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SMC Networks ZK2 A Series Operation Manual

Vacuum unit, ejector / vacuum pump system
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No. ZK2-OM01301
PRODUCT NAME
Vacuum Unit
Ejector / Vacuum Pump System
MODEL / Series / Product Number
ZK2*A Series

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Summary of Contents for SMC Networks ZK2 A Series

  • Page 1 No. ZK2-OM01301 PRODUCT NAME Vacuum Unit Ejector / Vacuum Pump System MODEL / Series / Product Number ZK2*A Series...

  • Page 2: Table Of Contents

    Contents Safety Instructions 1. How to Order 2. Summary of Product Parts 3. Installation 3.1. Installation 3.2. Air Supply 3.3. Piping 4. Solenoid Valve 5. Pressure Sensor/Pressure Switch 6. Construction/Replacement Parts 6.1. Construction for Single Unit 6.2. Component Parts 6.3. Replacement Parts 6.4.

  • Page 3: Safety Instructions

    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) and other safety regulations.
  • Page 4 Safety Instructions Caution 1. The product is provided for use in manufacturing industries. The product herein described is basically provided for peaceful use in manufacturing industries. If considering using the product in other industries, consult SMC beforehand and exchange specifications or a contract if necessary.
  • Page 5 ■Safety Instructions Warning Do not disassemble, modify (including the replacement of board) or repair other than instructed in this manual. Otherwise, an injury or failure can result. Disassembly prohibited 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.
  • Page 6 Caution Do not touch the terminals and connectors while the power is on. Otherwise electric shock, malfunction or damage to the switch can result. Do not touch 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.
  • Page 7 ● Product handling  Installation - Tighten to the specified tightening torque. If the tightening torque is exceeded, the product, the mounting screws, brackets and the pressure switch can be broken. Insufficient torque can cause displacement of the product and the pressure switch from each proper position and loosening of the mounting screws.
  • Page 8  Operating environment - Do not use in an environment where corrosive gases, chemicals, sea water, water or steam are present. These may cause failure or malfunction. - Do not use the product in a place 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 solenoid valve or pressure switch/sensor may be adversely affected (damage, malfunction, or hardening of the lead wires).
  • Page 9  Piping - Preparation before piping Before piping, perform air blow (flushing) or cleaning to remove any cutting chips, cutting oil, dust, etc. from the piping. - Wrapping of pipe tape When installing piping or a tube fitting into a port, prevent cutting chips and sealant material from getting inside the product. If a sealant tape is used, leave 1 thread exposed at the end of threads.

  • Page 10: How To Order

    1. How to Order ■Single Unit Ejector System ZK2 A 12 K 5 A L A - 08 - Vacuum Pump System ZK2 P 00 K 5 A L A - 08 - (1) (2) (3) (4) (5) (6) Remains blank when no option is selected.
  • Page 11 (5) Pressure Sensor/Pressure Switch for Vacuum Symbol Type Pressure range [kPa] Specifications 0 to -101 Analog output 1 to 5V Note 10) Pressure sensor -100 to 100 Analog output 1 to 5V Note 12) Unit selection function 2 outputs Note 13) SI unit only 0 to -101 Note 12)
  • Page 12 Note 16) (7) Vacuum (V) port Symbol Standard Port size ø6 One-touch fitting Metric size ø8 One-touch fitting ø1/4” One-touch fitting Inch size ø5/16” One-touch fitting Note 16) Supply port (PV) size of single unit: ø6 (mm), ø1/4” (inch) Note 17) (8) Options Symbol Type...
  • Page 13 ■Manifold ZZK2 04 A - A 1 L - (2) (3) (4) Remains blank when no option is selected. Note 1) (1) Number of stations Symbol Stations 1 station 2 stations 10 stations Note 1) In the case of an ejector, for an adequate performance, the number of stations when operated simultaneously depends on the nozzle diameter.
  • Page 14 (3) Exhaust Symbol System Exhaust type Vacuum pump system Without silencer Note 5) Complex exhaust Note 6) (End plate on both sides) Ejector system Individual exhaust Note 7) (Individual port exhaust, High-noise reduction silencer exhaust) Note 5) The complex exhaust is a combined exhaust method of the common exhaust from the end plate and the direct exhaust from each station.

