Mengchuan Instrument Co,Ltd. |
Verified Suppliers
|
|
Product Description 2.1 General The smart positioner accurately
controls valve stroke in response to an input signal of 4~20mA from
the controller. Built-in micro-processor optimizes the positioner’s
performance and provides unique functions such as Auto-Calibration,
PID Control, and HART Protocol Communications. 2.2 Main Features
and Functions The LCD can be checked and the buttons can be
operated without opening the cover which allows use of various
functions of the positioner such as parameter adjustment in
explosive gas atmosphere. User will easily understand the method of
using 4 buttons because it work same in all mode of firmware
interfaces. When unexpected situation like momentary blackout
happens, our positioner boot-time only take 0.5 second and this can
minimize the travel of valve which consequentially increase the
safety of system. Positioner operates normally even there are
sudden changes in supply pressure and / or high vibration
environment. The method of Auto Calibration is very simple. As
an advantage of having very low air consumption, It could greatly
reduce operating costs in large-scale plants. It is compatible
with most of controllers. Variable orifice can be used even to
minimize the hunting occurrence and optimize operating conditions.
Various information about positioner can be processed by HART
communication(Option) Valve system becomes more stable by
outputting analog feedback signal. Different valve
characteristics can be adjusted – Linear, Quick Open, Equal
Percentage, and Custom which user can make 18 points
characterizations. Tight Shut – Close and Shut - Open can be set.
PID parameters can be adjusted in the field without any
additional communicator. A/M switch can be used to direct supply
air to the actuator or to manually operate the positioner or valve
without any signal. Split range 4~12mA or 12~20mA can be set.
Operating temperature for positioners is -30 ~ 85℃ or -40 ~ 85℃
(Please check certified explosion proof ambient temperature) Hand
calibration function can set Zero point or End point manually. It
has IP66 protection grade. Epoxy polyester powder coating resists
the corrosion process. (except YT-3450). Maintenance of the
positioner is easy because of modularized inner structure. SIL2
certified.(For more information, see SIL Safety Instruction on
homepage
Acting type | Single Double |
Lever Type | 10 ~ 40 mm |
Rotary | M6 x 63L |