BLACKMER STX3 3″ Stainless Steel Sliding Vane Truck Pump 250 GPM 175 PSI

Item Specifications

Blackmer’s current specifications confirm the STX3’s 85–250 GPM capacity, 300–800 RPM operating range, 125 PSI differential pressure, 175 PSI MAWP, stainless construction and approximately 132-lb weight.

Complete  Description

The Blackmer STX3 is a heavy-duty 3-inch stainless steel positive-displacement sliding vane truck pump engineered for high-performance bulk liquid transfer and tanker unloading applications.

The pump uses Blackmer’s sliding-vane technology, in which the vanes automatically compensate for normal wear. This helps maintain flow performance over the service life of the pump while reducing maintenance requirements.

Its 316 stainless steel construction, external ball bearings, non-metallic Duravanes, PTFE elastomers and chemical-duty mechanical seals make the STX Series suitable for demanding liquid-transfer applications where corrosion resistance and product compatibility are important.

The STX3 also provides excellent self-priming and line-stripping capabilities. The sliding-vane design permits short periods of dry operation and helps recover more product from transfer lines at the end of an unloading cycle.

Key Features

• Heavy-duty 3″ sliding vane truck pump
• Positive displacement design
• 316 stainless steel construction
• Maximum flow up to 250 GPM / 946 LPM
• Handles liquids up to approximately 4,250 cP
• 300–800 RPM operating speed
• Up to 125 PSI differential pressure
• 175 PSI maximum working pressure
• Blackmer non-metallic Duravanes
• External ball-bearing design
• Chemical-duty mechanical seals
• PTFE elastomers
• Excellent self-priming capability
• Excellent line-stripping/product-recovery capability
• Capable of short-duration dry running
• Vanes automatically compensate for wear
• Vanes can be serviced without completely removing the pump
• Double-ended shaft permits clockwise or counterclockwise operation
• Adjustable relief valve provides overpressure protection
• Versatile STX3 mounting bracket
• Designed for reliable, high-volume truck and bulk-transfer service

Typical Applications

The STX3 is well suited to tank trucks and trailers, bulk liquid loading/unloading, chemical distribution, industrial liquid transfer and mobile pumping systems. Its stainless-steel wetted construction is particularly useful where corrosion resistance and product purity are important.

The STX platform is also offered for Diesel Exhaust Fluid (DEF) service. Blackmer specifically documents the STX3-DEF for DEF transport, where stainless construction helps prevent contamination and withstand the corrosive nature of the fluid.

Important: For chemicals or specialty fluids, the buyer should confirm material, seal and elastomer compatibility with the exact liquid before operation.

Product details

Part / SKU	STX3

Package includes

• BLACKMER STX3 3" Stainless Steel Sliding Vane Truck Pump 250 GPM 175 PSI

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.