ZNCN
Positioner Cylinder
Power Cylinder (Regulating Type)
ZNCN / 29000 Series
NUCON Power cylinder ZNCN/29000 series consists of a double acting cylinder, positioner (either pneumatic control / Electro pneumatic control) and suitable link mechanism.
The mountings at rod end and cap end are customized.
NUCON Power cylinder has been designed to operate as an actuator in pneumatic control system to position the actuator in accordance with the control signal.
  • Electrical control : 4 to 20 mA
  • Pneumatic control : 0.2 to 1 bar
Design Features:
Wide range of bore sizes from 32mm to 14"
Strokes up to 1500 mm.
IS0 6431 standard cylinder from 32 to 200 mm
Above 200mm with NUCON standard/customized cylinder
Wide choice of rod end and cap end mountings
Linear characteristics are standard
Special characteristics are optional
Easy reversal action
Direction of piston movement in relation to signal can be reversed by the reversing the cam and rerouting the piping
Customized versions with additional accessories are on request
Additional Features:
Manual override attachment with clutch
Air-lock valves to obtain fail safe stay put position
Volume boosters to increase stroking rate
Limit switches
Position transmitters
Gaiter for piston rod protection
Technical Specifications:
Medium : Compressed air
Filtration : < 5 micron
Moisture : Dew point -1 O0 less than ambient min
Oil : Non lube preferred - Cylinders are pre - lubed
Supply pressure : 1.4 to 7 bar
Control signal :
Pneumatic : 0.2 to 1 bar
Electrical : 4 to 20mA
Temperature range :
Min : 0o C
Max : 70o C
Accuracy : ± 1% F.S
Hysteresis : ± 1% F.S
Sensitivity : ± 0.5% F.S
Repeatability : ± 0.5% F.S
Material of Construction :
Cylinder Barrel
Aluminium alloy, fine drawn, calibrated, and hard anodized up to 200 mm
Carbon-steel, finish honed and hard-chrome-plated above 200mm
Piston Rod
Stainless steel AlSl 420 up to 200 mm bore
Medium carbon steel grade En8 above 200mm
End covers
Aluminium die casting up to 200 mm bore
Cast-iron /Zinc plated Mild steel above 200 mm bore
Link mechanism
Zinc plated carbon steel
Seals
NBR (standard )
Viton (Optional on request)
Material of Construction :
The Power cylinder is a standard pneumatic cylinder whose stroke positioning is regulated by pneumatic/electro-pneumatic feed back signal. The stroke positioning is made by altering electro pneumatic control signal value (4 mA for zero stroke and 20 mA for full stroke). In between stroke is proportional to the band width of 16mA. Similarly in Pneumatic control positioning the signal of 0.2 bar for Zero stroke and 1 bar for full stroke
The Positioner and the Link mechanism are fitted on the top of the cylinder with a rigid bracket. The link mechanism is connected to the piston rod. The feed back cam moves along with the piston rod and provides the feedback signal to the positioner to position the cylinder in line with the control signal
Accessories :
All standard mountings and accessories are available to customer's choice.
Application
Dampers
Furnace Burner Nozzles
Butterfly Valves
Ball Valves
Gate Valves
Ordering Example
ZNCN / 29
+Penumatic Positioner
+Electro Penumatic Positioner
Note : The dimensional data for the sizes below Ø80mm bore and above Ø200mm bore will be provided on request.