Goulds 3196 Frame Size & Power-End Compatibility Guide
Identify the installed Goulds 3196 generation and power-end family before cross-referencing a replacement part. Start with the frame designation, pump size, nameplate, OEM reference or installed measurements. Pump size alone may narrow the possibilities, but it does not always distinguish MTX from LTX or MTi from LTi.
Identify the Installed 3196 Frame / Power End
Start with what you know. The tool narrows the likely family; it must not claim final interchangeability from pump size alone.
Legacy X-Series vs Goulds 3196 i-FRAME
The familiar ST / MT / LT / XLT family names span more than one Goulds 3196 generation. Use the generation as part of the identification process instead of treating the legacy and i-FRAME designations as automatically interchangeable.
| Legacy X-Series family | i-FRAME power end | OEM interchangeability-drawing shaft reference* | Max BHP context |
|---|---|---|---|
| STX | STi | 1-3/8 in | 40 HP |
| MTX | MTi | 1-3/4 in | 122 HP |
| LTX | LTi | 2-1/8 in | 200 HP |
| XLT-X | XLTi | 2-1/2 in | 250 HP |
| X-17 | i-17 / 350-BHP-shaft configuration | 2-3/4 in | 350 HP |
* These are the shaft references stated in the Goulds 3196 i-FRAME interchangeability drawing for the shaft-and-bearing-frame assembly. Do not interpret one value as the shaft diameter at every axial location or as a complete manufacturing dimension.
Goulds construction-detail tables contain location-specific shaft and sleeve dimensions, and 17-inch / 350-BHP-shaft configurations have special dimensional notes. Verify the exact installed arrangement before ordering shafts, sleeves, bearing isolators, seal-chamber components or other power-end-sensitive parts.
Similar family names help organize identification, but the generation must still be confirmed before ordering power-end or interface-sensitive parts.
Use Pump Size to Narrow the Frame — Not to Confirm It
Pump size is useful as a first filter. The Goulds modular-interchangeability reference groups some hydraulic sizes under shared MTi/LTi power-end context, so the complete installed power end still has to be verified.
Small-frame size family
- 1×1.5-6
- 1.5×3-6
- 2×3-6
- 1×1.5-8
- 1.5×3-8
STX legacy / STi i-FRAME family
MT/LT shared hydraulic-size family
- 3×4-7
- 2×3-8
- 3×4-8
- 3×4-8G
- 1×2-10
- 1.5×3-10
- 2×3-10
- 3×4-10
- 3×4-10H
- 4×6-10G
- 4×6-10H
- 1.5×3-13
- 2×3-13
- 3×4-13
- 4×6-13
MTX/LTX legacy or MTi/LTi i-FRAME family — verify installed power end
The current Goulds brochure groups these dimensions under an MTi/LTi family presentation. Use the size only to narrow to the MT/LT family; do not claim the exact installed MT versus LT power end solely from the size.
Large XLT / high-power family
i-FRAME brochure list
- 6×8-13
- 8×10-13
- 6×8-15
- 6×8-15N
- 8×10-15
- 8×10-15G
- 8×10-16H 350 BHP shaft context
- 3×4-17 350 BHP shaft context
- 4×6-17 350 BHP shaft context
- 6×8-17 350 BHP shaft context
- 8×10-17 350 BHP shaft context
Result: XLTi / i-17 i-FRAME family — verify the installed power end and shaft arrangement.
350 BHP shaft context: these source-marked sizes use the higher-power shaft arrangement in the Goulds modular-interchangeability reference. Do not infer the exact installed power end from size alone.
Large XLT / high-power family
Legacy X-Series brochure list
- 6×8-13
- 8×10-13
- 6×8-15
- 8×10-15
- 8×10-15G
- 8×10-16H 350 BHP shaft context
- 4×6-17 350 BHP shaft context
- 6×8-17 350 BHP shaft context
- 8×10-17 350 BHP shaft context
Result: XLT-X / X-17 legacy family — verify the installed power end and shaft arrangement.
