Product Specifications For S P I Ultrafiltration Products:

Model Membrane
Type
Membrane
Support
Water
Flux
L/m2 h
Max
Temp
pH
Range
CA1
(1,000 mwco)
Cellulose
Acetate
Polyester
(aqueous use only)
20-25 104 F
(40 C)
2-8
PES 4
(4,000 mwco)
Polyethersulfone Polypro 30-60 140 F
(60 C)
1-12
C5
(5,000 mwco)
Regenerated
Cellulose
Polypro 25-35 140 F
(60 C)
1-12
PES 8
(8,000 mwco)
Polyethersulfone Polypro 80-140 140 F
(60 C)
1-12
C10
(10,000 mwco)
Regenerated
Cellulose
Polypro 40-60 140 F
(60 C)
1-12
PES10
(10,000 mwco)
Polyethersulfone Polypro 120-180 140 F
(60 C)
1-12
C30
(30,000 mwco)
Regenerated
Cellulose
Polypro 300-700 140 F
(60 C)
1-12
PES50
(50,000 mwco)
Polyethersulfone Polypro 300-600 140 F
(60 C)
1-12
PS100
(100,000 mwco)
Polysulfone Polypro 300-600 140 F
(60 C)
1-12

(additional membranes are under development and may be available)

HOLD-UP VOL-mls *

SPI
CASSETTE- 5ft.    738

MILLIPORE-
PROSTAK- 20ft.   1,650

SPI **
SPIRAL - 40ft.       102

*    after blowdown
** SPI FULL FIT SPIRAL DESIGN DOES NOT REQUIRE
     A CHEVRON BRINE SEAL

 

Test conditions: stirred cell, 44 PSI, 700 RPM Max pressure for all membranes = 147 psi,
Stirred Cell, Cassette, DDS & Spiral configurations (1-70 sq.ft. spirals)
The same materials of construction are used for all devices to streamline R&D through scaleup.

Membrane Chemical Compatibility With Common Solvents:
ACETIC ACID < (5-25%) OK
ACETONE < (70%) OK
ACETONITIRLE < (70%) OK
FORMIC ACID < (70%) OK
ETHANOL < (70%) OK
ISOPROPANOL < (50%) OK
METHANOL < (70%) OK
REAGENT GRADE ALCOHOL < (100%) OK
SODIUM HYDROXIDE (0.1N) OK (Additional compatibility, recirculation, cleaning storage, and technical data available on request)

Twice the flux at one-half the cost!   It is important to compare flux rates, chemical compatibility’s and cost per sq.ft. to discover important features and benefits offered by STI. In certain applications, twice the flux rate or more has been achieved when compared to competitive membranes.

COST: The SPI spiral design offers unique advantages over numerous cassette and older spiral designs. Flux, Pressure, Holdup volume, Solvent compatabilities, Cleaning, Power, Pumping, Mfg area requirements, filter Life and costs per sq.ft are often improved by STI designs and membranes by SPI. Call or e-mail  for details.