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Superlok Compression Check Valves

Available Product Series


One Piece Check Valves | Fixed Cracking Pressure

  • 3,000 PSI Rated
  • 0.3-25 PSI Cracking Pressure
  • 1/4 and 1/2" NPT
  • 316L Stainless


One Piece Check Valve With Adjustable Cracking Pressure

  • 3,000 PSI Rated
  • 3-600 PSI Cracking Pressure
  • 1/4" and 1/2" NPT
  • 316L Stainless


3K PSI Poppet Check Valve

  • Up to 3,000 PSI
  • 0.3 - 25 PSI Cracking Pressure
  • 1/8" - 1" Compression and NPT
  • 316L Stainless


6K PSI Poppet Check Valve

  • Up to 6,000 PSI
  • 0.3 - 25 PSI Cracking Pressure
  • 1/8" - 1" Compression and NPT
  • 316L Stainless

Series Information

Superlok Tube End Check Valves

Looking for the perfect adjustable or non-adjustable check valve for your applications? Mako Products has the Superlok ball check valve or inline check valve you're looking for. Our Superlok check valves bring the same precision, durability and reliability you have come to expect from all of our Mako Products.  Our Superlok i-Fitting tube end check valve is a superior product, even among stainless steel tube end check valves, for its durability, precision and effectiveness. That's what makes us your go-to North American source for premium, reliable goods like check valves.

  • Patented I-Fitting Gauge Rings Installed for Precise Connection
  • Every Valve Nitrogen Pressure Tested
  • Superior Quality and Reliability
  • Single and Double Ferrule
  • 316 Stainless Steel

What Is a Check Valve?

A check valve is a one-way valve designed to allow fluid, like liquid or gas, to pass from one tube to another in a specific direction. There are a variety of ways a check valve can be designed to prevent reverse flow and allow the easy transmission of fluid. They are designed with two ports, one for the fluid to enter and the other for it to exit. There are a variety of types of check valves, including ball check valves, which use a ball to block reverse flow, and inline check valves which work using a pressure activated spring.

Check valves are used in a great range of industries and applications, including chromatography pumps, chemical plants and even waterslides. You'll also find tube end check valves in sprinkler systems, petroleum and gas extraction, heating systems and even in aerospace and defense applications. These are extremely useful pipe valves with a wide variety of uses. Our Superlok check valves are suitable for any application where you would ordinarily use a check valve.

If you already have tube end check valves in your system, you can easily replace them with Superlok, as our products are completely interchangeable with major brands like Parker, DK-Lok and Swagelok.

Why Superlok Check Valves Are The Better Choice

Your Superlok check valve will give you benefits you don’t see in every check valve. We hold our Superlok check valves to incredibly high standards, so you can enjoy superior reliability and quality with every valve. Each valve is nitrogen pressure tested to 1,000 PSI to ensure quality in our single or double ferrule formats. Our 316 stainless steel tube end check valves are carefully inspected to make sure they meet our high bar for valve quality. You can be confident that any tube end check valves will be a dependable, high-efficiency product.

Most importantly, Superlok check valves from Mako Products feature the patented i-Fitting red ring seal verifier. This feature means you never have to worry again about whether your check valves are properly tightened or not. Simply insert the valve and tighten until the red ring pops off. Once that happens, you’ll know your check valve is perfectly tightened. No need to worry about leaks from under-tightening or stress on the system from over-tightening.

This feature can save you and your company a tremendous amount of money, as it can virtually eliminate leaks in your system. It can also help your system reduce wear and help you avoid worker accidents. You don’t have to worry about failed connections, and you won't keep tightening until the point that it compromises the integrity of the system. You’ll know exactly when to stop tightening with our Superlok tube end check valves. It is the safest and most efficient check valve on the market and there's no substitute for having perfectly sealed tube valves and fittings throughout your tubing network.

Take a look at some of our most popular Superlok check valves and fittings, as we have a wide range of sizes, shapes and types, and the right check valves for you are sure to be in our inventory. If you can't find the check valve you are looking for, just ask, and we will do our best to accommodate you.

Learn More About Superlok Check Valves and Other Efficient and Reliable Mako Products

If you need more information about the various types of Superlok check valves and other valves we offer, we have knowledgeable staff on-hand to help you determine which of our valves and fittings are right for you and your business. To learn more or to order valves, contact Mako Products now, your best USA source for trustworthy Superlok products.


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Local: 405-509-2665
Toll Free: 1-844-200-MAKO (6256)


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