HP4750 Stirred Cell, for Operation up to 1000 psig

HP4750 stirred cell is a 316 Stainless Steel High Pressure Stirred cell designed for performing membrane studies and small batch processing. 
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HP4750 Stirred Cell, for Operation up to 1000 psig Icon

The Sterlitech HP4750 stirred cell is a high-pressure stirred cell that is both chemically resistant and features a low hold-up volume (1 ml). This particular brand of stirred cell is able to perform a wide variety of membrane separations.

HP4750 Stirred Cell Product Benefits:

  • Max operating pressure is 1000 psi
  • Removable PTFE stir bar
  • 316 stainless steel


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Safe Operation: Volatile solutions can be processed safely because the Sterlitech™ HP4750 operates on standard sources of compressed air or inert gases (nitrogen, argon, etc.). This provides the user with a variable, safe and consistent supply of pressure to effect membrane separations.

High-Pressure Operation: Solutions with high levels of dissolved solids and high osmotic pressure can be separated with the Sterlitech™ HP4750. The cell is designed for safe operation to 1000 psig (69 bar).

Removable Stir Bar: Concentration polarization at the membrane surface is minimized by a PTFE-coated magnetic stir bar mechanism. The stir bar can be driven by any standard stirring plate.

Accepts Standard Membrane Discs: Sterlitech™ HP4750 Stirred Cell accommodates any 47 to 50 mm diameter membrane disc.

Chemically Resistant Materials of Construction: 316L stainless steel construction makes the Sterlitech™ HP4750 resistant to most chemical degradation. Buna-N gaskets and O-rings are provided as standard with other optional materials available to meet operating requirements.

Unique Design: The cell top can easily be removed to fill the vessel with up to 300 mL of solution. The cell bottom is removable for quick membrane change-out. The top and bottom are secured to the vessel with mechanical couplings. This unique design enables low hold-up volume, down to as low as 1 mL, so valuable solutions are not wasted.


HP4750 Comparison:


 Membrane Size 1.93 in dia. nominal (49 mm) 1.93 in dia. nominal (49 mm)
 Active Membrane Area 2.26 in2 (14.6 cm2) 2.26 in2 (14.6 cm2)
 Processing Volume Up to 300 mL Up to 300 mL
 Hold-Up Volume 1 mL 1 mL

 Max Pressure
1000 psig (69 bar) w/high-pressure clamps 2500 psig (172 bar)

 Max Temp
250 °F (121 °C) at 800 psig (55 bar) 400 °F (205 °C) at 2000 psig (138 bar)
 pH Range Membrane Dependent Membrane Dependent
 Connections Permeate Outlet: ⅛ in dia. 316L SS tubing;
Pressure Inlet: ¼ in FNPT
Permeate Outlet: ⅛ in dia. 316L SS tubing;
Pressure Inlet: ¼ in FNPT

 Cell Body
316L Stainless Steel 316L Stainless Steel

Buna-N, others available as options Viton or PTFE

Buna-N, others available as options Viton or PTFE

 Stir Bar

 Cell Diameter
2.0 in (5.1 cm) 2.75 in (7.0 cm)

 Cell Height
7.8 in (19.9 cm) 10 in (22.4 cm)

 Cell Width
5.7 in (14.6 cm) w/high-pressure couplings NA

Principles of Operation (image will open in new window)

HP4750 Manual PDF

HP4750 Pressure Regulator Assembly   PDF



HP 4750 Stirred Cell


Q. What size membrane does the HP4750 Stirred Cell use?

A. Any 47-50mm membrane disc can be used.

Q. What material is the HP4750 Stirred Cell made out of?

A. The cell itself is constructed of 316 stainless steel and utilizes a PTFE coated stirrer for chemical resistance.

Q. What type of stir plate do you recommend for use with the HP4750 Stirred Cell?

A. Any conventional magnetic stirrer will work.

Q. What do I do to release the pressure on the HP4750 Stirred Cell?

A. You will need a tee that has a needle valve so that you can slowly release the pressure when ready to lower the pressure. You will need a needle valve rated for at least 1000 psi with a ¼' NPT.

Q. Can I cut a membrane for use in the HP4750?

A. Yes, use the metal membrane support as a guide for cutting a disc.