How to Save Money When Buying gas booster pumps

I'm getting a little tired of the long drives that I've got to make in order to get fills for the 2 liter HP steel cylinders that I use with my CCR. The only local shop that can reliably supply O2 at sufficient pressure now charges much too much for a fill, ($20.00, as opposed to the $7.00 or so that I pay at more distant shops), and they cannot provide trimix fills.


I've done a bit of research and am seriously considering purchasing a small booster, either a Hydraulics International Compact Booster, or, more likely, a Haskel Mini Sport MSB- Booster.


For a variety of reasons, I do not wish to purchase a compressor, so must rely on OC cylinders and a regulator to supply drive gas.


I have been unable to find any hard data regarding the volume of drive gas that the Haskel booster requires. I'll start with supply gas in steel 100's at 3,500 PSI, and can probably get a couple of transfer fills without having to boost at all, then boost the gas as the supply cylinder pressure decreases.


Can any of you more experienced souls please provide me with an approximation of the volume of drive gas that I can expect to require to run the booster to fill the 2 liter cylinders?

Thank you TrimixToo. You posted a link to that very source recently in a thread started by boulderjohn. I downloaded the file, and opened the Zip and found that the software is only formatted for PCs. I use a Mac and was unable to access the information.

Regarding using a small shop compressor, (which I'd prefer to avoid,) doesn't the Haskel require drive gas to be delivered at a continuous 150 psi and at a reasonable fpm rate? That seems to demand a rather hefty compressor.

A Haskel does not need to be operated at a constant drive gas pressure. Varying the pressure at the pump (via adjustable regulator or valve or both) is how you control cyclic rate and maximum output pressure. For a mini-booster you should not need anything close to the 5HP shop compressor I use for my AG-30. For pumping 02, you will want the cycle rate to be 50/minute *or less* for my booster, and if the drive gas pressure is set to 100 PSI, for example, the maximum O2 pressure would be PSI. The MB probably has different numbers.

I fired up the software, though, and I don't see the mini-booster in it. You could call Haskel or Nuvair to ask about drive gas requirements, or find a PC (yeah, I know) and calculate what you need from a similar but larger booster's numbers.

For my AG-30, it's impractical to use stored drive air to do anything much. The drive gas requirements are just too high for blending into large doubles and LP72 deco tanks. For a RB, it might be reasonable, but you will need a fairly expensive adjustable HP regulator that might well cost more than a small shop compressor, and you will need air fills to do anything at all. You might look into using T bottles of N2 as drive gas instead, which might cost less, if you are really opposed to a shop compressor. Thank you RayfromTX, and thank you once again TrimixToo for your courteous, insightful and informative response. Thank you as well for opening the files that I could not access on my Mac. I am truly appreciative of your going the extra mile to assist a compatriot who also happens to be a total stranger.

My next step may well be to contact the folks at Haskel or Nuvair. (I have a friend who used to work for Nuvair, but he left that position several years ago.)

There are several reasons why I'd prefer not to have a compressor. The only place where I could put and use it would be in our garage, and my wife has this inexplicable desire to occasionally put her car inside, especially when she returns home during one of our frequent torrential rain storms. Who could have imagined that?

Most of the units that have the capacity to run the Haskel are very loud. I'll be doing fills well into the night and have no desire to disrupt the neighborhood with noise pollution. Things are bad enough around here with the infernal whine and bellowing of the local leaf blowers, barking dogs, ambulance sirens, and heliport.

Our garage's wiring may not be able to support the amperage that a suitable compressor requires. Putting a 15 amp load on an already busy 120 circuit may not be tenable. We've got a 220 line which we use for our clothes dryer, but any compressor that runs off of 220 will most likely be very loud and probably be overkill for its' intended purpose.

A compressor is yet another bit of equipment that will require my attention and maintenance. I've owned one in the past, and this is not a major obstacle, but one that I'd prefer to avoid. A preliminary search yielded a pair of compressors that may suit my needs, but I've never actually seen either of them, an Eagle EA-, and Campbell Hausfeld DC both seem to be quiet enough for my domestic situation, and pull low enough amperage to suit the available circuit. I do not know however if they have the capacity to efficiently run the booster.

I've got well over a dozen SCUBA cylinders, a pair of which I'd use for supply O2, and another pair for trimix dil; leaving me with plenty to use for my OC dives, air dil, and drive gas. Getting good, affordable, fast EANx and air fills locally is not an issue, just O2 and mix, for which I'll have to drive and wait a few hours when necessary. I can deal with that a couple of times a month. I've also got several reliable regulators, one of which I can designate for use of the drive gas supply. I can't give you hard data, only anecdotes. I have a mini HI booster, I can dig up the exact reference, but it's the one sold by Add Helium (I'm a dealer too). When filling 2 or 3 liter steels from a full O2 cylinder, it takes a couple of hundred PSI out of your steel hundred. When filling your 3 liter from a nearly empty O2 bottle (getting the last 100 PSI from 400 to 300), it takes nearly the whole steel 100.

My friends in Hawaii have the Haskel version of that booster. They drive it with a home depot 2 HP shop air compressor (the rigid with the 40 gallon tank) at 240 volts (they unplug the dryer and plug in the air compressor) with no issues at all.

