Greenheck S70-003 User Manual
R
™
4
Red
Round
Rotary
Reliable
Electric Actuator
RUGGED ELECTRIC
ACTUATOR FOR
ROTARY VALVES
300 TO 6,500 LB-IN
OUTPUT TORQUE
Bray Controls’ years
of proven success in
electric actuation,
combined with inno-
SERIES 70
trol. This red, round electric
actuator for rotary valves
delivers highly reliable service.
vative engineering,
has produced the R4.
The R4 features on-off
or modulating con-
™
™
4
R
Bray’s unique, customer–friendly
designed Control Center has
many advantages over present
industry standards including:
• UL, CSA and CE certification of
most units
• Ease of customer field wiring
directly to the terminal strip
without interference from
other components
• Simple and unique manual
override handwheel system
• Lowest profile and lightest
weight actuator on the market
• Simple finger or screw driver
adjustment of travel limit
cams without interference
from other components
• Highly visible valve status
display
• Externally adjustable travel
stops
• Captive housing screws
Additionally, components not
requiring customer access are
protected underneath the Power
Center cover plate.
Red
Round
Rotary
Reliable
LOW PROFILE, COMPACT,
HIGH TORQUE DESIGN
The R4 is by far the most compact,
lowest profile design of any electric
actuator delivering comparable torque
output. Thorough research and many
years of field experience have gone
into the development of this stateof-the-art actuator – the product of
the future. This design offers the
advantages of greatly reduced space
requirements, lighter weight and ease
of installation and maintenance when
compared to other electric actuators.
When mounted directly to Bray valves,
4
is especially compact.
the R
The Bray
4
R
Electric
Actuator
4
compared to a typical actuator,
The R
both mounted to 4" Bray valves.
DIRECT MOUNTING OF THE R
ON BRAY VALVES
Bray actuators mount directly to Bray
valves without using any external
linkage. Field installation is simple
and misalignment is minimized. For
sanitary processing and outdoor
applications, the Bray direct mounting system reduces the possibility
of contamination buildup or corrosion between the valve and actuator.
The mounting pattern complies with
ISO 5211 and VDI/VDE 3845 (NAMUR
recommendations). The R
mounted and operated in any
position. Standard rotation is 90°
reversible. Bray can provide linkages
for mounting the R
requiring 90° rotation. Please consult
the Bray factory for further information.
4
can be
4
to other devices
4
EXTERIOR FEATURES
EXPLOSION PROOF ENCLOSURE
The R4 waterproof/explosion proof unit
is UL NEMA 4,4x,7&9 listed and certified to specifications for hazardous
locations. This rugged, heavy duty
housing contains precision machined
bores and flanges to meet flame path
requirements. The valve position
indicator is viewed from behind a
sodium glass explosion proof window.
This unit is currently available with
800 to 2,000 lb.-in. output torque,
continuous or intermittent duty.
MECHANICAL TRAVEL STOPS
Stainless steel mechanical travel
stops permit precise field adjustment
of actuator movement to specific
degrees of rotation. The travel stops
are located outside the base for easy
readjustment without removing the
cover. Stainless steel lock nuts with
O-ring seals hold the travel stops
securely in place. The travel stops
are normally set at the factory to
allow 0° and 90° travel.
R4 manual override handwheel
with optional spinner.
2
ENCLOSURE (A)
The R4 waterproof unit is UL NEMA 4, 4x
listed. Die-cast aluminum cover and base
are high-quality polyester powder
coated for exceptional corrosion, wear,
impact and ultra-violet resistance. Potential leak paths are eliminated since the
indicator shaft does not protrude
through the enclosure.
MANUAL OVERRIDE (B)
A manual override handwheel is standard on all models to rotate the valve
without electrical power. A yellow
caution stripe around the handwheel
hub indicates the handwheel is engaged
for manual operation.
CAPTIVE COVER BOLTS (C)
The cover is attached to the base by stainless steel bolts. When the cover is removed
the bolts are held captive in the cover.
This prevents time consuming problems
caused from lost or misplaced
bolts.
VALVE STATUS DISPLAY (D)
The R4 features a highly visible valve
status display. Prominently labeled and
color coded – yellow for open, red for
closed – the display indicates valve position through the full range of travel.
