EDRV dynamic equilibrium electric control valve Shanghai, Tianjin Shield

1. General Electric dynamic balancing of professional producers, the Shanghai Valve Co., Ltd. Tianjin Shield developed the production of balancing / building control valves reliable quality, reasonable prices, improve service. Electric dynamic balancing valve for a variety of light and heavy industrial and building pipelines. Valves / central air-control valve pan used: chemical, petrochemical, oil, paper, mining, electricity, gas, food, pharmaceutical, water supply and drainage, municipal, mechanical equipment, electronics industry, urban construction and other fields. Principle 2. Features [balancing / control valve is a valve body] anti-regulation, when the entrance to the increased pressure is automatically reduced diameter, reducing traffic changes, and vice versa. If the reverse, this regulation system would be ineffective. And the regulating valve, is directional, reverse pressure flow can even be reduced or even closed. Since the installation of balancing valves in order to better heating, there is no anti-loaded questions. If it is reversed, that is, human error, of course, will be corrected. Valves belong to the scope of the control valve, it works by changing the valve and valve seat gap (ie opening), changing the flow resistance of the fluid flow through the valve, to regulate the flow of purpose. 3. The working principle of dynamic electric balance Valve Co., Ltd. Shanghai, Tianjin Shield is different from the traditional electric control valve of the new generation of products, is the integration of dynamic equilibrium with the electric control valve products. It works as shown below, the system load fluctuations of variable flow systems, when the system pressure changes, the dynamic balance of electric control valve second end of the pressure difference (P1-P3) also change. 4. Description: ⑴, when the inlet pressure P1 increase, (P1-P2) increases, then the electric valve spool movement upward, so that P1, P2 between reducing the opening of the spool pressure P2 lower; when the inlet pressure P1 When lowered, (P1-P2) decreases, then the electric valve spool moves downward, so that P1, P2 between the opening increases, the spool pressure P2 increases. Therefore, the pressure no matter how the system changes, through regulation of the electric valve spool, P2, and P3 pressure is always maintained. Therefore, this valve anti-jamming capability is strong, with a dynamic equilibrium function; ⑵, when the straight travel electric actuator receives a control signal to the valve shaft extension of A-B to move up and down (or rotary electric actuator receives a control signal to the valve shaft Yan R rotation), the opening of the P2, P3 also changes between. Because regardless of system pressure (P1-P3) what changes, P2, P3 pressure difference between (P2-P3) is always the same, and therefore correspond to any open position, the water flow is certain of its transportation and electric The actual valve flow characteristic curve from its ideal flow characteristic curve is the same, there is no deviation. Therefore, this more traditional electric control valve electric control valve has a better regulation characteristics. 5.EDRV series electric control valve Material of main parts: Body Ductile iron electric actuator housing aluminum sleeve stainless steel spool brass 6.EDRV series electric control valve technical parameters: Model specifications of the pressure valve in the form of range (KPa ) flow range (m0 / h) working pressure and flow errors fluid temperature A / D-EDRV1 two-DN25 30-300 0.2-2.9 PN16 5% 0-100 ℃ A / D-EDRV2 DN32 30-300 0.5-4-7 A / D-EDRV3 DN40 30-300 1-7-7 A / D-EDRV4 DN50 30-300 2-12.1 A / D-EDRV8 DN65 30-300 3-20.4 A / D-EDRV9 DN80 30-300 5-30.8 A / D-EDRV10 DN1OO 30-300 10-45.3 A / D-EDRV11 DN125 30-300 15-70-7 A / D-EDRV12 DN150 30-300 20-101.8 A / D-EDRV13 DN200 33-300 5.0-360 A / D-EDRV14 DN250 22-210 4.O-460 7. effect: balancing role is to regulate the system, a predetermined flow rate of each distribution point (as per a balcony) is. Each floor of the entrance of a balancing valve is installed, it can make the total flow heating system has been distributed fairly. In the pipeline system during normal operation and should not arbitrarily change the opening balance valve, in particular the opening of the locking device should not change. Shanghai Valve Co., Ltd. Tianjin Shield welcome your inquiry to discuss! 