G196 Series · Low Flow
The G196 Low Flow model is the LF hydraulic branch of the ANSI/ASME B73.1 G196 process-pump family, intended for duty points below the practical range of a general-purpose selection. It exists because of what happens when a larger pump is throttled into a small duty — recirculation, rising vibration and a hotter seal environment — and it is selected from the required flow, head, system conditions and an approved pump curve, never from a series envelope.
The G196 Low Flow in the YSM Pump Programme
A centrifugal pump runs where the pump curve and system curve intersect. When the duty point sits far left of a general-purpose size’s best-efficiency region, the pump still runs — but with suction recirculation, higher radial loads, vibration and a hotter seal environment that shorten seal and bearing life. That trade is why the dedicated LF sizes exist: instead of throttling a larger pump into a small duty, the low-flow branch puts a right-sized hydraulic on it.
General Purpose
G196 General Purpose Pump
For duty points within the broader general-purpose hydraulic range — the family default, with the published envelope, sizes, installation drawings and sectional sheets on its page.
View the G196 General Purpose pumpSeries context
G196 Series ANSI Chemical Process Pumps
Family sizes, frame parts-commonality charts, performance coverage curves and interchangeability tables — the family-level record this LF page builds on.
Explore the G196 SeriesQuick Selection Summary
| Standard | ANSI/ASME B73.1 family | Duty position | Dedicated low-flow process service |
|---|---|---|---|
| Confirmed LF sizes | 1×1.5-8LF, 1×2-10LF, 1.5×3-13LF | Family frames | STX and MTX/LTX size groups represented in current source |
| Selection basis | Duty point, system curve and approved pump curve | Materials | Selected from confirmed liquid and operating data |
The current source does not provide a separate LF performance envelope. G196 series maximums must not be treated as guarantees for these LF sizes.
Confirmed LF Sizes and Parts Coverage
LF size codes follow the family convention — discharge × suction − nominal impeller diameter, with the LF tag marking the dedicated low-flow hydraulic. Three sizes are confirmed in the current source, each held with casing and impeller reference entries.
| LF size | Frame group | Current source coverage |
|---|---|---|
| 1×1.5-8LF | STX | Casing and impeller reference entries |
| 1×2-10LF | MTX / LTX | Casing and impeller reference entries |
| 1.5×3-13LF | MTX / LTX | Casing and impeller reference entries |
Send the frame, size and existing reference before requesting a drawing or replacement component — the Replacement Parts Center carries the family’s parts coverage, materials and ordering steps.
Where the Low-Flow Review Starts
The recurring situations behind LF enquiries, each linked to the guide that prepares a reviewed enquiry for it.
Dedicated low-flow process duties
Small-capacity dosing, transfer and circulation services where the normal flow sits below the practical range of the smallest general-purpose sizes. Low-flow application guide →
Operating-point and system-curve review
Duties where the honest first question is where the pump will actually run — system curve, BEP position and control method decide whether an LF size or a general-purpose size serves the duty. System curve, BEP and low-flow guide →
Replacement of installed LF sizes
Parts and like-for-like review for LF pumps already in service, from the frame, size and existing reference. Maintenance & replacement guide →
Design, Seal and Shaft Options
The LF model sits within the G196 family architecture: external impeller adjustment, multiple bearing-frame sizes, standard, large-bore and taper-bore seal-chamber choices, labyrinth bearing isolators, and multiple shaft or shaft-sleeve combinations. Low-flow service makes the seal environment matter more, not less — at small flows the chamber’s volume and circulation carry more of the heat-management burden — so the chamber is confirmed together with the sealing plan. The selected LF configuration still requires technical confirmation.
Materials of Construction
Published G196 wet-end options may include WCB, CF8M/316SS, CD4MCu, CN7M/Alloy 20, Monel, Nickel, Hastelloy, Titanium and selected zirconium-alloy scope. Availability varies by component and LF size — which is why the material conversation starts from the service, not from the alloy list.
Do not select material from a liquid name alone. Confirm composition, concentration, temperature, pressure, impurities, solids and corrosion conditions — the material input checklist prepares that review.
Performance Curves, Dimensions and Replacement Parts
Because the knowledge base does not contain independent LF curves, final flow/head suitability remains pending curve review — an LF selection issued without its curve would be exactly the guess this page exists to prevent. Dimensions and parts scope are provided after the LF size and reference are confirmed. Pump down or planning maintenance? A nameplate photo and a short parts description is the fastest route — the urgent parts RFQ checklist collects everything in one request.
Interchange guides: G196 vs Goulds 3196 — what ASME B73.1 fixes and what is confirmed before order · Goulds 3196 replacement manufacturers compared.