  • Page 15: Summary Of Product Parts

    2. Summary of Product Parts ■Single unit (Ejector system) Supply valve manual override Valve Assembly Release valve manual override Pressure switch for vacuum Air pressure supply (PV) port 2 x ø4.5 Mounting hole Vacuum break flow adjusting needle Exhaust port (nozzle size 1.2, 1.5 only) Silencer exhaust port Vacuum (V) port Filter case...
  • Page 16 ■Pressure switch for vacuum Name Function Output (OUT1) LED LED (Green) is ON when the switch output (OUT1) is ON. (Green) Pressure switch for vacuum: Output (OUT2) LED LED (Red) is ON when the switch output (OUT2) is ON. (Red) Pressure switch for vacuum with energy saving function: supply valve is energized.

  • Page 17: Installation

    3. Installation 3.1. Installation ■ Single Unit 1. DIN rail mounting 1) Insert a precision screwdriver into the groove of the release lever and push in direction (1), and slide the filter case in direction (2). 2) Hook the ejector onto the DIN rail from direction (3) and mount the ejector onto the DIN rail by pushing it down in direction (4).
  • Page 18 3. Bracket mounting 1) Fix the body with the brackets before mounting, using the holes in the body (2 x ø4.5). 2) Mount the body using the holes in the brackets. M4x20 (Tightening torque: 0.75N・m) Note) Note) Mounting bracket for single unit (Option) [Nuts and bolts are included.] Part number: ZK2-BK1-A ■...

  • Page 19: Air Supply

    3.2. Air Supply ■Use clean air (1) Using compressed air which contains chemicals, synthetic oils containing organic solvents, salts or corrosive gases, etc. can cause damage or malfunction. Do not use compressed air containing toxic impurities. (2) If the compressed air contains excessive drainage or carbon powder, it can stick to the vacuum generating part (the nozzle diffuser) or inside of the solenoid valve or the pressure switch for vacuum and cause deterioration of the performance or operation failure.

  • Page 20: Piping

    3.3. Piping ■ Single unit The sizes of the each port are as follows. (Refer to Application and Operating Pressure Range on page 20.) Size Vacuum Pump System Port Ejector System Metric Inch Metric Inch ø1/4” ø6 ø6 ø1/4” ø6, ø8 1/4”, 5/16”...
  • Page 21 ■ Application and Operating Pressure Range Port Description Ejector System Vacuum Pump System Air pressure supply port Compressed air supply for operating ejector Note 1) (Operating pressure range) 0.3 to 0.6 MPa Vacuum pressure supply port Vacuum source (vacuum pump) (Operating pressure range) 0 to -100 kPa Pilot pressure supply port...
  • Page 22 ■Precautions 1. Insertion of the tube (1) Cut the tube perpendicularly, being careful not to damage the external surface. Use SMC’s tube cutter TK-1, 2 or 3 for cutting. Do not cut the tube with pliers, nippers, scissors, etc. 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 be connected securely, causing the tube to come off or air leakage after the tube is connected.
  • Page 23 4. Piping (1) Allow a sufficient margin of tube length when piping, in order to prevent twisting, tensile, moment loads, vibration or impact being applied to the tubes and fittings. This can cause damage to the tube fittings and crushing, bursting or disconnection of tubing. (2) Piping to the product is assumed to be static piping.

