IWAKI EWN-B31 VC Instruction Manual
  1. Manuals
  2. Brands
  3. IWAKI Manuals
  4. Water Pump
  5. EWN-B31 VC
  6. Instruction manual

IWAKI EWN-B31 VC Instruction Manual

Standard electromagnetic metering pump ewn-r series
Hide thumbs
Table of Contents

Advertisement

Quick Links

Iwaki
Electromagnetic Metering Pump
EWN-R (Standard)
Instruction manual
Thank you for choosing our product.
Please read through this instruction manual before use.
This instruction manual describes important precautions and
instructions for the product. Always keep it on hand for quick
reference.
2008 IWAKI CO., LTD.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the EWN-B31 VC and is the answer not in the manual?

Questions and answers

Related Manuals for IWAKI EWN-B31 VC

Summary of Contents for IWAKI EWN-B31 VC

  • Page 1 EWN-R (Standard) Instruction manual Thank you for choosing our product. Please read through this instruction manual before use. This instruction manual describes important precautions and instructions for the product. Always keep it on hand for quick reference. 2008 IWAKI CO., LTD.

  • Page 2: Order Confirmation

    Order confirmation After unpacking, check the following points. Contact us or your nearest distributor if the delivery is imperfect. a. Check if the delivery is as per order. Check the nameplate to see if the in- formation such as discharge capacity, discharge pressure and power voltage are as per order.

  • Page 3: Table Of Contents

    Contents Order confirmation ..................... 2 Safety instructions ............... 6 Warning ......................7 Caution ......................8 Precautions for use ..................10 Overview ..................12 Introduction .....................12 Pump structure & Operating principle ............12 Features .......................14 Operational functions...................14 Part names.......................19 Pump......................19 Operational panel ..................20 Basic displays &...
  • Page 4 Operation ..................37 Before operation .....................37 Points to be checked ...................37 Retightening of pump head fixing bolts ............37 Use of hexagon wrench instead of a torque wrench ......38 Degassing ....................38 Flow rate adjustment ...................41 Stroke rate adjustment ................42 Stroke length adjustment...............
  • Page 5 Maintenance ................76 Troubleshooting ..................... 77 Inspection ....................... 79 Daily inspection ...................79 Periodic inspection ..................79 Wear part replacement .................. 80 Wear part list ....................80 Before replacement ..................81 Valve set replacement .................81 Discharge valve set dismantlement/assembly ........81 Suction valve set dismantlement/assembly .......... 83 Spacer set replacement (Auto degassing type) ........

  • Page 6: Safety Instructions

    Safety instructions Read through this section before use. This section describes important information for you to prevent personal injury or property damage. ■ Symbols In this instruction manual, the degree of risk caused by incorrect use is noted with the following symbols. Please pay attention to the information associated with the symbols.

  • Page 7: Warning

    WARNING Turn off power before work Risk of electrical shock. Be sure to turn off power to stop the pump and related devices before work. Electrical shock Stop operation On sensing any abnormality or danger, suspend operation immedi- ately and inspect/solve problems. Requirement Do not use the pump in anything other than a specified purpose The use of the pump in any purpose other than those clearly speci-...

  • Page 8: Caution

    CAUTION A qualified operator only The pump must be handled or operated by a qualified person with a full understanding of the pump. Any person who is not familiar with Requirement this product should not take part in operation or management. Use a specified power only Do not apply any power other than the one specified on the nameplate.
  • Page 9 Do not use the pump in a water place The pump is not totally waterproof. The use of the pump in water or high humidity could lead to electrical shock or short circuit. Prohibition Earthing Risk of electrical shock. Always earth the pump. Earthing Install an earth leakage breaker An electrical failure of the pump may adversely affect related de-...

  • Page 10: Precautions For Use

    Precautions for use • Electrical work should be performed by a qualified opera- tor. Otherwise, personal or property damage accident may result. Caution • Do not install the pump in the following places where... –Under a flammable atmosphere or in a dusty/humid place. –Under direct sunlight or wind &...
  • Page 11 • Be careful not to drop the pump onto the floor. A strong impact may reduce pump performance. Do not use a pump which has once damaged. Otherwise an electrical leak or shock may result. • The pump is a light water-/dust-proof structure of IP65, but is not totally waterproof.

