Type YT-1000L Electro-pneumatic valve positioner is used for operation of pneumatic linear valve actuators by means of electrical controller or control system with an analog output signal of DC 4 to 20 mA or split Ranges.
The main function of the valve positioner:
1. It is used to improve the quality and movement speed of the regulating valve, mainly due to the guarantee of an amplifier and sufficient air source pressure.
2. It is used to increase the output force, mainly used for high pressure difference, high pressure medium, high temperature, low temperature and large diameter valve occasions.
3. It is used for electricity-pneumatic conversion. At present, most regulating valves are matched with computers, and the computer outputs mostly 4-20mA current signals. Electro-pneumatic valve positioners can be used to meet the requirements.
4. For split-range adjustment, two regulating valves operate a set of equipment respectively, one regulating valve receives 4-12mA electric signal, and the other valve receives 12-20mA electric signal.
5. Used to change the flow characteristics. The inherent flow characteristics of the original valve can be realized by a positioner, for example:
(1) The original quick opening characteristic can be changed to linear or equal percentage characteristic by the positioner.
(2) The original linear characteristic can be changed into an equal percentage characteristic by the positioner.
(3) The original approximate equal percentage characteristic can be changed to equal percentage characteristic through the positioner.
6. It is used for two-position action to become proportional action.
7. It is used for the reverse action of the valve. Through the positioner, the air-open valve can be changed to air-closed valve, and the air-closed valve can also be changed to air-open valve.
8. When the length of pneumatic signal pipeline is large, generally ≥150M.
According to the power supply mode, it can be divided into: separate power supply and without separate power supply.
Smart valve positioners usually only need a 4-20mA current signal to achieve control functions. When a 4-20mA current signal cannot meet the power consumption requirements of the positioner, an additional 24VDC power supply can be added.
According to the explosion-proof type: no explosion-proof, gas explosion-proof, dust explosion-proof.
According to the explosion-proof structure: intrinsic safety, explosion-proof, increased safety, encapsulation, etc.
Contact: Vison Chan
Email: firstname.lastname@example.org , email@example.com
Add: EAA Central Industrial Zone,Wenzhou,Zhejiang Province,China