SMC Networks ZA Series User manual

Doc. no. DOC1058584
PRODUCT NAME
Compact Vacuum Ejector
MODEL / Series / Product Number
ZA Series

Doc. no. DOC1058584
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Contents
Safety Instructions 2
1. Specification 5
2. Names of Product Components 5
3. Mounting and Installation 6
3.1. Mounting 6
3.2. Environment 7
3.3. Air Supply 8
3.4. Piping 9
3.5. Wiring 11
4. How to Order 12
5. Dimensions 12
6. Supply Pilot Valve and Release Valve 12
7. Pressure sensor 15
8. Vacuum Release Flow Adjusting Needle 15
9. Construction and Replacement Parts 16
10. Maintenance and Checks 16
11. Handling Precautions 19
12. Troubleshooting 20

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Compact Vacuum Ejector /ZA Series
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage. These
instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.” They
are all important notes for safety and must be followed in addition to International Standards (ISO/IEC)*1), and
other safety regulations.
*1) ISO 4414: Pneumatic fluid power - General rules and safety requirements for systems and their components
ISO 4413: Hydraulic fluid power - General rules and safety requirements for systems and their components
IEC 60204-1: Safety of machinery - Electrical equipment of machines - Part 1: General requirements
ISO 10218-1: Robots and robotic devices - Safety requirements for industrial robots - Part 1:Robots
etc.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the
equipment or decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results. The expected performance and safety assurance of the equipment will
be the responsibility of the person who has determined its compatibility with the product. This person should
also continuously review all specifications of the product referring to its latest catalog information, with a view
to giving due consideration to any possibility of equipment failure when configuring the equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly. The assembly, operation and
maintenance of machines or equipment including our products must be performed by an operator who is
appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is
confirmed.
1. The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2. When the product is to be removed, confirm that the safety measures as mentioned above are
implemented and the power from any appropriate source is cut, and read and understand the specific
product precautions of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Our products cannot be used beyond their specifications. Our products are not developed,
designed, and manufactured to be used under the following conditions or environments.
Use under such conditions or environments is not covered.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Use for nuclear power, railways, aviation, space equipment, ships, vehicles, military application, equipment
affecting human life, body, and property, fuel equipment, entertainment equipment, emergency shut-off
circuits, press clutches, brake circuits, safety equipment, etc., and use for applications that do not conform
to standard specifications such as catalogs and operation manuals.
3. Use for interlock circuits, except for use with double interlock such as installing a mechanical protection
function in case of failure. Please periodically inspect the product to confirm that the product is operating
properly.

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Compact Vacuum Ejector /ZA Series
Safety Instructions
Caution
We develop, design, and manufacture our products to be used for automatic control equipment, and
provide them for peaceful use in manufacturing business.
Use in non-manufacturing business is not covered.
Products we manufacture and sell cannot be used for the purpose of transactions or certification specified in the
Measurement Act.
The new Measurement Act prohibits use of any unit other than SI units in Japan.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1. The warranty period of the product is 1 year in service or 1.5 years after the product is delivered, whichever is
first.∗2)
Also, the product may have specified durability, running distance or replacement parts. Please consult your
nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility, a
replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage incurred due to
the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers noted in the
specified catalog for the particular products.
*2) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum pad or failure due to
the deterioration of rubber material are not covered by the limited warranty
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass destruction
(WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the relevant
security laws and regulations of the countries involved in the transaction. Prior to the shipment of a SMC
product to another country, assure that all local rules governing that export are known and followed.

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■Safety Instructions
Warning
Disassembly
prohibited
■Do not conduct disassembly, modification (including the replacement of board), or
repair that is not instructed in this manual.
Otherwise, an injury or failure can occur.
Do not
■Do not operate the product outside of the specifications.
Do not use for flammable or harmful fluids.
Fire, malfunction, or damage to the product can result.
Verify the specifications before use.
Do not
■Do not operate in an atmosphere containing flammable or explosive gases.
Fire or an explosion can result.
This product is not designed to be explosion proof.
Do not
■Do not use the product in a place where static electricity is a problem.
Otherwise it can cause failure or malfunction of the system.
Do not
■Do not cut off the power and compressed air supplied to this product while it is
operating.
Otherwise, it can cause injury due to dropping of workpieces or damage to the
system.
Instruction
If using the product in an interlocking circuit.
-Provide a double interlocking system, for example a mechanical system
-Check the product regularly for proper operation
Otherwise malfunction can result, causing an accident.
Instruction
■The following instructions must be followed during maintenance.
-Turn off the power supply
-Stop the air supply, exhaust the residual pressure and verify that the air is released
before performing maintenance.
Otherwise an injury can result.
Do not touch
■Do not touch the terminals and connectors while the power is on.
Otherwise electric shock, malfunction or damage to the product can result.
Instruction
Perform sufficient trial run.
Otherwise, injury or damage to the system can result due to suction failure
depending on the conditions of the suction of the workpiece or the pressure switch
settings.
Perform sufficient verification before using this product.
Instruction
■After maintenance is complete, perform appropriate functional inspections and leak
test.
Stop operation if the equipment does not function properly or there is leakage of fluid.
If there is leakage from parts other than the piping, the product might be broken.
Cut off power supply and stop supplying fluid.
Do not supply fluid if there is leakage.
Safety cannot be assured in the case of unexpected malfunction.

