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Chemical Processing

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Key Features
Types of Hastelloy Valves
25 | VENT |
24 | INJECTI0N |
23 | BUSHING |
22 | DRAIN |
21 | KEY |
20 | WORM GEAR ACTUATOR |
19 | PIN |
18 | GLAND FLANGE |
17 | PACKING |
16 | STUFFING B0X |
15 | STEM |
14 | GASKET |
13 | SEAT RING |
12 | BALL |
11 | SEAT RETAINER |
10 | PACKING |
9 | SEAT SPRING |
8 | STUD B0LTS |
7 | NUI |
6 | BONNET |
5 | GASKET |
4 | “0”RING |
3 | TRUNNION |
2 | B0LIS |
1 | B0DY |
NO | PART NAME |


How Does the Hastelloy Ball Valve Work?
- Quick and easy to operate.
- Simple and compact design.
- Available in various sizes.
- Causes low pressure drop.
- Easy to install and repair due to its simple design.
- Quick opening and closing can cause water hammer and overpressure.
- Not suitable for throttling applications.
Hastelloy Plug Valve
A Hastelloy plug valve controls fluid flow using a cylindrical or conical plug with a central hole. The valve opens and closes by turning a handwheel or using an electric or pneumatic actuator connected to the plug by a stem. It’s versatile, accommodating various flow rates and pressure levels due to its range of sizes.


- Simple and compact design.
- Easy to operate.
- Few moving parts, making them easy and affordable to maintain.
- Low resistance to fluid flow, resulting in a low-pressure drop.
- Easy to install, clean, and repair.
- Not ideal for throttling applications.
- Requires high torque to operate.

A Hastelloy check valve is a type of valve that prevents fluid from flowing backward. It’s also called a non-return valve or one-way valve because it only lets fluid flow in one direction. If the fluid tries to flow in the reverse direction, the valve closes automatically. Unlike other valves, a Hastelloy check valve doesn’t have a stem, handwheel, or actuator. It’s designed to open and close on its own based on the fluid pressure.

- Operates automatically.
- More affordable compared to other valves.
- Causes a low-pressure drop.
- Quick to operate.
- Prevents reverse flow.
- Can cause water hammers due to fast closing and opening.
- Not suitable for pulsating flow.
A Hastelloy gate valve controls fluid flow by lifting a component called the gate or disc. When the gate moves down into the seat, it stops the flow of fluid. This type of valve takes up little space along the pipe and doesn’t restrict flow when fully open. It can be operated manually with a handwheel or automatically with an electric or pneumatic actuator, giving users flexibility in how they control the valve.


- Suitable for high-pressure and high-temperature applications.
- Causes a low-pressure drop when fully opened.
- Allows for bi-directional flow.
- Not ideal for throttling fluid flow.
- Slow to operate; the handwheel must be turned several times to open or close the valve.
Hastelloy Globe Valve


- Excellent for throttling fluid flow.
- Faster to operate compared to gate valves.
- Provides a tight seal with no leakage.
- Causes a high-pressure drop.
- Heavier than other types of valves.
Applications of Hastelloy Valves
- Steam Power Plants: Controlling the flow of water and steam.
- Boiler Feed Systems: Managing the flow of water.
- Water Supply: Used in both commercial and domestic water systems.
- Paper and Pulp Industries: Regulating fluid flow in production processes.
- Chemical Processing: Handling corrosive substances and maintaining safe operations.
- Crude Oil Industries: Used in oil extraction and processing.
- Mining: Handling slurries and other abrasive materials.
- Gas and Oil Transportation: Ensuring safe and efficient transport of these resources.
- Agriculture, Food, and Beverage Industries: Maintaining safe and clean operations.
- Pharmaceutical Industries: Used in processes requiring high levels of hygiene.
- Marine Applications: Withstanding harsh marine environments.
- Cryogenics: Operates in extremely low-temperature environments.
- Acid Handling: Safely processes corrosive chemicals in plants.
- Boilers and Steam Systems: Designed for high-temperature and high-pressure resistance.
- Water Supply and Oil Industries: Providing reliable operation in critical infrastructure.
Advantages & Disadvantages of Hastelloy Valves
Advantages
- High Strength: These valves are strong and can handle high pressure and flow rates.
- High Melting Point: The Hastelloy material’s high melting point makes these valves ideal for high-temperature applications.
- Versatility: They can be used in a wide range of industrial applications.
- Corrosion Resistance: Hastelloy is resistant to corrosion, allowing the valve to withstand corrosive and oxidizing environments.
- Ease of Welding: Hastelloy valves are easy to weld, which simplifies installation and repairs.
- Long Service Life: These valves are durable and have a long operational lifespan.
Disadvantages
- Heavy: The high density of Hastelloy makes these valves heavier than others.
- Difficult to Machine: Hastelloy is tough to machine, which increases the manufacturing cost of the valves.
Troubleshooting Hastelloy Valves
- Blocked Pipe: Check the line feeding the valve for any blockages and remove any foreign material.
- Foreign Material Inside the Valve: Disassemble the valve as recommended by the Hastelloy valve manufacturer and clean out any foreign materials.
- Damaged Stem: Repair or replace the valve stem.
- Damaged or Worn-Out Gasket: Replace the gasket.
- High Fluid Pressure: Ensure the valve is used within the recommended pressure range. For high fluid pressure, consider using a valve with a higher pressure rating.
- Loose Connection: Tighten the bolts and nuts connecting the valve to the pipe.
- Worn-Out Seats: Replace the valve seats.
- Worn-Out Disc/Plug/Ball: Replace the disc, plug, or ball as needed.
- Dirt on the Seat: Clean off any dirt from the seat.
- Dirt on the Valve Stem: Clean the dirt off the valve stem.
- Dirt on the Valve Seat: Clean the dirt off the valve seat.
Hastelloy C276 and C22 Valves for Corrosive Petrochemical Applications
Hastelloy valves, particularly in the C276 and C22 grades, are ideal for use in corrosive petrochemical environments. These valves are known for their high resistance to corrosion, extreme temperatures, and their robust tensile strength. They are commonly used in various valve types, including ball, butterfly, gate, globe, check, plug, needle, and custom-made configurations.
Available Configurations
- Ball Valves
- Butterfly Valves
- Cast Valves
- Check Valves
- Control Valves
- Cryogenic Valves
- Custom-Made Valves
- Foot Valves
- Forged Valves
- Gate Valves
- Globe Valves
- Needle Valves
- Plug Valves
- Safety Relief Valves
- Strainers
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Materials and Grades
- Hastelloy C276 (UNS N10276): Known for its exceptional corrosion and temperature resistance, C276 is a standard material for many industrial valves.
- Hastelloy C22 (UNS N06022): This grade has largely replaced C276 due to its enhanced corrosion resistance.
- Hastelloy B2 and B3: These grades offer extremely high corrosion resistance and tensile strength but are challenging to machine.
- A494 CW12MW: The most common cast form of Hastelloy used for valves.
Standards and Codification
- UNS (Unified Numbering System): Hastelloy C276 is listed as N10276, while C22 is listed as N06022. Other related UNS codes include N10665, N10675, and N06455.
- DIN (Deutsches Institut für Normung): Hastelloy grades are also identified under DIN norms, including 2.4617, 2.4600, 2.4602, 2.4819, and occasionally 2.4610.

