AP4 CLASSIC HI-TEMP Series

Built For Extreme Thermal Conditions

 

When pumps operate in high-temperature environments, failure isn’t gradual — it’s frequent and disruptive.

Heat accelerates:

• Scaling buildup
• Solids accumulation
• Material wear
• Maintenance frequency
• Operational instability

Conventional pumps often struggle to maintain reliable operation under sustained thermal stress.

AP4 CLASSIC HI-TEMP is engineered specifically for severe thermal applications where heat, harsh chemistry, and difficult fluids create constant operational challenges.

The result:
More runtime. Fewer interruptions. Reduced operational frustration.

 

Why AP4 CLASSIC HI-TEMP

 

Proven

Field-tested in landfill, remediation, condensate, and industrial environments where elevated temperatures, harsh chemistry, and solids routinely push equipment to failure.

Simple

Designed to be cleaned quickly — not constantly rebuilt. Fewer tools. Fewer adjustments. Faster service.

Reliable 

Longer runtimes between maintenance events help reduce downtime, minimize technician intervention, and improve operational predictability in high-temperature conditions.

 

Built to Be Cleaned — Not Constantly Rebuilt

A new standard: Cleaning ≠ Maintenance

For decades, the industry has treated all pump service as “maintenance.”
AP4 CLASSIC HI-TEMP changes that.

It’s engineered to run long with routine cleaning, while rebuilds are infrequent and only performed when truly necessary.

 

Routine Cleaning (Regular, Recommended)

• Removes buildup and keeps the pump running as intended
• Typically takes ~30 minutes
• Performed by site technicians or operators

 

Maintenance / Service / Rebuild (Occasional, Not Routine)

• Addresses true wear, damage, or end‑of‑life components
• Typically takes 1–1.5 hours or more
• Performed by trained technicians or service centers

 

Why this matters

Treating every service event like a rebuild creates unnecessary downtime, increases labor, and can shorten pump life.

AP4 CLASSIC HI-TEMP is built for fast, routine cleaning—not constant teardown.

✅ Recommended: Basic Cleaning Kit

 

What Makes AP4 CLASSIC HI-TEMP Different

 

High-Temp Durability

Specialized materials and high-temperature construction extend operational life in severe thermal environments where standard pumps frequently fail.

Engineered for applications up to 250°F (121°C).

 

Faster cleaning

Designed to be cleaned quickly — not constantly rebuilt.

Most servicing requires only routine cleaning rather than major disassembly, helping reduce downtime and technician labor.

 

Targeted Durability Upgrade

A welded lever pin enhances reliability compared to traditional press-fit designs.

 

Ideal Applications

 

AP4 CLASSIC HI-TEMP is ideal for:

• Landfill leachate and condensate systems
• High-temperature remediation wells
• Industrial process and wastewater systems
• Harsh fluid environments with solids and chemical exposure
• Elevated temperature fluid transfer
• High scaling applications

Pump fittings sold separately.

 

Part of the AP4 CLASSIC Series

 

AP4 CLASSIC HI-TEMP is part of a complete pump lineup built for harsh environments and simplified ownership.

Choosing the right pump

• Standard harsh conditions → AP4 CLASSIC Ultra
• High temperature → AP4 CLASSIC HI‑TEMP
• Extreme solids/fouling → AP4 CLASSIC XTREME
• Controlled flow → AP4 CLASSIC LTD

 

 

Specifications (Summary)

• Maximum Temperature: 250°F (121°C)
• Diameter: 3.6 in (9.1 cm)
• Maximum depth: 250 ft (76 m)
• Air pressure range: 5–120 psi
• Maximum flow: up to 14 gpm (depending on model)

Common Models:
303276C, 303277C, 303276CX, 303312CX

👉 Download the full technical data sheet for complete specifications and compatibility details.

 

 

FAQs

What makes HI-TEMP different from standard Ultra?

HI-TEMP is engineered specifically for severe thermal environments where elevated temperatures accelerate scaling, wear, maintenance frequency, and operational instability.

How long does cleaning vs. rebuild take?

• Cleaning: ~30 minutes
• Rebuild: ~1–1.5 hours (or more depending on condition)

Is HI-TEMP available for severe scaling environments?

Yes. XTREME HI-TEMP configurations are available for applications involving both elevated temperatures and severe fouling or scaling conditions.

 

Get more uptime with less wrench time

• Request a Quote
• Talk to an Expert
• Download the Data Sheet

Engineered & Assembled in Dexter, Michigan, USA.

 

What reliability actually feels like

• Fewer “drop everything” calls
• Less time troubleshooting pumps
• More predictable operations
• Confidence your system is running—even when you’re not there

 

• Proprietary non-stick finishes on float and discharge tube to reduce solids buildup
• 100% air-powered operation
• Corrosion-resistant 316-grade stainless steel metallic parts
• Reliable air control mechanism
• Temperature ratings up to 250 °F, making it ideal for high temperature applications.
• ATEX Certified
• Functions under positive or negative (vacuum) pressure environments
• Does not require clean dry air to function properly and pumps particles up to 1/8 inch in diameter
• The AP4+ air valves can pass 90 weight oil without fouling
• Able to pump products with a specific gravity as low as .72
• 5 Year Warranty

• Increase landfill gas extraction rates
• Reduced risk of liquid leakage through liners and side slope failures
• Lower rates of odors and non-methane organic compounds
• Field tests have shown that the AutoPump® AP4 & AP4.5 Ultra will last up to 10 times longer between service events. Tested in the most severe applications.
• Cleans in up to 50% less time than control group, determined by field tests
• Simple disassembly with no fasteners and no cotter pins
• AutoPumps require no surface timer-based controllers, bubblers or sensors in the well to operate