  • Page 12: Overview

    Overview The information such as characteristics, features and part names are described in this section. Introduction Pump structure & Operating principle The EWN series is a diaphragm metering pump which consists of a pump head, drive unit and control unit. A diaphragm is directly driven by electromag- netic force.
  • Page 13 ● Auto degassing system Discharge port Air vent port Automatic air vent valve body LOCK Air vent valve Pump head valve Pump head Suction port • Once air is entrained through the suction port, the working pressure difference between the pump head valve and the air vent valve separates entrained air from liquid.

  • Page 14: Features

    Features ● Multivoltage operation The EWN-R series is a multivoltage type (100-240VAC) and can be selected without concern for local power voltage. ● High turndown ratio Digitally-controlled stroke rate range is 0.1-100%. The stroke length shifts for a fine flow adjustment. ●...
  • Page 15 Multiplier programming (See page 51) 1-9999 shots can be programmed to one pulse signal. *In the EXT operation, the pump runs at the manual operation stroke rate. *The pump makes one shot per pulse when the multiplier is programmed to 1. Example) When the multiplier is programmed to 5, the pump makes five shots per signal.
  • Page 16 ANA. R (analogue rigid) programming (See page 57) The pump increases/decreases a flow rate in proportion to 0-20mA. Four (4- 20, 20-4, 0-20, 20-0) programs are provided. In "4-20" or "20-4" program a disconnection sensor works to stop the pump as a current value falls below 4mA ("DISCN"...
  • Page 17 ● STOP function (See page 60) The start/stop of the pump can be controlled by the external signal. When "NOR. OP" is selected... The pump stops while receiving the external signal via the STOP terminal. *The pump resumes operation when the STOP signal is released. STOP signal input Pump operation Stop...
  • Page 18 ● AUX function (See page 40) The pump runs at the maximum stroke rate while receiving the external sig- nal via the AUX terminal. Use this function for degassing. Pulse signal input Pump operation 1 2 3 4 5 1 2 3 ●...

  • Page 19: Part Names

    Part names Pump Adjusting screw Used for opening the air vent port. Control unit Used for the start/stop of the Air vent port pump and stroke rate adjust- Always connect a tube. ment/programming. Be sure to return the tube end to a supply tank or a container.

  • Page 20: Operational Panel

    Operational panel Display An operational status, a selected mode and a programmed value are shown here. START/STOP key Used for starting/stopping UP key the pump operation. Used for increasing numeric val- ues or selecting a programming mode. EXT key Used for entering the EXT mode.

  • Page 21: Basic Displays & Pump States

    ■ Basic displays & Pump states STOP LED ON LED lights ON LED lights ON LED blinks lights red orange green green Manual wait The pump state. Display is running in ― shows stroke ― manual mode. rate in %. Display shows stroke rate in %.
  • Page 22 STOP LED ON LED lights ON LED lights ON LED blinks lights red orange green green EXT(Multiply) programming mode. The MULT pump is set ― ― ― to make the displayed # of shots per signal. EXT(Divide) programming mode. The pump is set ―...

  • Page 23: Identification Codes

    Identification codes The model codes of the pump/drive units and the control unit represent the fol- lowing information. Pump/Drive units EWN - B 11 VC f g h a. Series name EWN: Multivoltage electromagnetic metering pump b. Drive unit (Average power consumption) B: 20W C: 24W c.
  • Page 24 e. Tube connection bore Hose size (ID×OD) Wet end materials Pump model VC/VH/PC/PH/TC/VC-C/VH-C/ ø4×ø6*² EWN-09/-11/-16 & -21 VC-A/VH-A VC/VH/PC/PH/TC/VC-C/VH-C/ ø6×ø8*² EWN-09/-11/-16 & -21 VC-A/VH-A ø9×ø12 VC/VH/PC/PH EWN-31 & -36 ø10×ø12 EWN-31 & -36 ø6×ø12 VC-C/VH-C EWN-09/-11/-16 & -21 code*¹ Rc 1/4 FC/SH/SH-H/SH-H2 EWN-11/-16/-21/-31 &...

  • Page 25: Installation

    Installation This section describes the installation of the pump, tubing and wiring. Read through this section before work. Observe the following points when installing the pump. • Be sure to turn off power to stop the pump and related devices before work. •...

