Pumps for Smooth Flow without Pulsation

High-Purity Laminar Flow Pumps for Advanced Chemical Processes


LHA Series laminar flow pumps offer steady flow rates up to 30 lpm and feature process-safe PTFE/PFA flow paths. They are capable of up to 100°C (212°F) fluid temperatures, 5.5 Bar (80 psi) air supply pressures, and suction lift up to 3 m (10 ft).

Features & Benefits

  • Laminar flow up to 30 lpm
  • Process-safe PTFE/PFA flow paths
  • No elastomer O-rings; never retorque
  • Reliable operation with leak-free seals
  • Analog signal stroke detection
  • Fiber optic and conductivity leak detect
  • Copolymer check cages minimize wear and extend life
  • Various liquid connection styles and sizes
  • Proven robust bellows technology
  • Air supply pressure up to 5.5 Bar (80 psi)
  • Dead-head capable operation
  • Suction lift up to 3 m (10 ft)
  • Minimal parts for durable design
  • Durable machined design
  • Easy to install and service
  • Class 100 cleanroom assembly, testing, and packaging
  • No preventative maintenance during two-year warranty
White Knight Two-Year Warranty
CE Certification Mark
Chemical Recirculation and Delivery 5.5 Bar (80 psi) Pressures
Pump Temperatures to 100 Degrees Celsius (212 Degrees Fahrenheit)



Flow Rate*
≤ 30 lpm (7.8 gpm)
Air Connection
1/4" FNPT
Fluid Temperature
≤ 100°C (212°F)
Supply Air Pressure
≤ 5.5 bar (80 psi)
Startup Air Pressure
≥ 1.4 bar (20 psi)
Suction Lift*
3 m (10 ft)
Fluid Path Materials
Non-Fluid Path Materials
PTFE, PFA, Viton, Neodymium
Stroke Detection Options
Hall Effect Sensor (NPN or PNP)
Leak Detection Options
Fiber optic with or without sensor, or conductivity
Electronic Control
Call for details

*May vary depending on configuration. Suction lift diminishes over time. Recommended installation level less than 3 ft above source. Contact White Knight for details.

Connection Details

Air Requirements
Maximum Air Supply
≤ 5.5 bar (80 psi)
Minimum Air Supply
> 26 SCFM, ≥ 1.4 bar (20 psi)
Air SignalsTwo 5-way valves (center vent) or Four 3-way valves (normally closed)
Valves with metal seals are recommended for longer life
Electrical Requirements
24 VDC Power Power consumption depends on current draw on external devices:
 Controller power alone 4 watts
 Max Digital Output current (500 mA sourcing or 24 mA sinking)
 Max Analog Output current (10 mA total voltage output or 20 mA with 4-20 mA conversion board)
Pump Connections
 Four air connections 1/4-in NPT with quick exhaust connectors (one fill and one dispense for each side
 Two leak detect sensor connections 1/4-in NPT (one for each side)
 Two fluid connections configurable to various tube connections (one inlet and one outlet)
 Two analog hall effect stroke sensing
Controller Connections
Digital OutputsFour solenoid signals
Two stroke rate signals (for tool feedback)
Pump running signal (for tool feedback)
Alarm output (for tool feedback)
Digital InputsRemote signal left
Remote signal right
Enable scaled output signal
Retrain pump sensors
Leak detect input
Reset Alarms
Analog Inputs
Two stroke sensors