The display can be seen from almost
any angle. Made of high impact, heat
and chemical resistant clear polycarbonate, this display withstands caustic
washdown and offers excellent corrosion protection.
ELECTRICAL CABLE CONNECTIONS
(E) (Optional)
A multi-pin, watertight
cable receptacle offers full compatibility
with today’s industrial wiring systems.
Factory pre-wiring prevents errors and
allows quick–connect field installation.
Cordsets with connection/flying leads
or extension cords with connections on
both ends can plug directly into the
receptacle.
E
F
G
CONDUIT ENTRIES (F)
The R4 features two conduit connections
in either NPT or metric threads. One entry
is for power, one for control wiring.
PILOT DRILLED HOLES FOR LOCAL
CONTROL STATION MOUNTING (G)
The conduit entry panel has four holes
which may be easily tapped for the
installation of optional local
Control Station.
A
D
B
C
3
CLEAN AND EASY
ACCESS TO ALL
FIELD WIRING AND
ADJUSTMENTS
Bray has specifically
engineered the R
Control Center for
customer–friendly
convenience. Designed
like a junction box,
4
the R
the easiest access to
terminal block wiring,
cam adjustments and
switch installation.
Accessories are easily
added, either before
installation or after
CONTROL CENTER
nance can be performed with
assured ease and safety.
Bray’s unique design, modular system of components and
accessories, and innovative
features combine to best meet
today’s industrial requirements.
installation. Therefore, the time required
for field start-up and
adjustment is greatly
reduced, and mainte-
offers by far
™
4
4
R
Red
Round
Rotary
Reliable
TORQUE LIMITING
SWITCHING SYSTEM (Optional)
The torque limiting switching system
consists of two SPDT mechanical
switches and two factory calibrated
adjusting screws. The green screw
adjusts the torque limit in the open
direction, and the red screw adjusts
the torque limit in the closed direction. The switches independently
respond to predetermined loads in
both the open and closed travel
directions by sensing the movement
of the worm shaft, and interrupting
the electrical power to the motor.
The switches operate at any point of
actuator travel.
Torque Limit Switches shown with
mounting bracket sectioned for clarity.
R4 APPLICATIONS
The R4 is the ideal choice for process
control applications involving:
• Automation and computer systems
• Butterfly, ball, plug and other
rotary valves
• Dampers, switches, safety and
flow-control devices
• Machine and fixture indexing
• Hostile environments demanding
excellent moisture, chemical and
corrosion resistance
• Long service life and rugged
reliability
INDUSTRIES
Bray’s R4 Electric Actuators are used
in a wide range of industries world
wide, including:
Chemical, Pharmaceutical, Petroleum
Refining and Oilfield, Microelectronics,
Pulp and Paper, Water and Waste
Water Treatment, Brewing, Food
Processing, Beverages, Power,
Marine, Mining, Textile and HVAC.
CONTROL CENTER
FEATURES
TRAVEL LIMIT SPDT SWITCHES
(A)
Bray has provided two SPDT
switches as standard. These durable,
high quality switches are mechanically isolated and electrically independent. The dedicated circuits eliminate
any voltage crossover between the
switches. This switch combination is
used for both open and closed
positions of the valve and requires
only one cam for each direction of
valve travel. Bray’s design provides
synchronicity between motor control
and position display. Switches are
easily accessible without interference
from other components. Each switch
is marked with open or close labels
and the cams are color coded, green
for open and red for close, eliminating the possibility of making wrong
adjustments of travel limits or field
wiring errors.
AUXILIARY SWITCHES (Optional)
Independent dry-contact SPDT
switches are available to indicate
travel position to remote customer
control systems.
AUTOMATIC POWER
CUTOUT SWITCH (B)
The R4 is supplied with a SPDT
mechanical switch which cuts power
to the motor when the handwheel
is engaged for manual operation.
This switch also functions as a safety
emergency shutdown device that
immediately stops the actuator motor
even if electrical power is still being
applied to the motor.
CERTIFICATIONS / APPROVALS
Bray has gained UL, CSA and CE
certifications on most intermittent
and continuous duty actuators. These
certifications insure that the R
been designed to the highest quality
requirements and most stringent
safety standards worldwide.
stantial resources have been
invested to assure our customers
that the
the market and will remain so.
R4 is the best actuator on
4
has
Sub-
4
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