FLOPAM AN 923 VHM Equivalent — Medium Charge Ultra High MW Anionic PAM
FLOPAM AN 923 VHM sits at medium charge and ultra high molecular weight. It is the only entry in the nine-column SNF VHM table that appears in two variants on the same page: VHM and VHMU, with different Brookfield profiles and a viscosity reversal at 1.0 g/l. ChinaPAM supplies two routes for AN 923 VHM duty: a charge-matched medium-charge route and a chain-length-priority very-high-MW route. Jar test on your own water determines which route fits your application. If your bags read AN 926, see the [AN 926 equivalent](/products/brand-equivalents/flopam-an-926-equivalent).
Head-to-Head Comparison
Side-by-side data: Our equivalent vs SNF FLOPAM AN 923 VHM
| Parameter | Our Equivalent | SNF FLOPAM AN 923 VHM |
|---|---|---|
| Type | Anionic PAM powder | Anionic PAM powder |
| Charge Density | Two routes: medium-charge or high-charge-band (very high MW) | Medium (SNF 2007 p.34) |
| Molecular Weight | Medium or very high MW depending on route | Ultra High (SNF 2007 p.34) |
| Recommended concentration | 1–3 g/L | 3 g/l (SNF 2007 p.34, both variants) |
| Maximum concentration | Max 5 g/L | 5 g/l (SNF 2007 p.34) |
| Dissolution time | ≤60 min at working concentration | 90 min at 5 g/l and 25°C (SNF 2007 p.34) |
| Variant caution | Confirm VHM or VHMU suffix — viscosity profiles differ at 1.0 g/l | VHM: 1700/650/200 cps; VHMU: 1540/600/250 cps at 5.0/2.5/1.0 g/l |
Specifications
| Our Routes | Two available — CNfloc 1062 (charge-matched medium) or CNfloc 1054V (chain-length priority); trial selects |
| Positioned Against | SNF FLOPAM AN 923 VHM |
| Type | Anionic (partially hydrolysed polyacrylamide) |
| Their Charge Density | Medium (SNF published scale, Catalogue 2007 p.34) |
| Their Molecular Weight | Ultra High (SNF published scale) |
| Their Rec. Concentration | 3 g/l (SNF published, both VHM and VHMU variants) |
| Their Max. Concentration | 5 g/l (SNF published) |
| Their Dissolution Time | 90 min at 5 g/l, 25°C (SNF published) |
| Our Preparation | 1–3 g/L recommended; max 5 g/L; ≤60 min at working concentration |
Key Features
- Two supply routes: charge-matched medium-charge route and chain-length-priority very-high-MW route
- AN 923 is the only grade in the nine-column VHM table published in two variants (VHM and VHMU)
- VHM and VHMU share identical make-up conditions but show a viscosity reversal at 1.0 g/l (200 vs 250 cps)
- Jar test on your own water determines which route fits — both routes available for trial
- Current TDS and MSDS available; batch-specific COA with every shipment
Applications
- Procurement for processes specifying FLOPAM AN 923 VHM or VHMU by name
- Substitution screening where a buyer-specified AN 923 VHM or VHMU requires a supply route from an alternative manufacturer
- Trial and qualification for AN 923 duty where VHM and VHMU variants must be differentiated by jar test before committing to volume
Get a Quote for the SNF FLOPAM AN 923 VHM Equivalent
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What SNF Publishes for AN 923 VHM and VHMU
The figures below are from SNF SAS Catalogue 2007 Poudres, page 34. The catalogue states the data are given for information only and do not constitute a specification. Verify against a current data sheet from SNF or its distributor.
AN 923 is the only grade in the nine-column table that appears in two variant entries: VHM and VHMU. Both are at medium charge and ultra high molecular weight with identical make-up conditions (3 g/l recommended, 5 g/l maximum, 90 minutes at 5 g/l and 25°C). Their Brookfield profiles diverge: VHM reads 1700 / 650 / 200 cps and VHMU reads 1540 / 600 / 250 cps at 5.0 / 2.5 / 1.0 g/l. The 1.0 g/l reversal — VHMU higher than VHM at dilute concentration — is a published fact; the catalogue does not explain it.