Your question is how much air does it take. The answer is "it depends on how much pressure you start with". That's the best I can do for you. If you dive semi-regularly, you will save money buying a shop compressor over getting your hundreds filled. It's going to be interesting to see just how many posts folk can do before someone answers the OP question properly.
Either that or this has to be the hardest question in the world of diving to ask.

'How much drive air does it take to run a Haskel Mini Sport' over the full range of supply oxygen pressures.

Would have thought we would have the answer by now, after all the companies selling them have been doing it for years.
That, or its so darn much no one dare give you a straight answer for fear knowing at $2 a tank for drive air it costs more than the $7.00 oxygen fill.

Who would have thought a drive air chart would be such hard work to get hold of.
Hope we get there by around post 30 which is just about the same CFM rate you need to drive the thing full range in the first place.

Gas is expensive these days, and it doesn't feel like it's getting any cheaper.

With competitive price and timely delivery, SUNCENTER sincerely hope to be your supplier and partner.

The problem, of course, is that gas is a necessity when you drive a car. You have to fill up, no matter the cost.

But that doesn't mean you should settle for high prices and hefty bills'we're here to help. Here are our top five tips for how to save money on gas.

1. Fill up when gas is cheapest

You may think there isn't any difference between starting your week with a trip to the gas station or ending your week with one. But in truth, there is. 

According to Nasdaq, Mondays and Tuesdays are the best days to fill up your tank as there's less demand early in the week.

For the same reasons, gas is often cheaper late at night or early in the morning. So, if your schedule allows it, fill up outside of peak times.

As a bonus, you may be able to squeeze out some extra gas in the morning or night'because gasoline expands when it's warm, colder temperatures make a difference!

2. Change your payment method

If you're part of an organization that partners with RaiseRight, you can save money with every trip to the gas station. Skip the cash or credit card; instead, pay at the pump with a gas gift card from RaiseRight. 

RaiseRight carries gift cards for several major gas stations, including:

• Shell
• ARCO
• Chevron
• BP
• Exxon

You can earn up to 5% back every time you fuel!

Not yet earning with RaiseRight? Here's a quick rundown of how it works:

• Enroll your nonprofit or community organization in a RaiseRight fundraising program. Or, join an existing one with an enrollment code.
  
  
• Shop online or buy gift cards from hundreds of brands you know and love'from gas to groceries, clothing, fast food, travel, entertainment, and more, there's something for everyone on the RaiseRight platform. 
  
  
• A percentage of every purchase goes directly back to you or your organization. Even better? The earnings come directly from the brands you buy from, so you're fundraising and earning effortlessly'without spending an extra dime.

Best of all, most gas gift cards are reloadable. If your gift card funds deplete while you're on the road, you can instantly add money with just a few taps on the RaiseRight mobile app.

Want more information on gas booster pumps? Feel free to contact us.

3. Use apps to find the best deal

You might be surprised to learn about these easy tools that can help you save on gas. Instead of driving from station to station on the hunt for cheaper fuel (oh, the irony!), you can use an app to find the lowest prices.

Some of the best money-saving apps for gas include:

• GasBuddy ' This free app shows you nearby gas stations and their prices so you can decide where to go. You can also enter contests and earn points to win gas gift cards.
  
  
• Fuelzee ' Like GasBuddy, Fuelzee helps you find the cheapest gas near you. There are also reward points that go toward non-gas station retailers.
  
  
• Waze ' Waze is a community-based navigation app, but it's more than just a map'it'll let you know how to get gas cheaper, too. Drivers can input local gas prices so you can sort by price when you put in directions for a nearby gas station. Plus, Waze provides up-to-date information on traffic jams and optimal routes, so you can save even more time and gas.

4. Take advantage of grocery store discounts and rewards

Hot tip: one of the best ways to save on gas is to simply buy food and groceries for the week!

Some grocery stores include a gas coupon on your receipt, so you can save money by filling up at the store's gas station on your way out.

Other grocery stores have reward systems. For example, when you shop at Albertsons, Safeway, or ACME, you can earn Gas Reward points that save you up to $1 per gallon at participating stations. Other stores have similar programs, so check in with your local grocery chain to learn more about what's available in your area.

Additionally, these programs enable you to double down on savings since you can use RaiseRight gift cards to shop at most major grocery stores. Here's how RaiseRight user Ann H. stacks grocery promotions with gift cards to save money on gas:

'I figured out ways to capitalize on the savings and put more money in my pocket'For example, I save 6 to 8% on groceries while collecting points through the store's promotion to save $1 per gallon of gas. Then, I use another RaiseRight gift card to buy that gas, which stacks on another 8% in earnings.'

Win-win!

5. Figure out ways to drive less

The best way to save gas involves driving your car less often. It may not always be possible, but even the smallest tweaks can make a difference.

For example, whenever you head out, plan your errands and stops, and know your route. The more you combine trips, the less gas you'll spend driving across town (and the more efficient your errand-running will become!).

Or, create a carpool system with families in your neighborhood. For instance, if your kids participate in the same activities as other neighborhood kids, consider riding together so you can reduce everyone's driving.

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