  • Page 24: Solenoid Valve

    4. Solenoid Valve ■ Manual override operation Manual override is non-locking push type. Push the manual override with a screwdriver of a diameter smaller than indicated in the diagram until it reaches the end. Confirm that the product operates safety before the manual override is operated. Supply valve manual override Release valve manual override Green...
  • Page 25 ■ Continuous duty If a supply valve is energized continuously for a long time, the rise in temperature due to heat-up of the coil may cause a decline in solenoid valve performance, reduce service life, or have adverse effects on peripheral equipment.
  • Page 26 (2) Common wiring Align the socket connector of the cable and the plug connector of the manifold. Insert the socket connector of the cable into the plug connector of the manifold vertically. If the connector is pushed forcibly, the pin will bend and the connector cannot be joined. Example) D-sub connector 2.
  • Page 27 2) Common wiring 2-1) D-sub connector A D-sub connector conforming to MIL standards is used. 2-2) Flat ribbon cable connector A flat ribbon cable connector conforming to MIL standards is used. Triangle mark indicator position -26- No. ZK2-OM01301...
  • Page 28 3. LED indication Red LED turns on when supply valve is energized. Green LED turns on when release valve is energized. (1) Individual wiring (2) Common wiring LED light position LED light position Release valve Release valve Supply valve Supply valve 4.
  • Page 29 (2) Terminal number and Wire color Terminal Wire Terminal Wire Terminal Wire number Color Marking number Color Marking number Color Marking Black None White Brown White Brown None Yellow Pink None Orange Gray Orange None Yellow Black Black White Yellow None Pink Black...
  • Page 30 (2) Terminal number Connector manufacturers’ example HIROSE ELECTRIC CO., LTD. Japan Aviation Electronics Industry, Limited. 3M Japan Limited J.S.T. Mfg. Co., Ltd. Fujitsu Limited Oki Electric Cable Co., Ltd. -29- No. ZK2-OM01301...

  • Page 31: Pressure Sensor/Pressure Switch

    5. Pressure Sensor/Pressure Switch ■Internal circuit and wiring examples Pressure sensor ZK2-PS□-A Pressure switch for vacuum ZK2-ZS□A□□-A ZK2-ZS□B□□-A (NPN 2 outputs) (PNP 2 outputs) The FUNC terminal is connected when using the copy function. (Refer to the ZSE10/ISE10 Operation Manual) Pressure switch for vacuum with energy saving function ZK2-ZSVA□□-A ZK2-ZSVB□□-A...

  • Page 32: Construction/Replacement Parts

    6. Construction/Replacement Parts 6.1. Construction for Single Unit (Including single unit for manifold) (18) Vacuum release flow adjusting needle screw driver operating type (15) (14) (1) (5) (8) (13) (14) (17) Pressure switch with energy saving function Pressure switch for vacuum Pressure sensor (4) (11) (12) (10) High-noise reduction silencer...

  • Page 33: Replacement Parts

    6.3. Replacement Parts Item Remarks Valve assembly Connector for solenoid valve 3 wires (For valve type K, R), Connector assembly 2 wires (For valve type J) One-touch fitting assembly Standard supply (PV) port: ø6, ø1/4” Sound absorbing material 10 pcs. per set Vacuum port adapter assembly With One-touch fitting and filter element Nominal filtration rating: 30 μm, 10 pcs.

  • Page 34: Replacement Parts For Single Unit/How To Order

    6.4. Replacement Parts for Single Unit/How to Order (Including single unit for manifold) (5) Valve assembly ZK2-VA A K 5 L A- [1] [2] [3] [4] [2] Valve type [1] Applicable system Supply valve: N.C., Release valve: N.C. Ejector system Supply valve: Self-holding release valve linked, Vacuum pump system Release valve: N.C.
  • Page 35 (8) Sound absorbing material (10 pcs. per set) ZK2-SE1-1-A Sound absorbing material hole diameter μm (9) Vacuum port adapter assembly (Purchasing order is available in units of 1 piece.) ZK2-VA1S 8 -A One-touch fitting size ø6 One-touch fitting Metric size ø8 One-touch fitting ø1/4”...
  • Page 36 note) (12) Filter case □ ZK2-FC Port for the pressure switch or sensor Symbol Port for the pressure switch or sensor Filter case color With port (type with pressure switch or sensor) Smoke Without port (type without pressure switch or sensor) Clear Note) Vacuum port adapter assembly is not included.
  • Page 37 (14) Lead wire with connector (When individual lead wire is necessary, order with the part number below.) Lead wire with connector for pressure switch for vacuum ZS-39-5G Lead wire with connector for pressure switch with energy saving function ZK2-LW A 20-A Output NPN open collector PNP open collector...