8.EDRV series of electric valve Installation Notes: (1) adjusting the valves are field instruments, requiring ambient temperature should be in the range of -25 ~ 60 ℃, relative humidity ≤95%. If you are installing in the open air or high temperature applications, should take water, cooling measures. There are places in the source away from the vibration source or increase anti-vibration measures. (2) The valve should normally be mounted vertically, can be tilted under special circumstances, should increase support for valve protection, such as the tilt angle is large or the valve itself too much weight. (3) Install the valve of the pipe is generally not too high off the ground or floor, try to set up the platform when the tube height greater than 2m, in order to facilitate the handwheel and ease of maintenance. (4) The control valve installation response pipeline cleaning, to exclude dirt and weld slag. After installation, to ensure that no impurities remain in the valve body, the valve should be cleaned again, that should be introduced into the medium so that all valves open, to avoid impurities stuck. After using the hand wheel, it should be restored to its original neutral position. (5) In order to make the valve in the event of failure or maintenance make the production process can be continued, the control valve bypass pipe should be added. Special attention should also adjust the installation position of the valve meets the requirements of the process. (6) of the electrical part of the electric control valve should be installed in accordance with the construction requirements for electrical equipment. If so flameproof products should be "explosion hazard electrical equipment installation specification" requirements for installation. Such as live wires using SBH type or six other core or eight-core, an outer diameter of about Φ11.3mm rubber cable installation. In the use and maintenance in explosive spaces non-energized maintenance openings and pry surface explosion hit. While dismantling the explosion not to be injured face, we want to restore to its original state after maintenance explosion-proof requirements. 9.EDRV series electric control valve scope of products: construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, and environmental protection. 10.EDRV series electric control valve product performance characteristics: (1) electric control function means the valve can be automatically adjusted according to changes in the valve opening target zone temperature control signal, thereby changing the water flow, and finally to the actual temperature of the target area and set temperature. (2) Evaluation of the quality of electric adjustment of electric control valve flow characteristic curve. In the air conditioning system, electrically adjustable common ideal flow curve of the valve is a linear or equal percentage. But for the general electric control valve, the actual use of the process due to the small valve authority, so that the actual flow curve deviates from the ideal flow curve. Electric control valve flow characteristics desired curve is linear but the installation to the actual flow characteristic curve after the pipeline system approaching fast opening regulator characteristic deteriorates. (3) dynamic equilibrium electric control valve due to the unique body structure, in actual use basic project valve authority is 1, so the actual flow curve is consistent with the ideal flow characteristic curve, there is no deviation, so it has excellent electrically adjustable. 2 has a dynamic equilibrium functions: (1) dynamic equilibrium function means the end of the equipment load changes require electric control valve guts adjusted to a degree of opening, no matter how changes in system pressure, the valve is able to dynamically balance the system's resistance to Traffic is not affected by system pressure fluctuations and remain constant. (2) assuming in summer conditions, the region has been adjusted to a state of equilibrium, i.e., the temperature T1 of the target area has stabilized at 25 ℃, then the opening degree of the electric valve to maintain the dynamic equilibrium in a position to output a constant unchanged traffic. (3) The two still in an unstable state, measured return air temperature T2 is 24 ℃, lower than the set temperature of 27 ℃, then measuring the temperature and the set temperature in the temperature controller compares the output signal of the dynamic balance of power reducing valve off a small amount of cold water flowing through the air handler II, then cooling capacity will be reduced, so that the measured temperature T2 rises close to the set temperature; thus, the system riser C, D two-point difference would increased dynamic equilibrium electric air handlers Yihuan valve DV1 two-terminal C, B1 two points of pressure will also increase accordingly. However, due to the dynamic equilibrium dynamic equilibrium electric valve function (the dynamic balance of a given pressure differential spool PV1), the electric control valve spool second end A1, B1 point of pressure is not changed, so that the air handler Yihuan The flow rate remain unchanged, the same cooling capacity, the corresponding region is still in a state of equilibrium. 11.EDRV series electric hydraulic control valve functions: regulation of the air handler ring road did not have a balance of air handlers a loop interference, so there is no dynamic hydraulic imbalance between these two loops. For multi-loop system, any one loop regulation will not interfere with other loops, while no one loop will not be affected by other loop adjustable larger the system, the characteristics of such a dynamic equilibrium more obviously, it affects every area of ??the loop only affected by their own load changes, regardless of system pressure fluctuations, so it is easy to achieve and maintain balance. Shanghai Valve Co., Ltd. Tianjin Shield Welcome to consult the discussion!