Material Specification and Equivalents
Cast designation | A494 N7M, CW12MW, CW6M, CX2MW |
ASTM specification | B564 and B622 |
European (DIN) Werkstoff number | 2.4617, 2.4600, 2.4602, 2.4819, 2.4610 |
Unified Numbering System (UNS) | N10276, N10665, N06022, and S33205 |
Specifications
Hastelloy's Unique Properties
- Superior Corrosion Resistance: Effective against various corrosive substances, including phosphorous and sulfuric acids.
- High-Temperature Performance: Maintains excellent mechanical properties at elevated temperatures.
- Resistance to Oxidizing Agents: Withstands strong oxidizing chemicals, making it suitable for demanding industrial processes.
- Erosion Resistance: Capable of withstanding abrasive media, making it durable in tough environments.
Supporting Industry Applications
- Aerospace
- Chemical Processing
- Mining
- Oil and Gas Production
- Petrochemical Industries
- Power Generation and Plants
- Pulp and Paper Production
- Semiconductor Manufacturing
Hastelloy – Your Material Selection
Choosing Hastelloy® for your next valve project depends on the specific needs and requirements of your application. Key factors to consider include the critical nature of the valve’s role, material performance, expected project lifecycle, product service life, and costs, especially when corrosion resistance is a priority.
Important Considerations for Hastelloy® C-276 and Special Materials
- Tubing Collars and Glands: For high-pressure coned-and-threaded connections, these “non-wetted” parts, which do not typically contact the fluid or gas, are usually supplied in 316 stainless steel unless specified otherwise.
- Taper Seal Connections: The inner sleeve of the Taper Seal, a “wetted” part, must match the material of the valve or fitting body. The Taper Seal gland, a “non-wetted” part, is provided in 316 stainless steel unless requested otherwise.
Series HBV Hastelloy® C Ball Valve

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Additional General Insights Here
Specs of Hastelloy Valves
Temperature Ratings
Sizes and Dimensions
Connection Types
Features of Hastelloy Valves
Tight Shut-Off
Hastelloy Valves are designed with a tight shut-off feature. This helps to create a secure seal, preventing leaks and maintaining system integrity. This feature is particularly important in applications where contamination must be avoided.
Non-Magnetic
These valves exhibit non-magnetic properties, meaning they do not attract magnets or create magnetic fields. This is important in sensitive environments where magnetic interference must be minimized, such as certain electronic or medical applications, to avoid disrupting equipment and operations.
Chemical Compatibility
Hastelloy Valves are compatible with a wide range of chemicals. I am impressed by how they can resist damage from acids, alkalis, and other harsh substances. This chemical compatibility makes them suitable for use in chemical plants and other industries that handle reactive substances.
Benefits of Hastelloy Valves
Enhanced Durability
These valves offer enhanced durability, performing well even under extreme conditions such as high temperatures and pressures. This improved durability results in fewer breakdowns and lower maintenance costs, making them a cost-effective choice for challenging applications. If you are looking for the best valves that will give this benefit, choose NTVAL.
Reduced Maintenance Needs
Hastelloy Valves have reduced of frequent preventive measures due to their high-quality construction. This benefit translates to less downtime for inspections and repairs, allowing for continuous operation and lowering overall maintenance costs. This reliability is crucial for industries that rely on uninterrupted processes.
Improved Corrosion Resistance
A major benefit of Hastelloy Valves is their improved resistance to corrosion. This enhancement makes them perfect for industries dealing with harsh chemicals, ensuring the valves maintain their integrity over time and reducing the need for frequent replacements.
Applications of Hastelloy Valves
Power Generation
Chemical Processing
Pulp and Paper Industry
Mining Industry


Considerations When Buying Hastelloy Valves
01
ANSI Class 150-2500
02
Certified API607
03
Epoxy Coatings
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