G196 Low Flow FAQ
What data is required to select the G196 Low Flow pump?
Provide minimum, normal and maximum flow, required head, system curve, liquid properties, temperature, solids, suction conditions, operating schedule and motor supply. The complete operating range matters more than the nominal flow — it decides whether the duty sits inside an LF size’s practical range.
Can G196 series maximums be applied to the LF model?
No. Series-level values are not guarantees for an LF size. Use the approved curve and size-specific configuration limits — the current source holds no separate LF performance envelope, so the curve review is the selection.
Why not throttle a general-purpose pump into a low-flow duty?
It will run, but far left of best efficiency: suction recirculation, higher radial loads, vibration and a hotter seal environment shorten seal and bearing life. That trade is why the dedicated LF sizes exist. If the normal flow sits well below the general-purpose coverage, start here instead.
How does an LF size code like 1×2-10LF read?
Discharge × suction − nominal impeller diameter, in inches, with the LF tag marking the dedicated low-flow hydraulic: 1-inch discharge, 2-inch suction, nominal 10-inch class. The frame group follows from the size — confirm the exact designation during review. Both size-code conventions are explained in ANSI pump size codes.
How are materials and seals confirmed?
They are reviewed from liquid composition, concentration, temperature, pressure, impurities, solids and leakage requirements. At low flow the seal environment carries more of the heat-management burden, so the chamber and sealing plan are confirmed as one decision.
Can an existing LF part number be reviewed?
Yes. Send the model, frame, size, reference, nameplate, drawing or sample information. Final cross-reference conclusions require technical and commercial review — a reference number alone is not treated as a fit conclusion.
Can you supply replacement parts for installed LF pumps?
Yes — the three confirmed LF sizes are held with casing and impeller reference entries, and the Replacement Parts Center carries the family’s wider parts coverage, materials and ordering steps. For obsolete or undocumented parts, the reverse-engineering path works from a drawing, sample or dimensioned photographs.
Are OEM or branded (ODM) orders supported?
Yes — OEM and ODM programmes are part of the standard offer (see About YSM Pumps). Branding, documentation and packaging requirements enter the same technical-commercial review as the pump itself; state them in the enquiry rather than after order.
How is pricing confirmed?
Quotations are issued against a reviewed selection — LF size, materials, sealing, scope and quantity — confirmed on the approved curve, not against a model name alone, which is why no public price list exists. Send the complete operating range and requirements; the quotation then references the size-specific configuration it prices.
What are the lead time and warranty for this pump?
Typical lead time is 4 weeks for a complete pump, 2 weeks for a bare wet end and 1 week for replacement parts, from deposit and approved drawings. Warranty is 12 months from shipment against defects in materials and workmanship within the reviewed duty. Late shipment attributable to YSM is compensated at 0.5% of contract value per week, capped at 5%.
What are the payment and delivery terms?
30% T/T deposit within 7 days of order, 70% T/T before shipment, or irrevocable L/C at sight; export-grade wooden-case packing; any Incoterms 2020 term (EXW Zibo, FOB Qingdao, CIF, DAP/DDP) as agreed in the quotation. Factory witness testing and third-party inspection (SGS, BV, TÜV) are accepted. Full terms: Commercial Terms
Request a G196 Low-Flow Quote
The form below carries the initial request; drawings, nameplate photos and any remaining data can follow during review. The technical review uses, where available: the complete operating range — minimum, normal and maximum flow with required head, not only the nominal point — plus the system curve and control method, liquid properties, temperature, solids, viscosity, suction conditions, operating schedule, material and seal preferences, motor voltage and frequency, quantity, documentation needs, destination and target delivery date. For replacement work, add the model, frame, LF size, existing reference and a nameplate photo.
Open “Add technical details” to fill in what you know, and mark anything uncertain as unknown — a marked gap is reviewable, a silent one is not.
Pump RFQ
Replied by the technical team with the curve-confirmed configuration and quotation scope.
Low-Flow Suitability Decision Guide
Low-flow service is reviewed from a curve and system perspective — the fastest quotation starts on the right page, with the right data.
Start with this page when
- The required flow falls below the usable range of a general-purpose pump and needs a dedicated hydraulic review.
- ANSI dimensional standardisation is part of the project requirement.
- An installed LF size needs parts or a like-for-like review.
Review another page when
- The duty sits within the general-purpose range: start from the G196 General Purpose page.
- A reverse-vane low-flow configuration is preferred: review the D Mark III Low Flow page.
- The wider family is the question: compare on the G196 Series page.
Low-Flow Selection Path
Review the low-flow process pump application guide and the complete duty-data checklist before requesting a curve.
Operating-Point Review
Use the system curve, BEP and low-flow guide to define the required curve and operating range.
