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How to Change an Itron B34 Regulator Orifice?

by | on | in Measurement and Control of Natural Gas | 1 Comment

In the following article, we answer, "How do I change my Itron B34 regulator orifice? Of course, these instructions apply to all Itron B34: R, N, M, and D natural gas regulators. In addition to the Itron guidelines, it is important to adhere to your company's procedures.

B34 Natural Gas Regulator

The Itron B34 Regulator is ideal for many commercial and industrial burners, gas engines, boilers, and furnaces. The B34's fast response makes it well-suited for mid-range applications where quick on/off loads cause shock difficulties. The unit is reasonably priced and provides versatility to meet challenging applications. Itron gas regulators offer the highest level of safety with available internal monitor and relief options to control gas flow.

How to Change an Itron B34 Orifice?

  1. Itron B34 regulator orifice change instructionsLocate and remove the two bolts holding the diaphragm case to the valve body.
  2. Carefully pull the diaphragm case away from the valve body. Inspect the valve seat, valve body and valve body gasket for any debris, damage, or deterioration. Replace the valve body gasket.
  3. Note the loading ring's position. The loading ring must be replaced in the same position. Use a marker to indicate the position of the loading ring's notch on the valve body (see the Figure 1).
  4. Place your thumbs in the neck of loading ring. Gently open the loading ring and remove (see Figure 2).
  5. Remove the orifice using a 1-7/16-inch thin-wall socket wrench.
  6. Apply pipe thread sealant (Rector Seal #5) on the orifice threads. (See Figure 3.) Begin threading the orifice by hand, using the ratchet to finish tightening. Torque to 600 inch-pounds. Do not over-tighten the orifice. Warning: Over tightening the orifice can cause irreparable damage. Torque to 600 inch-pounds.
  7. Replace the loading ring to its original position. Verify the orifice retention beads seat against the orifice.
  8. Reattach the diaphragm case to the valve body. Tighten the bolts in an alternating fashion; tighten each bolt one-half way. Tighten both screws completely; torque to 100-inch pounds.
  9. Slowly pressurize the system. Verify the regulator locks up and regulates properly.

For the recommendation of tools and parts needed and the loading ring position, download the Itron instructions.

Images and information courtesy of Itron Gas Regulator.

Blog posted from 11919 W Interstate 70 Frontage Rd N #109, Wheat Ridge, CO 80033, USA View larger map
Tagged in: Itron
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About The Author

Tom is a former engineer for Xcel Energy, where he designed gas meter and regulator applications. He has also worked for mechanical contractors and engineering firms approving gas meters and regulators in various applications. He currently manages the Linc Energy Meter and Regular Department and is working on flare gas measurement.

Comments

  • Guest
    Tps Technology Thursday, 27 September 2018

    Thanks a lot for posting this post, Your post has always been an informative source for me.
    Air Compressor

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