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26/06/19 R5
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DESCRIPTION / IDENTIFICATION
The QPV1 is a high resolution electronic pressure regulator. It
provides a regulated output pressure that is proportional to an
electrical command signal input. The QPV1 is available in a wide
range of calibrated pressure ranges covering vacuum through
150 psig (10 Bar). The QPV1 is available in either 0 -10 VDC or
4-20 mA analog signal types.
The QPV1 is a complete closed loop control valve consisting of two
internal solenoid valves, a manifold, an electronic control circuit
board, and a pressure transducer all contained in a protective
IP65/NEMA4 housing. Pressure is controlled by the use of two
solenoid valves. One valve functions as inlet control and acts to
allow supply media into the system to increase the controlled
pressure. The other solenoid valve acts as the exhaust and will
decrease the controlled pressure by venting to atmosphere.
The inlet solenoid valve operates in a proportional manner to
the current supplied by the QPV1’s electronic control circuit.
This variable orifice affect allows precise control of pressure at
low flow conditions and avoids the digital steps of traditional
ON/OFF solenoids. The ability to vary the inlet solenoid valve
orifice opening in an analog fashion allows the QPV1 to control
pressure with extremely high resolution. The exhaust solenoid
is a standard ON/OFF solenoid and allows excess media to be
vented from the system.
The regulated pressure output is measured by a pressure
transducer internal to the QPV1. This pressure transducer
provides a feedback signal to the QPV1’s electronic control circuit.
The control circuit compares the internal sensor feedback signal
to the command signal input. Any difference between the two
signals causes the appropriate solenoid valve to open, allowing
flow in or out of the system. Accurate pressure is maintained by
controlling these two valves.
The QPV1 is a relatively low flow regulator. This makes the QPV1
a great choice any time low flow rates or small volumes require
precise pressure control. The QPV1 is often used to provide
the pilot pressure signal to the dome of either an Equilibar®
back pressure regulator or an Equilibar® vacuum regulator. The
QPV1 can then be used to electronically control back pressure
or vacuum pressure in line sizes from 1/8 inch through 6 inch by
pilot operating the appropriately sized regulator.
An electronic monitor output signal from the internal pressure
transducer is provided. All QPV1 valves come standard with an
analog voltage monitor output. A 4-20mA monitor is available
optionally.
The QPV1 series is available in two generations. The older ‘T’
models used brass hex fittings in the side of the canister for
the inlet and outlet port connections. An improved ‘M’ series
uses a solid aluminum base with integral inlet and outlet ports.
Both models have identical performance and are pin- for-pin
compatible. Both models use the same control circuit, solenoid
valves, electrical connector, and internal pressure sensor.
QPV1 Electronic Pressure Regulator
INSTALLATION AND MAINTENANCE INSTRUCTIONS
¹ Others available
ELECTRICAL
SUPPLY VOLTAGE
15-24 VDC
SUPPLY CURRENT
350mA required.
COMMAND SIGNAL
VOLTAGE 0-10 VDC single ended
CURRENT 4-20 mA differential
COMMAND SIGNAL IMPEDANCE
VOLTAGE 10 KΩ
CURRENT 100 Ω
ANALOG MONITOR SIGNAL
VOLTAGE 0-10 VDC @ 10mA max
CURRENT 4 - 20 mA (Sourcing @ 12 VDC)
PNEUMATIC
PRESSURE RANGES
29.9 in. Hg (vac) - 150 psig
760 mmHg (vac) - 10.34 BAR)
FLOW RATE
Based on the inlet valve orifice size
(ORDERING INFORMATION)
MINIMUM VOLUME
1 cubic in (17cc)
FILTRATION RECOMMENDED
20 micron nominal (included)
LINEARITY/HYSTERESIS
<±0.15% F.S. BFSL
REPEATABILITY
<±0.02% F.S.
ACCURACY
<±0.2% F.S.
RESOLUTION
<±0.02% F.S.
WETTED PARTS¹
Elastomers - Fluorocarbon
Manifold - Brass, Anodized Aluminum
Valves - Nickel plate brass
P.Transducer - Silicon, Aluminum
PHYSICAL
OPERATING TEMPERATURE
32-158ºF [0-70C]
WEIGHT
1.02 lb [0.50 Kg]
PROTECTION RATING
NEMA 4 / IP65
HOUSING
Aluminum
FINISH
Black Anodized Aluminum
SPECIFICATIONS