  • Page 38: Exploded View Of Manifold/Replacement Parts

    7. Exploded View of Manifold/Replacement Parts 7.1. Exploded View of Manifold Individual wiring (3)Tension bolt (2) End plate U (1) End plate D U side Single unit for manifold (Individual wiring specification) D side Common wiring -37- No. ZK2-OM01301...

  • Page 39: How To Increase Manifold Stations

    7.2. How to Increase Manifold Stations 7.2.1 Individual wiring specifications 1) Remove two tension bolts. 2) Remove the end plate U. (Be careful not to drop the gasket.) 3) Mount a single unit to the end surface of U side. (Do not let the gasket get caught.) 4) Mount the end plate U with the appropriate length of tension bolts for the number of stations required.
  • Page 40 O-ring Note) When adding a vacuum pump system, the vacuum pump spacer for extra station is required separately. ■ To increase the number of stations from even number to odd number, or increase two stations or more 1) Remove the valve assembly for all stations. (Single unit for extra station is also removed.) 2) Remove the switch assembly if it is present.

  • Page 41: Component Parts

    12) Mount the connector for all stations to the junction box B. (Refer to Fig.3) (Engage the recess of the connector and the protrusion of the junction box B. (Refer to Fig3-A) 13) Mount the junction box B to the junction box A. Push the wires down the side and mount the junction box B to the junction box A following a decreasing mark tube numbers from U side.

  • Page 42: Replacement Parts

    7.4. Replacement Parts Item Remarks Tension bolt assembly 2 pcs. per set Plug for changing PV port to single side supply type Port plug assembly (Common for mm and inch type) Plug for changing PS or PD port to single side supply type Port plug assembly (Common for mm and inch type) One-touch fitting assembly...
  • Page 43 (6) One-touch fitting assembly (Purchasing order is available in units of 10 pieces.) VVQ1000-51A- C8 Port size ø8 One-touch fitting ø5/16” One-touch fitting (7) Sound absorbing material (2 pcs. per set) ZK2-SE2-1-A (8) DIN rail mounting bracket (2pcs. for end plates U and D) ZK2-DA4-A Mounting of DIN rail bracket 1) Mount the DIN rail bracket to each end plate (Note 1).
  • Page 44 (9) DIN rail AXT100-DR - 5 Length symbols L = 12.5 x # + 10.5 (#: Length symbols 1 to 40) L Dimension , refer to “L6” in dimension table in the Best Pneumatics No.4 catalog. (When selecting the number L Dimension 35.5 60.5...
  • Page 45 ■ Plug (For One-touch fitting) (Purchasing order is available in units of 10 pieces.) Mounted onto ports which are not used (PV, PS, PD, etc.) KQ2P- 06 Model and Dimensions Symbol Applicable size ød øD Weight (g) Note ø6 White ø8 20.5 White...
  • Page 46 〇Manifold of more than 3 stations. Single unit of ZK2□A for manifold cannot be assembled with the existing manifold. (Pilot valve dimension and end plate dimension are different). By replacing the manifold end plate assembly with the manifold end plate for ZK2□A, a single unit of ZK2□A for manifold can be assembled.
  • Page 47 〇 Manifold of 1 or 2 stations. A single unit ZK2□A for manifold cannot be assembled with the existing manifold. （Pilot valve dimension and end plate dimension are different) End plate × End plate × There are interference parts within shaded area Existing Manifold ZK2□A...
  • Page 48 ○ Mounting the new product to the existing manifold When the manifold consists of one or 2 stations of the existing valve, or if the 1st or last station need to be replaced, please replace entire manifold to the new product series. No change in the position of the hole for mounting the end plate.