AN 923 also appears in the SH, SD, and SHD suffix series on later pages of the same catalogue. Those entries are at different molecular weight bands and have different properties. The suffix on your bags determines which set of data applies.
| Property | AN 923 VHM | AN 923 VHMU | Note |
|---|---|---|---|
| Charge density | Medium | Medium | Same band |
| Molecular weight | Ultra High | Ultra High | Same band |
| Brookfield @5.0 g/l (cps) | 1700 | 1540 | VHM higher at this concentration |
| Brookfield @2.5 g/l (cps) | 650 | 600 | VHM higher |
| Brookfield @1.0 g/l (cps) | 200 | 250 | Order reverses — VHMU higher at dilute |
| Recommended concentration | 3 g/l | 3 g/l | Identical |
| Maximum concentration | 5 g/l | 5 g/l | Identical |
| Dissolution time (5 g/l, 25°C) | 90 min | 90 min | Identical |
| Storage temperature | 0–35°C | 0–35°C | Identical |
| Shelf life | 24 months | 24 months | Identical |
Two Routes and How Trial Selects Between Them
ChinaPAM supplies two routes for AN 923 VHM duty. The first is a charge-matched medium-charge anionic PAM powder (CNfloc 1062 band). The second is a chain-length-priority very-high-molecular-weight route (CNfloc 1054V band) where molecular weight is the primary selection criterion and charge is one step higher. Both routes are available for trial.
Which route fits depends on your water chemistry and the selection criterion your process uses. If your process selected AN 923 VHM primarily because of its medium charge, the charge-matched route is the natural starting point. If the selection was driven by ultra-high chain length with charge as a secondary criterion, the very-high-MW route may suit better. A parallel jar test with samples from both routes is the direct way to answer this.
Request trial samples with your water quality parameters. We will provide current TDS and MSDS plus batch-specific COA for each route. Contact us to discuss which route to trial first if your selection criteria are clear.
Dosage Guide
SNF publishes AN 923 VHM and AN 923 VHMU at 3 g/l recommended and 5 g/l maximum make-up concentration, with 90 minutes dissolution at 5 g/l and 25°C (Catalogue 2007 Poudres, page 34). The two variants share these make-up conditions but carry different Brookfield profiles. Our preparation parameters for either supply route are 1–3 g/L recommended and max 5 g/L, dissolution ≤60 min at working concentration. Establish the effective dose on your water by jar test.
Frequently Asked Questions — FLOPAM AN 923 VHM Equivalent — Medium Charge Ultra High MW Anionic PAM
What supply routes do you have for FLOPAM AN 923 VHM duty?
ChinaPAM supplies two routes: a charge-matched medium-charge anionic PAM powder, and a chain-length-priority very-high-MW route. Jar test on your own water determines which route best matches your AN 923 VHM application. Contact us with your water quality parameters to arrange trial samples for both.
What is the difference between AN 923 VHM and AN 923 VHMU?
Both variants appear on page 34 of SNF Catalogue 2007 Poudres at medium charge and ultra high molecular weight, and both share the same make-up conditions: 3 g/l recommended, 5 g/l maximum, 90 minutes dissolution at 5 g/l and 25°C. Their Brookfield profiles differ: VHM publishes 1700 / 650 / 200 cps at 5.0 / 2.5 / 1.0 g/l, and VHMU publishes 1540 / 600 / 250 cps at the same concentrations. The 1.0 g/l reversal — where VHMU reads higher (250) than VHM (200) — is a genuine published difference.
How do I tell whether I have VHM or VHMU on the basis of a viscosity measurement?
At 1.0 g/l, VHM is expected to read around 200 cps and VHMU around 250 cps — a 25% difference in that direction. At 5.0 g/l the order reverses: VHM reads 1700 and VHMU reads 1540. Neither measurement alone is definitive because other variables affect solution viscosity, but a value noticeably above 200 cps at 1.0 g/l is a reason to ask your supplier to confirm the batch suffix.
Does the viscosity reversal between VHM and VHMU matter for my process?
It depends on the operating concentration. If your process runs at or above 3 g/l, VHM gives higher viscosity. If you dilute to around 1.0 g/l before dosing, VHMU gives higher viscosity. Using the wrong variant's data for make-up or dosage calculations at dilute concentration produces a systematic error in that direction. Confirm the variant suffix before specifying a dose rate.
Does this page apply if my bags say AN 923 with a suffix other than VHM or VHMU?
No. AN 923 appears in other SNF suffix series (SH, SD, etc.) with different molecular weight and viscosity characteristics. The figures on this page are from the VHM/VHMU entries on page 34 of SNF Catalogue 2007 Poudres only.
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Trademark notice. SNF FLOPAM AN 923 VHM and all other third-party product and brand names on this page are trademarks or registered trademarks of their respective owners. Henan Jinghua New Material Technology Co., Ltd. is not affiliated with, endorsed by, sponsored by or authorised by those owners, and no such relationship is implied. Those names are used here for the sole purpose of identifying the products our grades are compared against, which is necessary to describe what we supply. Our products are independently manufactured and are not licensed copies. Grade descriptors quoted for third-party products are taken from each manufacturer’s own published literature and follow that manufacturer’s own scale; we do not publish figures those manufacturers do not publish. Performance on your process should be confirmed by jar test or CST test before any change of supply.