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STK- 8900 Digital Valve Controller
Product Description
The intelligent valve positioner STK8900 is a regulating device that receives a 4 - 20mA DC current signal from current output devices such as a control room or a signal generator, adjusts the air supply pressure input to the valve actuator in proportion, and regulates the valve opening. It can perform powerful functions such as automatic setting, PID control, and HART communication through the built - in central processing unit.
LCD screen and 4 buttons
Partial Stroke Test (PST) function
Built-in automatic/manual switch knob
IP66/NEMA4X protection class
Quick and easy automatic setup
Fault alarm function
Self-diagnosis function
Adopting large-flow pilot valve to accelerate valve action speed
Shock-resistant and vibration-proof design
Partial Stroke Test (PST) function
Built-in automatic/manual switch knob
IP66/NEMA4X protection class
Quick and easy automatic setup
Fault alarm function
Self-diagnosis function
Adopting large-flow pilot valve to accelerate valve action speed
Shock-resistant and vibration-proof design
Input Current Range: 4-20mA DC
Internal Impedance: 500Ω (20mA DC)
Input Air Pressure Range: 0.14-0.7MPa
Stroke Range: 10-150mm, 0-90°
Air Supply Interface Size: PT1/4, NPT1/4
Pressure Gauge Interface Size: PT1/8, NPT1/8
Electrical Interface Size: G1(PF)1/2, NPT1/2
Explosion-proof Grade: Ex ia IIC T5/T6
Enclosure Protection Grade: IP66
Ambient Temperature:
- Normal Operating Temperature Range: 30℃~85℃ (standard type), -40℃~85℃ (low-temperature type)
- Explosion-proof Temperature Range: -40℃~60℃ (T5) / -40℃~40℃ (T6)
Linearity: ±0.5% F.S.
Sensitivity: ±0.2% F.S.
Hysteresis: ±0.5% F.S.
Repeatability: ±0.3% F.S.
Air Consumption: Less than 2.3LPM (Sup. = 0.14MPa)
Flow Rate: Above 100LPM (Sup. = 0.14MPa)
Material: Die-cast Aluminum
Weight: 2.2kg
Internal Impedance: 500Ω (20mA DC)
Input Air Pressure Range: 0.14-0.7MPa
Stroke Range: 10-150mm, 0-90°
Air Supply Interface Size: PT1/4, NPT1/4
Pressure Gauge Interface Size: PT1/8, NPT1/8
Electrical Interface Size: G1(PF)1/2, NPT1/2
Explosion-proof Grade: Ex ia IIC T5/T6
Enclosure Protection Grade: IP66
Ambient Temperature:
- Normal Operating Temperature Range: 30℃~85℃ (standard type), -40℃~85℃ (low-temperature type)
- Explosion-proof Temperature Range: -40℃~60℃ (T5) / -40℃~40℃ (T6)
Linearity: ±0.5% F.S.
Sensitivity: ±0.2% F.S.
Hysteresis: ±0.5% F.S.
Repeatability: ±0.3% F.S.
Air Consumption: Less than 2.3LPM (Sup. = 0.14MPa)
Flow Rate: Above 100LPM (Sup. = 0.14MPa)
Material: Die-cast Aluminum
Weight: 2.2kg
