Introduction of Zhejiang Baolun central air conditioning two-way and three-way proportional integral electric control valve

Zhejiang Baolun Valve Co
, Ltd
specializes in the production of central air conditioning electric control valve control valve
Key points: 1
It is used for hot water, cold water and low-pressure steam
2
Medium temperature: 1-10 ℃ to 180 ℃
3
0
03 of the leakage Kv value
4
Pressure range: 16bar
5
Diameter: dn15-500
5
The flow coefficient Kv value is 10-360
6
Connection method: screw port and flange
7
Pressure: PN16
8
Valve body material: brass, ductile iron, cast steel

Precautions for installation and use: for the newly designed and installed control system, in order to ensure that the regulating valve can work normally during startup and make the system an fully operate, before the installation of the new valve, the nameplate mark on the valve should be checked to see if it is consistent with the design requirements
The following items shall also be commissioned
Basic error limit; Full stroke deviation; Return difference; Dead zone; Leakage amount (in case of strict requirements)
If the regulating valve in the original system is repaired, in addition to verifying the above items, the sealing of the stuffing box and the connection of the old valve shall also be checked
In field use, many are not caused by the quality of the control valve itself, but by improper installation and use of the control valve, such as improper installation environment, installation position and direction, or unclean pipeline
Therefore, pay attention to the following aspects when installing and using the electric control valve:
(1) the regulating valve is a field instrument
It is required that the ambient temperature should be within - 25 ~ 60 ℃ and the relative humidity ≤ 95%。 If it is installed in the open air or at high temperature, waterproof and cooling measures shall be taken
Keep away from the vibration source or add anti vibration measures where there is a source

(2) generally, the regulating valve shall be installed vertically, and it can be tilted under special circumstances
If the tilt angle is very large or the self weight of the valve is too large, the supporting parts shall be added to protect the valve

(3) generally, the pipeline for installing the regulating valve shall not be too high from the ground or floor
When the pipeline height Da is greater than 2 m, a platform shall be set as far as possible to facilitate the operation of the hand wheel and maintenance

(4) before the installation of regulating valve, the pipeline shall be cleaned Xi to remove dirt and welding slag
After installation, in order to ensure that no impurities remain in the valve body, the valves shall be cleaned again, that is, all valves shall be opened when the medium is introduced to avoid impurities from being stuck
After using the hand wheel mechanism, it shall be restored to the original neutral position

(5) in order to enable the production process to continue in case of failure or maintenance of the regulating valve, the regulating valve shall be equipped with a bypass pipeline
At the same time, special attention shall be paid to whether the installation position of the regulating valve meets the requirements of the process

(6) the electrical part of the electric control valve shall be installed according to the construction requirements of relevant electrical equipment
If it is a Bao type product, it shall be installed according to the requirements of baozha specification for installation of electrical equipment in hazardous locations
If the field conductor adopts SBH type or other six core or eight core, and the outer diameter is? Install cables with rubber of about 11
3 mm
During the use and maintenance, it is strictly forbidden to power on and open the cover for maintenance and pry the Bao partition surface in the places prone to Bao
At the same time, do not knock or scratch the partition Bao surface during disassembly and assembly, and restore to the original partition Bao required state after maintenance

(7) the reducer of the actuator shall be lubricated after disassembly and repair
Generally, the low-speed motor shall not be disassembled, cleaned and lubricated
After assembly, check whether the valve position is consistent with the valve position opening indication

Use and maintenance: with the rapid development of China's industry, the electric control valve is more and more widely used in metallurgy, petrochemical industry and other fields, and its stability and reliability are becoming more and more important
Its working state will directly affect the automatic control process
This paper will elaborate on the use and maintenance of the electric control valve
The electronic electric single seat regulating valve is composed of a straight stroke full electronic electric actuator and a top guide straight through low flow resistance single seat valve
It has compact structure, light weight, sensitive action, s-streamline fluid channel, small pressure drop loss, valve capacity, and accurate flow characteristics
It can directly accept the control signals (4-20mA DC, 0-10mA DC, or 1-5V DC) and single-phase power input from the regulating instrument to control the operation, so as to realize the automatic regulation and control of the fluid medium in the process pipeline
It is widely used to control the process parameters of gas, liquid, steam and other media, such as pressure, flow Temperature, liquid level and other parameters shall be kept at the given value