Ampco AC328MD21T-S 3 x 2 Sanitary Pump End Only Kit

Ampco Pumps AC328MD21T-S PEO 3 x 2 Kit — Sanitary Centrifugal Pump End Only

The Ampco Pumps AC328MD21T-S PEO 3 x 2 Kit is a complete pump end only assembly from the Ampco AC/AC+ Series of sanitary centrifugal pumps. "PEO" means exactly what it sounds like — you get the wet end, not the motor. That makes this kit the practical choice when a motor on an existing line is still healthy and it is the pumping element that has worn out, or when a plant standardizes on its own motor supply and simply needs a fresh fluid end to bolt up to a 210TC or 215TC frame.

Construction follows the sanitary rulebook rather than general industrial practice. The casing is 316L stainless steel, with the backplate, impeller, and stub shaft in 316 stainless and the adapter in 304, and every product contact surface carries a 32 Ra (150 grit) finish so residue has nowhere to hide during clean-in-place cycles. Ports are 3 inch inlet by 2 inch outlet with Tri-Clamp connections, and the D-code seal in this model is a single external balanced mechanical seal built with a carbon rotary face, stainless seat, and Buna elastomers — a combination that holds up well against mildly corrosive products and washdown chemistry alike.

Where this kit really earns its keep is in retrofit work. Ampco designed the AC Series to interchange dimensionally with legacy competitive C-Series pumps, so an aging pump end can often be swapped without touching the baseplate, piping runs, or motor. Processors in dairy, food and beverage, brewing, personal care, and pharmaceutical utility service use it as a stocked spare precisely because the changeover is measured in hours rather than days. Despite the stainless construction and washdown pedigree, this is a land-based process pump built for sanitary production lines — it is not a marine or seawater product.

Key Features

• Pump end only (PEO) kit — complete sanitary wet end supplied without motor
• 316L stainless steel casing with 316 stainless backplate, impeller, and stub shaft
• 304 stainless steel adapter machined for 210TC / 215TC motor frames
• Type D single external balanced mechanical seal: carbon rotary, stainless seat, Buna elastomers
• 32 Ra (150 grit) finish on all product contact surfaces for reliable CIP results
• Tri-Clamp ("M" code) sanitary connections on both inlet and outlet
• Open-style impeller design for gentle, low-shear product handling
• Dimensionally interchangeable with legacy competitive C-Series pump ends for straightforward retrofits
• Backplate-removal design allows seal service without disturbing casing or piping
• Conforms to 3-A Sanitary Standard 02-10 for centrifugal and positive rotary pumps

Applications

• Dairy processing: milk, cream, whey, yogurt, and cultured product transfer
• Food and beverage production: juices, syrups, sauces, liquid sweeteners, and brines
• Brewing and distilling: wort transfer, beer movement, and cellar duty
• Personal care and cosmetics: lotions, shampoos, and emulsion transfer
• Pharmaceutical and nutraceutical utility and process water service
• Clean-in-place supply and return circuits
• General sanitary process transfer where washdown and product purity are required
• Retrofit and replacement of worn or obsolete 3 x 2 sanitary pump ends

Specifications

• Manufacturer: Ampco Pumps Company
• Part Number: AC328MD21T-S
• Product Type: Pump end only (PEO) kit — motor not included
• Series: Ampco AC / AC+ Series sanitary centrifugal
• Model: 328
• Port Size: 3 inch inlet x 2 inch outlet
• Connection Type: Tri-Clamp sanitary (code M)
• Impeller Diameter: 6-1/2 inch (open impeller)
• Motor Frame Adapter: 210TC / 215TC (code 21T)
• Seal Code: D — single external balanced mechanical seal
• Seal Materials: carbon rotary face, stainless steel seat, Buna elastomers
• Casing Material: 316L stainless steel
• Backplate, Impeller, Stub Shaft: 316 stainless steel
• Adapter Material: 304 stainless steel
• Product Contact Finish: 32 Ra / 150 grit
• Maximum Inlet Pressure: 60 PSI / 4 BAR
• Maximum Viscosity: 1,200 cP
• Operating Speeds: 1450, 1750, 2900, and 3500 RPM
• Certification: 3-A Sanitary Standard 02-10
• Motor Included: No

Frequently Asked Questions

Q: What exactly is included in a PEO kit, and what do I still need to supply?

A: The PEO kit ships as the complete fluid end — casing, backplate, impeller, stub shaft, adapter, mechanical seal, and hardware. You supply the C-face motor in a 210TC or 215TC frame, plus the baseplate or mounting if you are not reusing an existing one.

Q: Can this pump end mount to a motor I already have on the floor?

A: Yes, provided that motor is a TEFC or washdown C-face unit in a 210TC or 215TC frame. The "21T" in the part number is the adapter designation, so any conforming motor in that frame will land correctly on the adapter register.

Q: How does the Type D seal differ from the DG and E options Ampco offers?

A: The Type D is a single external balanced seal suited to most clean and mildly corrosive products. The DG substitutes harder faces such as silicon carbide or tungsten carbide for abrasive media, while the Type E is a water-cooled double seal used for vacuum service and sticky products at elevated temperatures.

Q: Is the seal serviceable in place, or does the pump have to come off the piping?

A: The AC Series uses a backplate-removal design, so the seal can be reached by pulling the backplate assembly while the casing stays clamped to the process lines. That is one of the main reasons plants keep this pump end in their standard maintenance rotation.

Q: Will this replace an older competitor pump end without repiping?

A: In most cases, yes. Ampco engineered the AC Series to match the dimensional envelope of legacy C-Series sanitary pumps, so port centerlines and mounting dimensions generally line up. Confirm your existing impeller trim and motor frame before ordering to be certain the hydraulic duty point carries over.