venturi valve

The Venturi valve is designed and manufactured based on the Venturi effect. The Venturi effect, also known as the Venturi effect. This phenomenon is named after its discoverer, Italian physicist Giovanni Battista Venturi. The effect is that when the restricted flow passes through the narrowed flow section, the flow velocity of the fluid increases, and the flow velocity is inversely proportional to the flow section. Linear motion is performed by a pressure independent controller. Therefore, the calibration of N air volume points can be intercepted to achieve the precise determination of the required air volume.

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The rapid positioning of servo drive and the rapid change of pressure in the pipeline ensure the stability of the overall system
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reduce the noise

Ultra quiet operation of the driver and valve body
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aerodynamics

Perfect combination of CFD simulation and structural mechanics
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The Venturi valve combines a mechanical pressure independent regulator with a high speed air flow controller,Extending airflow control to the highest level,through aerodynamic design, the valve has Quiet working performance, quick-response automatic pressure balancing device, providing reliable Fume hood exhaust and indoor pressure control. Venturi valve is not immune to duct pressure The influence of changes, the air volume control range is 64m3/h to 27600m3/h, and the reverse It should be fast (≤1 second), and the adjustment should be accurate (±5%).

◆ Continuous welding of magnesium-aluminum alloy or stainless steel the surface of the valve body is not less than WF2 anti-corrosion treatment or brushed polishing.
◆ A CNC-shaped streamlined hyperbolic valve body, without ring seam welding.
◆ The main shaft and bracket are 304SS or 316L stainless steel, (TPFE anti-corrosion)
◆ The valve core is made of magnesium alloy or stainless steel at one time. The valve cores of the same model are all light in weight and the same weight
◆ CAV fixed air valve with wind calibration device can be adjusted on site according to actual requirements.(Patented product)
◆ Venturi valve VAV corresponding switching time ≤ 1s.(Patented product)
◆ The air supply valve adopts 9mm flexible closed-cell polyethylene insulation layer, and the oxygen index is more than 35.
◆ Operating environment: 0-50 ° C 　Noise: better than national standards　Relative humidity: 10-90% without condensation

◆ Pressure independent of valve pressure drop before and after 150~750Pa.
◆ The air volume control accuracy is ±5%.
◆ No additional straight piping is required before or after the valve.
◆ High turndown ratio 20:1/16:1.
◆ There are no less than 50 calibration air volume points in the factory.
◆ The required N air volume points can be calibrated according to the demand.
◆ The required N air volume points can be calibrated according to the demand.

◆ Intelligent control integrated servo drive motor
◆ Double loop
◆ The response time of static pressure change of air duct is less than or equal to 1s.
◆ Ultra-quiet operation of the driver <50dB
◆ System operating pressure is too high, power off protection (can be set).
◆ The VAV variable air volume valve adopts a high-precision servo drive device, and the repeatability is set to an accuracy of ＜ 0.05mm

venturi valve application

Variable air volume venturi valve

VAV series variable air volume venturi valve can be used as an independent room control unit. It is used in clean laboratories and other places where the airflow direction needs to be accurately controlled and the room pressure difference needs to be constant. Pressure independent air volume valve is suitable for exhaust control in air conditioning system or ventilation system.

The automatic control integrated servo drive regulates the positioning, and the air volume has nothing to do with the pressure change in the pipe
Working pressure range: 150pa ~ 750pa
High control accuracy: air volume control accuracy ≤± 5% (within the range)
The factory calibrates the air volume at 50 points to save on-site commissioning time
Calculate and adjust the differential pressure of the room and the air volume of the air valve through the residual air volume
The front and rear air ducts of the valve do not need straight pipe sections
There are requirements for horizontal or vertical installation
Special coating with acid corrosion resistance can be selected

Constant air volume venturi valve

CAV series constant air volume venturi valve can accurately control the air volume, and directly control the air volume of the air valve through calibration. Pressure independent air volume valve is suitable for fresh air, return air or exhaust air in air conditioning system or ventilation system.

For self-adjusting mechanical components, the air volume is independent of the pressure change in the pipe
Working pressure range: 150pa ~ 750pa
High control accuracy: air volume control accuracy ≤± 5% (within the range)
Factory calibrated air volume, saving on-site commissioning time
The air volume is limited by mechanical limit without power supply
The front and rear air ducts of the valve do not need straight pipe sections
There are requirements for horizontal or vertical installation
Special coating with acid corrosion resistance can be selected
The air volume can be adjusted according to the actual requirements on site

Tips

1.CAV series valves have no valve actuator and valve controller, and do not need power supply.
2.VAV is an electric control valve and requires power supply.In order to increase the flow control capacity, multiple valve bodies can be combined as a device.

Specifi cation Valve body size（mm） Model	Single valve round flange		Single valve rectangular flange				Double valve rectangular flange				Three-valve rectangular flange				Four-valve rectangular flange
Specifi cation Valve body size（mm） Model	D	L	L	W	H	H1	L	W	H	H1	L	W	H	H1	L	W	H	H1
200-8〞	∅200	600	660	230	230	375	660	460	230	375	660	690	230	375	660	460	460	750
250-10〞	∅250	550	610	280	280	425	610	560	280	425	610	840	280	425	610	560	560	850
300-12〞	∅300	690	750	330	330	475	750	660	330	475	750	990	330	475	750	660	660	950
350-14〞	∅364	760	820	400	400	545	820	800	400	545	820	1200	400	545	820	800	800	1090
Note: All dimensions have a tolerance of ±3mm. If the valve body is larger than the double valve body, it needs to be assembled and assembled on site, and the butt flange is provided.

Function /option	Constant air volume(CAV)	Electric variable air volume(VAV)
Control type	Mechanical	Servo motor
Flow feedback signal	——	√
Power loss protection (normally closed or normally open)	Fixed position	Normally open/ normally closed
Continuous operation with power outage	——	Standard
Valve body factory insulation	Option	√
On-site flow adjustment	Option	√
Flow alarm via sensor	——	Option
Flow alarm through pressure switch	Option	Option
All valves include pressure independent devices, factory calibrated adjustable positioning devices, providing flow ranges from 64-27600m³/h.

Note the label description of the valve body: the vertical valve can only be installed vertically, and the horizontal valve can only be installed horizontally, and cannot be mixed; Pay attention to the direction of air flow, and install according to the direction indicated by the arrow. The direction of the arrow is consistent with the direction of air flow.When installing the air valve, pay attention to the position of the control box and reserve the maintenance channel.

Single valve plug or flange connection
Multi valve integral flange connection

* All products are guaranteed for 24 months.

have a swift response

reduce the noise

aerodynamics

venturi valve application