Proportion-Air QB1X Installation and operating instructions

1QBX Installation Guide | 5/17/2017 - SSS
DESCRIPTION / IDENTIFICATION
The QBX series valve uses Proportion-Air closed loop
technology for Pressure control. It gives an output pressure
proportional to an electrical command signal input.
The QB1X is a complete closed loop system consisting of
valves, manifold, housing and electronic controls. Pressure is
controlled by the use of two solenoid valves. One valve
functions as inlet control, the other as exhaust. The pressure
output is measured by a pressure transducer internal to the
QB1X and provides a feedback signal to the electronic
controls. This feedback signal is compared with the command
signal input. A difference between the two signals causes one
of the solenoid valves to open, allowing flow in or out of the
system. Accurate pressure is maintained by controlling these
two valves.
The QB2X is similar to the QB1X but uses a double loop
control scheme. In addition to the internal pressure
transducer, the QB2X receives an electrical signal from an
external sensing device. This primary feedback signal is
compared against the command signal input. This
comparison is then summed with the internal pressure
transducer signal. The gain of the circuit is such that priority is
given to the external feedback signal. A difference between
the command signal and the feedback signal causes one of
the solenoid valves to be activated.
A monitor output is provided for the system measurement. All
QBX valves come standard with an analog voltage monitor
output. QB1X monitor output is an amplified signal from the
internal pressure transducer. QB2X monitor output is a
buffered signal from the primary external transducer
connected to the QB2X.
INSTALLATION
1.Apply a small amount of anaerobic sealant (provided) to the male
threads of the in-line filter supplied with valve.
CAUTION: USE ONLY THE THREAD SEALANT PROVIDED.
OTHER SEALANTS SUCH AS PTFE TAPE AND
PIPE DOPE CAN MIGRATE INTO THE FLUID
SYSTEM CAUSING FAILURES.
2. Install the in-line filter into the port labeled I on QBX valve.
3. For vacuum or vacuum through positive pressure units, the
vacuum supply should be connected to the exhaust port of the
QBX.
4. Connect supply line to the in-line filter port. Connect device
being controlled to port labeled O on QBX valve.
5. For QBX, there are two output ports; one on the size of the
manifold and one on bottom. The working port should be
determined when ordering; check to ensure that the other port is
plugged.
6. Mount valve accordingly.
7. The valve can be mounted in any position without affecting
performance. Mounting bracket QBT-01 (ordered separately)
can be used to attach valve to a panel or wall surface.
8. Proceed with electrical connections.
INSTALLATION & MAINTENANCE INSTRUCTIONS
† Pressure ranges are customer specified. Output pressures other than
100% are available. ‡ Others available
ELECTRICAL
SUPPLY VOLTAGE 15-24 VDC
SUPPLY CURRENT 250 mA
COMMAND SIGNAL 0-10 VDC | 4-20 mA
COMMAND SIGNAL IMPEDANCE VDC=4.75 KΩ | Current=100 Ω
ANALOGE MONITOR SIGNAL
VOLTAGE 0-10 VDC @ 20 mA max
CURRENT 4-20 mA Sinking (sourcing opt)
MECHANICAL
PRESSURE RANGES Vacuum - 175 psig
(760 mmHg (Vac) - 12 Bar)
OUTPUT PRESSURE† 0-100% of range
FLOW RATE 1.2 SCFM @ 100 psig inlet
(34 L/min @ 6.89 Bar)
Cv CAPACITY 0.04
Min CLOSED END VOLUME 2 in3
PORT SIZE 1/8” NPT
FILTRATION RECOMMENDED 20 Micron (included)
LINEARITY/HYSTERESIS <±0.15% F.S. BFSL
REPEATABILITY <±0.02% F.S.
ACCURACY <±0.2% F.S.
WETTED PARTS ‡
ELASTOMERS Fluorocarbon
MANIFOLD Aluminum
VALVES Nickel Plated Brass
PRESSURE TRANSDUCER Silicon, Aluminum
PHYSICAL
OPERATING TEMERPATURE 32-158°F (0-70°C)
WEIGHT 1.02 lb. (0.50 Kg)
PROTECTION RATING IP 65
HOUSING Aluminum
FINISH Black Anodized
SPECIFICATIONS
QBX
Electro-Pneumatic
Pressure Regulator

