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Anti-Vortex Plate According to NFPA 20 & 22

Anti-Vortex Plate According to NFPA 20 & 22

Anti-Vortex Plate According to NFPA 20 & 22
Anti Vortex Plate According to NFPA 20 & 22

When to install "Anti-Vortex Plate"?:

  • Where a tank is used as the suction source for a fire pump, the discharge outlet of the tank shall be equipped with an assembly that controls vortex flow.

Purpose of using "Anti-Vortex Plate"?:

  • Anti-Vortex plate is installed in the suction line of fire pumps to control the turbulence in a flowing water, They are simple in design and very effectively controlling the velocity of the fluid thus preventing cavitation to fire pumps and damage to impellers.
Dimensions of "Anti-Vortex Plate"?:

  • The assembly shall consist of a horizontal steel plate that is at least twice the diameter of the outlet on an elbow fitting.
  • Large, standard size anti-vortex plates [48 in. X 48 in. (1219 mm × 1219 mm)] are most common and are desirable, as they are adequate for all sizes of fire protection pump suction pipes normally used.

Installation dimensions:

  • Mounted at the outlet a distance above the bottom of the tank equal to one-half the diameter of the discharge pipe or 152mm whichever is greater.

Anti-Vortex Plate Inspection:

  • Inspection of anti-vortex plate shall be after completion of the tank construction, and before filling the tank with water.
  • The inspection shall verify that the horizontal steel plate and long radius elbow are installed properly and meet the requirements of dimensions and installation height mentioned above.

Below are illustration for installation of anti-vortex plate for various types of tanks according to NFPA 22 (Standard for water tanks for private fire protection):



Anti-Vortex Plate
Anti-Vortex Plate


Anti-Vortex Plate
Anti-Vortex Plate


Anti-Vortex Plate
Anti-Vortex Plate


References of this article:

- NFPA 20 (Standard for the installation of stationary pumps for fire protection)
- NFPA 22 (Standard for water tanks for private fire protection)


Anti-Vortex Plate According to NFPA 20 & 22
Fire Protection Specialists
Keeping You Up To Code

28 comments:

  1. Hwo much this item antivortex plate

    ReplyDelete
    Replies
    1. It depends on your location, if in Egypt or gulf area, contact via: info@fps-eg.com

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  2. Wow, cool post. I'd like to write like this too - taking time and real hard work to make a great article... but I put things off too much and never seem to get started. Thanks though. nagapoker

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  11. How effective is anti vortex plate when suction is on side wall of thank?

    In such case is anti vortex plate required?

    When suction is on side wall, does vortex get created?

    ReplyDelete
    Replies
    1. Could you please clarify more your question, actually anti-vortex plate is always required on discharge outlets of suction tanks.

      Delete
  12. Thank you for your effort, more power to you

    ReplyDelete
  13. what is the appropriate thicknessfor MS plat, which is use as Anti-Vortex Plate?

    ReplyDelete
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  15. Overall vibration levels are sometimes insensitive to the small changes in vibration levels caused by bearing deterioration. pump repair

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  16. I am from India. Looking out to purchase/import Anti Vortex Plate 200mm dia pipe (for pump suction) - 1 no. Pls respond to awashglobal@gmail.com or WA to +919867871107. Thanks in advance... Milind Sawant, India.

    ReplyDelete
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