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

本公司凭借多年来专业研发低噪屋顶式离心通风机的成功经验，产品吸取欧美同类产品的优点，并经过精确的计算以及模型风机和实物产品的反复试验，以创新的设计理念，开发和完善了RVF系列低噪声离心式屋顶上排风机。产品不但追求简洁美观的外形，也追求可靠的内在品质，更追求以人为本的人机新境界。

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 RVF series low-noise centrifugal roof exhaust fan by taking the new industry design idea, accurate calculating and the repeating experimentation. Our products not only focus on the beautiful appearance, but also the reliable quality, even more the new compass of people foremost.

RVF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1280m3/h至53900m3/h。 

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 1280m3/h to 53900m3/h.

   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：采用防护等级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 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.

5.安装维护：电机、风帽为扣襻式结构，盖板拆卸方便，整机维修时可拆卸风帽、电机、支撑板。维护较为方便简单。

Installation and maintenance：The motor and funnel cap are in button loop-type, it is easy to take down the cover board, and take off the funnel cap, motor and uphold board during maintenance for the whole machine.

6.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.

7.上排风结构：向上的排风出口风速均在5.0～8.0m/s,可以把排出的污染空气吹向高空(等效于接3～4m长的风管),有利于排出的气体更好扩散,特别在排风机附近有屋顶送风机的情况下,这一特性尤其明显,可以减少排风对送风的干扰。同时该风机特殊的结构，使排放的废气避开了电机，从而延长电机的使用寿命。

Upper ventilation structure：The upper ventilation outlet air speed is between 5.0~8.0m/s, it can send the polluted air to the high altitude, it’s quite good for the air pervasion especially when there is a roof vent fan nearby. This structure can make the motor avoid from the exhaust gas and extend the life span.