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1. Specifications
Refer to the catalog for product specifications.
2. Names of Product Components
2.1 Names of Product Components
Single unit
Manifold product
Lock nut
Vacuum (V) port
Air suction filter
Silencer
Mounting hole (2 places)
Supply pilot valve
Air pressure supply (P) port
common air pressure supply
(P) port（on both sides）
Mounting hole (2 places)
Manifold base
Supply adapter
Vacuum release flow
adjusting needle.
Vacuum
release valve
Pressure
sensor

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3. Mounting and Installation
3.1 Mounting
3.1.1 Single unit
1) Directly mount the product on the wall surface, etc. by using the mounting holes (2 xφ2.7)
in the side of the body.
2) Use the recommended tightening torque (0.54 to 0.66 Nm) to mount the product.
3.1.2 Manifold product
1) Directly mount the manifold product on the floor surface, etc. by using the mounting holes (2x
φ3.2) in the manifold base.
2) Use the recommended tightening torque (0.54 to 0.66 Nm) to mount the product.
3.1.3 Precautions
1) When mounting the product, ensure there is sufficient space for maintenance and inspection.
2) Tightening to a tightening torque exceeding the recommended tightening torque range may
cause the product and mounting screws to be broken. Insufficient torque can cause
displacement of the body from its proper position as well as as looseness of the mounting
screws.
3) Do not drop or hit the product, or apply an excessive shock to the product. The exterior and
internal parts of the product, supply pilot valve, release valve, and pressure sensor may be
broken, causing the product to malfunction.

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3.2 Environment
1) Do not use the product in an atmosphere where corrosive gases, chemicals, sea water, water,
or steam is present and may adhere to the product. These may cause failure or malfunction.
2) Do not use the product in an environment where the product could be splashed by oil or
chemicals. If the product is to be used in an environment containing oils or chemicals such as
coolant or cleaning solvent, even for a short time, the pressure switch may be adversely
affected (damage, malfunction, or hardening of the lead wires).
3) The suction filter used in this product is a simple one. When used in a dusty or dirty environment,
the filter will quickly clog. If this is the case, consider using the ZFC series or other air suction
filter along with it.
4) Do not use the product in an area with a surge source present. When there are machines or
equipment that generate large surge near the pressure switch (magnetic type lifter, high
frequency inductive furnace, motor, etc.), this can result in deterioration and damage of the
internal elements. Take measures against the surge sources, and prevent the lines from coming
into close contact.
5) Do not use a load that generates a surge. When a surge-generating load such as a relay or
solenoid is directly driven, use the product with built in surge protection.
6) The product is CE/UKCA marked, but not immune to lightning surges. Therefore, take measures
against lightning surges.
7) Do not install this product at a location subject to vibration and impact. Otherwise damage or
malfunction can occur.
8) Do not let foreign matter, such as wire debris, get inside the product because they may cause
a failure or malfunction.
9) Do not use the product in an environment exposed to temperature cycles. Heat cycles other
than ordinary changes in temperature can adversely affect the product.
10) Do not use the product at a location subject to direct sunlight. If the product is exposed to direct
sunlight, shade the product from sunlight. Otherwise it can cause damage or malfunction.
11) Observe the operating fluid temperature and ambient temperature ranges during use of this
product. Operating the product at low temperatures may lead to damage or malfunction due to
frozen moisture in the air. Protection against freezing is necessary. Installation of an air dryer
is recommended for elimination of drainage and water. Avoid abrupt temperature changes even
within the specified temperature range.
12) Do not use the product at a location where it is exposed to radiant heat from surrounding heat
sources. Otherwise, malfunction can occur.

