SKU: 8312668352

4" x 40" |PS Microfiltration Membrane Element | Polysulfone MF

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Description

4" x 40" |PS Microfiltration Membrane Element | Polysulfone MF4" x 40" Microfiltration Membrane (MF Membrane) Polyslfone (PS) 20,000 MWCO Applied Membranes, Inc. (AMI) polysulfone spiral wound microfiltration elements provide microfiltration with a molecular weight cut off of 20,000 and are ideal for removal of suspended solids and clarification. AMI Microfiltration Membrane elements are among the finest in the industry. Since 1983, AMI PS MF Membrane elements have earned the reputation of consistent quality.


4" x 40" Microfiltration Membrane (MF Membrane) | Polyslfone (PS) | 20,000 MWCO

Applied Membranes, Inc. (AMI) polysulfone spiral wound microfiltration elements provide microfiltration with a molecular weight cut-off of 20,000 and are ideal for removal of suspended solids and clarification. AMI Microfiltration Membrane elements are among the finest in the industry. Since 1983, AMI PS MF Membrane elements have earned the reputation of consistent quality.

AMI 4x40 Microfiltration Membrane is the industry standard 4x40 size, for universal fit into most standard 4x40 membrane housing pressure vessels.

AMI MF Membranes are in their ISO 9001:2015 Certified Facility and are 100% Quality and Performance Tested.

M-M4040PS20 Specifications

AMI Part Number: M-M4040PS20
Membrane Size (Nominal): 4 x 40
Membrane Dimensions: 3.9"Dia. x 40"L
Membrane Type: Microfiltration (MF) Polysulfone
Molecular Weight Cut-Off (MWCO) 20,000*
For Housing: Standard 4" x 40"
Outer Wrap: Tape Wrapped
Element Type: Spiral Wound
Element Style:


 Standard / Male
(with "stinger")
3/4" Male PWT
Manufacturer: Applied Membranes, Inc.
Country of Manufacture: United States (USA)

*Design Note: MWCO is defined as the molecular weight of the challenge material which the membrane rejects at a rate of 90% or better.

Features of AMI Polysulfone Microfiltration Membranes

  • Filtration to 20,000 Molecular Weight Cut-Off (MWCO)
  • Robust Materials and Construction for Long Life
  • Manufactured in our ISO 9001:2015 Certified Facilities
  • 100% Performance and Quality Tested
  • Backed by our Experienced Technical Support Staff
  • High Quality for Consistent and Reliable Performance
  • Uses the most advanced membrane technology and manufacturing processes
  • Standard dimensions to fit in commonly available housings

Applications for AMI Polysulfone Membranes

  • Post-Treatment of ultrapure water
  • Removal of suspended solids
  • Process steam clarification, such as sugar solutions

Physical Dimensions of M-M4040PS20:

Total Length (L):

40 In. (101.6 cm)

Membrane Length (I):

38 In. (96 cm)

Diameter (D):

3.9 In. (9.9 cm)

PWT (P):

0.75 In. (1.9 cm)

Replacement Compatibility for AMI 4 X 40 Microfiltration Membranes

Applied Membranes M-M4040PS20 MF membrane elements fit industry-standard 4x40 membrane housing pressure vessels and can be used as direct replacement for many industry-standard 4x40 size Microfiltration PS elements with 3/4" male product water tubes ("stinger style").

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 8312668352

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4.7 ★★★★★
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T
Tati
Alexandria, US
★★★★★ 4
Halo patches
I tried the Halo Dot Ultra Thin Pimple Patches, and overall I’m really impressed with them. In terms of effectiveness, they work well at helping bring pimples to a head and protecting spots overnight so they don’t get worse or irritated. The value for money is good since you get a decent amount in the pack and they’re thin enough to use during the day or night without being too noticeable. They’re super easy to use—just clean skin, place the patch, and go—and I like that they stay in place pretty well. I also find them pretty versatile, since you can wear them at home or out and about if you get a discreet one. For skin sensitivity, they’ve been gentle on my skin with no irritation, which is a big plus for me. Overall, they’re a simple, effective skincare staple I’d definitely keep on hand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
C
Cheeky M.
San Leandro, US
★★★★★ 5
Nice patches -- Fair price -- has sulfur!
This is a review for the Halo Dot™ Pimple Patches for Face, Hydrocolloid Acne Patches with OptiMSM®, Visibly Shrinks Zit & Whitehead- Comes with Travel Essentials Inner Pouch (33 PATCHES) ($12.59) PROS: Price -- a fair deal for 33 patches and consistent with pricing of most other similar patches online. The inclusion of sulfur (this OptiMSM business) makes these unique also -- I can't seem to find others on Amazon with similar formulation, so these are intriguing. Sulfur is known for antimicrobial properties and can be helpful for zits and a little bit gentler on your skin than benzoyl peroxide or salicylic acid -- but anytime I put any sulfur stuff on zits that are above or around my eyes, it seems to migrate INTO my eyeball while I'm asleep and man is that uncomfortable. This little patch solves that dilemma nicely by keeping the sulfur put. CONS: none that I can see; these are a nice entry into the hydrocolloid acne patch space.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
J
Jennifer
Birmingham, US
★★★★★ 3
Disappointing results and poor adhesion.
I love Hydrocolloid pimple patches. I have used at least half of the brands available for sale and even the non brand ones. I’ve also used the hydrocolloid sheets and cut them to size and the hydrocolloid gel bandaids and used for pimple patches. I love how they help along the healing and keep me from picking at the pimple. This brand I wasn’t impressed by. None of them stayed on my face for half the night. The one that remained in place the longest out of the 4, didn’t show any signs of improvement. The longest they kept in place was 3 hours. I had to reapply and I still handbrake noticed any signs of healing after using one full sheet on 4 smaller sized blemishes because the adhesive wasn’t working.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
N
NK
Houston, US
★★★★★ 5
Stops Me From Picking and Actually Works
As a woman in my 40s, I never would have guessed I’d still need pimple patches, yet the occasional zit still pops up — and these things are like magic. They work really well, blend into my fair/light skin nicely, and are barely noticeable at a quick glance. I’m also a terrible picker, and picking is so bad for your skin, so I love that these keep me from messing with pimples while doing all the work for me overnight. I’m always grossly fascinated by how much gunk they pull out by morning. Very happy to have these in my little skincare emergency arsenal.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
E
Elis
Grantham, US
★★★★★ 5
Camouflages well with the skin and sticks long enough
I was excited to try these Halo Dot patches because I was having some breakouts before a wedding I had to attend. I put these on three nights before the wedding only at nights and left them on until the morning. I washed my face the 1st night, yet the second night I did not and it still attached (mind that I have a very oily face by the end of the day). With every application I saw good results as the breakouts were being reduced with each use. It is easy to put on and to carry out if you need to travel because it comes in two separate little envelope like package that you can put in a backpack/purse. These are thin and are almost not visible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026

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