Powers 593 Series Flowrite II Heavy Duty Bronze Globe Control Valves - Manual

FEATURES
• Compact design can be installed in any position
• Low maintenance epoxy coated aluminum manifold hous-
ing and stainless steel external parts resist corrosion
• Good dynamic response, adjustable combination of pro-
portional band and air exhaust capacity
• Not sensitive to mechanical vibrations
• Rugged design, very easy to repair
• Only one moving valve part, therefore, less sensitive to
clogging
• Usable as positioner or as motion transmitter
• Standard yoke mounting per IEC 534-6
APPLICATIONS
The 147-3000 Pneumatic Positioner Relay improves control
system performance by providing the following functions:
• .....Elimination of valve movement caused by line pressure
variations
• ...............................Minimize effects of stick-slip (hysteresis)
• ...........................................................Faster valve movement
• ......................Increased close-off rating when I/P’s are used
• ............................................................................Split ranging
OPERATION
The 147-3000 single acting positioner assures an exact rela-
tionship between actuator valve stem position and controller
input signal. Operating on the time-proven force balance
principle, valve stem motion is transferred through a feed-
back spring which opposes the force produced by the input
signal diaphragm. Supply air is fed through a pneumatic
three-way valve which has output pressure to the diaphragm
actuator that is varied as a result of movement of the feed-
back arm. Any change in instrument signal pressure or exter-
nal actuator force will either increase or exhaust positioner
output pressure causing movement of the actuator stem until
an equilibrium is reached. Stepless combination of gain
adjustment and stroking speed control provides unusual
capability of matching valve performance with process loop
system dynamics..
TECHNICAL INSTRUCTIONS
SINGLE ACTING POSITIONING RELAY
147-3000 A Watts Industries Co.
OPERATING
Ambient Temperature Range
-10°F to 150°F (-23°C to 65°C)
Travel See Back Page
Signal Input 3–15, 3–9, 9–15 psi
Maximum Open Loop Gain 150:1
Minimum Open Loop Gain* 50:1
Steady State Air Consumption 9 psi signal / 20 psi supply 0.10 SCFM
Linearity <±1.3% of span
Hysteresis <0.4% of span
Dead Band <0.2% of span
Threshold Sensitivity <0.07% of span
Supply Pressure Effect 0.12% of span per psi
Ambient Temperature Effect 0.1% per 2°F
Travel Time 46 in2 Actuator @ 20 psi Supply Air In* 1.8 sec. for 1/2"
Air Out* 2.1 sec. for 1/2"
75 in2 Actuator @ 20 psi Supply Air In* 3.8 sec. for 3/4"
Air Out* 2.3 sec. for 3/4"
PHYSICAL
Air Connections
1/4" NPT Instrument and Supply
1/8" NPT Output and Gauge
Body Materials Manifold Housing Material Anodized Epoxy Coated Aluminum
Upper Housing Material High Strength Polyamide
External Feedback Parts Stainless Steel
Shipping Weight 1.2 lbs. (.544kg)
Dimensions 2-1/4" x 3-1/16" x 4-1/4"
(5.7 cm x 7.8 cm x 10.8 cm)
Supply Air Maximum of 50 PSI Maximum of 30 PSI
Pressure PSI with 46 Actuator With 75 Actuator
*@ Maximum speed setting (gain screw flush).
SPECIFICATIONS
Form TI147-POS