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ELECTRICAL CONNECTIONS
1. Turn off all power to valve.
2. Identify the valve’s command input and analog
output using the calibration card included in the
package and the ordering information section on the
last page of this sheet.
3. Proceed to the appropriate section corresponding to
the type of valve being installed.
NOTE: ALL COLOR CODES RELATE TO THE
FACTORY WIRED QBT POWER CORD.
CURRENT Sinking Monitor (EC or IC)
Voltage Monitor (IE or EE)
CURRENT Sourcing Monitor (ES or IS)CURRENT COMMAND VALVES (I)
VOLTAGE COMMAND VALVES (E, K, V)
COMMAND SIGNAL CONFIGURATIONS
MONITOR SIGNAL CONFIGURATIONS

3QBX Installation Guide | 5/17/2017 - SSS
All QB2 valves are designed to accept a 0-10 volt second
loop input signal, unless ordered with special option code C2
(4-20 mA second loop input). Reference the following wiring
diagrams for details.
QB2X with 3D Option
QB2X SECOND LOOP CONNECTIONS
QB2X with C2 Option (mA 2nd loop feedback)
CURRENT COMMAND VALVES (I)
VOLTAGE COMMAND VALVES (E, K, V)
COMMAND SIGNAL CONFIGURATIONS
ELECTRICAL CONNECTIONS
1. Turn off all power to valve.
2. Identify the valve’s command input and analog
output using the calibration card included in the
package and the ordering information section on the
last page of this sheet.
3. Proceed to the appropriate section corresponding to
the type of valve being installed.
NOTE: ALL COLOR CODES RELATE TO THE
FACTORY WIRED QBT POWER CORD.
QB2X without 3D Option

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RE-CALIBRATION PROCEDURE
All QBX control valves come calibrated from the factory by trained personnel using precision calibration equipment. The QBX
valve is a closed loop control valve using a precision electronic pressure sensor. Typical drift is less than 1% over the life of the
product. If your QBX valve appears to be out of calibration by more than 1%, it is not likely to be QBX. Check the system for
plumbing leakage, wiring and electronic signal levels. Verify the accuracy of your measuring equipment before re-calibrating.
Consult factory if you have any questions or require assistance. If the QBX valve needs re-calibration, use the procedure
described below:
QB1X VALVES
1. Identify the inputs and outputs of the valve using the model number of the valve, calibration card included with the valve, and
the information provided in this sheet.
2. Connect a precision measuring gage or pressure transducer to the OUT port of the QBX.
NOTE: THERE MUST BE A CLOSED VOLUME OF AT LEAST 1 CU. IN. (17 CC) BETWEEN THE VALVE OUTLET AND
THE MEASURING DEVICE FOR THE VALVE TO BE STABLE.
3. Connect the correct supply source to the IN port of the QBX, making sure the pressure does not exceed the rating for the
valve (See Table 1).
4. Locate the plastic calibration access cap on top of the QBX valve and completely remove it. Located underneath are two
adjustment trim pots, Zero “Z” and Span “S”. See figure 1 for pots location.
5. NOTE: Only use this step if your device is totally out of calibration. If it is
slightly out of calibration, omit this step and move on to paragraph 6. Using a
small screwdriver, turn both trim pots 15 turns clockwise. Then turn both trim
pots 7 turns counterclockwise. This will put the QB roughly at mid-scale.
6. Make correct electrical connections as noted. Make sure there is a proper
meter in place to measure the command input to the QBX.
7. Set the electrical command input to MAXIMUM value.
8. Adjust the SPAN pot until MAXIMUM desired pressure is reached (clockwise
increases pressure).
9. Set the electrical command input to MINIMUM value.
10. Adjust the ZERO pot until MINIMUM desired pressure is reached (clockwise
increases pressure).
11. Repeat ZERO and SPAN adjustments, which interact slightly, until QB1
valve is calibrated back to proper range. Step 6 - 9.
12. Replace calibration access cap.
QB2X VALVES
This section assumes there is a properly scaled and calibrated transducer for use as 2nd loop feedback signal. For
information on re-calibrating Proportion-Air DS series pressure transducers see sheet DS-Installation.pdf
1. Follow, in order, steps 1-5 as noted in the section titled QB1X VALVES .
2. Make correct electrical connections as noted. Make sure there is a proper meter in place to measure the command input to
the QB2X. Make sure the 2nd loop signal is connected.
3. Set the electrical command input to MAXIMUM value.
4. Adjust the SPAN pot until MAXIMUM desired pressure is reached (clockwise increases pressure).
5. Set the electrical command input to MINIMUM value.
6. Adjust the ZERO pot until MINIMUM desired pressure is reached (clockwise increases pressure).
7. Repeat ZERO and SPAN adjustments, which interact slightly, until QB2X valve is calibrated back to proper range. Steps 3 - 6.
8. Replace calibration access cap.
RATED INLET PRESSURE FOR STANDARD QBX VALVES
TABLE 1
MAX. calibrated pressure Max. inlet pressure
Vacuum up to 10 psig (0.69 bar) Consult Factory
10.1 up to 30 psig (0.70 up to 2 bar) 35 psig (2.4 bar)
31 up to 100 psi (2.1 up to 7 bar) 110 psig (7.6 bar)
101 up to 150 psig (7 up to 10.3 bar) 175 psig (12 bar)
FIGURE 1 (QB2X, shown with 3D option)
Hysteresis Span Zero