  • Page 26: Pipework

    Pipework Connect tubes to the pump and install a check valve. Tube end (Side view) Before operation • Cut the tube ends flat. Necessary tools • Adjustable wrench or spanner Tube connection a. Pass a tube into the fitting nut and Tube hose stopper and then slide it down to Fitting nut...
  • Page 27 Connect an air bleed tube into the Air vent port air vent port. Route back the other tube end to a supply tank or a container. For the auto degassing type, con- Tube nect another air bleed tube into the automatic air vent valve body as well.

  • Page 28: Check Valve Mounting

    Check valve mounting Install an optional check valve to the EWN (or a back pressure valve to the FC type) for the prevention of a back flow, siphon and overfeeding. In the following cases be sure to install the check valve. •...
  • Page 29 Mount a check valve at the discharge tube end. * The CAN/CBN check valve and the BVC back pressure valve have R1/2 and R3/8 thread connections as well as a tube connection. Cut off and adjust the connection length to fit the check valves into tubing. CAN check valve BVC back pressure valve R1/2...

  • Page 30: Wiring

    Wiring Wiring for a power voltage and an external signal. Observe the following points during wiring work. • Electrical work should be performed by a qualified operator. Always ob- serve applicable codes or regulations. • Observe the rated voltage range, or the electrical circuit in the control unit may fail.
  • Page 31 NOTE • Do not share a power source with a high power device which may generate surge voltage. Otherwise an electronic circuit may fail. The noise caused by an inverter also affects the circuit. • Energize the pump with a power voltage via a mechanical relay or switch. Do not fluctuate the voltage, or CPU may malfunction.

  • Page 32: Signal Wire Connection

    Precautions for ON-OFF control by a mechanical relay The control unit is equipped with CPU. Always start/stop the pump by the STOP signal for ON-OFF control. Try not to turn on and off the main power. Otherwise, observe the following points. •...
  • Page 33 NOTE • Do not lay on these signal cables in parallel with a power cable or combine them in a concentric cable (ex. 5 wires cable). Otherwise noise is generated through the cables due to induction effect and it results in malfunction or failure. •...

  • Page 34: Connections

    ■ Connections • Level sensor The EWN have two stage level sensor, the Pre-STOP and STOP alarms. Con- nect the pre-alarm signal to the Pre-STOP and the alarm signal to the STOP. The pre-alarm functions just to notify a low liquid level by flashing the LED orange while the pump is running.
  • Page 35 • Pulse signal In the EXT (MULT or DIV) mode, the pump runs along with a multiplier or a divisor as receiving the pulse signal. • When using an open collector... Pay attention to polarity. Pulse is plus(+), and COM1 is minus(-). (Maximum 2.3mA at 12V) •...
  • Page 36 • OUTPUT signal The pump sends out the OUTPUT signal along with injections or the STOP signal along with the external STOP signal input via a Photo MOS relay. *The maximum applied voltage is 24VAC/DC. 1 : Free 2 : Free 3 : Free 4 : OUT 5 : COM...

  • Page 37: Operation

    Operation This section describes pump operation and programming. Run the pump after pipework and wiring are completed. Before operation Check a flow rate, tubing and wiring. And then perform degassing and flow rate adjustment before starting operation. Points to be checked Before operation, check if...

  • Page 38: Use Of Hexagon Wrench Instead Of A Torque Wrench

    ■ Use of hexagon wrench instead of a torque wrench Fasten the fixing bolts as tight as can be by the hand with the straight long part of a hexagon wrench (a) and further turn the bolts clockwise 90 degrees with the short part (b).
  • Page 39 Points to be checked Air bleed tube • An air bleed tube is connected to the air vent port. • For the auto degassing type, another air bleed tube is connected to the automatic air vent body. Turn on power. The ON LED lights and a display related to the current mode appears on the screen.
  • Page 40 Run the pump at the maximum stroke rate. Select a convenient way from the following. • Set a stroke rate to 100% and run the pump manually. STOP STOP • Enter the external signal via the AUX terminals. AUX signal STOP STOP input...

  • Page 41: Flow Rate Adjustment

    Flow rate adjustment A flow rate can be adjusted by adjusting a stroke rate and stroke length. The stroke rate is indicated in %. 100% stroke rate means the maximum flow rate. Stroke rate adjustment is a main way to adjust a flow rate. Stroke length is the moving distance of the plunger.

