Bray 70 Series Operation And Maintenance Manual

BRAY Series 70 Electric Actuator
Operation and Maintenance Manual
3
inTrOduCTiOn
The Bray Series 70 is a quarter turn electric actuator with
manual override for use on any quarter turn valve requiring
up to 18000 in
.lb of torque. Operating speeds vary between
6 to 110 seconds.
PrinciPle Of OPeratiOn
The Series 70 actuator is basically divided into two internal
sections; the power center below the switchplate, and the
control center above the switchplate. Below the switchplate
the capacitor and gearmotor with its spur geartrain drive a nal
non-backdriveable worm gear output. The override mechanism
for manual operation is also housed here. Above the switch-
plate is where user required, readily accessible components
are placed. The camshaft assembly, limit switches, terminal
strips, torque switches, heater, and servo are all placed here
for easy access. External to the unit are found adjustable me-
chanical travel stops, a large easy to read indicator, the unique
manual override handwheel and dual conduit entry ports. The
external coating is a high quality polyester powder coat which
has exceptional UV as well as chemical resistance.
electrical OPeratiOn
The motors used in the Bray Series 70 are either permanent
induction split capacitor design (single phase AC power),
SCI (Three Phase AC Power) or PM (DC Power). Travel limit
switches are mechanical form (SPDT) with contacts rated at
10 amp (0.8 PF), 1/2 HP 125/250 VAC. In cases where the
torque capacity of the unit is exceeded to the point where the
motor stalls and overheats, a thermal protector switch built
into the motor windings will automatically disconnect the motor
power. Once the motor cools sufciently the thermal protector
switch will reset. Optional torque switches are available in all
units to prevent the possibility of stalling the motor, thus reduc-
ing the necessity for an inoperable thermal cooldown period.
Torque switches installed by Bray are factory adjusted to the
output torque rating of the unit using electronic torque testing
equipment.
NOTICE
Field adjustment of the torque switches is not recommended.
General Electrical Schematic
NOTE: this is only a reference. For the actual wiring diagram refer to
the diagram placed inside the actuator cover.
Mechanical OPeratiOn
Mechanically, the ratio of the gearmotor determines the speed
of the unit. The gearmotor utilizes high efciency spur gears
with various ratios for the different speeds. Initial gear reduction
through the spur gears is then transferred to the worm shaft. The
nal gear reduction and output is through a non-backdriveable
worm gear set. Positioning is determined by an indicator-cam
shaft linked to the output shaft. In the declutchable condition
the manual override drives the worm shaft when engaged.
CAMS
NEUTRAL
OPEN
CLOSE
LIVE
OPEN
CLOSE
MANUAL OVERRIDE SWITCH
TRAVEL LIMIT SWITCHES
CAPACITOR
MOTOR
THERMAL PROTECTOR
TORQUE SWITCHES
FIELD
WIRING
(OPTIONAL)
Single phase power supply.
N.C.
N.O.
COM
COM
N.C.
N.O.
COM
N.O.
N.C.
COM
N.O.
N.C.
N.O.
COM
N.C.
1
2
3
Part nuMbering SySteM reference chart
SerieS tOrque cOde SPeed PrOduct Style VOltage triM
70 AAA X 113 Y Z 536
hOuSing
S
ize
Part nuMber
tOrque
(In.Lbs)
SPeed, ¼ turn
(Seconds)
SuPPly
(Z Voltage)
6 70-003X-113yz-536 300 30/15 0/2/4
6 70-006X-113yz-536 600 30 0/3/4
12 70-008X-113yz-536 800 30/15/6 0/4/8
12 70-012X-113yz-536 1200 30/15/6 0/4/9
12 70-020X-113yz-536 2000 30/15 0/2/3/4/5/6/7/8
30 70-030X-113yz-536 3000 30/18 0/2/3/4/5/6/7/8
30 70-050X-113yz-536 5000 30/18 0/2/3/4/5/6/7/8
30 70-065X-113yz-536 6500 30 0/2/4/5/6/7/8
180 70-13W6-113yz-536 13000 110 0/4
180 70-18W6-113yz-536 18000 110 0/4
Use this chart as a guide to interpret the S70 electric actuator part number.
Note: Not all combinations are possible.
W - DESIGNATES THE OUTPUT BORE DIAMETER
0 2.5 Inches
1 1.97 Inches
X - DESIGNATES THE SPEED
X: 0 1 2 3 4 5
Sec: 60 30 18 10 6 8
Y - DESIGNATES STYLE
A Basic Unit - Declutchable
C 24VAC Unit with 240VAC Servo
D With Interposing Relay Board*
*Only available for 120VAC or 220VAC On/Off units
Z - DESIGNATES THE VOLTAGE
Z:
0 1 2 3 4 5 6 7 8 9
Voltage:
120VAC
12VDC 24VDC
24VAC
220VAC
380V
3-PH
400V
3-PH
440V
3-PH
480V
3-PH
208V
3-PH

Bray 70 Series Specifications

General

Brand	Bray
Model	70 Series
Category	Controller
Language	English