Walchem Pumps & accessories

Walchem pumps for metering offer a pump for most applications. Featuring four great Walchem pump series, EZ, EW, EK and EHE, E-Class metering pumps are powered by advanced microprocessor-based electronics and superior mechanical design. With capacities up to 20 GPH (76 l/h) and pressures up to 250 PSI (17 bar) E-Class has a pump that will fit most any industrial, municipal, or agricultural water or wastewater application. The Walchem pumps entire E-Class pump line is backed with a comprehensive 2-year warranty that covers the entire pump, including the liquid end and diaphragm.. Walchem pumps not only offer high quality pumps but at an economical price. If PFC does not have the pump in stock the general lead time for Walchem pumps is 2 weeks.


Walchem Pump EWN Series

Walchem EWN Specs

  • walchem EWNR pumpHigh Speed Performance
    E-Series pumps operate up to 360 strokes-per-minute with adjustments in 1 spm increments, providing high resolution chemical feed. Adjustable stroke length further increases the ability to refine output, making the E-Series pne of the most versatile solenoid metering pumps on the market.
  • Engineered Longevity
    All E-Series pumps feature dual bearing support. The armature and shaft are supported with a bearing on each end, which ensures proper axial movement, enabling the E-Series to operate at 360 SPM while extending the life of the diaphragm.
  • Superior Check Valve Performance
    Dual Check Valve Assemblies in both suction and discharge fittings feature precision ball guides and tapered seats. Precise machining and molding of parts limit valve ball travel, ensuring that balls fully seat and seal with every stroke. This superior check valve design guarantees fast priming and reliable performance.
  • Flexible Connections
    A removable tubing insert provides flexibility of tubing sizes and eliminates twisting of the tubing during connection. A threaded insert can be used in place of the tubing adapter to easily convert any connection to NPT.
  • High Compression Ratio
    The compression ratio of a metering pump is important because it affects the pump’s ability to prime and vent. The compression ratio is raised when you reduce the dead volume of the pump head during operation. All
    E-Series pumps feature a very high compression ratio that ensures proper feed especially with off-gassing
    products (i.e. Sodium Hypochlorite).

Walchem Pump EJ Series

Walchem EJ Specs

  • walchem EJ_VC pumpHigh Speed Performance
    The EJ Series operate at 360 strokes-per-minute, providing high resolution chemical feed and high turndown capability. Most competitive products operate at slower speeds, resulting in slug feeding, accelerated diaphragm wear and poor feed control.
  • Universal Voltage
    The Universal Voltage Function enables the EJ Series to operate at any AC voltage. The EJ Series also conform to global Standards.
  • External Control
    The EJ Series have both digital input and Stop/Start inputs built into the pump, enabling either proportional or On/Off control.
  • IP65 Equivalent Protection
    A robust housing protects the pump from normal wear. Mounting the Digital Display and Key Pad control within the drive housing creates a highly water resistant design. A clear cover further protects the pump from liquids.

Walchem Pump EZ Series

Walchem EZ Specs

  • walchem EZ with certsOutputs to 6.3 GPH and pressure capabilities to 150 PSI.

  • Simple to operate microprocessor control with a turndown ratio of 360:1
  • EZ-Timer module for timed feed control
    • Can be programmed in daily or weekly cycles.
    • Weekly schedules can be programmed in either 1 or 2-week cycles with a daily on-time.
    • Daily timer can be set for multiple daily on-times.
  • Dual bearing support ensures proper axial movement extending the life of the diaphragm.
  • Dual check valve assemblies in both suction and discharge fittings guarantees fast priming and reliable performance

Walchem Pump EK Series

Walchem EK Specs

walchem EK with certs

  • World’s first and only IP67 rated electronic metering pump – guaranteed to operate submerged 3 feet under water for up to 30 minutes!
  • Outputs to 6.7 GPH (25.2 LPH) and pressure up to 150 PSI (10 bar)
  • High speed performance at 360 SPM provides high resolution chemical feed.
  • Dual bearing support ensures proper axial movement extending the life of the diaphragm.
  • Dual check valve assemblies in both suction and discharge fittings guarantees fast priming and reliable perfomance
  • High compression ratio ensures proper feed

Walchem Pump EH-HV High Viscosity Series

 Walchem EHHV Specs walchem HV_with certs

  • Specifically designed to accurately feed high viscosity chemicals.

  • Available in two feed ranges from 2.3 GPH to 4 GPH and pressures up to 73 PSI.

  • Up to 240 strokes per minute results in high resolution chemical feed, reduced pulsation and improved mixing

  • Stainless Steel or Hastelloy C276 springs help quickly close the valve balls against the PCTFE seats, increasing the valve action with high viscosity polymers.
  • Liquid end, drive and electronics are modular, enabling economical repair or replacement of parts. The control module can easily be mounted in a remote location
  • PTFE laminate over EPDM is molded onto a solid core. A retainer plate is engineered to minimize flow rate changes as pressure varies.