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3.3 Air Supply
3.3.1 Air quality
1) Use of compressed air that contains chemical, synthetic oil containing organic solvent, salt,
corrosive gas, or the like can cause breakage or malfunction of the product. Do not use
compressed air that contains harmful impurities.
2) If the compressed air in use contains a large amount of drainage or carbon powder, it can
adhere to the inside of the vacuum generating part (nozzle, diffuser) of the ejector, solenoid
valve, or pressure switch for vacuum, and may cause performance degradation or
malfunction.
3) As the quality of supply air, the compressed air purity class "2:6:3" in accordance with
ISO8573-1: 2010(JIS B 8392-1: 2012) is recommended. Supply air containing foreign
matter, water, oil or condensate,etc. can cause malfunction of supply valve or release valve.
Install an air filter or mist separator to the upper stream to prevent condensate from
entering to the product and perform maintenance periodically to control the supply air
properly.
※ISO8573-1: 2010(JIS B8392-1: 2012) compressed air purity class
● Solid particles
●Moisture
●Oil content
Class
Maximum particle count per m3 for
particle diameter d(µm)
Class
Pressure dew
point(℃)
Class
Oil
concentration
(mg/m3)
0.1 ˂ d ˂
0.5
0.5 ˂ d ˂
1.0
1.0 ˂ d
˂ 5.0
1
˂ 20,000
˂ 400
˂ 10
1
˂ -70
1
˂ 0.01
2
˂ 400,000
˂ 6,000
˂ 100
2
˂ -40
2
˂ 0.1
3
Not
specified
˂ 90,000
˂ 1,000
3
˂ -20
3
˂ 1
4
Not
specified
Not
specified
˂ 10,000
4
˂ +3
4
˂ 5
5
Not
specified
Not
specified
˂
100,000
5
˂ +7
6
˂ +10
2 : 6 : 3
Air preparation equipment
Screw
Air compressor
Main Line Filter
AFF Series
Refrigerated Air
Dryer
Air filter
AF Series
Regulator
AR Series
Mist separator
AFM series
Vacuum ejector

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3.3.2 Air pressure
1) If the product is used with an operating pressure exceeding the maximum operating
pressure, the product may be broken.
3.4. Piping
3.4.1 Port sizes
The port sizes and operating pressure ranges are listed below.
Note that in the manifold specifications, the ports are common ports of the manifold base.
When supplying from one side, plug the port not in use.
Port sizes and supply pressure range
3.4.2 Piping to ports
1) When piping fittings are connected to the air pressure supply (P) port (M3) for the single unit
type, secure the supply adapter by tightening it by hand, and using a tool to tighten a further
quarter of a turn. (Recommended tightening torque: 0.4 to 0.5 Nm).
2) When piping fittings are connected to the air pressure supply (P) port (M5) for the manifold
type, secure the manifold base by tightening it by hand and using a tool to further tighten one
sixth of a turn.（Recommended tightening torque: 1.0 to 1.5Nm）.
3) Arrange the piping to prevent twisting force, tension, moment loads, vibration, or impact from
being applied to the product body and connected piping parts.
3.4.3 Piping with one-touch fittings
■Tube attachment
1) Take a tube having no flaws on its periphery and cut it off at a right angle. When cutting the
tube, use tube cutters. If the tube is cut by any tools other than a tube cutter, the cut surface
of the tube will be slanted or flat, making it difficult to connect securely, causing the tube to
come off or air leakage after the tube is connected. Also, allow a sufficient margin of tube
length.
2) Grasp the tube and push it in slowly, inserting it all the way to the back.
3) After inserting the tubing all the way to the back, pull it gently to confirm it is secure. If the
tubing is not inserted all the way, air leakage or disconnection can occur.
4) Do not use the product in such a manner that may cause connected tube to be swung or
rotated. The fitting may be damaged.
Port name
Application
Port size and
applicable tube O.D.[mm]
Operating
pressure range
Air pressure
supply(P)port
Compressed air
supply for operating
ejector
Single unit type：M3、Φ4
Manifold type：M5、Φ4、Φ6
0.2 to 0.5[MPa]
Vacuum
(V)port
Connection of suction
equipment including
pad
Φ3.2、Φ4
-

