Basic Info.
Valve Body Material
Ductile Iron
Specification
DN50-DN300(AC24V/AC220V)
Product Description
The dynamic balance electric regulating valve is mainly suitable for the temperature control of air-conditioning equipment (such as air-conditioning boxes, fresh air units, and air treatment units) at the end of the HVAC system. It has more obvious advantages in variable flow systems with large system load fluctuations. Product Parameters
Working principle
Dynamic balance electric control valve is a product that integrates dynamic balance with electric and manual adjustment.It adopts a brand new design concept, so that the control valve can dynamically balance the pressure changes of the system when the pressure fluctuates during the actual operation of the system.Therefore, the flow characteristic curve of this dynamic balance electric regulating valve is consistent with the ideal flow characteristic curve when it is working, and there is no deviation.The special design ensures that the adjustment of the electric valve is only affected by the standard control signal, not by the system pressure fluctuations. Moreover, the flow rate corresponding to any opening position of the electric valve is unique and constant. For HVAC systems, this means that the amount of heat (cold) delivered by the electric valve in any adjustment position is stable.Therefore, this kind of electric valve is particularly suitable for variable flow systems with large system load changes. It has the characteristics of strong anti-interference ability, stable working state and high adjustment accuracy.It avoids the disadvantage that the flow rate of the traditional electric regulating valve varies with the fluctuation of the system pressure even if it is in the same opening position.The dynamic balance electric regulating valve keeps this flow rate unchanged. When the command changes, the opening of the electric valve changes, a new flow value is set, and the balancing valve keeps the new flow rate unchanged, so that it is not affected by the outside world, and the flow rate of the unit is kept unchanged, so that the system adjustment is relatively stable.
As shown in the figure below, in a variable flow system with large fluctuations in system load, when the system pressure changes, the pressure difference (P1-P3) at the two ends of the dynamic balance electric regulating valve also changes:
(1) When the inlet pressure P1 rises, (P1-P2) increases, then the electric valve spool moves upward, so that the opening between P1 and P2 decreases, and the spool pressure P2 decreases. When the inlet pressure P1 decreases, (P1-P2) decreases, then the electric valve spool moves downward, so that the opening between P1 and P2 increases, and the spool pressure P2 increases.Therefore, no matter how the pressure of the system changes, the pressure difference between P2 and P3 remains unchanged through the adjustment of the electric valve spool.Therefore, this kind of electric valve has strong anti-interference ability and has the function of dynamic balance.;
(2) When the electric actuator accepts the control signal to cause the valve shaft extension A to B to move up and down, the opening between P2 and P3 also changes.Since no matter how the system pressure difference (P1-P3) changes, the pressure difference (P2-P3) between P2 and P3 remains the same, the water flow rate corresponding to any opening position is certain, and the actual flow characteristic curve of the electric regulating valve is consistent with its ideal flow characteristic curve, and there is no deviation.Therefore, this kind of electric regulating valve has better regulating characteristics than traditional electric regulating valves.The valve opening can be adjusted manually during power failure.
Material | Valve body | Ductile iron | Electric actuator housing | ABB flame retardant |
| Valve sleeve | Stainless steel | Valve core | Stainless steel |
2. No noise and large output torque.
3. Valve movement position indicator.
4. Flame-retardant ABS engineering plastic cover.
5. The valve position control accuracy is high and the response speed is fast.
6. Easy on-site installation.Technical parameters: | Model number | VA3000-B |
| Rated voltage | AC24V±10% 50/60Hz |
| Power consumption | 10VA |
| Control signal | AC24V DC0-10V or 4-20mA |
| Feedback signal | DC0-10V or 4-20mA |
| Drive output force | 1500N |
| Full time | 120S |
| Weight | 1.2KG |
| Operating environment | Bracket: die-cast aluminum alloy
Shell: flame-retardant ABS engineering plastic |
| Material | Operation: -5~+55ºC
Storage: -20~+65ºC
Relative humidity: <90% non-condensing |
1. Before installation, please check whether there is enough space left in the upper part of the actuator, which should be not less than 120mm for easy installation and disassembly.