  • Page 49: Maintenance

    8. Maintenance 8.1. Maintenance Implement the maintenance and check shown below in order to use the ejector and the vacuum pump system safely and in an appropriate way for a long period of time. 1 Maintenance should be performed according to the procedure indicated in the Operation Manual. Improper handling can cause damage and malfunction of equipment and machinery.
  • Page 50 9) Be sure to ground the frame ground (FG) terminal when using a commercially available switching power supply. 10) Eliminate any dust left in the piping by using a blast of air before connecting the piping to the product. Otherwise, failure or malfunction may occur. 11) If the fluid contains foreign matter, install and connect a filter or mist separator to the inlet.

  • Page 51: Replacement Procedure

    4) Put the filter back into the filter case following this procedure in reverse. To mount the vacuum port adapter into the filter case, turn the adapter so that the mating mark of the adapter and the case are aligned. (Rotation stops there.) If it is difficult to remove the vacuum port adapter, you can remove the adapter with a hexagon wrench using the hexagonal hole in V port.
  • Page 52 3) To remove the clip that holds the port plug, insert a precision screwdriver from the release lever notch. Move the screwdriver in direction (1) to pull out the clip in direction (2). 4) Remove the port plug. Slide back the release lever. 5) Remove the sound absorbing material from the slit (hole) at the side of the body by using a precision screwdriver.
  • Page 53 8.2.3. Replacement procedure for High-noise Reduction Silencer Assembly Refer to Replacement procedure for Sound Absorbing Material (for Silencer Exhaust) on page 50 to replace the assembly. Note) When a high-noise reduction silencer assembly is attached to System/Body Type “A” (silencer exhaust), the silencing effect cannot be acquired.
  • Page 54 8.2.5. Filter case maintenance 1) When the filter case is dirty, it can be removed and cleaned. To remove the filter case, insert a precision screwdriver into the groove of the release lever and push in direction (1), and slide the filter case in direction (2). Note 1) Surface A of the filter case is the sealing surface when vacuum is generated.
  • Page 55 3) Push the filter case in direction (1). Be careful the filter case hook (A) and hook (B) do not touch the body of the ejector. 4) Slide the filter case in direction (2) while pushing the filter case gently in contact with the ejector. Make sure that the clip (C) is locked and there is no gap in part (D).

  • Page 56: Specifications

    9. Specifications ■General Specifications -5 to 50 C (Without pressure sensor and pressure switch, With pressure switch, Ambient temperature range With pressure switch with energy saving function) (No condensation) 0 to 50 C (With pressure sensor) Fluid 30m/s (Without pressure sensor and pressure switch, With pressure sensor) Note 1) Vibration resistance 20m/s...
  • Page 57 ■Ejector Specifications Model ZK2□07 ZK2□10 ZK2□12 ZK2□15 Nozzle diameter (mm) (L/min(ANR)) Port exhaust Max. suction Silencer exhaust/Complex exhaust (L/min(ANR)) Note 6) flow High-noise reduction silencer exhaust (L/min(ANR)) Note 6) Air consumption (L/min(ANR)) Note 6) Max. vacuum pressure (kPa) Note 7) Supply pressure range (MPa) 0.3 to 0.6 (0.1 to 0.6)
  • Page 58 ■Pressure Switch for Vacuum (For details, refer to the ZSE10/ISE10 series in the Best Pneumatics No. 8 catalog, and the Operation Manual.) Model ZK2-ZSE□□□-A ZK2-ZSF□□□-A (Switch unit: Standard model number) (ZSE10) (ZSE10F) Rated pressure range 0 to -101 kPa -100 to 100 kPa Set/Display pressure range 10 to -105 kPa -105 to 105 kPa...
  • Page 59 ■Pressure Switch for Vacuum with energy saving function (For details, refer to the ZK2-ZSV□□□-A Operation Manual.) Model ZK2-ZSV□□□-A Rated pressure range -100 to 100 kPa Set/Display pressure range -105 to 105 kPa Proof pressure 500 kPa Minimum setting unit 0.1 kPa 12 to 24 VDC ±10%, Ripple (P-P) 10% or less Power supply voltage (Protected against reverse connection)
  • Page 60 ■Weight Single Unit Model of a single unit Weight (g) ZK2P00K□N□A (Vacuum pump, without pressure sensor and pressure switch) ZK2A□K□N□A (Ejector, without pressure sensor and pressure switch) ZK2A□N0NNA (Ejector, without valve) ZK2C□K□N□A (Ejector for manifold, without pressure sensor and pressure switch) Pressure Sensor, Pressure switch for vacuum Model of pressure sensor and pressure switch for vacuum Weight (g)