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■ Removal of the tube
1) Press the release button evenly and firmly.
2) Pull out the tubing while keeping the release button pressed. If the release button is not held
down with a sufficient force, the tubing cannot be removed.
3) If the removed tubing is to be reused, cut off the used section of the tubing. Reusing the
squeezed portion of the tube can cause problems such as air leakage or difficulty in removing
the tube.
■ Other manufacturer’s tube
When using a brand of tube other than SMC, confirm that the following specifications are
satisfied with respect to the tube outside diameter tolerance.
1) Nylon tube Within 0.1 ㎜
2) Soft Nylon tube Within 0.1 ㎜
3) Soft polyurethane tube Within ±0.15 mm or −0.2 mm
Do not use tubing that does not meet these outside diameter tolerances. Otherwise, connection
to the fitting may fail, air leakage can happen, or the tube may become disconnected from the
fitting during use.
3.4.4 Precautions for air tubes
1) Route tubes to prevent twisting, tension, moment loads, vibration or impact from being
applied to the tubes. Failure to follow this instruction may cause damage to the fittings,
crushing or bursting of the tubing, or disconnection of the tubing during use.
2) Piping to the product is assumed to be static piping. If the tube moves, it may become worn
due to sliding, elongate due to tensile forces, torn, or disconnected from the fitting. Make
sure that the tube is in a static condition at all times before using.
3) Do not lift the product by holding the tube after piping. This may lead to damage of the filter
case or one-touch fitting.
4) Before piping, perform air blow (flushing) or cleaning to remove any cutting chips, cutting oil,
dust, etc. from the piping Otherwise damage or malfunction can occur.
5) When connecting tubing, consider factors such as changes in the tubing length due to
pressure, and leave enough slack. Failure to do so may result in fitting breakage or
detachment of the tubing.
Refer to Fittings & Tubing Precautions from 1 to 4 shown in Best Pneumatics 6 on SMC’s
website （URL http://www.smcworld.com） for the recommended piping conditions.

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3.5 Wiring
1) Do not strongly pull the lead wires for the supply pilot valve, release valve, and pressure
sensor, and do not lift the body by pulling the lead wire. The interior of the supply pilot valve,
release valve and pressure sensor may be broken, causing the product to malfunction or
come off from the connectors.
2) Avoid repeatedly bending or stretching the lead wires, or placing a heavy load on or applying
a force to them. Repetitive bending stress or tensile stress applied to the lead wire can cause
the sheath of the wire to come off.
If the lead wire can move, fix it near the body of the product.
The recommended bend radius of the lead wire is 6 times the outside diameter of the sheath,
or 33 times the outside diameter of the insulator, whichever is larger.
Replace the damaged lead wire with a new one.
3) Wire correctly. Depending on the details of wrong wiring, the supply pilot valve, release valve,
and pressure sensor may malfunction and may be broken.
4) Do not perform wiring while the product is energized. The interior of the supply pilot valve,
release valve, and pressure sensor may be broken, causing the product to malfunction.
5) Do not route wires and cables together with power or high voltage cables. Route the wires of
the supply pilot valve, release valve, and pressure sensor separately from the power or high
voltage lines in order to prevent noise or surge from entering the signal line.
6) Check the insulation performance of the wiring. If there is any poor insulation (interference
with other circuits, poor insulation between terminals, etc.), an excessive voltage or current
may apply to the supply pilot valve, release valve, and pressure sensor, possibly leading to
breakage.
7) Make sure that reverse current does not flow in when the circuit is opened or the product is
forced to operate for operational checks. Depending on the circuit in use, insulation may not
be maintained, allowing reverse current to flow, which can cause the supply pilot valve,
release valve, and pressure sensor to malfunction or to be broken.
8) Keep wiring as short as possible to prevent interference by electromagnetic noise and surge
voltage. Do not use a cable longer than 10 m. Wire the DC (-) line as close as possible to the
power supply.

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4. How to Order
Refer to the catalog of this product.
5. Dimensions
Refer to the catalog of this product.
6.Supply Pilot Valve and Release Valve
6.1 Manual override
It is possible to generate vacuum and release vacuum by manual operation. Before performing
manual operation, confirm that the safety is ensured even when the product is operated.
Manual operation can be performed by following the steps shown below.
For N.C. type supply pilot valve and release valve
■Non-locking push type（Tool required）
■Locking type（Tool required）
For latching type supply pilot valve
Pressing this button in the direction
indicated by the arrow until it stops
turns it ON and releasing the button
turns it OFF.
Turning the manual switch clockwise to set to the "1"
position and push the switch locks it in an ON state.
Turning the manual switch counterclockwise to set to
the "0" position releases the lock and returns the
manual switch to the original position.
Turning the manual switch clockwise to set to the "1"
position and push the switch locks it in an vacuum
generation state.
Turn the manual switch counterclockwise to the "0"
position to stop the vacuum generation.