Walchem Pump EWN-Y Series

Walchem EWN-Y Specs

walchem EWNY_EFS_with Certs

  • The EWN-Y electromagnetic pump combined with EFS flow sensor provides accurate real-time control and display of dosing rate.

  • Set point control allows the desired flow rate to be simply programmed into the pump.

  • The EFS is mounted directly on the pump for accurate dosing rate measurement – ALL WITHOUT ANY TIME-CONSUMING CALIBRATION.

  • The EWN-Y provides a clear display of actual dosing rate and a 4-20 mA output signal proportional to the flow rate.

  • An optional Auto Air Vent Valve (NAE) can be mounted in-line with the EFS sensor to eliminate gas-lock conditions quickly with continuous venting.

  • Operating history such as total flow return and power-on time are stored in memory and can be used for diagnostic troubleshooting.

Walchem Pump EHE Series

Walchem Pump EHE Specs

walchem EHE_with certs

  • Outputs up to 20 GPH (75 LPH) and pressure up to 150 PSI (10 bar)
  • High speed performance at 360 SPM provides high resolution chemical feed.
  • Dual bearing support ensures proper axial movement to extend the life of the diaphragm
  • Dual check valve assemblies in both suction and discharge fittings guarantees fast priming and reliable perfomance
  • High compression ratio ensures proper feed
  • Microprocessor – based control circuitry
    • Operator adjustment of pump speed and external input settings
    • Pump can be set to divide (accumulate) pulses by a factor of 1 to 999
    • Programmable 4-20 mA input

Walchem Pump LK Series

Walchem LK Specs

walchem LKPump1_2

  • Maximum capacity of 114 GPH (432 l/h) and maximum pressure of 225 PSI (1.5 MPa).
  • Ideal for chemical feed applications in a wide range of fields, including water treatment, chemical process, agriculture, mining and paper.
  • Accurate and reliable stroke setting with a micrometer dial of the spring back stroke adjustment mechanism.
    • Lockable mechanism is adjustable from 10 to 100%.
  • Dual-cam drive with a built-in worm gear type speed reducer.
    • Provides maximum wear resistance in continuous operation over long periods of time.
  • All of the standard models employ totally enclosed fan-cooled motors which are vertically mounted to save space.
    • A variety of motor options are available, including explosion- proof, and DC variable speed motors for external control by a 4-20 mA input signal.

Walchem Pump Large LK Series

Walchem LK Brochure

The Iwaki LK Series metering pumps are motor-driven, mechanically-actuated diaphragm metering pumps. This largerLK Series can achieve outputswalchem pumps up to 856 GPH (3240 l/h) and maximum pressures of 220 PSI (1.5 MPa). The LK Series is ideal for chemical feed applications in a wide range of fields, including water treatment, chemical process, agriculture, mining and paper.

  • High Performance & Versatile Design – The LK series has a discharge accuracy (repeatability) that is within ±2% FS. Reliability has been enhanced with the improvement in the linearity of the stroke and the discharge ratio of each stroke.
  • Drive- The heart of the LK is the dual-cam drive with a built-in worm gear type speed reducer. This compact & rigid mechanism, provides maximum wear resistance in continuous operation over long periods of time.
  • The LK-A, LK-B, and LK-C series pump are designed to be fit with IEC general-purpose, vertically mounted TEFC outdoor-use motors, providing different voltage and enclosure options, including VFD-ready and explosion-proof designs.

Walchem Pump IX Series

Walchem IX Specs

walchem IX-Low-res

  • Motor control adjusts the discharge and suction speeds to meet a full and accurate turndown ratio of 750:1 (300 L/h to 200 mL/h)
  • Maintains accurate flow rates allowing a low cost, mechanically-driven diaphragm pump to achieve a high accuracy of ±1%.
  • Helical gears and return springs reduce power consumption by up to 70% compared to conventional motor-driven mechanical diaphragm metering pumps.
  • Fixed stroke length maintains a high compression ratio in each stroke resulting in fast priming and no air-lock at any flow rate.
  • Controller position can be ordered in 6 positions for operator convenience and ease of use after installation.

Walchem Pump HRP Series

Walchem HRP Specs

walchem HRP_Pumps

  • Designed specifically for OEM applications, the HRP pump has been sized for easy integration into many types of systems.
  • High Resolution/Ultra compact 4″ x 2.5″ x 3.5″
  • Digitally controlled stroke rate 0 to 720 SPM
  • IP65 waterproof and dustproof design
  • DC voltage operation
  • PVDF pump head with ceramic balls and FKM elastomer
  • 4 types of control:
    • Pulse
    • 4-20 mA
    • 1-5 VDC
    • Start/Stop