  • Page 42: Stroke Rate Adjustment

    Flow rate, stroke rate and stroke length B type C type Fixed stroke rate Fixed stroke rate Stroke rate is fixed at 100% Stroke rate is fixed at 100% Stroke rate is fixed at 75% Stroke rate is fixed at 75% Stroke rate is fixed at 50% Stroke rate is fixed at 50% Stroke length adjustment...
  • Page 43 Turn on power and call up manual mode. Enter manual mode to indicate a stroke rate on the screen. • Push the start/stop key when "MULT", "DIV", "ANA.R" or "ANA.V" is on the screen. STOP • When "STOP" or "-STOP" appears on the screen, see "STOP function cancellation"...

  • Page 44: Stroke Length Adjustment

    ■ Stroke length adjustment A stroke length can be adjusted when the moving distance of the plunger is changed by the stroke length adjusting knob. The stroke length adjustment range is 50-100% for the B type, 40-100% for C type. The relation between a flow rate* and a stroke length is shown as below. Fixed stroke rate Stroke length adjustment *The flow rate described on the nameplate is at 100%.

  • Page 45: Before A Long Period Of Stoppage (One Month Or More)

    Before a long period of stoppage (One month or more) Clean wet ends and the inside of tubing. • Run the pump with clean water for about 30 minutes to rinse chemicals off. Before unplugging the pump • Always stop the pump by key operation and wait for three seconds before unplugging the pump.

  • Page 46: Programming Flow

    Programming flow Power ON Calibration mode Manual mode 3 sec. Stroke rate setting EXT mode Manual operation Save Cancel MULT ANA. V Prime mode 1 sec. Flow rate display ANA.R ANA-V ANA-R programming routine programming routine Keypad lock ANA. V ANA.R Disp ANA.
  • Page 47 3 sec. User mode EXT mode programming EXT mode selection MULT See ANA-V programming routine See ANA-R programming routine 2 LOCK Operation programming...

  • Page 48: Manual Operation

    Manual operation Turn on power. The LED lights and a display related to the cur- rent mode appears on the screen. * The pump waits in the manual mode when turning STOP on power with a default setting or calls up a previ- ous mode at the last shutoff.

  • Page 49: Ext Operation

    Push the start/stop key. The pump starts to run. • The LED blinks at each shot. STOP STOP EXT operation The pump operation is controlled by the external (pulse) signal. ■ EXT mode Set the upper limit spm and enter EXT mode. Note that the pump starts to run in sync with the external signal as entering EXT mode.

  • Page 50: Ext Mode Programming

    Use the UP or DOWN key to program the upper limit. Push the start/stop key and stop the pump when it is running. Then program stroke rate. • A stroke rate increases/decreases as pushing the UP/DOWN keys. • Press and hold either key for three seconds for quick change. Quick change stops at 0.1 or 100%.
  • Page 51 Multiplier programming Program the number of shots per signal to control the pump. The number of shots can be programmed from 1 to 9999. NOTE Do not enter the external signal during programming. Enter EXT mode. Push the EXT key to move from manual mode to EXT mode. * Push the start/stop key and stop the pump when it is running.
  • Page 52 Push the EXT key and call up the multiplier programming screen. MULT STOP STOP Disp SET Use the UP or DOWN key to program a multiplier. • A multiplier increases/decreases as pushing the UP/DOWN keys. • Press and hold either key for three seconds for quick change. Quick change stops at 1 or 9999.
  • Page 53 Divisor programming Program the number of signals per shot to control the pump. The number of signals can be programmed from 1 to 9999. NOTE • If a divisor is programmed to 1 so as to make one shot per pulse and the input interval of the external signal is close to a manual operation stroke rate (but not exactly in synchronization), irregular operation may occur.
  • Page 54 Push the EXT key and call up the multiplier programming screen. STOP STOP Use the UP or DOWN key to program a divisor. • A divisor increases/decreases as pushing the UP/DOWN keys. • Press and hold either key for more than three seconds for quick change.
  • Page 55 ANA-V programming Select "ANA-V" or "ANA-R" in USER mode. See page 66. Enter EXT mode. Push the EXT key to move from manual mode to EXT mode. * Push the start/stop key and stop the pump when it is running. Then call up EXT mode.
  • Page 56 Push the Disp key and enter a stroke rate at P1. • A stroke rate increases/decreases as pushing the UP/DOWN keys. • Press and hold either key for three seconds for quick change. Quick change stops at 0 or 100%. 0 or 100% skips to 100 or 0% when the key is released and pushed once.
  • Page 57 Push the start/stop key to return to EXT mode. The pump starts to run in proportional control according to the ANA-V programming. ANA. V STOP STOP ANA-R programming Select "ANA-V" or "ANA-R" in USER mode. See page 66. Enter EXT mode. Push the EXT key to move from manual mode to EXT mode.
  • Page 58 Push the EXT key and select a preset program. ANA.R STOP STOP Scroll through the ANA-R programming routine by the UP and DOWN keys. Push the EXT key to return to the EXT mode selection. ANA.R STOP STOP Push the start/stop key to enter EXT mode. ANA.R STOP STOP...