Source boundary: the legacy source used for this specification does not list 6×8-15N or 3×4-17 in its modular-interchangeability figure. Do not silently add those two variants to the legacy list.
Why Pump Size Alone Cannot Always Separate MT from LT
Several Goulds 3196 hydraulic sizes are shown in a shared MTi/LTi modular-interchangeability context. The hydraulic size therefore helps identify the wet-end family, but it does not by itself prove which power end is installed.
Use this evidence in order
- Installed frame / power-end marking
- Nameplate and serial number
- OEM part number or previous repair record
- Power-end photographs
- Approved drawing
- Relevant installed measurements
When MT versus LT remains uncertain, send the evidence for engineering review before ordering shafts, sleeves, bearing-frame components, bearing isolators or other power-end-sensitive parts.
Start With What You Have
Search the existing cross-reference first, then verify the pump family, frame, material and configuration.
Record the model, size, serial number and any visible frame or power-end designation.
Use the size map to narrow the likely family. MT/LT configurations still require additional evidence.
Send the position, part number if visible, photos and available measurements together with the pump identity.
Continue to the Correct 3196 Component Path
The linked bearing-isolator guide is i-FRAME-focused. For a verified legacy X-Series unit, do not assume the i-FRAME VB-XX-D reference; use the legacy evidence or request engineering review.
Engineering Source Basis
Frame and size relationships on this page are organized from Goulds 3196 X-Series and 3196 i-FRAME construction and modular-interchangeability references. The values are presented for identification and cross-reference support, not as manufacturing drawings or final proof of interchangeability.
Generation
Confirm legacy X-Series versus i-FRAME before selecting power-end-sensitive parts.
Identification dimensions
Use shaft and construction values only in the exact location/context stated by the engineering reference.
Final fit
Confirm the installed pump, frame, part position, OEM reference, material and configuration before production.
Source basis: Goulds 3196 i-FRAME product reference; Goulds 3196 i-FRAME brochure; and Goulds Model 3196 X-Series Bulletin 725.1, April 2005.
Frame and Compatibility Questions
Is STX the same as STi?
They belong to corresponding small-frame generations, but STX is legacy X-Series terminology and STi is i-FRAME terminology. Do not assume every power-end component is interchangeable without confirming the installed generation and interfaces.
Can pump size tell me whether my 3196 is MTX or LTX?
Not always. Several hydraulic sizes can appear in shared MT/LT family context. Use the installed power-end marking, nameplate, serial number, OEM reference, photos or drawing to separate MT from LT.
What is the difference between XLT-X and XLTi?
XLT-X is the legacy 250-HP-family designation and XLTi is the corresponding i-FRAME designation. Goulds legacy documentation also identifies X-17 for the 350-BHP-shaft context, while i-FRAME documentation uses i-17. Do not treat X-17/i-17 as simply another spelling of XLT-X/XLTi; verify the installed generation and construction.
What does the shaft reference on this page mean?
It is the shaft reference used by the Goulds interchangeability drawing for the shaft-and-bearing-frame assembly. It is an identification aid, not a statement that the shaft has the same diameter at every axial location and not a complete shaft drawing.
Does identifying the frame automatically identify the impeller?
No. Impeller selection still requires the pump size, wet-end family, OEM reference, current trim or diameter, material and hydraulic duty.
What should I send if the frame is unknown?
Send the nameplate, serial number, complete pump size, OEM number if available, power-end photographs, removed-part photographs and any approved drawing or relevant measurements.
Are 332A and 333A mechanical seals?
No. They identify labyrinth bearing-isolator / oil-seal positions: 332A is outboard and 333A is inboard. The i-FRAME brochure lists INPRO VB-XX-D for these positions; the legacy X-Series brochure lists the legacy VB-XX-B designation, so generation must be confirmed before cross-reference.
Need Help Confirming the 3196 Frame?
If the frame, generation or installed part is still uncertain, send us the pump nameplate, serial number, pump size, OEM reference, power-end photos and any available drawing or measurements. Our team can review the identification before you order replacement parts.
Include as much installed-equipment information as possible so the review can start from the correct Goulds 3196 generation and power-end context.