White Knight PX Series Pumps

Durable, PTFE and PFA Pumps For High-Purity Chemicals

PX/PLX Series pumps were discontinued Dec 31, 2015. Please upgrade to PXA Series pumps for better performance, improved reliability, extended pump life and shorter lead times. See comparisons below. PX/PLX Series pumps will be supported for five years after discontinuation.

White Knight PX Series Pumps for Semiconductor


PX Series pumps distribute chemicals through PTFE and PFA fluid paths. They are capable of up to 100°C (212°F) and offer air supply pressures up to 7 Bar (100 psi). The pumps operate with a solenoid valve and proximity switches, running continuously throughout their two-year warranty. The pumps are available in three models, PX30, PX60, and PX120, which are capable of maximum flow rates of 30, 60 and 120 lpm, respectively.

While White Knight continues to offer and support PX Series pumps, we recommend users consider PXA Series pumps, which provide better performance, increased flow rates, higher pressure capabilities, improved reliability, extended pump life and warranty periods, as well as shorter lead times. See comparisons below.

Features & Benefits

  • PTFE and PFA liquid path
  • Leak-proof, machined design
  • No elastomer O-rings, no leaks, never retorque
  • No lubrication in shift mechanisms
  • No electric motors, which generate heat
  • Various liquid connection options
  • Easily replaces competitive products using proximity sensors
  • Safe, leak-free operation due to no-metal design
  • Polypropylene heads, stainless steel proximity targets
  • Minimal parts for durable design
  • Class 100 cleanroom assembly, testing, and packaging
  • Easy to install and service
  • Proven reliable to 400, 300, or 200 million+ cycles for the PX30, PX60, PX120, respectively
  • No preventative maintenance during two-year warranty
White Knight Two-Year Warranty
White Knight Ultra-Pure PTFE and PFA Pump Materials
Chemical Delivery 7 Bar (100 psi) Pressures
Fluid Temperatures to 100 Degrees Celsius (212 Degrees Fahrenheit)
White Knight Proximity Switch Shift Method


PX Series pumps operate with proximity switches and solenoid valve that optimize stroke timing by shifting the bellows quickly and efficiently to increase durability.

Proximity Sensor-Controlled Pump Operations Diagram

Need shuttle valve or fiber optic sensors?

PSA Series pumps are controlled by shuttle valves.
PFA Series pumps are controlled with fiber optic sensors.

Supply Air

Exhaust Air

Ambient Air

Shift Signal

Liquid Suction

Liquid Discharge

Temperature Limits

White Knight PX Series Pumps Temperature Limitations
White Knight PXA Series Pumps Temperature Limitations

Performance & Dimensions

PX30 Performance

White Knight PX30 Pump Performance Curves

Click image to enlarge.

PX30 Dimensions

White Knight PX30 Pump Dimensions
Download PX30 Dimensions (PDF)

PX60 Performance

White Knight PX60 Pump Performance Curves

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PX60 Dimensions

White Knight PX60 Pump Dimensions
Download PX60 Dimensions (PDF)

PX120 Performance

White Knight PX120 Pump Performance Curves

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PX120 Dimensions

White Knight PX120 Pump Dimensions
Download PX120 Dimensions (PDF)

PXA030 Performance

White Knight PXA030 Pump Performance Curves

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PXA030 Dimensions

White Knight PXA030 Pump Dimensions
Download PXA030 Dimensions (PDF)

PXA060 Performance

White Knight PXA060 Pump Performance Curves

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PXA060 Dimensions

White Knight PXA060 Pump Dimensions
Download PXA060 Dimensions (PDF)

PXA140 Performance

White Knight PXA140 Pump Performance Curves

Click image to enlarge.

PXA140 Dimensions

White Knight PXA140 Pump Dimensions
Download PXA140 Dimensions (PDF)

Compare Maximum Flowrates

PX30 up to 30 LPM (7 GPM)
PXA030 up to 30 LPM (7 GPM)
PX60 up to 60 LPM (15 GPM)
PXA060 up to 60 LPM (15 GPM)
PX120 up to 120 LPM (30 GPM)
PXA140 up to 140 LPM (35 GPM)
PXA Series Pumps


Max Flow Rate*
30 lpm
7 gpm
60 lpm
15 gpm
120 lpm
35 gpm
25.6 lpm
6.76 gpm
68.1 lpm
17.99 gpm
147.6 lpm
38.99 gpm
Size of Air Connection
1/8 or 1/4 in FNPT
1/4 or 3/8 in FNPT
1/4 or 3/8 in FNPT
1/4 in FNPT
1/4 in FNPT
3/8 in FNPT
Displacement Per Cycle*
0.090 liters
0.024 gal
0.190 liters
0.050 gal
0.715 liters
0.189 gal
0.077 liters
0.020 gal
0.649 liters
0.050 gal
0.500 liters
0.132 gal
Cycles Per Minute*
≤ 400
≤ 320
≤ 150
≤ 390
≤ 366
≤ 242
2.4 kg
5.3 lb
5.0 kg
10.9 lb
16.1 kg
35.4 lb
2.3 kg
5.1 lb
4.8 kg
10.6 lb
15.5 kg
34.2 lb
Suction Lift*
1 m (3 ft)
1 m (3 ft)
1 m (3 ft)
1 m (3 ft)
1 m (3 ft)
1 m (3 ft)
Sound Pressure**
72.95 dB(a)
80.35 dB(a)
75.44 dB(a)
83.44 dB(a)
81.98 dB(a)
91.60 dB(a)
69.54 dB(a)
75.56 dB(a)
68.60 dB(a)
82.12 dB(a)
76.90 dB(a)
80.19 dB(a)
Sound Power**
62.42 dB(a)
70.38 dB(a)
66.94 dB(a)
75.73 dB(a)
76.37 dB(a)
83.16 dB(a)
58.44 dB(a)
64.49 dB(a)
60.66 dB(a)
73.35 dB(a)
74.22 dB(a)
76.42 dB(a)
Max Pressure
7 Bar (100 psi)
7 Bar (100 psi)
Max Temperature
100°C (212°F)
100°C (212°F)
Fluid Path Materials
Non-Fluid Path Materials
Stroke Detection Options
Proximity stroke detection
Proximity stroke detection
Leak Detection Options
Fiber optic with or without sensor, or conductivity
Fiber optic with or without sensor, or conductivity
Electronic Control

*May vary depending on configuration. Suction lift diminishes over time. Recommended installation level less than 3 ft above source.
**dB Level at 60 psi 50 CPM (top) and 60 psi maximum CPM (bottom). Sound Levels measured in accordance with ISO9614-2:1997.
***Dry-run capable PXASD030 and PXASD060 pumps require flooded suction and may have a reduced warranty unless prior arrangements are made with White Knight. Contact White Knight for details.