  • Page 59: User Mode

    User mode The following features can be programmed. Get access to User mode via the wait state in the manual mode. • STOP function The pump stops running while receiving the external signal via the STOP terminal. • Pre-STOP function The STOP LED lights orange while the pump receiving the external signal via the Pre-STOP terminal.

  • Page 60: Stop/Pre-Stop Function

    ■ STOP/Pre-STOP function The start/stop of the pump operation can be controlled by the external stop signal. • When "NOR. OP" is selected... The pump stops while receiving the stop signal. • When "NOR. CL" is selected... The pump runs while receiving the stop signal. STOP/Pre-STOP function programming Return to the wait state in the manual mode.
  • Page 61 Select "STOP" or "P-STP". Scroll through the User mode selection by the UP and DOWN keys. Push the EXT key. STOP STOP Select "NOR. OP" or "NOR. CL". Push the start/stop key to return to manual mode. STOP STOP The screen indicates that the STOP function is active. Operation programming...

  • Page 62: Stop/Pre-Stop Function Cancellation

    ■ STOP/Pre-STOP function cancellation A stop state can be cancelled if the current selection is changed. Example) NOR.OP→NOR.CL NOR.CL→NOR.OP Call up "-STOP" screen. If the screen shows "STOP" in the manual or EXT mode, push the start/ stop key. STOP Press and hold the EXT key for three seconds to enter User mode.
  • Page 63 Push the EXT key and change the current selection. If "NOR.OP" is selected change it to "NOR.CL", and vice versa. STOP Push the start/stop key to return to manual mode. STOP STOP The STOP or Pre-STOP function now has been cancelled. Operation programming...

  • Page 64: Output Function

    ■ OUTPUT function • When "OUT"→"SPM" is selected... The pump sends the OUTPUT signal at each shot while running. • When "OUT"→"STOP" is selected... a. The pump sends the OUTPUT signal while receiving the STOP signal (with the setting of operation stop at STOP signal input). b.
  • Page 65 Push the EXT key. STOP STOP Select "STOP" or "SPM". Push the start/stop key to return to manual mode. STOP STOP The programming has now been reflected to the pump operation. Operation programming...

  • Page 66: Ana-V/-R Selection

    ■ ANA-V/-R selection • When "ANA-R" is selected... The preset proportional control programs of "4-20", "20-4", "0-20" and "20-0" are available. • When "ANA-V" is selected... A proportional control pattern can be newly programmed. NOTE A default setting is "ANA-R". Return to the wait state in the manual mode.
  • Page 67 Push the EXT key. STOP STOP Select "ANA-R" or "ANA-V". Push the start/stop key to return to manual mode. STOP STOP The programming has now been reflected to the pump operation. Operation programming...

  • Page 68: Buffer On/Off Selection

    ■ Buffer ON/OFF selection • When "bM-ON" is selected... Excessive external signals that are not reflected to the MULT or DIV opera- tion can be stored. • When "bM-OF" is selected... Excessive external signals are not stored. NOTE A default setting is "bM-OF". Return to the wait state in the manual mode.
  • Page 69 Push the EXT key. STOP STOP Select "bM-ON" or "bM-OF". Push the start/stop key to return to manual mode. STOP STOP The programming has now been reflected to the pump operation. *The pump can run up to 65535 shots by the stored excessive signals. Operation programming...

  • Page 70: Pin Number Entry

    ■ PIN number entry A PIN is required to release a keypad lock state. NOTE A default setting is "bM-OF". Return to the wait state in the manual mode. Push the start/stop key to return to the manual wait state if the pump is running in manual mode or in EXT mode.
  • Page 71 Push the EXT key. STOP STOP 2 LOCK Use the UP and DOWN keys to create PIN number. 2 LOCK 2 LOCK Shift to the next digit by pushing the DISP key. *A default PIN number is "00000". Push the start/stop key to return to manual mode. STOP 2 LOCK STOP...

