POWERFLOW CONTROL CO,. LTD.
Hangzhou Powerflow Technology Co., Ltd. Expertise in Flow Control.
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1. Product Description
YT-1000 series electro-pneumatic valve positioner is a device that receives signal 4-20mA DC from the control system or the controller, and accurately controls valve opening through controlling the intake and exhaust of the pneumatic actuators.
2.Technical Datas
| Enclosure Material | Aluminum Diecasting |
| Set-point Signal | 4-20mA DC |
| Input Resistance | 250Ω |
| Stroke Control Range | 10-150 mm; 0-90° |
| Explosion Proof | Ex d II BT6; |
| Ambient Temperature | -20 - 70℃ (Standard); -40 - 70℃ (Low Temp Type); -20 - 120℃ (High Temp Type) |
| Explosion Proof Temperature | -20 - 60℃ |
| Hysteresis | ± 1.0% F.S |
| Sensitivity | ± 0.2% F.S |
| Repeatability | ± 0.5% F.S |
| Flow Capacity | 80LPM (Sup =0.14MPa) |
| Protection Class | IP65 |
| Weight | 2.7KG |
YT-1000L Flameproof Type
(More models please consult our company)
YT-1000R Flameproof Type
(More models please consult our company)
4. Action principle
YT-1000L Type
When the input signal, the torque motor (1) generate a electromagnetic field, the baffle (2) received and leave away from the nozzle(3). The air which in the pilot valve (4) will be elimination, and push the valve core (8), Air input to the actuator (11) through the base (7). With pressure increase, the push rod (12) go down, the feedback stem (13) pull the spring (16). Until the force between the spring (16)and the torque motor (1) keep balance, the baffle (2) go back. Then the valve core (8) gag the base (7)again, the positioner keep stable.
5. Product type selection