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Walchem EW-F series Instruction Manual

Electronic metering pump
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W A L C H E M
IWAKI America Inc.
EW-F & EK Series Metering Pumps
EW-F & EK Series
Electronic Metering Pump
Instruction Manual
Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA
TEL: 508-429-1110 FAX: 508-429-7433 WEB: www.walchem.com

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  • Page 1 W A L C H E M IWAKI America Inc. EW-F & EK Series Metering Pumps EW-F & EK Series Electronic Metering Pump Instruction Manual Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA TEL: 508-429-1110 FAX: 508-429-7433 WEB: www.walchem.com...
  • Page 2 WALCHEM and for the purposes disclosed in writing at the time purchased, if any. WALCHEM’s liability under this warranty shall be limited to replacement or repair, F.O.B. Holliston, MA U.S.A. of any defective equipment or part which, having been returned to WALCHEM, transportation charges prepaid, has been inspected and determined by WALCHEM to be defective.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Thank you for choosing a Walchem E-Class metering pump. This instruction manual deals with the correct installation, operation, maintenance and troubleshooting procedures for the EW and EK model metering pumps. Please read through it carefully to ensure the optimum performance, safety and service of your pump.

  • Page 4: Introduction

    All tubing must be securely attached to the fittings prior to starting the pump (see Section 2.3). Only use Walchem tubing with your pump. Tubing should be shielded to prevent possible injury in case of rupture or damage. UV resistant tubing should be used if the tubing is exposed to UV light.

  • Page 5: Model Code

    Model Code Pump Series IP 65 electronic metering pump with external pulse control or manual speed control (adjustable to 360 strokes per minute) and manually adjustable stroke length. (Turndown ratio 1800:1.) IP 67 aggressive environment rated electronic metering pump with external pulse control or manual speed control (adjustable to 360 strokes per minute) and manually adjustable stroke length.

  • Page 6: Specifications

    Specifications Electrical 50/60 Hz, single phase EWB/EKB 115 VAC±10% 0.8 Amp max. 20 watt avg. 230 VAC±10% 0.4 Amp max. 20 watt avg. EWC/EKC 115 VAC±10% 1.2 Amp max. 22 watt avg. 230 VAC±10% 0.6 Amp max. 22 watt avg. Operating Conditions Ambient temperature 32°F to 122°F (0°C to 50°C)

  • Page 7: Dimensions

    Dimensions EW-11,16 and 21 Models with thermoplastic liquid end materials (See Note 1) (3.02”) (10.02”) (See Note 1) (1.46”) TUBING (ID X OD) ø1/4” x ø3/8” TUBING (ID X OD) ø1/4” x ø3/8” TUBING (ID X OD) ø1/4” x ø3/8” 4.92”...
  • Page 8 EW-SH Models (EWB11,21/C21 shown below. See notes for changes in dimensions with other sizes) (9.15”) (3.02”) (0.59”) NPT 1/4” ø4 NPT 1/4” (2.65”) 4.92” (0.85”) (See Note 3) (See Note 2) Notes: All dimensions in inches. (0.91”) for EWC31 and 36 sizes. (1.34”) for EWC31 and (1.24”) for EWC36.
  • Page 9 EK-11,16 ands 21 Models with thermoplastic liquid end materials (SEE NOTE 1) 10.14" 1.46" (SEE NOTE 1) ø1/4" x ø3/8" ø1/4" x ø3/8" ø1/4" x ø3/8" 5.71" 0.91" 7.78" Notes: 1. Addition of a Multifunction valve increases overall length by 0.37”. Addition of an Auto Air Vent Valve increases overall length by 1.59”...

  • Page 10: Installation

    INSTALLATION Unpacking Open the shipping carton and inspect contents for damage. If any items are missing or damaged contact your local distributor. Pumps are pre-primed with water at the factory. If the application is not compatible with water, drain and dry before use. Be sure to remove caps from fittings before attaching tubing. CAUTION: Head bolts may have loosened during storage or shipment.

  • Page 11: Supply Tubing

    Injection Coupling Nut Valve (Air Vent Point of Injection Return Coupling PVC Pipe Tubing Air Gap (user Coupling Foot Figure 4 Connecting Tubing Supply Tubing The supply tubing run should be as short as possible. For flooded suction mounting, install a shut-off valve with an appropriate tubing connector at the tank outlet.