  • Page 61: Port Layout

    10. Port Layout ■Standard products (No Option) Port Port combination: PV  PS = PD Layout No. Single unit: ZK2P00□□□□A-□ System Vacuum pump Body type Single unit Exhaust type Without silencer Application Vacuum pressure Exhaust purpose Release pressure Same pressure as PS Port Port combination: Common PV ...
  • Page 62 Port Port combination: PV = PS = PD Layout No. Single unit: ZK2A□□□□□□A-□ System Ejector Body type Single unit Exhaust type Silencer exhaust Application Vacuum pressure Exhaust Released in operating environment purpose Release pressure Same pressure as PV Port Layout No. Port combination: PV = PS = PD Single unit: ZK2B□□□□□□A-□...
  • Page 63 Port Layout No. Port combination: PV = PS = PD Single unit: ZK2G□□□□□A-□ System Ejector Body type Single unit Exhaust type High-noise reduction silencer exhaust Application Vacuum pressure Exhaust Released in operating environment purpose Release pressure Same pressure as PV Port Port combination: Common PV = Common PS = Common PD Layout No.
  • Page 64 Port combination: Common PV = Common PS = Common PD Port Layout No. Single unit: ZK2F□□□□□A-□ Manifold: ZZK2□□A-A2□ System Ejector Body type Manifold Exhaust type Individual port exhaust Vacuum pressure Common for each station Application After piping, individual exhaust Exhaust is necessary.
  • Page 65 ■Option -D (With individual release pressure supply(PD) port) Port Port combination: PV  PS  PD Layout No. Single unit: ZK2P00□□□□A-□-D System Vacuum pump Body type Single unit Exhaust type Without silencer Application Vacuum pressure Exhaust purpose Release pressure PD pressure has to be supplied with PS pressure. Port Port combination: Common PV ...
  • Page 66 Port Port combination: PV = PS  PD Layout No. Single unit: ZK2A□□□□□□A-□-D System Ejector Body type Single unit Exhaust type Silencer exhaust Application Vacuum pressure Exhaust Released in operating environment purpose Release pressure PD pressure has to be supplied with PV pressure. Port Port combination: PV = PS ...
  • Page 67 Port Layout No. Port combination: PV = PS  PD Single unit: ZK2G□□□□□A-□-D System Ejector Body type Single unit Exhaust type High-noise reduction silencer exhaust Application Vacuum pressure Exhaust Released in operating environment purpose Release pressure PD pressure has to be supplied with PV pressure. Port Port combination: Common PV = Common PS ...
  • Page 68 Port Port combination: Common PV = Common PS  Common PD Layout No. Single unit: ZK2F□□□□□□A-□-P Manifold: ZZK2□□A-A2□-D System Ejector Body type Manifold Exhaust type Individual port exhaust Vacuum pressure Common for each station Application After piping, individual exhaust is Exhaust necessary.
  • Page 69 ■Option -L (Manifold individual supply specification) Port Port combination: Individual PV  Common PS = Common PD Layout No. Single unit: ZK2C□□□□□□A-□-L Manifold: ZZK2□□A-A1□-L System Ejector Body type Manifold Exhaust type Complex exhaust Application Vacuum pressure PV pressure can be changed per station. Exhaust Released in operating environment purpose...
  • Page 70 Port Layout No. Single unit: ZK2H□□□□□A-□-L Manifold: ZZK2□□A-A2□-L System Ejector Body type Manifold Exhaust type High-noise reduction silencer exhaust Application Vacuum pressure PV pressure can be changed per station. Exhaust Released in operating environment purpose Release pressure Same pressure for common PS pressure and common PD pressure.

