Venturi trap principle, venturi valve, what is the principle?

Venturi. A steam trap is a type of steam trap that appears to be a new type of steam trap. It seems to be new to say that the basic principle is still thermodynamic orifice plate type (which has long been obsolete) hydrophobic.

The principle is: due to the change of the phase state of the medium with a fixed aperture, the flow velocity changes, and the change of flow velocity brings about the change of resistance, which plays a certain role in regulation. Obviously, this adjustment effect is very limited, and the pressure and flow rate of the steam system and equipment in practical application change greatly, and the venturi method is difficult to adapt to this change and cause steam leakage; The steam leakage generated by this hydrophobic method also has a great impact on the pressure change of the downstream hydrophobic system, which promotes the change of the system pressure difference, which reacts to the hydrophobic link and causes the overall system pressure disorder.

Therefore, this hydrophobic method is difficult to meet the needs of system operation and energy saving in most occasions.

Venturi steam traps, venturi traps have no moving parts or on/off cycles that do not exhibit the wear and failure inherent in mechanical traps. Venturi traps take advantage of the physical law of two-phase flow – the difference in density between steam and condensate – to discharge condensate continuously. As a result, venturi traps are used in most steam equipment and are not only extremely long-lasting, but also more energy-efficient than mechanical traps.

The Venturi trap is definitely not a new type of trap, but rather an improved version of an old trap, that is, an improved version of the orifice trap. In fact, the products of some foreign companies are not venturi curves according to their internal structure, and should belong to the orifice plate type. Don't be fooled by the idea of playing with something old and new.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Taking advantage of the density difference between steam and water, at the orifice of the trap, the high-density condensate squeezes out the low-density steam, preferentially discharges the trap, and generates flash steam at the other end of the valve, forming a reverse pressure, so as to ensure the balance of pressure at both ends of the valve, discharge the condensate and prevent steam loss.

Traps play a role in the steam heating system to block steam drainage, and choosing the right trap can make the steam heating equipment achieve the highest working efficiency. In order to achieve the best results, it is necessary to have a comprehensive understanding of the working performance and characteristics of various types of traps.

There are many types of traps, each with different properties. When choosing a trap, you should first choose its characteristics to meet the optimal operation of the steam heating equipment, and then consider other objective conditions, so that the choice of the trap you need is correct and effective.

Traps need to be able to "identify" steam and condensate in order to act as a steam barrier drain. The "identification" of steam and condensate is based on three principles: density difference, temperature difference, and phase transition.

Therefore, three types of traps are manufactured according to three principles: mechanical, thermostatic, and thermodynamic.

Venturi works with animation, you don't know the knowledge, come and take a look!

The mode of air volume control makes the air volume control more stable and accurate, and the landlord can learn about the venturi valve of Desay Zhiyan, which is very easy to use.

The venturi valve air volume control valve has changed the mode of air volume control, making the air volume control more stable and accurate.

The venturi damper is a damper made based on the principle of the venturi effect. When the pressure of the pipe increases, the air flow enters through the inlet, and the air flow rate increases through the inner tank, and produces a lower air pressure at the rear of the inner tank, which has a backward suction force on the inner tank. The liner moves towards the throat of the damper until the suction balances with the elastic force of the support spring of the inner tank.

As the inner diameter of the venturi damper from the inlet of the air flow to the throat gradually decreases, the effective cross-sectional area of the airflow through the damper is reduced, which ultimately leads to the increase of the airflow velocity through the damper, but the effective cross-sectional area of the airflow is reduced, so as to ensure that the flow rate of the airflow remains unchanged.

Venturi works with animation, you don't know the knowledge, come and take a look!

Fixed feed and changeback, spring constant air volume.

The venturi air volume control valve changes the mode of air volume control, making the air volume control more stable and accurate, and the pressure independence of the valve can make a very fast response to the pressure fluctuation in the air duct to ensure the stability of the air volume control, and is widely used in places where the air volume needs to be accurately controlled.

The Venturi air volume control valve is a high-precision, fast-responding, independent of pressure change, and an air volume control device driven by a fast linear stroke electric actuator; It has a unique spool assembly that is not affected by the change of static pressure in the air duct, and has a built-in precision stainless steel spring, which maintains a constant air volume by changing the position of the valve core when the pressure in the air duct changes. Its numerous features give the laboratory control system good performance in terms of fume hoods and laboratory controls.

In the variable air volume system, the Venturi valve is not affected by the change of static pressure in the air duct, and when the pressure in the air duct changes, it maintains a constant air volume by changing the position of the valve spool. After receiving a control command signal from the group signal controller, it is quickly adjusted to the corresponding air volume. As long as the pressure of the air duct is within the working range of the variable air volume venturi valve, the venturi valve will accurately control the air volume.

With the Venturi valve solution, the designer can hardly consider the difference between the nearest and most unfavorable circuits of the duct system, and the venturi valve can easily eliminate such unfavorable factors, and there is no duct pressure balancing during system commissioning. After installation, as long as the corresponding input and output monitoring points are connected according to the wiring diagram, they can be put into use immediately, saving a lot of time for on-site commissioning.

The fume hood control system of the venturi air volume control valve can solve the problem of pressure changes in the system network network, and the venturi valve can automatically adjust according to the pressure change of the pipe network. This process occurs at the same time as the pressure or force change of the pipe network, so as to avoid the adjustment process by the wind speed control system, and achieve fast and stable air volume control.

Variable air volume fume hood exhaust air control is a typical application of venturi valves, fast and accurate exhaust air volume control, can always keep the fume hood exhaust surface air speed stable within the set range. Through the fume hood door position sensor, the venturi valve quickly determines the required exhaust air volume and maintains the face air velocity while the fume hood is operating. It can also be connected to the area occupancy detector and automatically switch the working standby mode to reduce the energy consumption of the fume hood operation.

The focus of the laboratory construction is on the ventilation system, and the core of the ventilation system is the airflow control, and the precision and responsive air volume control valve has become the top priority. Budget, safety, reliability, operating costs, after four exclusion screenings, venturi valve airflow control has become one of the few retention.

<> Venturi valve can be used with liquids, the venturi valve is based on the venturi effect, when a gas or liquid flows in a venturi tube, at the narrowest point of the pipe, the dynamic pressure (velocity head) will reach a maximum, the static pressure (resting pressure) will reach a minimum, and the velocity of the gas (liquid potato) will increase due to the decrease in the cross-sectional area of the flow. Venturi valves are equipment used to extend airflow control to the highest level, and are manufactured based on the Venturi effect, such as Venturi water film dust collectors, venturi diffusion tubes, venturi shrink tubes, venturi jet pumps, venturi flow meters, venturi airflow control valves, etc.