  • Page 12: Discharge Tubing

    WARNING: If there is any leakage around the coupling nut and it appears to have been installed correctly, DO NOT TIGHTEN the coupling further! Release pressure in the line, disconnect tubing, re-cut and re-connect. Tightening of misinstalled tubing may cause the tubing to pop off under pressure.

  • Page 13: Installing Injection/Backpressure Valve

    Additionally, the valve does NOT act as an anti-siphon valve. If siphoning is a possibility, or if pumping downhill into open atmosphere (open tank), a Walchem MultiFunction valve or a separate back pressure/anti-siphon valve must be installed.

  • Page 14: Operation

    OPERATION Pump Operation & Programming The EW an EK pumps have a digital display, two LED indicators and three pushbutton keys to change the pump speed and programming. DISPLAY Operating condition and programming is displayed STOP/START Key UP Key Manually stops and starts the Increases numeric values.
  • Page 15 3 6 0 Initial Increases Stroke Rate Power Up WAIT MODE Decreases Stroke Rate Increases Stroke Rate 3 5 2 Decreases Stroke Rate Stop/Start MANUAL RUN MODE Goes back to WAIT Mode Holding the UP and DOWN together in EXT mode will override external and manually run the pump at 360 SPM (priming).

  • Page 16: External Inputs & Outputs

    C. Pump Operation Manual and On/Off Control The pumps can be operated manually by pressing the stop/start key from the wait mode. Once pressed, the pump will begin to operate at the stroke rate shown on the display. From here, the up and down keys can be used to change the stroke rate, and the stroke length knob can be adjusted down to further reduce the pump output.
  • Page 17 External Control The external pulse input should not exceed 360 pulses per minute (6Hz) and the pump will output one stroke for every input pulse. The control signal can be a contact closure type switch (reed) with a max load of 1mA or a solid state device.
  • Page 18 Voltage type Input Connector 1 Voltage Input Type Outputs (Non-Contact Closure) Power PIN 1 will take a voltage in from an external source (max 24VDC). When this external voltage is present, then both Sync Pulse relays will independently switch the input voltage. Both Input outputs can be used simultaneously.

  • Page 19: Adjustment

    Stop/Start Control An external Stop/Start signal will turn the STOP LED to red and also Connector control the pump. In this mode, AC power is applied continuously, but the pump operation is stopped (or started – see section on programming) by completing the circuit between Terminal 5 and Terminal 6.

  • Page 20: Multifunction Valve Operation

    MultiFunction Valve Operation The MultiFunction Valve is optional on select E-Class pumps and replaces the standard Manual Air Vent Valve when ordered. It integrates the air venting/bleeding functions with a back pressure and anti-siphon valve. Pressure release Air Vent / Bleed Function knob 1.

  • Page 21: Auto Air Vent Valve Operation

    Auto Air Vent Valve Operation The Auto Air Vent Valve is an option on select EW and EK pumps and replaces the standard Manual Air Vent Valve when ordered. It is used primarily in applications where gassing is a problem and pumps can lose prime. Unlike the Manual Air Vent Valve, the Auto Air Vent Valve constantly bleeds a controlled amount of volume out of the “Air”...

  • Page 22: Calibration

    Calibration If exact output calibration is required, first prime and adjust the pump as above. Then connect a calibration column to the suction side of the pump. Turn the pump on for one minute and read the amount of liquid pumped from the column. Adjust the frequency up or down as necessary and check the output again.

  • Page 23: Maintenance

    MAINTENANCE CAUTION: Before working on the pump, disconnect the power cord, depressurize the discharge tubing and drain or flush any residual liquid from the pump head and valves. Always wear protective gear when working around chemicals. Diaphragm Replacement Disconnect AC power to the pump and disconnect the suction tubing, discharge tubing, and air vent tubing.