  • Page 72: Keypad Lock

    Keypad lock Keypad lock can be active in the following states for the prevention of errone- ous key operation. Manual mode Wait state During operation STOP STOP EXT mode MULT STOP STOP ANA-R ANA- V STOP STOP NOTE • Any key operation is not acceptable when the keypad lock is active. In an emergency, unplug the pump or enter the external signal via the STOP terminal to stop operation.

  • Page 73: Keypad Lock Activation

    ■ Keypad lock activation Press and hold the start/stop key for more than three seconds. STOP STOP LOCK "LOCK" indication appears on the screen. ■ Keypad lock release Push the EXT key once. Enter the PIN number. STOP LOCK STOP LOCK Shift to the next digit by pushing the DISP key.

  • Page 74: Calibration Mode

    Calibration mode Entering a flow rate per shot, operation can be monitored in GPH, L/h or mL/m. Run the pump in an actual operating condition and measure the flow for one minute. Return to the wait state in the manual mode. Push the start/stop key to return to the manual wait state if the pump is running in manual mode or in EXT mode.

  • Page 75: Unit Change

    Enter the measured flow. Shift to the next digit by pushing the DISP key. *Pushing the EXT key, the programming is cancelled. Push the start stop key to return to the wait state. The programming is stored as "SAVE" indication appears on the screen. The maximum flow can be checked at each unit.

  • Page 76: Maintenance

    Maintenance This section describes troubleshooting, inspection, wear part replacement, exploded views and specifications. Important • Follow instructions in this manual for replacement of wear parts. Do not disassemble the pump beyond the extent of the instructions. • Always wear protective clothing such as an eye protection, chemical re- sistant gloves, a mask and a face shield during disassembly, assembly or maintenance work.

  • Page 77: Troubleshooting

    Troubleshooting First check the following points. If the following measures do not help remove problems, contact us or your nearest distributor. States Possible causes Solutions The pump Power voltage is too low. • Observe the allowable voltage does not range of 90-264VAC. run.
  • Page 78 States Possible causes Solutions Liquid leaks. Loose fit of the fitting or the air vent • Retighten them. body Loose fit of the pump head • Retighten the pump head. See page 37. O rings or valve gaskets are not •...

  • Page 79: Inspection

    Inspection Perform daily and periodic inspection to keep pump performance and safety. Daily inspection Check the following points. Upon sensing abnormality, stop operation immedi- ately and remove problems according to "Troubleshooting". When wear parts come to the life limit, replace them with new ones. Contact us or your nearest distributor for detail.

  • Page 80: Wear Part Replacement

    Wear part replacement To run the pump for a long period, wear parts need to be replaced periodically. It is recommended that the following parts are always stocked for immediate replacement. Contact us or your nearest distributor for detail. Precautions •...

  • Page 81: Before Replacement

    Before replacement First release pressure from the pump head. Stop the pump operation. Rotate the adjusting screw two revolutions anticlockwise to open the air vent port. NOTE Do not rotate it three revolutions or more. Otherwise, the adjusting screw may come off with solution spray.
  • Page 82 Loosen the fitting nut to remove a dis- Fitting nut charge tube and an air bleed tube. Air bleed tube Discharge tube Turn the lock nut anticlockwise by Air vent body A Lock nut an adjustable wrench and remove the air vent body A. Remove the air vent body B by the 21mm box wrench.

  • Page 83: Suction Valve Set Dismantlement/Assembly

    Air vent body B Place a new valve set into the pump head and screw the air vent body B through the lock nut. Lock nut * Be careful not to misarrange the valve set or place it upside down. Otherwise, leakage or flow rate reduc- tion may result.

  • Page 84: Spacer Set Replacement (Auto Degassing Type)

    Pull out the valve set by a pair of tweezers. Hand-tighten the fitting with the valve set in it into the pump head as far as it will go. Retight- Valve set en it by a further 1/4 turn with an adjustable wrench or a spanner.

