，一次成形工艺，使叶轮导流口与进风口充分吻合，有效控制气流组织，符合流体力学的双曲线型文丘里进风口，大幅降低入口噪音，提高风机效率。

Current collector：Use the special design to make the impeller leading flow opening match with the air inlet, to effectively control the airflow, reduce the noise and improve the fan efficiency.

6.固定支架t：数控下料、成型，多工位数控冲床加工固定孔，安装方便。

 Fixing bracket：Numerical control preparing material, moulding, punch machining of the fixing hole, it is easy for installation.

7.传动装置 gearing：本系列风机采用皮带传动，这种传动形式可以根据不同的带轮配置来达到一定的风机转速，能更好地匹配实际工况要求。风机轴经过调质处理和平衡测试，其第一临界转速大于风机最大运行速度的1.3倍，皮带轮选用欧式带轮。

Gearing：This series fan uses the strap gearing, this driving method can reach the stated air rotate speed, perfectly match with the project situation. The fan bearing has been treated and tested, and its critical rotate speed is 1.3 times than the fan’s highest operation speed, the strap is European type.

8.风 阀：采用重力自动关闭式或电动驱动启闭式。重力自动关闭式风阀框架材质为热镀锌板，百叶材质为铝合金；电动驱动启闭式风阀叶片采用铝合金保温型百叶制造，防结露，防气流倒灌，尤其适合北方严寒地区使用。排烟通风二用，可选配排烟防火阀，风机、排烟防火阀均已通过国家消防型式试验。

Air valve：Use the gravitational automatic turnoff or electric driving startup and turnoff. The air valve for gravitational automatic turnoff is made up of hot galvanized casing and aluminum alloy leaflet, the air valve for electric driving startup and turnoff is made up of aluminum alloy heat preservation leaflet, dew eliminating, prevent from air flow backword, especially suitable for the freezing area. Both for smoke exhaust and ventilation, can be matched with the smoke exhaust fireproof valve, the fan and the fireproof valve all have been proved by national fireproof standard.

9.安装维护：电机防护罩采用扣襻固定结构，操作方便，省时省力。

Installation and maintenance：The motor shield is in button loop-type, it is easy for operation.

10.运转平稳：本风机的转动惯量小，动平衡精度高，平衡精度达到ISO1940标准的G2.5平衡等级水平，整机经过机械性能试验、振动试验和气动性能试验，以保证达到运行平稳、可靠的要求。有效延长风机的使用寿命，降低噪音，减小振动。

Steady operation：This series fan has the small running inertia, high acting balance precision, the balance precision reaches ISO1940 G2.5 level, the whole machine has passed the mechanism, libration and pneumatic control examination, to ensure the steady and reliable operation. It also can extend the life span of the fan, reduce the noise and minish the libration.

Remark：The fan rotate speed in the parameter sheet is: 460rpm、560rpm、720rpm、960rpm、1450rpm, the driving method can be motors direct connection.