High-Pressure Composite Pressure Vessels (COPVs)

Part No.	Volume	Pressure	Ø Dia	Length	Weight	H₂ / Grav.	Approvals	Lifespan
HDRX-068-H2 ↗	6.8 L	350 bar	158 mm	526 mm	2.8 kg	161 g · 5.4%	CEH2DEVPRE-ORDER	20 yr	Pre-Order
HDRX-068-H2-UL ↗	6.8 L	350 bar	158 mm	526 mm	2.3 kg	161 g · 6.5%	H2DEV	20 yr	Order
HDRX-068-HE ↗	6.8 L	350 bar	158 mm	526 mm	2.8 kg	—	πCEISOHEDEVPRE-ORDER	20 yr	Pre-Order
HDRX-068-HE-UL ↗	6.8 L	350 bar	158 mm	526 mm	2.30 kg	—	HEDEV	20 yr	Order
HDRX-400-H2 ↗	40.0 L	350 bar	229 mm	1406 mm	18.00 kg	948 g · 5.0%	CEH2DEVPRE-ORDER	20 yr	Pre-Order
HDRX-400-HE ↗	40.0 L	350 bar	229 mm	1406 mm	18.00 kg	—	πCEISOHEDEVPRE-ORDER	20 yr	Pre-Order
HDRX-005 ↗	0.5 L	300 bar	80 mm	190 mm	0.42 kg	—	πCEISOUW	NLL	Order
HDRX-005-MIL ↗	0.5 L	300 bar	80 mm	190 mm	0.42 kg	—	πCEISOUWMIL	NLL	Order
HDRX-008-MIL ↗	0.8 L	300 bar	80 mm	270 mm	0.55 kg	—	πCEISOUWMIL	NLL	Order
HDRX-005-HE ↗	0.5 L	350 bar	80 mm	190 mm	0.42 kg	—	πCEISOHEDEV	20 yr	Order
HDRX-005-H2 ↗	0.5 L	350 bar	80 mm	190 mm	0.42 kg	12 g · 2.7%	CEH2DEV	20 yr	Order
HDRX-015 ↗	1.5 L	300 bar	114 mm	238 mm	0.79 kg	—	πCEISOUW	NLL	Order
HDRX-015-MIL ↗	1.5 L	300 bar	114 mm	238 mm	0.79 kg	—	πCEISOUWMIL	NLL	Order
HDRX-015-HE ↗	1.5 L	350 bar	114 mm	238 mm	0.79 kg	—	πCEISOHEDEV	20 yr	Order
HDRX-015-H2 ↗	1.5 L	350 bar	114 mm	238 mm	0.79 kg	36 g · 4.3%	CEH2DEV	20 yr	Order
HDRX-020 ↗	2.0 L	300 bar	118 mm	321 mm	1.10 kg	—	πCEISOUW	NLL	Order
HDRX-020-MIL ↗	2.0 L	300 bar	118 mm	321 mm	1.10 kg	—	πCEISOUWMIL	NLL	Order
HDRX-020-HE ↗	2.0 L	350 bar	118 mm	321 mm	1.10 kg	—	πCEISOHEDEV	20 yr	Order
HDRX-020-H2 ↗	2.0 L	350 bar	118 mm	321 mm	1.10 kg	47 g · 4.1%	CEH2DEV	20 yr	Order
HDRX-030 ↗	3.0 L	300 bar	116 mm	444 mm	1.60 kg	—	πCEISOUW	NLL	Order
HDRX-030-MIL ↗	3.0 L	300 bar	116 mm	444 mm	1.60 kg	—	πCEISOUWMIL	NLL	Order
HDRX-030-HE ↗	3.0 L	350 bar	116 mm	444 mm	1.60 kg	—	πCEISOHEDEV	20 yr	Order
HDRX-030-H2 ↗	3.0 L	350 bar	116 mm	444 mm	1.60 kg	71 g · 4.3%	CEH2DEV	20 yr	Order
HDRX-043 ↗	4.3 L	300 bar	118 mm	597 mm	2.20 kg	—	πCEISOUW	NLL	Order
HDRX-043-MIL ↗	4.3 L	300 bar	118 mm	597 mm	2.20 kg	—	πCEISOUWMIL	NLL	Order
HDRX-043-HE ↗	4.3 L	350 bar	118 mm	597 mm	2.20 kg	—	πCEISOHEDEV	20 yr	Order
HDRX-043-H2 ↗	4.3 L	350 bar	118 mm	597 mm	2.20 kg	102 g · 4.4%	CEH2DEV	20 yr	Order
HDRX-068 ↗	6.8 L	300 bar	158 mm	526 mm	2.80 kg	—	πCEISOUW	NLL	Order
HDRX-068-MIL ↗	6.8 L	300 bar	158 mm	526 mm	2.80 kg	—	πCEISOUWMIL	NLL	Order
HDRX-090 ↗	9.0 L	300 bar	177 mm	577 mm	3.80 kg	—	πCEISOUW	NLL	Order
HDRX-090-MIL ↗	9.0 L	300 bar	177 mm	577 mm	3.80 kg	—	πCEISOUWMIL	NLL	Order
HDRX-090-HE ↗	9.0 L	350 bar	177 mm	577 mm	3.80 kg	—	πCEISOHEDEV	20 yr	Order
HDRX-090-H2 ↗	9.0 L	350 bar	177 mm	577 mm	3.80 kg	213 g · 5.3%	CEH2DEV	20 yr	Order
HDRX-400 ↗	40.0 L	300 bar	229 mm	1406 mm	18.00 kg	—	πCEISOUW	NLL	Order
