GG20 vs GG20H vs GG20DN: Which GasGuard Nozzle to Buy

Updated 2026-10-07 · Sourced from ELAFLEX documentation

Short answer: All three GG20 nozzles share the same body, 160 mm reach and 1¾" ACME coupling. The nose piece is the only difference. GG20 (single nose) flows the most, 63 L/min, and costs least; it suits trained operators. GG20H (hybrid nose) cuts lever force at 60 L/min for operators who fill all day. GG20DN (patented dual nose) seals even when the nozzle isn't fully tightened, so it is the one to use where the public or untrained staff fill.

The short version

	GG20	GG20H	GG20DN
Nose piece	Single ('E')	Hybrid ('H')	Dual ('DN'), patented
Flow at 12 bar	63 L/min (≈16.6 gpm)	60 L/min (≈15.9 gpm)	60 L/min (≈15.9 gpm)
Gas released on valve closure	1.9 cm³	1.7 cm³	1.7 cm³
Lever hold-open force	Standard	Lower than GG20	Same low force as GG20H
Seals if not screwed fully tight	No	No	Yes
ELAFLEX intended use	Industrial, attended refueling	Industrial, attended refueling	Public, self-service, untrained users
UL 125 listed	Yes	Yes	Yes

GG20: the economy choice for trained operators

ELAFLEX calls the GG20 the most economic type in the range. It uses the single 'E' nose piece and has the highest flow of the three. Pick it when the person filling is trained, the site is attended, and cost per nozzle matters more than operator comfort.

GG20H: less hand fatigue

The hybrid nose piece lowers the force needed to hold the lever open. On a cylinder-exchange dock where one operator fills dozens of forklift cylinders a shift, that adds up. You give up 3 L/min of rated flow and get a slightly smaller release on disconnect (1.7 cm³ instead of 1.9 cm³).

GG20DN: when you can't control who fills

The dual nose piece is the safety upgrade. ELAFLEX states it creates a positive seal to the vehicle even if the user hasn't tightly screwed the nozzle onto the fill point, and that it significantly reduces user error. It has the same low lever force as the GG20H. If members of the public, rental customers or rotating staff will use the nozzle, this is the one to buy.

What doesn't change between them

Reach (160 mm connector nut), the 1¾" ACME coupling, the 25 bar (362 psi) pressure rating, the −40 °C to +110 °C range, the inlet swivel choice (½" or ¾" NPT female), the standard 300 µm strainer, and the options (magnet, latch, splashguard, brass ACME insert). See full specifications and part numbers.

Need standard reach instead?

The same three nose pieces exist on the shorter GG1 series as GG1E, GG1EH and GG1DN, with a 125 mm connector. Choose GG20 only when the fill valve is recessed. See the GasGuard family compared.

Quick answers

Which GG20 version has the highest flow?

The GG20 with the single nose piece, rated 63 L/min at 12 bar. The GG20H and GG20DN are rated 60 L/min.

Which GG20 is safest for self-service?

The GG20DN. Its patented dual nose piece seals even if the nozzle isn't fully tightened, and ELAFLEX designates it for public and untrained users.