STP-SS1550N | 3.96 GPM 7250 PSI Pump 1450 RPM SS Head Industrial

STP-SS1550N | Industrial Triplex Plunger Pump — 3.96 GPM, 7,250 PSI, 1,450 RPM

The STP-SS1550N is a low-speed, industrial-grade triplex plunger pump engineered for
extreme-pressure cleaning applications where durability, chemical resistance, and long service life
are critical. Rated at 3.96 GPM and an impressive 7,250 PSI at just
1,450 RPM, this pump is purpose-built for continuous-duty operation in demanding
commercial and industrial environments.

Designed and supported by AR North America, the STP-SS1550N features an
AISI 420 stainless steel head, ceramic plungers, and heavy-duty internal components that
deliver reliable performance under high load while minimizing wear, vibration, and heat buildup.
Its slow-speed operating profile makes it an excellent choice for systems that prioritize longevity
and reduced maintenance intervals.

System Role

Industrial Cleaning Performance

• Industrial-duty triplex plunger pump delivering 3.96 GPM at 7,250 PSI for extreme-pressure cleaning applications.
• Low-speed 1,450 RPM design reduces friction, heat generation, and mechanical stress for continuous-duty service.
• 24 mm solid keyed shaft supports flexible integration with belt-drive and direct-coupled motor systems.
• Stainless steel head and ceramic plungers provide excellent resistance to corrosion, chemicals, and thermal cycling.

Key Specifications

Ratings & Configuration

• Model: STP-SS1550N
• Flow Rate: 3.96 GPM
• Maximum Pressure: 7,250 PSI
• Operating Speed: 1,450 RPM
• Shaft: 24 mm solid keyed shaft
• Pump Head: AISI 420 stainless steel
• Plungers: Solid ceramic
• Connecting Rods: Bronze, heavy-duty design
• Bearings: Oversized for continuous-duty operation
• Warranty: 5-year limited commercial warranty

What’s Included

Factory Provisioning

• Factory-installed break-in oil in the crankcase.
• Integrated oil sight glass for fast visual inspection.
• Vented dipstick to support proper crankcase ventilation.
• User manual and detailed schematic diagrams.
• Factory performance test data verifying PSI and GPM output.
• 5-year limited commercial warranty with U.S.-based technical support.

Operation

Triplex Plunger Design

• Triplex plunger configuration delivers smooth, consistent flow at ultra-high pressure.
• Ceramic plungers resist heat, abrasion, and chemical attack while extending seal life.
• Low-speed 1,450 RPM operation significantly reduces internal temperatures during long run times.
• Bronze connecting rods and oversized bearings maintain stability under extreme pressure loads.

Durability

Materials & Wear Control

• AISI 420 stainless steel head provides excellent corrosion resistance in aggressive wash environments.
• Ceramic plungers support long service intervals in high-pressure, high-temperature applications.
• Bronze connecting rods reduce friction and support smooth power transfer.
• High-grade sealing system maintains pressure integrity under continuous thermal cycling.
• Heavy-duty bearings are sized for extended continuous-duty industrial operation.

Operational Benefits

Why Choose the STP-SS1550N

• 7,250 PSI output delivers exceptional cutting power for the most demanding cleaning tasks.
• Stainless steel construction supports sanitation-focused and chemical-intensive wash programs.
• Low-speed design minimizes vibration, extending pump and drive component life.
• Service-friendly features reduce downtime and simplify routine maintenance.
• Backed by a 5-year limited commercial warranty from AR North America.

Typical Applications

Industrial & Commercial Use Cases

• Food processing and sanitation systems requiring stainless components.
• Chemical plants, tank farms, and industrial washdown operations.
• Manufacturing facilities and heavy equipment maintenance.
• Mobile wash trailers and high-pressure service rigs.
• Fleet maintenance and fire equipment cleaning systems.
• Public sanitation, infrastructure cleaning, and specialty surface restoration.
• Graffiti removal, gum removal, and extreme-pressure surface prep.

STP-SS1550N Summary

The STP-SS1550N triplex plunger pump combines 3.96 GPM flow,
7,250 PSI pressure, and a 1,450 RPM low-speed design into a rugged,
industrial solution built for longevity and performance. With its AISI 420 stainless steel head,
ceramic plungers, and heavy-duty internal construction, it is an ideal choice for operators who
demand extreme pressure capability without sacrificing reliability or service life.