HDRX-400-MIL ↗	40.0 L	300 bar	229 mm	1406 mm	18.00 kg	—	πCEISOUWMIL	NLL	Order
DRX-010-88 ↗	1.0 L	200 bar	88 mm	259 mm	0.75 kg	—	—	15 yr	Order
DRX-020-108 ↗	2.0 L	200 bar	108 mm	305 mm	1.15 kg	—	πCE	15 yr	Order
DRX-020-110-200 ↗	2.0 L	200 bar	110 mm	305 mm	1.15 kg	—	πCE	15 yr	Order
DRX-020-122 ↗	2.0 L	200 bar	122 mm	274 mm	1.20 kg	—	πCE	NLL	Order
DRX-050-136 ↗	5.0 L	200 bar	136 mm	510 mm	2.85 kg	—	π	NLL	Order
DRX-0025-50 ↗	0.25 L	300 bar	50 mm	210 mm	0.24 kg	—	πISO	15 yr	Order
DRX-0025-51 ↗	0.25 L	300 bar	51 mm	200 mm	0.28 kg	—	πISO	15 yr	Order
DRX-008-100 ↗	0.8 L	300 bar	100 mm	177 mm	0.50 kg	—	πISO	10 yr	Order
DRX-008-111 ↗	0.8 L	300 bar	111 mm	155 mm	0.70 kg	—	πCE	15 yr	Order
DRX-010-87 ↗	1.0 L	300 bar	87 mm	247 mm	0.75 kg	—	π	20 yr	Order
DRX-010-90 ↗	1.0 L	300 bar	90 mm	256 mm	0.75 kg	—	π	15 yr	Order
DRX-010-97 ↗	1.0 L	300 bar	97 mm	222 mm	1.12 kg	—	π	15 yr	Order
DRX-011-100 ↗	1.1 L	300 bar	100 mm	225 mm	0.65 kg	—	πISO	10 yr	Order
DRX-015-100 ↗	1.5 L	300 bar	100 mm	288 mm	0.90 kg	—	πISO	10 yr	Order
DRX-015-111 ↗	1.5 L	300 bar	111 mm	248 mm	1.01 kg	—	πCE	15 yr	Order
DRX-020-100 ↗	2.0 L	300 bar	100 mm	389 mm	1.35 kg	—	π	15 yr	Order
DRX-020-111 ↗	2.0 L	300 bar	111 mm	317 mm	1.15 kg	—	πCE	15 yr	Order
DRX-020-114 ↗	2.0 L	300 bar	114 mm	308 mm	1.45 kg	—	πCE	20 yr	Order
DRX-023-97 ↗	2.3 L	300 bar	97 mm	440 mm	1.30 kg	—	—	15 yr	Order
DRX-030-114 ↗	3.0 L	300 bar	114 mm	438 mm	1.90 kg	—	πCE	20 yr	Order
DRX-040-114 ↗	4.0 L	300 bar	114 mm	657 mm	2.20 kg	—	πCE	20 yr	Order
DRX-040-122 ↗	4.0 L	300 bar	122 mm	475 mm	2.20 kg	—	πCE	15 yr	Order
DRX-068-154 ↗	6.8 L	300 bar	154 mm	520 mm	3.55 kg	—	π	15 yr	Order
DRX-090-187 ↗	9.0 L	300 bar	187 mm	497 mm	5.00 kg	—	πCE	15 yr	Order
DRX-100-187 ↗	10.0 L	300 bar	187 mm	544 mm	5.50 kg	—	πCE	15 yr	Order
DRX-0075-122 ↗	0.75 L	440 bar	122 mm	140 mm	0.54 kg	—	—	—	Order
DRX-050-182 ↗	5.0 L	210 bar	182 mm	348 mm	2.50 kg	—	—	10 yr	Order
DRX-100-182-210 ↗	10.0 L	210 bar	182 mm	510 mm	5.00 kg	—	—	10 yr	Order
DRX-500-318 ↗	50.0 L	150 bar	318 mm	875 mm	20.50 kg	—	π	15 yr	Order
CNG-050 ↗	50 L	250 bar	388 mm	625 mm	13.8 kg	—	CNGDEV	20 yr	Order
CNG-080 ↗	80 L	250 bar	388 mm	870 mm	20.4 kg	—	CNGDEV	20 yr	Order
CNG-100 ↗	100 L	250 bar	388 mm	1105 mm	26.3 kg	—	CNGDEV	20 yr	Order
CNG-120 ↗	120 L	250 bar	388 mm	1340 mm	32.7 kg	—	CNGDEV	20 yr	Order
CNG-195 ↗	195 L	250 bar	439 mm	1670 mm	46.5 kg	—	CNGDEV	20–30 yr	Order
CNG-350 ↗	350 L	250 bar	536 mm	2045 mm	94.0 kg	—	CNGDEV	20–30 yr	Order
HDRX-1200-H2 ↗	120 L	350 bar	496 mm	1345 mm	38 kg	2.84 kg · 7.0%	H2DEV	20 yr	Order
HDRX-1200-HE ↗	120 L	350 bar	496 mm	1345 mm	38 kg	—	πCEISOHEDEV	20 yr	Order
HDRX-3500-H2 ↗	350 L	350 bar	452 mm	1676 mm	57 kg	8.29 kg · 12.7%	H2DEV	20 yr	Order
HDRX-3500-HE ↗	350 L	350 bar	452 mm	1676 mm	57 kg	—	πCEISOHEDEV	20 yr	Order