2. Put the drive bracket on the valve connector.(See Figure 1)
1) when you hold the drive in your hand, the fixing screws are facing out
2) when the concave-convex structure of the connection is consistent
3) Install the drive in the direction of the arrow
3. Screw the lock nut into the valve stem, put on the scale indicator, and tighten the fixing screws.(See Figure 2)
4. Lift the valve stem upward and insert it into the connecting rod, turn the connecting rod to screw the valve stem into it. After adjusting the position, the effective stroke of the drive coincides with the stroke of the valve position, and use a wrench to lock the lock nut tightly.(See Figure 2)
5. Open the driver housing and connect the power cord and signal line (see the wiring diagram). Please introduce the connection cable from the inlet hole.
6. After the wiring is completed, energize the valve to close, align the closing line of the scale ruler with the scale indicator, and reliably attach the scale ruler to the drive bracket.
7. Install the shell, fix the drive, and the installation is complete.Precautions:1. The drive must be protected to prevent water leakage and damage to internal parts and motors.
2. The drive should not be covered by insulation materials.Do not put it in a place with direct sunlight.
3. When repairing the drive, the power supply must be turned off to prevent damage to the parts or leakage and casualties.
4. When the power supply is connected, do not try to connect or disassemble the wires. Our Advantages
Detailed Photos
Company Profile
FAQ
Frequently asked questions
1.Where is the main market for your products?
Answer: Our company has about ten years of experience in selling valves in China, but it is still just starting out in terms of exports. We hope to conduct business with companies from all over the world in the future.
2.Can samples be provided?
Answer: We can provide samples, but the freight needs to be paid by the customer.
3.How long is the delivery time?
Answer: It currently takes about 15 days, but it does not rule out that there may be special circumstances in the middle to extend the delivery time, we will communicate with you in time; if you need special customization, the delivery time will be extended, you can consult customer service for details.
4.What are the payment methods?
Answer: We currently support two payment methods, L/C and T/T.
5.How do you guarantee the quality of your products?
Answer: Our products are strictly tested before leaving the factory. Unqualified products will not be sold. Please rest assured.
6.How long is the warranty period?
Answer: Our warranty period is one year. If it is not man-made damage during the period, we will provide free maintenance; if it is product damage caused by improper customer operation and installation, we only provide paid warranty service.
7.Where is the shipping port usually?
Answer: Our shipping port is generally in the port of Shanghai, and we may also ship from the port of Ningbo.
Address:
Room 304, 3/F, Building 3, No. 202, Caijiabang Road, Dongjing Town, Shanghai, China
Business Type:
Manufacturer/Factory
Business Range:
Arts & Crafts, Construction & Decoration, Electrical & Electronics, Industrial Equipment & Components, Instruments & Meters, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy, Tools & Hardware
Company Introduction:
Shanghai Haoshui Automatic Control Valve Co., Ltd. Was established on May 18, 2015. The legal representative is Liu Bin, the registered capital is RMB 5 million Yuan, and the unified social credit code is 91310117342443418U. The enterprise address is located in Room 304, 3/F, Building 3, No. 202, Caijiabang Road, Dongjing Town, Songjiang District, Shanghai City. The industry belongs to the wholesale industry. The business scope includes: General items: Sales of automatic control valves, electronic control equipment, instruments and meters, filtering equipment, water purifiers, water treatment equipment, pipes and accessories, HVAC equipment, electromechanical equipment, pumps, hardware and electromechanical equipment, mechanical equipment, rubber and plastic products, e-commerce (not allowed to engage in value-added telecommunications and financial business), technology development, technology transfer, technical consultation and technical service in the field of intelligent science and technology. (In addition to the projects subject to approval according to law, the company shall independently carry out business activities according to law with its business license). Shanghai Haoshui Automatic Control Valve Co., Ltd. is currently operating in the state of existence (in business, business, registered).
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