Electrical Valve Positioner NE724/SI CHX positioner CHX-724
ELECTRO-PNEUMATIC POSITIONER
Chx700 electric valve positioner converts the 4-20mA DC signal from
the regulator or computer IO port into aerodynamic force, and
drives the regulating valve through single acting or double acting
cylinder to realize angular displacement or linear displacement.
The closed-loop control is realized through the cam feedback
system, so that the regulating valve can achieve accurate angular
displacement or linear displacement proportional to the input
signal.
- standard input signal 4 ~ 20 mA DC 0 ~ 20 mA DC
- split range 4 ~ 12 Ma DC 12 ~ 20 mA DC
- input impedance 220 Ω± 10 Ω
- Maximum feedback angle 95 °
- straight stroke 20-140mm
- positive and negative reaction of control direction
- linear relationship between stroke and signal
- gas supply pressure 0.14 ~ 0.8MPa
- influence of air supply pressure ＜ 0.2% / 10KPA
- ambient temperature - 25 ~ + 85 ℃
- influence of ambient temperature ≤ 0.05% ℃
- protection grade IP54
- gas consumption 0.5m3n/h
Servo slide valve matched with actuator φ 4, φ six
Performance when the actuator load is relatively stable:
- dead band ≤ 0.4%
- hysteresis ＜ 0.7%
- linearity ＜± 1%
Vibration influence (1.5g – 100Hz) ≤ 1%
The shell of the structural material is aluminum alloy with
glutamic acid treatment and electrostatic powder spraying coating
on the outer surface, the cover is polycarbonate, and the internal
parts are stainless steel and aluminum alloy, which are
corrosion-resistant materials and subject to surface technical
treatment.
Incoming interface G1 / 2 or M20 × one point five
Applicable cable φ 5 – φ ten
Air pipe interface ZG 1 / 4 "
Weight: about 2.3kg
