Precision digital control with proven reliability Bray’s Series 6A
positioners were designed with ease of installation, simple calibration,
efficiency and economy in mind. Units for rotary single acting and
double acting actuators are offered as standard. Intrinsically safe
versions are also available.
Bray’s BUS positioners offer all Series 6A features plus increased
network communication and remote access to positioner parameters and
Calibration is easily performed by entering only
three parameters into keypad push buttons. The less than 5 minute
calibration process automatically determines the position of the travel
limit stops, then measures and records the parameters for both the open
and close positions.
Designed for hazardous and severe applications,
Series 6A explosion proof positioners offer all the features of the
waterproof units in a flame-proof enclosure.
The automatic calibration keypad push buttons in the explosion proof
units are externally mounted and easily accessible behind a flap. The
units can be controlled locally, even during operation, without removing
the housing cover. The LCD display is viewed from behind a sodium glass
explosion proof window.
Waterproof/Explosion Proof enclosures meet NEMA 4,4x,7 & 9
specifications and are constructed of die cast aluminum with an epoxy
coating for chemical and corrosion protection. Waterproof Stainless
Steel available upon request.
ON-LINE ADAPTIVE CONTROL: During
operation, the unit continually optimizes control behaviors and travel
times in response to changes in line media pressure
Series 6A positioners feature corrective and preventative maintenance
self-diagnostic checks. All diagnostics run constantly, may be
continually monitored, and recorded
AIR SUPPLY MONITOR: An
additional feature of the Series 6A is an internal monitor that
transmits a fault signal alarm if the air supply fails. The alarm is
shown locally on the LCD and may be sent to the remote control panel
LOCAL POSITION ADJUSTMENT: Valve
position can be manually adjusted locally by removing the housing
cover, then using the push buttons to override the remote command signal
FLOW RESTRICTORS: Precise control of even the smallest pneumatic actuators through internal Flow Restrictors
POSITION INDICATOR: In addition to the LCD display, valve position is clearly shown over a distance by a yellow indicator
LOCKING DEVICE: For high vibration applications, the Series 6A features, as standard, a friction clutch locking device