High-Purity Metering Pumps

Manual and Stepper-Controlled Dispense Pumps

Electronic Metering Pumps

PEM050 electronic stepper pumps accurately dispense 1-50 ml of corrosive media in PTFE fluid paths for chemical replenishing, blending, dosing, and spiking applications. These reliable pumps feature fully-supported rolling diaphragms, which maximize discharge pressure capabilities. Positive control valves ensure accuracy by eliminating the variability that is typical of check valves. They offer up to 5 discharge ports that can be independently controlled with programmable system logic.

  • Electronically controlled adjustable stroke
  • Dispense volume up to 50 ml
  • Highly accurate; ± 0.01% repeatability
  • 60 – 80 psi capability
  • Programmable system logic
  • 2 to 6 port configurable
PEM050 Specification Sheet

Pneumatic Pumps

PPM100 pneumatic metering pumps accurately dispense up to 100 ml of high-purity chemical in a PTFE fluid path. It operates with a fully supported rolling diaphragm to maximize discharge pressure capabilities. Two positive control valves ensure accuracy by eliminating variability that is typical of check valves.

  • Manually controlled adjustable stroke
  • Dispense volume up to 100ml
  • Highly accurate; ± 0.1% repeatability
  • 60 – 85 psi capability
PPM100 Specification Sheet

Owner's Manuals

PEM050 Owner’s ManualPPM100 Owner’s Manual

Exploded Views

PEM050 Exploded ViewsPPM100 Exploded Views

CAD Models

PPM100 CAD Models

Ordering Instructions

PEM050 Ordering InstructionsPPM100 Ordering Instructions
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White Knight Ultra-Pure PTFE and PFA Pump Materials
Fluid Temperatures to 100 Degrees Celsius (212 Degrees Fahrenheit)
White Knight One-Year 500,000 Cycles Warranty
CE Certification Mark

PEM Operation


White Knight metering pumps offer adjustable flow rates for use in single-wafer processing tools or premix vessels to ensure exact chemistry mixtures, and allow for in-situ mixing directly at the head. The pumps accurately dispense high-purity chemicals for replenishing, blending, dosing and spiking applications, as well as cleaning CVD equipment and in photolithography. They are ideal for photoresist, etch and clean processes, peroxide spiking in piranha mixtures, and other blending of chemical mixtures into process tanks prior to the introduction of substrates.

Features & Benefits

  • Fully adjustable stroke speed
  • Safe, leak-free operation with no maintenance
  • No exposed metalics prevents corrosion and contamination
  • PTFE fully-swept fluid path for ultra-pure applications
  • PTFE rolling diaphragm with PP housing
  • Visual position reference for easy setup and monitoring
  • Easy to install and service with snap-in/out mount
  • Can be installed in any orientation
  • Clean room assembly, testing and packaging
  • Leak detection port
  • Self-priming
  • Compact footprint
  • Minimal hold-up volume
  • Positive inlet/outlet valving prevents flow through


Dispense Range
1 - 50 ml per stroke
10 - 100 ml per stroke
Dispense Repeatability
± 0.01% (Full Scale)
± 0.1% (Full Scale)
Cycles Per Minute
up to 6 CPM
up to 12 CPM
Air Consumption
SCF per Cycle
1-3 SCFM
0.038-0.048 SCFM
Fluid Path Materials
Valve Actuation
Air Pressure
4.14 - 5.52 Bar
(60 - 80 psi)
4.14 - 5.86 Bar
(60 - 85 psi)
Max Discharge Pressure
3.8 Bar
(55 psi)
5.86 Bar
(85 psi)
Temperature Capability
up to 100°C
up to 100°C
2.95 kg
(6.5 lb)
1.6 kg
(3.5 lb)
Suction Lift*
4.6 m
(15 ft)
4.6 m
(15 ft)
Serial, Ethernet, or Digital (0-5 V, 0-10 V, 4-20 mA)
Leak Detection Options
Valve Position Sensing
Valve Position Sensing

*Suction lift diminishes over time. Recommended installation level less than 4.6 m (15 ft) above source. Optimized parameters can improve repeatability (up to ± 0.01%). Minimize suction lift to maximize repeatability. Tests conducted with water at ambient temperature. Dispense range measured at full stroke with maximum and minimum supply pressures at 80 psi and 60 psi. Contact White Knight for details.


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Download PEM050 Dimensions (PDF)
Download PPM100 Dimensions (PDF)

PEM Configuration

PPM Configuration

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