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DIMENSIONS

6QBX Installation Guide | 5/17/2017 - SSS
Safety Precauons
Please read all of the following Safety Precauons before installing or
operang any Proporon-Air, Inc. equipment or accessories. To conrm safety,
be sure to observe ‘ISO 4414: Pneumac Fluid Power - General rules relang to
systems’ and other safety pracces.
Improper operaon could result in serious injury to persons or loss of life!
1. PRODUCT COMPATIBILITY
Proporon-Air, Inc. products and accessories are for use in industrial pneumac
applicaons with compressed air media. The compability of the equipment is the
responsibility of the end user. Product performance and safety are the responsibility of
the person who determined the compability of the system. Also, this person is
responsible for connuously reviewing the suitability of the products specied for the
system, referencing the latest catalog, installaon manual, Safety Precauons and all
materials related to the product.
2. EMERGENCY SHUTOFF
Proporon-Air, Inc. products cannot be used as an emergency shuto. A redundant safety
system should be installed in the system to prevent serious injury or loss of life.
3. EXPLOSIVE ATMOSPHERES
Products and equipment should not be used where harmful, corrosive or explosive
materials or gases are present. Unless cered, Proporon-Air, Inc. products cannot be
used with ammable gases or in hazardous environments.
4. AIR QUALITY
Clean, dry air is not required for Proporon-Air, Inc. products. However, a 40 micron
parculate lter is recommended to prevent solid contaminaon from entering the
product.
5. TEMPERATURE
Products should be used with a media and ambient environment inside of the specied
temperature range of 32°F to 158°F. Consult factory for expanded temperature ranges.
6. OPERATION
Only trained and cered personnel should operate electronic and pneumac machinery
and equipment. Electronics and pneumacs are very dangerous when handled
incorrectly. All industry standard safety guidelines should be observed.
7. SERVICE AND MAINTENANCE
Service and maintenance of machinery and equipment should only be handled by trained
and experienced operators. Inspecon should only be performed aer safety has been
conrmed. Ensure all supply pressure has been exhausted and residual energy
(compressed gas, springs, gravity, etc.) has been released in the enre system prior to
removing equipment for service or maintenance.
Warning
Improper operaon could result in serious injury to persons or damages to equipment!
1. PNEUMATIC CONNECTION
All pipes, pneumac hose and tubing should be free of all contaminaon, debris and chips
prior to installaon. Flush pipes with compressed air to remove any loose parcles.
2. THREAD SEALANT
To prevent product contaminaon, thread tape is not recommended. Instead, a non-
migrang thread sealant is recommended for installaon. Apply sealant a couple threads
from the end of the pipe thread to prevent contaminaon.
3. ELECTRICAL CONNECTION
To prevent electronic damage, all electrical specicaons should be reviewed and all
electrical connecons should be veried prior to operaon.
Exempon from Liability
1. Proporon-Air, Inc. is exempted from any damages resulng from any operaons not
contained within the catalogs and/or instrucon manuals and operaons outside the
range of its product specicaons.
2. Proporon-Air, Inc. is exempted from any damage or loss whatsoever caused by
malfuncons of its products when combined with other devices or soware.
3. Proporon-Air, Inc. and its employees shall be exempted from any damage or loss
resulng from earthquakes, re, third person acons, accidents, intenonal or
unintenonal operator error, product misapplicaon or irregular operang condions.
4. Proporon-Air, Inc. and its employees shall be exempted from any damage or loss,
either direct or indirect, including consequenal damage or loss, claims, proceedings,
demands, costs, expenses, judgments, awards, loss of prots or loss of chance and any
other liability whatsoever including legal expenses and costs, which may be suered or
incurred, whether in tort (including negligence), contract, breach of statutory duty, equity
or otherwise.
Warranty
Proporon-Air, Inc. products are warranted to the original purchaser only against defects in
material or workmanship for one (1) year from the date of manufacture. The extent of
Proporon-Air’s liability under this warranty is limited to repair or replacement of the defecve
unit at Proporon-Air’s opon. Proporon-Air shall have no liability under this warranty where
improper installaon or ltraon occurred.
Cauon