Home Podcasts THMG187 – Pumps

THMG187 – Pumps

15751
0
SHARE

In this episode, Bob and Mike explore three popular types of pumps and how they’re used in emergency situations.

Thank to our sponsors, CavCom, Inc., First Line Technology, and All Safe Industries.

Our hazardous materials training manual, National Emergency Response Hazmat Drills: 50 Drills for Use with Hazardous Materials Personnel, is finally available on Amazon!

Complete Show Notes

6:00 Why Do We Use Pumps?

  • Essentially, we use pumps to move product from one area to another
  • On Bob and Mike’s rig, they have pneumatic, manual, rotary, and siphon pumps

7:05 Manual Pumps

  • Essentially, these are just manually-driven double diaphragm pumps
  • Works similarly to how our hearts work – two chambers, valves, septum in the middle, etc.
  • When you move the handle in one direction, you have pressure on one side and a vacuum on the other
  • Liquid comes in, fills the vacuum, and then is forced out through the output hose via pressure when the rubber flap closes
  • Moves a gallon and a half of product per stroke, so it’s a very effective piece of equipment
  • The more rocky/dirty the substance, the less likely the flaps are to engage and hold a good pressure
  • This is one of the stronger pumps available in terms of moving product, as long as you’re not introducing air into the system
  • Liquid stays in place when you’re using manual pumps because of the valves
  • You want your lead hose as close to the pump as possible
  • Trying to suck up a shallow puddle on the road introduces too much air into the drum, leading to inefficiency
  • Keep in mind that the drum can explode if the hose clogs
  • Harder to push thicker liquids through manual pumps – “separates the men from the boys”
  • In general, manual pumps are some of your safest options

20:45 Pneumatic (Air-Actuated) Pumps

  • The pneumatic double diaphragm pump Bob and Mike use moves 180 gallons of fluid per minute
  • Important to monitor the drum – these pumps move very quickly
  • Instead of having a flapper valve, these pumps use a ball that moves up and down via gravity and pressure
  • Pneumatic pumps are better at sucking up dirty product than manual ones – once granules make it past the ball, they can pass through the rest of the pump
  • Using this pump isn’t always the most convenient option since you have to transport air cylinders with you
  • Possible to make “air extension cords” that are miles long using the rig, though
  • Bob and Mike use a stainless steel pump for oxidizers, corrosives, and reactives
  • Drums, diaphragms, and hoses come in a variety of materials – make sure your pump’s components are compatible with the substance you’re pumping

31:30 Venturi Pumps

  • Primarily used in the hazmat industry, although plenty of hazmat techs aren’t big fans
  • This device puts high-pressure air across the top of the drum (rather than in it) – creates negative pressure
  • Commonly used in ponds and fish tanks with garden hoses
  • Creates a huge vacuum that allows you to suck up anything that fits into the tube
  • If the vacuum fails, the liquid falls straight down to the bottom of the tube – this can be catastrophic

35:40 Other Pumps

    • Some pumps allow you to pressurize the drum
    • Drop a stinger into the drum and hook the vacuum up to that stinger – this essentially makes the drum an intermediary

Have a question? Send an email to feedback@thehazmatguys.com or leave a message on our Haz Mat Guys comment hotline: 843-628-1484

Show Sponsors
Related Episodes
The Hazmat Guys

Author: The Hazmat Guys

LEAVE A REPLY

Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.