π TPED 2010/35/EU

CE PED 2014/68/EU

ISO ISO 11119-3

UW Under Water rated

H2 EN ISO 12245:2022 (hydrogen)

CNG EN ISO 11439 / ECE R110

PRE-ORDER Development nearly complete — pre-orders open

DEV Under development — technical inquiry welcome

HE Helium service — sealed liner, no measurable permeation

MIL Military / UW — STANAG 2897 (AEODP-7) Class A non-magnetic, breathing air for EOD/MCM diving

Hydrogen — fuel-cell UAS & weight-critical systems

A MEYER cylinder for hydrogen stores up to 161 g of H₂ at 350 bar in the 2.8 kg HDRX-068-H2, and up to 948 g in the 40 L HDRX-400-H2 — CE marked to EN ISO 12245:2022. Every -H2 part number is built on the MEYER sealed liner: no measurable hydrogen permeation, verified by helium leak detection, with no metal-fatigue cap on cycle life. Pre-orders are open on the 6.8 L and 40 L models.

Helium — the gas that normally escapes

Helium permeates standard polymer liners faster than any other industrial gas — which is why helium systems have long defaulted to heavy metal cylinders. The dedicated -HE range keeps helium stored in full-composite cylinders from 0.5 to 40 L (120 L and 350 L in development) with π, CE and ISO 11119-3 approvals — for satellite pressurant, tracer-gas rigs, lighter-than-air platforms and research. See the sealed-liner background or run the numbers in the gas-loss cost calculator.

STANAG / MIL — non-magnetic for EOD & MCM

The -MIL configurations are non-magnetic builds aligned with STANAG 2897 (AEODP-7) Class A procurement for EOD/MCM diving — from the 0.55 kg HDRX-008-MIL upward. EU origin, ITAR-free.

Frequently asked questions

What is a Type IV composite cylinder (COPV)?: A composite overwrapped pressure vessel with a polymer liner and full carbon-fibre structural overwrap — the lightest cylinder construction available, typically a third of the weight of steel, with no metal liner to fatigue.
How much hydrogen can a composite cylinder store?: At 350 bar and 15 °C: about 161 g in the 6.8 L HDRX-068-H2 (2.8 kg cylinder, 5.4% gravimetric) and about 948 g in the 40 L HDRX-400-H2 (18 kg). Use the H₂ / Grav. column above for every model.
Do composite cylinders leak helium?: Standard polymer-lined cylinders do — helium permeates polymers faster than hydrogen. MEYER -HE and -H2 models use the sealed liner, showing no measurable permeation in qualification, verified by helium leak detection.
What approvals do the cylinders carry?: Depending on family: π (TPED 2010/35/EU), CE, ISO 11119-3 and UW ratings; hydrogen models carry CE to EN ISO 12245:2022; -MIL models are non-magnetic STANAG 2897 Class A configurations. Each row above shows its badges — hover them for the exact standard.
Can I order a cylinder with a custom safety factor?: Yes — for R&D and qualification-by-project programs, use the Safety Factor control above: working pressure is derived as burst ÷ SF (burst = 3 × catalog WP, fixed), and quotes carry a -SF part-number suffix, e.g. HDRX-400-HE-SF2.5. Derived ratings are engineering configurations, not certified ratings.
How do I get pricing?: Select cylinders with the checkboxes and use “Request quote” — one request covers multiple part numbers and quantities. Meyer sales replies with pricing and lead times within 3 working days.

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Only cylinders marked NLL (No Limited Lifespan) remain in service indefinitely, subject to periodic testing — all others have a defined service life as listed. Tested per the standard listed. Specify gas medium when ordering. H₂ capacity at working pressure / 15 °C; gravimetric % = H₂ mass ÷ (H₂ + cylinder mass). Thread sizes available: M18×1.5, 17E, 25E, 3/4″-16 UNF, 5/8″-18 UNF, M12×1, and others on request. Need a size, pressure, or geometry not listed? Open a custom RFQ.

High Pressure COPV by MEYER

Hydrogen — fuel-cell UAS & weight-critical systems

Helium — the gas that normally escapes

STANAG / MIL — non-magnetic for EOD & MCM

Frequently asked questions

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