FBSTF Series Frame Mount Self-Priming Pump

Technical Product Description:

The Franklin Electric FBSTF Series Frame Mount Self-Priming Pump is a heavy-duty self-priming pump designed for dependable liquid transfer in commercial, agricultural, and industrial applications. Franklin Electric lists the FBSTF under its self-priming frame mount pump category, intended for rugged service where frame-mounted installation and reliable priming performance are important.  

Franklin specifies that the FBSTF Series features a cast iron volute with tapped openings for priming, venting, and draining, supporting easier startup and service access. The pump uses a semi-open cast iron, non-clogging impeller with a blind hole for shaft protection, making it suitable for handling more demanding liquids than a fully closed impeller design.  

The standard seal construction includes carbon/ceramic faces, FKM elastomers, and 300 series stainless steel components. Franklin also notes a one-piece high-strength steel shaft for easy mounting, along with a bearing frame designed for bolt or direct drive, using heavy sealed bearings and a keyed stainless shaft.  

Published Franklin model data for FBSTF pumps shows additional operating details depending on the exact model. For example, the FBSTF-1 listing includes clockwise rotation when facing the shaft, 0.5 inch maximum solid handling size, a 200°F temperature rating, and 212°F maximum fluid temperature. Franklin’s model listings also show examples such as FBSTF-3 and FBSTF-5, both with cast iron pump body construction, semi-open impellers, and mechanical seals. Final ratings and configuration depend on the exact FBSTF model selected. 

Key Technical Features:

• Frame mount self-priming pump design.  
• Cast iron volute with openings for priming, venting, and draining.  
• Semi-open cast iron non-clog impeller with blind hole for shaft protection.  
• Standard seal with carbon/ceramic faces, FKM elastomers, and 300 series stainless steel components.  
• One-piece high-strength steel shaft for mounting.  
• Bearing frame for bolt or direct drive with heavy sealed bearings and keyed stainless shaft. 
• Example published model data includes 0.5 inch solids handling and 212°F maximum fluid temperature on certain versions.