Samson TROVIS 3730-3, Монтаж и эксплуатация

Страница: 27 / 180

EB 8384-3 EN 27
Design and principle of operation
3.7 Technical data
Table 12: Type 3730-3 Electropneumatic Positioner
Type 3730-3 Positioner
The technical data for the explosion-protected devices may be restricted by the
limits specified in the test certificates.
Valve
travel
Adjustable
Direct attachment to Type 3277 Actuator 3.6 to 30 mm
Attachment according to IEC 60534-6 (NAMUR) 3.6 to 300 mm
Attachment according to VDI/VDE 3847 3.6 to 300 mm
Attachment to rotary actuators (VDI/VDE 3845) 24 to 100° opening angle
Travel
range
Adjustable
Adjustable within the initialized travel/angle of rotation of the valve; travel can be
restricted to 1/5 at the maximum.
Set point
w
Signal range 4 to 20 mA · Two-wire device, reverse polarity protection · Minimum span 4 mA
Static destruction
limit
100 mA
Minimum current 3.6 mA for display · 3.8 mA for operation
Load impedance ≤ 8.2 V (corresponds to 410 Ω at 20 mA)
Supply air
Supply air 1.4 to 7 bar (20 to 105 psi)
Air quality acc. to
ISO 8573-1
Max. particle size and density: Class 4 · Oil content: Class 3 · Pressure dew point:
Class 3 or at least 10 K below the lowest ambient temperature to be expected
Signal pressure (output)
0 bar up to the supply pressure · Can be limited to 1.4 bar/2.4 bar/3.7 bar
± 0.2 bar by software
Charac-
teristic
Adjustable
Linear/Equal percentage/Reverse equal percentage
User-defined (over operating software and communication)
Butterfly valve, rotary plug valve and segmented ball valve: Linear/equal percent -
age
Deviation ≤1 %
Hysteresis ≤0.3 %
Sensitivity ≤0.1 %
Transit time Venting or filling with air adjustable separately up to 240 s by software
Direction of action Reversible
Air consumption, steady state Independent of supply air approx. 110 l
n
/h
Air output
capacity
To fill actuator with
air
At Δp = 6 bar: 8.5 m
n
³/h · At Δp = 1.4 bar: 3.0 m
n
³/h · K
Vmax(20 °C)
= 0.09
To vent actuator At Δp = 6 bar: 14.0 m
n
³/h · At Δp = 1.4 bar: 4.5 m
n
³/h · K
Vmax (20 °C)
= 0.15
Permissible ambient temperature
–20 to +80 °C All versions
–45 to +80 °C With metal cable gland
–55 to +80 °C Special version for low temperatures with metal cable gland
(Type 3730-3xxxxxxxx0x0 2 x0xx)
The temperature limits for the explosion-protected devices may be restricted by
the limits specified in the test certificates.