Powers 900X I/P Flowrite II Pressure Regulators - Manual

• Low cost
• Built-in volume booster
• Small size
• Field reversible
• Low air consumption
• Mounts at any angle
• Convenient external Span and Zero adjusts
• Light Weight
• Wide supply pressure range
• Low supply pressure sensitivity
Features
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Supply Pressure Range: ........................................ Min: 3 psig (21 kPa) above
max output
Max: 100 psig (700 kPa)
Supply Pressure Sensitivity: ................................. <±0.15% of span per 10 kPa
at midrange
(<±0.1% of span per psig)
Terminal Based Linearity: ..................................... <±1.0% of span
Repeatability: ........................................................... <0.5% of span
Hysteresis: ............................................................... <1.0% of span
Air consumption (Maximum): ............................... 0.1 SCFM (0.2m 3 /hr)
at midrange
Flow Rate at Midrange (Minimum): ..................... 4.5 SCFM (7.6m 3 /hr ANR) at
25 psig (175 kPa) supply;
12 SCFM (20.0 m 3 /hr ANR) at
100 psig (700 kPa) supply
Port Sizes: ................................................................ 1/4 NPT (pneumatic);
1/2 NPT (electric)
Size: ........................................................................... 2-1/8 in. x 2-1/8 in. x 4 in.
(54 mm x 54 mm x 102 mm)
Weight: ..................................................................... 2.1 lb (0.94 kg)
Impedance (nominal):
512-117 ... 180
512-015 ... 180
512-027 ... 220
Operating Characteristics
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Operating Principle
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Description
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IP Transducers
Series 512
Technical Instructions
IS-P-IP
This transducer is an electropneumatic device that reduces a supply
pressure to a regulated output pressure that is directly proportional to an
electrical input signal. It uses a supply pressure between 18 and 100 psig
(125-700 kPa). An integral pneumatic volume booster is included in the
design to provide high flow capacity (up to 12 SCFM).
Three versions of the compact transducers are available. Listed below
are their model numbers, the current input accepted by each, and output
signal emitted by each.
• 512-117...4-20 mA Input/1-17 psi Output
• 512-015...4-20 mA Input/3-15 psi Output
• 512-027...4-20 mA Input/3-27 psi Output
The I/P transducer is a force balance device
in which a coil (see figure 1 on page 2) is
suspended in the field of a magnet by a flex-
ure. Current flowing through the coil gener-
ates axial movement of the coil and flexure.
The flexure moves against the end of a
nozzle and creates a back pressure in the
nozzle by restricting air flow through it. This
back pressure acts as a pilot pressure to
an integral booster replay. Consequently, as
the input signal increases (or decreases, for
reverse acting), output pressure increases
proportionally. Zero and span are calibrated
by turning easily accessible adjusting
screws on the front face of the unit. The zero
adjusting screw causes the nozzle to move
relative to the flexure. The span adjusting
screw is a potentiometer that limits the cur-
rent through the coil. A thermistor in series
with the coil provides temperature compen-
sation.