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How Do I Select A Gas Regulator?

3/16/2018

3 Comments

 
CGA Number Markings on a Gas Regulator
Do you need a gas regulator but aren't quite sure which type you need? This guide will outline the basic information you'll need to purchase the correct one for your application.
 
Single Stage vs. Dual Stage
Single stage regulators reduce pressure in a single step to deliver a pressure within a specific range. Regulators designed in this way will show a slight variation in delivery pressure as the cylinder pressure falls during use. For this reason, single stage regulators are best suited for applications where a constant outlet pressure is not critical, where an operator can monitor and readjust pressure, or where inlet pressure is constant. Dual stage regulators perform the same function as single stage regulators. However, delivery pressure remains constant as cylinder pressure decreases, and greater accuracy in pressure control is maintained because the pressure reduction is performed in two steps. Dual stage regulators are recommended for applications requiring a constant outlet pressure over the life of a gas cylinder.
 
Materials of Construction
The materials of construction for a regulator should be selected based on the properties and purity of the gas being used. Regulators are typically made from brass, aluminum, and 316L stainless steel. Brass is compatible with most of the non-reactive gases. A choice of forged body or barstock construction is available. Forged body regulators are economical; however, their internal surface finishes are relatively rough as compared to barstock body regulators. Barstock body regulators have all wetted surfaces machined to a smooth finish, which reduces the possibility of contamination. 316L stainless steel is highly corrosion resistant and is suitable for use with many of the highly corrosive gases in their anhydrous form. Aluminum is an economical lightweight alternative to stainless steel for many of the mildly corrosive gases. Consult Earlbeck Gases to determine suitable materials of construction.

Cylinder Connections
In the US, the Compressed Gas Association (CGA) has designated specific cylinder connections for each gas service and pressure rating. Refer to CGA publication V-1 for more information. Please note that a CGA connection limits the temperature range of a regulator to the guidelines of the connection.
Once you have determined your gas’s CGA number, you will use the corresponding CGA on your gas cylinder. CGA numbers are typically (but not always) stamped on the regulator just above the threads of the cylinder connection. Click here for our printable guide of the common outlet CGA numbers.
 

Specific Applications
While a single or dual stage regulator of the appropriate material will suffice in most gas services, some applications require specially designed regulators.  If you are unsure about your requirements, please contact Earlbeck Gases for assistance.

3 Comments
Lincy link
4/30/2019 04:11:29 am

Choosing the regulator that fits into gas nob is a hectic task. This post helps me to select the best gas regulator. Thanks for sharing the informative post.

Reply
Metal Fabrication Fort Collins link
6/10/2021 07:07:46 am

Very interesting and thanks for sharing such a good blog. Your article is so convincing that I never stop myself from saying something about it. You’re doing a great job. Keep it up.

Reply
Iris Smith link
8/25/2022 07:55:59 pm

My house's home heating and hot water heaters are both powered by gas. I like how you underline that while most gas services may be served by a single or dual-stage regulator made of suitable material, other situations call for specifically built regulators. I'll contact the propane tank installation business to determine the correct regulators for my system.

Reply

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  • Products & Services
    • Fronius Welding Products
    • Welding & Cutting Equipment >
      • Free Welding Productivity Analysis
    • Welder Rentals & Repairs
    • Engineering
    • Machine Tools
    • Welding & Cutting Automation
  • Gases
    • Free Gas Application Analysis
    • Industrial & Welding Gases
    • Bulk & Microbulk Gas
    • PurityPlus Specialty Gases
  • Welder Training
    • Program Overview >
      • Fundamentals of Welding
      • Intermediate Welding >
        • Intermediate Stick
        • Intermediate TIG
        • Intermediate MIG >
          • Intermediate GMAW - Aluminum
          • Intermediate FCAW Self Shielded
          • Intermediate GMAW - Stainless Steel
      • Advanced Welding >
        • Advanced Stick
        • Advanced TIG
        • Advanced MIG
      • Welding Basics
      • Custom Classes & Open Practice Time
    • Pricing and Class Schedule
    • How to Register
    • Tour Our Facility
    • Why Earlbeck Technical Center
    • On Site Training
    • Frequently Asked Questions >
      • Are student loans, financial aid, or scholarships available?
      • How long does it take to complete the program?
      • Do you offer job placement?
      • How Much Money does a Welder Make?
      • What is the Job Outlook for Welders?
      • What should I bring for my first day of class?
  • Weld Testing
    • Welder Certification
    • Send In Weld Testing
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    • Frequently Asked Questions >
      • How much does a welding certification cost?
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      • Does a Welding Certification Expire?
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      • What Welding Certification Do I Need?
      • Why Should I Become a Certified Welder?
  • Welding 101 Blog
  • Locations & Contacts
    • Baltimore, MD
    • Beltsville, MD
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    • Southern MD Welding School
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