Armstrong Series AST Pre Charged Tanks

AST Pump Systems and Expansion Equipment

Information:

• Armstrong Series AST ASME Hydro Pneumatic Drawdown Tank Operating Instructions
• Armstrong Series AST ASME Pre Charged Expansion Tank For Potable Water Submittal Sheet

When you work with water-based systems like booster stations, chiller plants, or boiler setups, you need tools that keep things steady. That's where AST pumps come in. We have a full line of Armstrong AST expansion tanks at National Pump Supply. These tanks help keep changes in pressure under control and keep systems from getting damaged. These tanks work well, are simple to set up, and are made to last. Browse our website and choose from a wide range of Armstrong pumps!

Shop Trusted AST Pump Products

We stock the full AST Series from Armstrong, including:

• AST-5 to AST-210 models
• Capacities from 3.5 to 90 gallons
• Pressure rating: up to 125 psi
• Temperature rating: up to 240°F

Every AST pump is pre-pressurized and ASME-certified. That means they’re ready to handle serious pressure without skipping a beat. The internal butyl diaphragm separates the water from the air cushion, keeping system pressure consistent and your equipment safe.

Need something specific? Most models ship within 3–5 business days.

Why Choose an AST Pump?

AST expansion tanks help absorb pressure changes that happen when water heats up or cools down. Without this kind of equipment, your pipes, pumps, and other parts can wear out faster. These tanks reduce water hammer, protect valves, and keep your whole system balanced.

They also pair well with grease removal systems, like the Big Dipper automatic grease trap. So, if you work in a kitchen, restaurant, or any place dealing with grease buildup, AST tanks help keep your system clean and running smoothly.

AST Pump Features at a Glance

• Steel tank shell
• Polypropylene liner for durability
• Heavy-duty butyl diaphragm, FDA approved
• Stainless steel system connection
• Factory pre-charged, adjustable on-site
• Supports drawdown and pressure control

These tanks are made to work hard. Whether you’re running a small commercial boiler or a high-volume pressure system, AST tanks give you the support you need.

AST Pump Timer and System Efficiency

An AST pump timer can help some setups keep cycles steady and keep your system from wearing out too quickly. Timers use technology that can help you better control the drawdown and recharge cycles. Adding a timer can help you work faster and use less energy if you're dealing with sensitive equipment.

We'll be happy to help you decide if this choice is good for you. We're always here to help you through it.

Expert Help, Fast Shipping

Not sure which AST pump is the best fit for your project? That’s what we’re here for. Call our team, and we’ll help you size the tank, pick the right model, and get it shipped fast.

What you get with every order:

• Factory-backed warranty
• Competitive pricing
• Fixed-rate shipping
• Clear lead times
• Expert support from start to finish

All AST equipment is priced per unit and ships within the continental U.S. If your item is delayed or on backorder, we’ll let you know right away.

Get Your AST Pump Today

If you're looking for reliable pressure control, easy installation, and trusted performance, the Armstrong AST Series is a solid choice. Whether you need one tank or a full system of support equipment, we’ve got it in stock and ready to ship.

Call us at 1-800-781-7405 or explore our full product list online. We’ll help you find the right product for your setup—fast, simple, and backed by real support.