Hongkong Hongda International Group Limited is a modern enterprise specialized in developing, manufacturing and marketing ventilation equipment and high-grade window hardware. With Hongda Ventilating Equipmemt Co and Hongda Window Hinge Co, as its subsidiaries, the company possesses a strong technical force and its business is developing rapidly.Hongda Ventilating Equipmemt Co is a professional ventilator manufacturer with a combination of development, production and marketing of its products. Since its establishment, the company has been following closely the latest trends for ventilators in the world and adopting the advanced technology and unique production process. By adhering to the environment friendly principle of returning to the nature and energy-saving and low noise, the company has conducted an overall stringent quality control from its production department to the quality inspection department through scientific management. Our products have been widely accepted at home and abroad and are designated as supplies for many big projects.Hongda Window Hinge Co. are a factory specializing in the manufacture of friction stays & hinges for more than 10 years and its products have been exported through out the world, including the UK, the USA, Middle East, Korea, etc. Hongda manufacture a vast range of sizes and styles of friction stays & hinges. It provides distributors, architects and window makers with multi-functional versatility and adaptability.The traditional business idea of Quality First and Reputation First has been a guideline in our business operations. We will provide better products and service to our customers. Through relentless efforts we will, as always, sincerely cooperate with people of the same trade and friends from all walks of life to create a prosperous future. 2TZR双级高压离心风机2TZR double classhigh-pressure centrifugal fanModelPowerkwVoltagevFrequencyHzSpeedr/minAir Volumem3/hPressurepa2TZR-4A0.9380502800200-3005100-46502TZR-4.5A2.2380502800400-6706420-53002TZR-5A4.0380502800400-13008100-25502TZR-5.6A5.5380502800700-11009700-80807.53805028001150-16007650-34307.53805028007009-130010119-9160113805028001350-23148950-22472TZR-6.3A113805028001030-170011920-9520153805028001720-25199440-9492TZR-6.8A15380502800980-200014570-1095018.53805028002070-292010400-3500