Announcement

Collapse

Firehouse.com Forum Rules & Guidelines

Forum Rules & Guidelines

Not Permitted or Tolerated:
• Advertising and/or links of commercial, for-profit websites, products, and/or services is not permitted. If you have a need to advertise on Firehouse.com please contact sales@firehouse.com
• Fighting/arguing
• Cyber-bullying
• Swearing
• Name-calling and/or personal attacks
• Spamming
• Typing in all CAPS
• “l33t speak” - Substituting characters for letters in an effort to represent a word or phrase. (example: M*****ive)
• Distribution of another person’s personal information, regardless of whether or not said information is public knowledge and whether or not an individual has permission to post said personal information
• Piracy advocation of any kind
• Racist, sexual, hate type defamatory, religious, political, or sexual commentary.
• Multiple forum accounts

Forum Posting Guidelines:

Posts must be on-topic, non-disruptive and relevant to the firefighting community. Post only in a mature and responsible way that contributes to the discussion at hand. Posting relevant information, helpful suggestions and/or constructive criticism is a great way to contribute to the community.

Post in the correct forum and have clear titles for your threads.

Please post in English or provide a translation.

There are moderators and admins who handle these forums with care, do not resort to self-help, instead please utilize the reporting option. Be mature and responsible for yourself and your posts. If you are offended by another member utilize the reporting option. All reported posts will be addressed and dealt with as deemed appropriate by Firehouse.com staff.

Firehouse.com Moderation Process:
Effective immediately, the following moderation process will take effect. User(s) whose posts are determined by Firehouse.com staff to be in violation of any of the rules above will EARN the following reprimand(s) in the moderation process:
1. An initial warning will be issued.
2. A Final Warning will be issued if a user is found to be in violation a second time.
3. A 3-day suspension will be issued if the user continues to break the forum rules.
4. A 45-day suspension will be issued if the user is found to be a habitual rule breaker.
5. Habitual rule breakers that have exhausted all of the above will receive a permanent life-time ban that will be strictly enforced. Reinstatement will not be allowed – there is no appeal process.

Subsequent accounts created in an effort to side-step the rules and moderation process are subject to automatic removal without notice. Firehouse.com reserves the right to expedite the reprimand process for any users as it is deemed necessary. Any user in the moderation process may be required to review and agree to by email the terms and conditions listed above before their account is re-instated (except for those that are banned).

Firehouse.com reserves the right to edit and/or remove any post or member, at any time, for any reason without notice. Firehouse.com also reserves the right to warn, suspend, and/or ban, any member, at any time, for any reason.

Firehouse.com values the active participation we have in our forums. Please ensure your posts are tasteful and tactful. Thank you very much for your cooperation.
See more
See less

Problems with Hale mechanical pump seals?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Problems with Hale mechanical pump seals?

    Our 2001 engine has a Hale Q flo 1,250 pump being rebuilt. The mechanical seal gave out. In disassembling the pump they found several tablespoons of sand. The claim is being made that we must be drafting gravel and that why the pump died an early death.

    Our 1990 engine with a similar Hale pump without the mechanical seal has never had a problem. Never had any leaks or other issues. Both engines have relatively low hours and both draft from the same dry hydrants as necessary. Pumps are flushed after use but for some reason the sand in the newer pump did not flush away.

    We suspect a design flaw or failure with the mechanical seal. Has anyone else experienced premature problems with their Hale pumps?
    Remember, it IS as bad as you think and they ARE out to get you!

  • #2
    Originally posted by Jim917
    Our 2001 engine has a Hale Q flo 1,250 pump being rebuilt. The mechanical seal gave out. In disassembling the pump they found several tablespoons of sand. The claim is being made that we must be drafting gravel and that why the pump died an early death.

    Our 1990 engine with a similar Hale pump without the mechanical seal has never had a problem. Never had any leaks or other issues. Both engines have relatively low hours and both draft from the same dry hydrants as necessary. Pumps are flushed after use but for some reason the sand in the newer pump did not flush away.

    We suspect a design flaw or failure with the mechanical seal. Has anyone else experienced premature problems with their Hale pumps?
    It sounds like this 2001 Mechanical Seal vs 1990 adjustable Packing, correct?

    If it is then it is a specification issue. IMO. If it was supplied the way it was specified with the mechanical seal you got what you asked for. Take it for what it is worth. Mechanical seals are a ceramic material making the seal to the shaft and the adjustable packing can be tightened.

    If the sand and grit ate the seal up, you need to replace it. (and whatever else got damaged) We have a Hale AP50 on our tanker and had to rebuild the pump last year due to the mechanical seal going bad.

    If they found sand in the pump what else did they have to replace? The tolerances on impellers are also tight. Sand in the area of the impeller spinning at 1000's of rpms will do bad things. Water and sand abrasive is what they use in metal working. No matter what, sand in the pump is bad. Something had to happen to allow it to get there and that is an operational issue. Flushing will hopefully stop the damage from continueing but damage has already started while it was pumping and sucked up the sand.

    I am not a pump expert, but have some knowledge from our own experiences.

    Comment


    • #3
      seals

      I don't run Hale but have dealt with them in the past and in the military as well. Mechanical seals have the advantage od not requiring constant adjustment and supposedly replacment of packing during the life cycle of run ning the pump. However, I find that mechanical seals are prone to failure from what you describe and from overheating due to cavitation or other abuses. The replacemnt process of a mechanical seal is, in my estimation, more troublesome than replacing or adding packing. Just my two cents.

      Comment


      • #4
        LVWRENCH, We have run Hale pumps for 40+ years. They are very good pumps. When the "mechanical" seal was introduced, we steered clear of them due to the exact concerns that you posted. We often draft from ponds & rivers and it is almost impossible not to get some sort of debris in the pump. The adjustable packings are "much" more forgiving. The Hales will still pull an incredible draft even when the packings are a little out of adjustment. They also will withstand the heat better.
        As far as replacing them goes, they are not that difficult anymore. On older pumps, they were a bear to work on just because of the space that they put them in! Today, at least on our Hales, it may take about an hour for the total job.
        You've got a good pump, just a crappy seal design. Unfortunately you're going to have to monitor it and just replace it. Hopefully, before any other pump damage is done!
        Good Luck

        Comment


        • #5
          Originally posted by MaximI
          You've got a good pump, just a crappy seal design. Unfortunately you're going to have to monitor it and just replace it. Hopefully, before any other pump damage is done! Good Luck
          That's the exact problem we face. Because of the crappy design, it retains more or the typical sediment you find in any drafting situation and unfortunately the damage is done before you even know it. The first symptom is when the seal starts puking out water suddenly.

          Well, the next step is to check with Hale and see if they will cover any of the expense.

          For those of you with mechanical seals, watch out and flush frequently!
          Remember, it IS as bad as you think and they ARE out to get you!

          Comment

          300x600 Ad Unit (In-View)

          Collapse

          300x600 Forums Only

          Collapse

          Taboola

          Collapse

          Upper 300x250

          Collapse

          Lower 970x90

          Collapse

          Lower 728x90

          Collapse

          Lower 300x50

          Collapse
          Working...
          X