  • Page 85: Air Vent Valve Set Replacement (Auto Degassing Type)

    ■ Air vent valve set replacement (Auto degassing type) Loosen the fitting nut and remove an air bleed tube. * Be careful not to get wet with a residual chemical. Loosen and remove the fitting. Take the air vent valve set out of the fitting Fitting nut adapter.
  • Page 86 Run the pump and set the stroke length to 0%. Then stop the pump. Loosen the fitting nuts and re- Fitting nut Air bleed tube move a suction tube, a discharge tube and an air bleed tube. For the auto degassing type, dis- connect another air bleed tube from Discharge tube the automatic air vent valve body as...
  • Page 87 NOTE • Fit the retainer to the diaphragm with its round edge Mating parts Bracket to the diaphragm. • Check that the bracket spacer is in place. Refit the bracket spacer into the bracket, combining mating parts as necessary. • The B/C-31 & -36 types do not have a bracket spacer.

  • Page 88: Exploded View

    Exploded view Pump head, Drive unit & Control unit The pump in the diagram below is completely dismantled. Do not dismantle the pump beyond the extent shown in this instruction manual. Air vent Automatic air vent type FC type Diaphragm spacer Valve set*...

  • Page 89: Pump Head

    Pump head ■ EWN-[B09•B11•B16•B21•C16•C21][VC•VH•PC•PH•TC] Part names # of parts Pump head Fitting Fitting nut Air vent body B Lock nut Diaphragm Retainer 10 Air vent body A 11 Valve guide 12 Valve seat 13 Valve 14 Valve gasket 17 O ring 18 Diaphragm spacer Hex.

  • Page 90: Ewn-[B31•C31•C36][Vc•Vh•Pc•Ph•Tc]

    ■ EWN-[B31•C31•C36][VC•VH•PC•PH•TC] Part names # of parts Pump head Fitting Fitting nut Air vent body B Lock nut Diaphragm Retainer 10 Air vent body A 11 Valve guide 12 Valve seat 13 Valve 14 Valve gasket 17 O ring 18 Diaphragm spacer Hex.

  • Page 91: Ewn Fc

    ■ EWN FC Part names # of parts Pump head Fitting Diaphragm Retainer 11 Valve guide 12 Valve seat 13 Valve 14 Valve gasket 17 Gasket 18 Diaphragm spacer Hex. socket head bolt [PW•SW] * The number of diaphragm spacers varies with pump model.

  • Page 92: Ewn C31Pc/P6-V

    ■ EWN-C31PC/P6-V Part names # of parts Pump head Fitting Fitting nut Diaphragm Retainer 11 Valve guide 12 Valve seat 13 Valve 14 Valve gasket 17 O ring Hex. socket head bolt [PW•SW] 28 Hose stopper 29 Fitting spacer 30 O ring 51 Inlet 52 Valve spring * The number of diaphragm spacers...

  • Page 93: Ewn Sh/Sh-H/Sh-H2

    ■ EWN SH/SH-H/SH-H2 Part names # of parts 1 Pump head 3 Fitting 7 Diaphragm 9 Retainer 11 Valve guide 12 Valve seat 13 Valve 14 Valve gasket B 18 Diaphragm spacer Hex. socket head bolt [PW•SW] 28 Valve gasket A 37 Adjusting screw 38 Seal nut 39 Seal ring...

  • Page 94: Ewn With An Automatic Air Vent

    ■ EWN with an Automatic air vent Part names # of parts 1 Pump head 2 Bracket 3 Fitting 4 Fitting nut 5 Air vent body B 6 Lock nut 7 Diaphragm 9 Retainer 10 Air vent body A 11 Valve guide 12 Valve seat 13 Valve 14 Valve gasket...

  • Page 95: Specifications/Outer Dimensions

    Specifications/Outer dimensions Specifications Information in this section is subject to change without notice. ■ Pump unit VC•VH•PC•PH Flow rate Discharge Stroke length Stroke rate Current Power con- Weight Model code pressure sumption value (mℓ/min) (mm) (spm) EWN-B11 (38) EWN-B16 (65) 50-100 (0.5-1.0) EWN-B21...
  • Page 96 VC•VH (High compression type) Flow rate Discharge Stroke length Stroke rate Current Power con- Weight Model code pressure sumption value (mℓ/min) (mm) (spm) EWN-B09 (12) EWN-B11 (23) 50-100 (0.625-1.25) EWN-B16 (40) 0.1-100 (1-180) EWN-B21 (63) EWN-C16 (54) 40-100 (0.6-1.50) EWN-C21 (78) PC•PH•SH (High pressure type) Flow rate...

