ANSI Valves

ANSI Certified Valves Features

Our ANSI ISA/ASME-certified valves feature ANSI standard-size flanges, with standard face-to-face dimensions. With these new ANSI valves, users can bolt right up without the use of DIN mating flanges or companion flanges for ANSI piping.

As mentioned earlier, the new models 365 and 367 ANSI ISA-certified valves are available in 150# and 300# valve pressure classes, and are used within a wide range of applications, including those involving:

• Hot oil
• Steam
• Water
• Energy

Baelz ANSI valves are available in two different configurations:

Stainless Steel Bellows Valve With Cooling Tube

(365/367-BK/BBK-SS)

• These valves are designed for use in higher temperature ranges, with a maximum temperature of 343 ºC, or 650 ºF.
• These stainless steel components allow for extended life spans of the valves seals and can handle 150,000 reps up and down at 300 ºC.

Non-Bellows Seal Valves

(365/367-B/BB)

• These valves have a maximum temperature of 232 ºC, or 450 ºF.
• This model does not feature the stainless-steel bellows or extended cooling tubes as mentioned in the previous model.

Click to view our ANSI Valves infographic

ANSI Valve Standards: Sizing

All ANSI-certified valves follow standard specifications regarding sizing, such as: 

• Flange dimensions
• Face-to-face dimensions
• Flange bolt patterns (for connection to ANSI standard piping)
• Pressure requirements
• Valve body material 

Each of these valve sizing aspects must be in American standard measurements (inches, psi).

ANSI Valve Standards: Factory Testing

The structural integrity of every Baelz ANSI-certified valve is factory tested to ensure durability and leak proof, according to the stringent testing requirements defined by ANSI.

The valves are tested with a liquid that may consist of water, water with an added corrosion inhibitor, or other approved liquids with similar specific gravity. Pressure and time testing parameters are dependent on the type of material the valve is constructed from, nominal valve size, and the valve’s classification.

In order to pass all tests, a valve needs to:

• Display no visible leaks on the valve body during the hydro testing process
• Allow no leaks at the flanges, the stem, or any other part of the valve that must hold pressure.
• Valve function has no impairment during testing

ANSI Valve Standards: Tag Placement / Marking

The ability to identify a valve’s specification is crucial in the industrial field. Such information may include:

• Manufacturer
• Materials of construction
• Nominal diameter
• Pressure rating designation
• All internal components

A valve tag that is visible to help identify this information is very valuable during maintenance, upgrade, replacement, or when taking count of equipment inventory. For this reason, ANSI requires the placement of valve identification tags on the face of the b-port flange.

Benefits of ANSI/ISA Certification

Using ANSI-certified valves ensures that every valve will support the required temperature, flow, and pressures. Valve standardization also means that valves are easily replaced, or that repairs and upgrades can be performed with limited delay and downtime.

ANSI Certified Valves from Baelz North America

To learn more about our new ANSI ISA-certified valves, download the technical guides for the 365 and 367 valves. And for more information on Baelz valve offerings, or to discuss your options with an expert, contact the team today.