  • Page 71: Exhaust/Flow Rate Characteristics

    11. Exhaust/Flow Rate Characteristics 11.1. Ejector Exhaust Characteristics/Flow Rate Characteristics The flow rate characteristics correspond to the standard supply pressure. ■ZK2□07 ■ZK2□10 -70- No. ZK2-OM01301...
  • Page 72 ■ZK2□12 ■ZK2□15 The following graphs show the characteristics of the ejector with valve. (Please contact SMC for models without valve.) -71- No. ZK2-OM01301...

  • Page 73: Vacuum Pump System Flow Rate Characteristics

    11.2. Vacuum Pump System Flow Rate Characteristics The graph shows the suction flow rate characteristics of the vacuum pump system at different vacuum pressure. Flow rate characteristics of different vacuum pressure ■ZK2P00 The actual suction flow at the point of suction varies depending on the piping conditions to the vacuum port. (The above graph shows the value when V port is ø8.) Port size Flow rate characteristics of V to PV (Vacuum side)
  • Page 74 ■ZK2□□□ (Vacuum Pump) The actual suction flow at the point of suction varies depending on the piping conditions to the vacuum port. Note) Port size Flow rate characteristics of PS to V (Vacuum release side) PV port V port C[dm /(s·bar)] ø6 ø8...

  • Page 75: Limitations Of Use

    12. Limitations of Use ■Exhaust from Ejector The exhaust resistance should be as small as possible to obtain the full ejector performance. There should be no shield around the exhaust slit for silencer exhaust type. When the product is installed, one of the ports should be open to atmosphere.
  • Page 76 In addition, the exhaust port should not be blocked or pressurized. If the sound absorbing material is clogged, it will cause a reduction in the ejector performance. Sometimes, if the operating environment contains a lot of particles or mist, the replacement of the filter element only is not enough to recover vacuum performance –...

  • Page 77: Troubleshooting

    13. Troubleshooting ■Troubleshooting chart When any malfunction is observed, it is recommended to perform the following troubleshooting. Failure phenomenon Possible causes Countermeasures Vacuum is not Clogging by foreign matter or particles Refer to (1) and (2) generated Decline in the power Refer to (3) and (4) supply voltage Electrical wire failure...
  • Page 78 ■Countermeasure Countermeasure Oil mist in the supply air or particles in the piping cause clogging if they enter into the ejector. This may cause operation failure. Blow the air piping with air to eliminate particles. It is recommended installing the mist separator and air filter for cleaner supply air. Perform regular maintenance for mist separator and filter.
  • Page 79 Countermeasure When the ejector vacuums the workpiece, high speed air coming out of the nozzle collides into the diffuser I.D. and bounces back, generating vibration in the exhaust air. Because of this, the vacuum pressure fluctuates slightly and is not stabilized. There should be no functional problem with the ejector.
  • Page 80 Revision history 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN Tel: + 81 3 5207 8249 Fax: +81 3 5298 5362 http://www.smcworld.com Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer. © 2019 SMC Corporation All Rights Reserved -79- No.

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