DGX Deluxe Gas Blending and Transfill Kit with Digital Gauge

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The accuracy and precision of the digital gauge included with our premium quality transfill hose makes this system suitable for gas blending of Nitrox, Heliox and Trimix diving gases as well as transfilling.

DGX Deluxe Gas Blending and Transfill Kit with Digital Gauge

Deluxe Gas Blending and Transfill Kit
Deluxe Gas Blending and Transfill Kit Digital Gauge and fittings Quick Release Attachments

The accuracy and precision of the digital gauge included with our premium quality transfill hose makes this system suitable for gas blending of Nitrox, Heliox and Trimix diving gases as well as transfilling. It includes a quick connect system that makes it easy to reconfigure, providing the ability to blend or transfill from a variety of sources. The high pressure { 96 in | 2.4 m } Swagelok® breathing gas hose is long enough to reach even the tallest supply cylinders and has a check valve to prevent back flow.

The inlet end of the hose quick connects to any of the three common US adapters included in the package: a CGA-580 helium/argon, a CGA-540 oxygen, and a DIN scuba fitting with bleed valve. The outlet end of the hose includes a line valve, a digital electronic pressure gauge that is user configurable for psi or bar display, and a DIN scuba fitting with bleed valve. Add one or two optional DIN-to-Yoke adapters to transfill recreational sport scuba cylinders with yoke A-clamp valves (aka 'K-valves', formally described by the GGA-850 standard).

Some customer reviews confuse the issue of a needle valve vs the line valve actually included in the product. The DGX Deluxe Gas Blending and Transfill Kit with Digital Gauge was designed by Mark at Dive Gear Express and all the components were carefully selected by him; Mark is IANTD certified Gas Blending Instructor Trainer. He says that the valve included is a high quality line valve perfectly matched to this application for accurate blending.

More Information
Brand DGX
Weight (lbs) 8.0000
Customer Reviews
Most Helpful Customer Reviews
  1. 1 person found the following review helpful
    Excellent whip. Costly but really great for blending.



    This is your ready to use whip. Look no further. It's great build and the digital gauge is very precise. The needle valve is smooth and control is easy.

    Sure you can build it cheaper yourself but with this set you will be blending right out of the box.

    The quick connect set is simply awesome.

    Please be aware: For European / Non-US users (Helium with BS-3 connector) you need to replace the CGA-580 connector with a BS-3 thread. It's easy to unscrew the nipple / Bull-nose from the connector and change it.
    Comment Was this review helpful to you? Thank you for your feedback! You already voted Sorry, we failed to record your vote. Please try again
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Uncoupling DIN Fittings From SCUBA Valves

There is more to disconnecting a DIN fitting from a valve than you might imagine. Do it incorrectly and you will probably lose an o-ring and perhaps even need to have your regulator serviced. The problem is most pronounced in using DIN fittings on fill whips, and more rarely on first stage regulators. The o-ring popping out of the nose of the DIN fitting is an issue on scuba regulators and fill whip hoses and it is caused by failing to completely bleed residual pressure before uncoupling the fitting.

On fill whips, you can be certain all the pressure is released by opening the bleed and waiting a few extra seconds before starting to unscrew the fitting. You need to wait a moment after the hiss stops, because the bleed hole is tiny and gas will continue to escape even after the hissing stops. Compact ring-style bleeds found on fill whips that twist either direction to bleed are popular because you can't lose the bleed screw, but with this design you must make sure the ring is centered on the bleed opening because if you keep twisting you will close it again with out fully bleeding the hose.

Even when divers are using improper technique to unscrew DIN fittings on first stages, they rarely see the problem because usually they are unscrewing the fitting from a nearly empty cylinder with relatively little pressure remaining. But if the cylinder is nearly full and the diver encounters a circumstance where the first stage DIN fitting must be unscrewed then proper technique can very important. Briefly purging the second stage just once is not enough, residual pressure trapped in the high-pressure hose of the SPG will take several seconds to move all the way back through the regulator first stage to the second stage. You must wait a moment between each time you push the purge and you must do it three times in a row to fully release all the pressure from the hoses. Another equally effective two-handed technique is to continue to hold the second stage purge down in one hand while you begin to unscrew the DIN fitting using the other hand.

DIN fitting designs on regulators use a two or three part assembly in which the threaded component with a handwheel collar slides onto a hollow center post and is retained by a 'nose cap' that contains the sealing DIN o-ring on the front and a smaller o-ring on the back. Improperly unscrewing the collared threads by rocking the entire assembly back and forth, or just using brute force to 'break' the seal can eventually can loosen the center post and/or nose cap causing a leak or seal failure the next time you try to use the fitting. We've seen the loosened nose cap act as a 'locking' mechanism, resulting in the regulator becoming frozen in to the DIN outlet and impossible to remove. Sometimes you can 'save-a-dive' by using a hex wrench to hand tighten the DIN assembly but a loose assembly is nearly impossible to permanently correct in the field and usually requires bench service to be able to fully tighten and lock the assembly back in place.

Proper technique to uncouple a DIN fitting requires you be careful to only turn the collar in the DIN fitting, don't grab and turn the entire assembly. If you can't easily turn just the collar to unscrew, i.e. you have to use force on the the entire assembly to 'break' the seal, then the line is not fully depressurized and you need to repeat the bleed.

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