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FLOMAX® 35 SS | 4" x 3" Self Priming Pump

The FLOMAX 35 SS is a high‑performance, heavy‑duty self‑priming centrifugal pump engineered to handle aggressive and corrosive fluids with exceptional reliability. Manufactured from robust 316 stainless steel, it offers superior chemical compatibility and long-term durability, making it an ideal choice for demanding agricultural, industrial and marine applications.

Product Overview

The FLOMAX 35 SS is designed as a self‑priming centrifugal pump capable of achieving rapid and consistent priming even under challenging suction conditions. Its 4" NPT suction flange and 3" ANSI 150# discharge flange facilitate high-volume fluid handling with minimal flow restriction, enabling flow capacities up to 500 GPM.

The pump casing and impeller are made of premium 316 stainless steel, providing outstanding resistance to corrosive chemicals and harsh environmental exposure. The semi‑open, dynamically balanced impeller ensures smooth hydraulic performance, reduced vibration and lower wear, contributing to the pump’s long service life.

A standard mechanical seal – constructed from carbon, ceramic, Viton and stainless steel – delivers dependable sealing performance under elevated temperatures and aggressive media. Optional sealing configurations allow adaptation to more specialized operating environments.

A key advantage of the FLOMAX 35 SS is its installation flexibility. It can be configured for close‑coupled mounting to NEMA “C” frame electric motors, engine drive systems or pedestal‑mounted setups. The PumpPak configuration offers a preassembled pumping unit designed for quick attachment to standard motors, minimizing installation time and downtime in the field.

The pump is ABS Type Approved, validating its suitability for marine and offshore applications that demand strict compliance with industry standards. The FLOMAX 35 SS combines high flow capability, rugged construction and easy serviceability, making it a highly reliable solution for diverse fluid‑handling operations.

Features and Benefits

Key Features

  • 316 stainless steel construction for superior corrosion resistance
  • Self‑priming capability for reliable operation in variable suction conditions
  • Semi‑open, balanced impeller design for smooth hydraulic performance
  • Standard Viton flapper and priming chamber fill plug
  • 4" NPT suction and 3" ANSI 150# discharge flange
  • Standard carbon/ceramic/Viton mechanical seal
  • Multiple drive options including electric motor, engine, pedestal and PumpPak
  • ABS Type Approved for marine applications

Benefits

  • High durability in aggressive fluid environments due to premium stainless‑steel build
  • Reduced maintenance thanks to reliable sealing and balanced impeller design
  • Easy installation and integration with various drive systems
  • Operational versatility for agriculture, industrial processes and marine systems
  • High flow performance up to 500 GPM for demanding pumping tasks
  • Improved uptime with quick‑connect PumpPak configuration

Specifications

 

Suction / Discharge 

Suction: 4" NPT 

Discharge: 3" NPT 150 # Class Flat Flange 

Materials of Construcion Cast Iron & Stainless Steel 
Flow Up to 500 GPM (113.6 m3/h) 
Impeller 316 SS, Semi-Open, Balanced 
Seal Carbon/Ceramic/Viton 
Drive Options 

Close Coupled 184TC 

Close Coupled 256TC 

Close Coupled 284TSC 

Close Coupled 286TSC 

Engine 

Electric Motor: -256TC -286TSC 

Pedestal 

PumpPak (without motor)