Category Archive: News

Product Spotlight: Maxpro’s High Pressure Relief Valves

Pressure relief valves are intended to protect system components from over pressurization. The pressure relief valve is often set at 10% over maximum system operating pressure to allow the system to operate up to the maximum working pressure rating. The maximum allowable working pressure for the system is based on the lowest rated system component. The size must be chosen to allow the rate of relief flow to equal or exceed the potential various sources of over pressurization. Materials of construction must be chosen to be compatible with the fluid or gas that will be encountered. Poor material choices could lead to faulty operation of the relief valve and failure to relieve overpressure as intended.

Features of MAXPRO®’s High Pressure Relief Valves

High Pressure Relief Valves

Proportional high pressure relief valves from MAXPRO® are designed with simplicity in mind. The goal is to support long term reliability, performance, and serviceability, while providing the safety relief valve function. The relieving function is accomplished by an adjustable spring force acting upon a stem that presents two unequal areas for inlet pressure to act upon, causing stem lift off the seat. The higher the spring force, the higher the relieving pressure. With the proportional relief valve design, higher system pressure causes higher stem lift, resulting in higher relieving flow. This “unbalanced stem” design also provides for smoother operation over those that simply lift from the stem area under the seat and minimizes the reseating pressure window as well as hysteresis of the set pressure. These valves are not poppet style relief valves. At a preset pressure, poppet style relief valves “pop” full open for maximum flow, and then snap closed at some reseating pressure. Poppet style valves tend to be more complex to achieve the pop-open action.

MAXPRO® offers proportional relief valves with four minimum/maximum set pressures to support most applications. Choose from:

Note: The sensing pressure enters the side port and exits the bottom port. MT3RV and MT10RV have two standard side ports. The second port can be for a tee for a gauge or vent line, or the extra side port can be plugged if preferred. MT25RV and MT66RV have one sensing port.

Speak to a MAXPRO® Engineer

Please contact us today to discuss your overpressure protection application with one of our helpful engineers.

How to Choose the Right High Pressure Valve for Your Application

MAXIMATOR high pressure valves are designed to safely operate at pressures of 15,500 psi for a 1-½” medium pressure valve up to 101,000 psi for an Ultra-High Pressure Valve. High pressure valves are used to regulate flow in various fluid handling operations across a wide range of industries, including aerospace, automotive, military, and mining industries. Selecting the best, high pressure valve for your application is crucial.

There are many factors to consider when choosing a high pressure valve. Below, we highlight some key factors to consider when choosing the right high pressure valve for your application.

Factors to Consider When Evaluating Your High Pressure Valve Needs

Important factors to consider when evaluating whether a particular high pressure valve is right for your fluid handling application include:

  • Process medium: The valve should be able to handle the process medium, whether it is in gas, liquid, or steam form, inert, abrasive, or corrosive, and hot or cold.
  • Pressure rating: It should be rated to handle the range of pressures expected in operation. Consider upstream and downstream pressure for the maximum, normal, and minimum flow rates.
  • Temperature: The valve should be rated to handle process medium temperatures.
  • Flow rate: A high pressure valve should be properly sized to ensure it has the proper flow rate capacity.
  • Connection type and size: It should have a connection type and size that fits the inlet/outlet piping.
  • Valve style: Do you need a manual valve or an air actuated valve? If air operated, should the valve be air-to-open (normally closed) or air-to-close (normally open)?
  • Construction material: A high pressure valve should be constructed of material that can withstand the process medium and operating conditions (temperature, pressure, flow, etc.). For example, stainless steel is suitable for fluid handling operations involving corrosive materials.
  • Application: It should be appropriate for implementation in the system.

High-Pressure Valve Solutions at MAXPRO®

At MAXPRO® Technologies, our MAXIMATOR® line encompasses a range of manual and air-actuated valves. Key features include:

  • Non-rotating, rising stem design
  • 316 stainless steel wetted parts with 17-4 PH stainless steel stem
  • Metal-to-metal seating for bubble-tight shut-off
  • Optional reversible and replaceable valve seat is available

Combined, these features result in durable and long-lasting valve solutions for repeated open and close cycle operations. Our air-actuated valves come with a piston-style air actuator that is normally closed or normally open. This design offers even better operation and service life. Additionally, mounting the actuator on a yoke keeps it separated from the process fluids, which helps with stem position indication and stem replacement.