  • Page 24: Exploded View & Parts Guide

    EXPLODED VIEW & PARTS GUIDE PVC/GFRPP Liquid End Exploded View #1 For EW and EK pump model sizes 11, 16, and 21 Manual Air Vent Valve (Standard) Auto Air Vent Valve (Optional) Entire Head Assembly Valve Cartridge Air Vent Valve Part Numbers for these assemblies are on Page 30.
  • Page 25 PVC/GFRPP Liquid End Exploded View #1 Components Item Part No Description Size Liquid End Material EH2015 Head, Pump, EW/EKB11, PVC VC, VE, VF, VCA EH2017 Head, Pump, EW/EKB11, GFRPP PC, PE EH1950 Head, Pump, EW/EK/EZ16, PVC VC, VE, VF, VCA EH1957 Head, Pump, EW/EK/EZ16, GFRPP PC, PE...
  • Page 26 PVC/GFRPP Liquid End Exploded View #2 For EW and EK pump model sizes 31 and 36 Entire Head Assembly Valve Cartridge Air Vent Valve Part Numbers for these assemblies are on Page 30.
  • Page 27 PVC/GFRPP Liquid End Exploded View #2 Components Item Part No Description Size Liquid End Material EH1961 Head, Pump, EW/EK31, GFRPP PC, PE EH1960 Head, Pump, EW/EK31, PVC VC, VE, VF EH1962 Head, Pump, EW/EK36, GFRPP PC, PE EH1953 Head, Pump, EW/EK36, PVC VC, VE, VF EH0405 Housing, Valve, 1/2 PVC...
  • Page 28 PVDF Liquid End Exploded View #3 For all PVDF EW and EK Pump Models TC Only TC Only FC Only 31 and 36 11, 16, and 21 All sizes 14 (FC only) Entire Head Assembly Valve Cartridge Air Vent Valve 14 (FC only) Part numbers for these assemblies are on Page 30...
  • Page 29 PVDF Liquid End Exploded View #3 Components Item Part No Description Size Liquid End Material EH2019 Head, Pump, EW/EKB11, PVDF FC, TC EH1970 Head, Pump, EW/EK16, PVDF FC, TC EH1965 Head, Pump, EW/EK21, PVDF FC, TC EH1966 Head, Pump, EW/EK31, PVDF FC, TC EH1967 Head, Pump, EW/EK36, PVDF...
  • Page 30 Stainless Steel Liquid End Exploded View #4 For all EW and EK Pump Models Components Item Part No Description EH2021 Head, Pump, EW/EKB11, 316 SS EH2022 Head, Pump, EW/EK21, 316 SS EH2023 Head, Pump, EW/EK31, 316 SS EH2024 Head, Pump, EW/EKC36, 316 SS EH0429 Housing, Valve, 0.188 &...
  • Page 31 Accessories (Not Shown) Part No. Description Size Liquid End Material E90494 Connector Assy, Stop Input, 4-pin-R EW/EW-Y E90495 Connector Assy, Ana/Dig Input, 5-pin EW/EW-Y E90496 Connector Assy, PosiFlow Input, 5-pin-R EW/EW-Y E90497 Connector Assy, Outputs, 4-pin-SQ EW/EW-Y E90665 Connector Assy, EK pump, Input E90001 Valve, Injection 3/8 11, 16, 21...
  • Page 32 (Inside) (Not shown in this view) (Not shown in this view) A Drive Unit B Control Module C Head Assembly D Valve Cartridge E Air Vent Assembly...
  • Page 33 Pump Head Assembly *  Drive Control Model (Spare Parts Kit)   Unit Module EWB11F1- WB11-1 EWBF1 X11PC X11PE X11VC X11VE X11VF X11TC X11FC (X11PC-PK) (X11PE-PK) (X11VC-PK) (X11VE-PK) (X11VF-PK) (X11TC-PK) (X11FC-PK) EWB11F2- WB11-2 EWBF2 EWB16F1- WB16-1 EWBF1 X16PC X16PE X16VC X16VE X16VF...
  • Page 34 Drive and Control Module Exploded View A Drive Unit B Control Module Part numbers for these assemblies are on Page 30 Item Part No. Description Series EH1580 Screw, M5 x 55, SS PFH, Black EH1581 Screw, M5 x 47, SS PFH, Black EH1653 Hinge Pin, Spring, EW-F/Y Cover EH1646...

  • Page 35: Troubleshooting

    Torque: 19 lb-in (2.16 N-m) Diaphragm is damaged Replace diaphragm O-ring or valve gasket missing Install o-ring or valve gasket SERVICE POLICY The EW and EK Series electronic metering pumps have a 2-year limited warranty. Contact your Walchem distributor for service.

This manual is also suitable for:

Ek seriesEw series

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