The series control valves of NFHV is designed for use in ventilation systems where radioactive substances are present.

The series of NFHV air valve is a pressure independent type air valve which is specially used in the exhaust hood. Equipped with exhaust air and temperature measuring star device, Equipped with exhaust air volume and temperature measuring device, controller and fast actuator. The utility model is suitable for the variable air and the fixed air and the chemical exhaust fume hood. Air valve housing are cylindrical, both ends with Farlane, power supply. The controller is installed in the control box outside the valve body.The air valve actuator is mounted outside the valve body.

The series NFHV air volume control valve recommended air volume and working pressure difference meter

High strength material

304(316L) Stainless steel or carbon steel. The surface can also be coated with anti-corrosion materials. Fire resistance, high and low temperature resistance, corrosion resistance.

Save installation space

Small body structure and the length of the valves  total length not exceeding 270mm, Can be directly installed in the exhaust outlet or elbow downstream, no straight pipe section requirement..

Stress is irrelevant

In properly designed and installed systems，air Volume Control Deviation is ≤5%.

High tightness

In accordance with the EJ/T 1096-1999 《Sealed chamber sealing classification and inspection methods》, the relevant provisions，Under the pressure of 3000 pa, the air mixing capacity of the valve body meets the allowable value of the standard of the 2-stage valve body. In accordance with the NBT 20039.2《relevant provisions of the code for Nuclear Air and gas treatment》，the valve sheet meets the leakage requirements of Class Ⅲ.

Quick adjustment

Pre-installed controller learning algorithm, can be familiar with personnel moving the door Operation Habits, the adjustment speed is ≤ 3 s.

be anti-interference

The orifice plate inside the air valve can greatly reduce the interference of the exhaust air volume control when the adjacent exhaust fume hood is adjusted.