Tuning Regulator Question

JackHughs · May 27, 2025

I have a HUMA regulator set to 140 BAR in my .22 700 Panthera. I shoot this rifle tethered to a Nuvair external regulator. Up to now, I've set the external reg to 250 BAR because the HUMA internal reg seems to recover faster with high bottle pressure. The question is: Does the internal HUMA reg respond better, considering both performance and wear, to a large pressure differential (250 BAR/140 BAR) or would it be better to turn the external reg down to say, 200 BAR.

JackHughs

MushroomPsyche · May 27, 2025

If it was my, I will definitely turn down the external regulator closer to the Huma Air. Probably around 50 bars higher, so 200 sounds good.

Motorhead · May 27, 2025

Internal reg likely has the flow restriction screw within the adjuster bonnet, reason a higher upstream pressure seems to recover faster ( Harder push getting air past restriction screw )

Just a guess tho ????

Mrshosted · May 27, 2025

All things considered, if the huma regular is working properly. I don’t see any reason why the bottle regulator pressure matters.
If it a case, it’s want you have to go use. I get it, I’d set the bottle regular somewhere around 225-250 bar. My thought is, it will similar to a normal fill operation range middle point.

1handwill.gc · May 27, 2025

If I was you, I would remove the internal regulator and then use the bottle at 200 or 225 bar and you’ll see how fast your new regulator works but that’s me that’s your equipment

Trucker3573 · May 28, 2025

Just a personal use preference. I personally don’t believe 250 bar is going to over stress or hurt the huma one bit. If the faster refresh rate is a nice bonus I’d just leave it.

Sergey1972 · May 28, 2025

If incomming pressure is too close to 140 bar then on gun reg doesn't open very wide creating the flow restriction. In addition to potential intentional flow restriction on "filling tank" setup.

Tricky-Dicky · May 28, 2025

Swings and roundabouts, regs recover quicker with bigger pressure differential but also suffer more wear to the sealing surfaces and more creep as a result.

JackHughs · May 28, 2025

Thank you all for your considered replies. In an abundance of caution, I will incrementally back-off the external reg to perhaps relieve stress on the HUMA reg and see if (or when) HUMA reg performance suffers. If I discover anything noteworthy, I'll report back.

JackHughs

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Tuning Regulator Question

JackHughs

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MushroomPsyche

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Motorhead

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Mrshosted

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1handwill.gc

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Trucker3573

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Sergey1972

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Tricky-Dicky

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JackHughs

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