  • Page 97: Power Cable

    * These specifications were collected at the time of our shipping inspection and based on pumping clean water at ambient temperature and rated voltage. * Flow rates were collected at the maximum discharge pressure, 100% stroke length and 100% stroke rate. A flow rate increases as a discharge pressure decreases. * Allowable room temperature: 0-40°C * Allowable liquid temperature: 0-40°C (0-60°C for the PC•PH•FC) * Allowable power voltage deviation: ±10% of the rated range...

  • Page 98: Outer Dimensions

    Outer dimensions ■ EWN-[B11•B16•B21] [VC•VH•PC•PH] (265) (47) LOCK (68) (23) ■ EWN-B31[VC•VH•PC•PH] (267) (48) LOCK (68) (125) (25) 98 Specifications/Outer dimensions...
  • Page 99 ■ EWN-[C16•C21] [VC•VH•PC•PH] (265) (47) LOCK (68) (23) ■ EWN-C31 [VC•VH•PC•PH] (267) (48) LOCK (68) (125) (25) Specifications/Outer dimensions...
  • Page 100 ■ EWN-C36 [VC•VH•PC•PH] (267) (48) LOCK (68) (24) ■ EWN-[B11•B16•B21]FC (231) (13) (68) (23) 100 Specifications/Outer dimensions...
  • Page 101 ■ EWN-B31FC (236) (16) (68) (25) ■ EWN-[C16•C21]FC (231) (13) (68) (23) Specifications/Outer dimensions...
  • Page 102 ■ EWN-C31FC (236) (16) (68) (25) ■ EWN-C36FC (235) (16) (68) (24) Specifications/Outer dimensions...
  • Page 103 ■ EWN-[B11•B16•B21]TC (265) (47) LOCK (68) (23) ■ EWN-B31TC (267) (48) LOCK (68) (25) Specifications/Outer dimensions...
  • Page 104 ■ EWN-[C16•C21]TC (265) (47) LOCK (68) (23) ■ EWN-C31TC (267) (48) LOCK (68) (25) Specifications/Outer dimensions...
  • Page 105 ■ EWN-C36TC (268) (49) LOCK (68) (24) ■ EWN-[B11•B16•B21]SH (232) (15) (68) (22) Specifications/Outer dimensions...
  • Page 106 ■ EWN-B31SH (233) (15) (68) (23) ■ EWN-[C16•C21]SH (232) (15) (68) (22) Specifications/Outer dimensions...
  • Page 107 ■ EWN-C31SH (233) (15) (68) (23) ■ EWN-C36SH (233) (15) (68) (23) Specifications/Outer dimensions...
  • Page 108 ■ EWN-[B09•B11•B16•B21] [VC•VH] (High compression type) (265) (47) LOCK (68) (23) ■ EWN-[C16•C21] [VC•VH] (High compression type) (265) (47) LOCK (68) (23) Specifications/Outer dimensions...
  • Page 109 ■ EWN-B11 [PC•PH] (High pressure type/High pressure type (2MPa)) (279) (62) LOCK (68) (23) ■ EWN-C16 [PC•PH] (High pressure type) (279) (62) LOCK (68) (23) Specifications/Outer dimensions...
  • Page 110 ■ EWN-B11SH (High pressure type/High pressure type (2MPa)) (232) (15) (68) (22) ■ EWN-C16SH (High pressure type) (232) (15) (68) (22) Specifications/Outer dimensions...
  • Page 111 ■ EWN-C31 [PC•P6] (High viscosity type) (238) (20) (68) (23) ■ EWN- [B11•B16] (Auto degassing type) (265) (47) AIR(AUTO) LOCK (68) (23) Specifications/Outer dimensions...
  • Page 112 ■ EWN- [C16•C21] (Auto degassing type) (265) (47) AIR(AUTO) LOCK (68) (23) Specifications/Outer dimensions...
  • Page 113 Specifications/Outer dimensions...
  • Page 116 TEL : (47)23 38 49 00 FAX : 23 38 49 01 China IWAKI Pumps (Guandong) Co., Ltd. TEL : (86)750 3866228 FAX : 750 3866278 Singapore IWAKI Singapore Pte. Ltd. TEL : (65)6316 2028 FAX : 6316 3221 China GFTZ IWAKI Engineering &...

This manual is also suitable for:

Ewn-c16 vcEwn-b11 vcEwn-b21 vcEwn-b16 vcEwn-c21 vcEwn-c31 vc ... Show all

Table of Contents