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6.2 Connecting/Disconnecting the Connector
To install the connector, while supporting the solenoid valve, insert the connector straight while
holding down the connector lever with your fingers. Ensure that the connector lever clip is properly
inserted into the groove of the cover. To remove the connector, hold the solenoid valve and pull
out the connector straight pushing the connector lever clip.
6.3 Internal circuit
Light/surge voltage suppressor circuit is equipped. While the solenoid valve installed in the product
has no polarity, only the latching type (supply pilot valve) is + common or − common type.
Connector
Groove
Cover
Lever
Simultaneous
energization
protective circuit
Single solenoid type（DC）
Single solenoid type（AC）
Latching solenoid type (DC)
(+ common)
Latching solenoid type（AC）

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6.4 Initial state
When the valve assembly is delivered, the supply valve is on the OFF position, but it may be on
the ON position due to the vibration or impact during transportation or device installation. Move
supply valve to OFF position manually or energizing before use.
6.5. Precautions
1) Use the product at the specified voltage. Otherwise, failure, malfunction or short life can
result.
2) If a valve is energized for an extended period of time without a break, the rise in temperature
due to heating of the coil may cause the solenoid valve performance to decline, reduce the
service life, or have adverse effects on peripheral devices. The energized time in one day
should be shorter than the non-energized time.
3) The supply pilot valve and release valve mounted on this product are VQ100 series. Refer
to the operation manual for the VQ100 Series for details.

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7.Pressure Sensor
7.1 Internal circuit and wiring example
*For details, refer to the operation manual for PSE54□ Series.
7.2. Precautions
1) If a commercially available switching power supply is used, be sure to install the frame ground
(FG) terminal.
2) Do not forcefully pull the lead wire, or lift the product by holding the lead wire (tensile strength:
50 N or below). The pressure sensor may be broken, leading to failure and malfunction.
3) Do not repeatedly bend or stretch the lead wires, or place a heavy load or apply force to
them.
Wiring subject to repetitive bending stress or tensile stress can cause the sheath of the wire
to come off.
If the lead wire can move, fix it near the pressure sensor.
4) Use the pressure sensor at the specified voltage. Otherwise failure, malfunction or short life
can result.
5) Connect a load before turning the power supply on. Turning on the pressure sensor with no
pressure sensor load connected may cause an excessive current to flow, possibly breaking
the pressure sensor.
6) Do not short-circuit the load. The pressure sensor may be damaged.
7) When using the pressure sensor to detect very small pressure differences, warm it up for 20
to 30 minutes first. For 10 minutes after turning on of power supply, the analog voltage may
fluctuate by 1%.
8. Vacuum Release Flow Adjusting Needle.
8.1. Vacuum release flow adjusting method
Vacuum release air is output by turning the release valve ON. The flow rate of vacuum release air
can be adjusted by adjusting the vacuum release flow adjusting needle.
Loosen the lock nut and adjust the vacuum release flow adjusting needle using a flat blade
screwdriver. Turning the vacuum release flow adjusting needle clockwise decreases the vacuum
release flow rate, while turning it counterclockwise increases the vacuum release flow rate.
Tighten the lock nut after finishing the adjustment of the vacuum release flow adjusting needle and
fix the adjusted position.
8.2. Precautions
1) The leakage cannot be completely eliminated when the needle is fully closed. A certain
amount of leakage is allowed for in the product specifications. Tightening the needle to
achieve zero leakage may result in equipment damage.
2) The vacuum release flow adjusting needle has a retaining mechanism. Therefore, it will not
turn further when it reaches the rotation stop position. The needle may break if it is rotated
more than 12 revolutions.
3) When tightening the lock nut, tighten it by approximately 15 to 30 degrees after manually
tightening it. Pay attention not to cause breakage due to over tightening.
PES54□
Voltage output type:1～5V
Output impedance
Approx. 1 kΩ