Our MAXIMATOR® line includes:

  • Medium-pressure needle valves: rated to 22,500 psi and available in 1/4″, 3/8″, 9/16″ 3/4″, and 1″ connection sizes. 1-½” valves are rated to 15,500 psi
  • High-pressure needle valves: rated to 65,000 psi and available in 1/4″, 3/8″, and 9/16″ connection sizes
  • Ultra-high-pressure valves: rated to 101,000 psi and available in 1/4″, 5/16″, 3/8″, and 9/16″ connection sizes

Both our medium-pressure and high-pressure valves are available with six body patterns:

  • 2-way straight
  • 2-way angle
  • 2-way angle with replaceable seat
  • 3-way/2-on-pressure
  • 3-way/1-on-pressure
  • 3-way/2-stem manifold

Contact the High Pressure Equipment Experts at MAXPRO Today

Need high pressure valves for your fluid handling operations? Turn to the equipment experts at MAXPRO®! We stock a broad selection of quality valves, fittings, and tubing for many high pressure applications. For more information about our MAXIMATOR high pressure valves, fittings and tubing , contact us today or request a quote.

Factors Involved in Air Amplifier Design

Air amplifiers are industrial equipment designed to increase air pressure to improve pneumatic tool operation.  When centralized air pressure systems are insufficient to power air-driven tools, air amplifiers can fill localized demand. Depending on the type of unit, air amplifiers have various pressure and flow capabilities, ranging anywhere from 30 to 4,350 PSI. Because there is such a wide selection of air amplifier designs available on the market, it is important to carefully select the right one for your intended application.

Air Amplifiers

How Air Amplifiers Work

Air-driven air amplifiers use the principle of differential areas to generate pressure. By having a higher ratio of inlet to outlet piston areas, air amplifiers utilize shop air, use some of that air as power to operate the unit (called the ‘drive air’), and intensifies the remainder of the inlet air into pressurized output. Shop air utilizes a four-way spool valve to affect cycling, then exhausts the drive air.  There are two main ways MAXPRO® Air Amplifier Systems achieve this:

  1. DLA Series:  A large air piston drives a smaller air piston to generate higher pressure levels.
  2. PLV Series:  These units have two fixed area pistons.  During cycling, the air amplifier utilizes one of the pistons to effectively double the incoming air pressure.

MAXPRO® air amplifier systems include an air control package, the amplifier, air storage tank with drain valve, pressure relief valve and outlet pressure regulator with gauge.

Sizing Air Amplifiers

Consider these factors as you determine the right air amplifier for your application:


Airflow demands are based on the application, environment, and specific equipment involved in each case.  Parameters to consider:

  • Available inlet air drive flow and pressure
  • Required outlet pressure
  • Required flow at outlet pressure

Applications Requirements

  • What is the highest flow and pressure needed?
  • Describe typical machine cycle requirements


It is crucial to figure out the highest and lowest air pressure requirement.  Remember you will need to store up higher pressure than is needed to provide the delta P needed for airflow.

Other Considerations

  • Duty Cycle (Intermittent demand or 24/7 operation?)
  • Environment (hot, cold, inside, outside, clean, dirty?)
  • Future expansion of production line (will more volume be needed in the future?)
  • Future need for higher pressure and flow?
  • Distance to work (line lengths can become a factor for pressure and flow)

Air Amplifiers From MAXPRO

At MAXPRO, we have concentrated on helping our clients find the right air amplifiers and air amplifier systems for over 25 years. Customer service is our top priority.  Our knowledgeable engineers and sales staff are ready to help you select the best MAXPRO Air Amplifier System for your requirements.  Contact us today to learn more about our inventory or browse our catalog online.

Maxpro Resource: Air Amplifiers & How They Work


New Setting Up a Pressure Test Cube Video Available

Setting Up a Pressure Test Cube Video Available!

Setting Up a Pressure Test Cube

Learn to assemble a high pressure coned and threaded connection using a MAXPRO® Power Cube, Data Logger and custom-made coned and threaded tubing nipple made from in-stock tubing.

To see more of our videos, click here.

Our Coning & Threading Video

Our Coning & Threading Video is now available in Chinese & Japanese!

The video is also available in Arabic, French, German and Spanish!

Please check them out below or click here for more of our videos!

Maxpro Coning and Threading Machine

Coning and Threading Machine Video in (Arabic)

Coning and Threading Machine Video in (Chinese)

Coning and Threading Machine Video in (French)

Coning and Threading Machine Video in (German)

Coning and Threading Machine Video in (Japanese)

Coning and Threading Machine Video in (Spanish)

Custom Burst Test System Video

Custom Burst Test System Video Available!


Custom Burst Test System

Custom Burst Test System featuring GoPro® footage of high-pressure sample bursting. This system features the GX60 Maximator® Liquid Pump.

To see more of our videos, click here.