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9.Construction and Replacement Parts
Refer to the catalog of this product.
10.Maintenance and Checks
Implement the maintenance and checks shown below to use the small-size vacuum ejector safely
and appropriately for a long period of time.
10.1 How to replace the filter element
1) Use a spanner on the hexagonal surface (width across flats: 7 mm) located on the IN side of
the suction filter to remove the suction filter from the product.
2) Use a spanner on the hexagonal surface located on the IN side of the suction filter and a
hexagon wrench on the hexagon socket (width across flats: 2 mm) located inside on the OUT
side, disassemble the suction filter and replace the filter element (ZFC-EL050-X50).
3) Using the spanner and the hexagon wrench, which were used at the time of disassembly, to
assemble the suction filter.
(Recommended tightening torque: 0.5 to 0.7 Nm)
4) Use a spanner on the hexagonal surface located on the IN side of the suction filter to attach the
suction filter to the product.
(Recommended tightening torque: 0.5 to 0.1 Nm)
IN side
OUT side
Air suction filter
Filter element
（ZFC-EL050-X50）

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10.2 How to replace the supply pilot valve and release valve
1) By loosening the two mounting screws, remove the supply pilot valve or release valve.
2) Replace the supply pilot valve or release valve and assemble it by using the two mounting
screws.
(Recommended tightening torque: 0.11 to 0.13 Nm)
10.3 How to replace single unit of manifold type
1) Loosen the screws that assemble the single unit to the manifold base, and remove the unit to
be replaced.
2) Insert the connection part of a new single unit to the connection part of the manifold base while
paying attention to the location of the O-ring.
3) By using the screws that assembled the single unit to the manifold base, secure the single unit.
（Recommended tightening torque: 0.16 to 0.20 Nm）
The screws to secure the single unit to the manifold base and the O-ring at the connection part
can be ordered by the item code ZA1-OP-1 (set containing 10 pieces each).
Supply pilot valve
Mounting screw
Release valve
Mounting screw
O-ring
Single unit product for replacement use
Screw
Single unit connection part
Manifold base connection part

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10.4. Precautions
1) Conduct maintenance according to the procedure indicated in the operation manual. If handled
improperly, malfunction and damage of machinery or equipment may occur.
2) Compressed air can be dangerous when it is handled incorrectly. Protection of the product as
well as element replacement and other maintenance tasks should be performed by a person
with good knowledge and experience with pneumatic devices.
3) Remove drainage from air filters and mist separator periodically. If the collected drainage is
drained to the downstream side, it can stick inside of the product, causing operation failure and
failure to reach the specified vacuum pressure. If the draining management is difficult, use of a
filter with auto drain is recommended.
4) Periodically replace the filter element incorporated in the ejector. It is recommended to replace
the filter element when the pressure drops by 5 kPa as a guide although the replacement cycle
varies depending on the operating conditions, atmosphere in the operating environment, and
supply air quality. However, if there is a vacuum pressure drop and/or delay in the vacuum
(suction) response time which poses a problem with the settings during operation, stop the
operation of the product and replace the filter element regardless of the above-mentioned
replacement guideline.
5) When dismounting the product, turn off the power supply and the supply pressure, discharge
the compressed air from the piping, and check the condition of air release to atmosphere before
starting the work. When mounting the product after conducting various maintenance works,
supply compressed air and power supply, and conduct appropriate function checks and leakage
inspection.
6) Do not disassemble or modify the components other than the components subject to
maintenance specified in this manual.
7) Do not use solvents such as benzene, thinner, etc. to clean the product. Doing so can
damage the surface of the body and erase the markings on the product. Use a soft cloth to
remove stains. For heavy stains, use a damp cloth that has been soaked with diluted neutral
detergent and fully squeezed, then wipe up the stains again with a dry cloth.

Doc. no. DOC1058584
- 19 -
11.Handling Precautions
11.1. Exhaust from the Ejector
The exhaust resistance should be as small as possible to obtain the full performance of the
vacuum ejector.
There should be no shield around the exhaust port for the silencer exhaust specification. Sound
absorbing material is gradually clogged in the following cases:
- Suction of dust in the environment at the time of adsorption, or
- When the air is not clean enough.
Clogging causes resistance in the ejector's exhaust, decreasing suction flow and vacuum pressure.
(Regular replacement of the sound absorbing material is recommended.)
11.2. Exhaust Noise from Ejector
When the vacuum ejector generates vacuum, intermittent sound (abnormal sound) can be heard
from the exhaust port at the standard supply pressure at which the vacuum pressure reaches the
peak. This makes the vacuum pressure unstable.
If the vacuum pressure range is adequate for adsorption, there should not be a problem. If the
noise causes a problem or affects the setting of the pressure switch, change the supply pressure
slightly to avoid the pressure range of the noise.
Vacuum
pressure peak
Region generating noise
Standard supply pressure
Supply pressure
Vacuum
pressure
0