CGA677H Gas Cylinder Valve

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The CGA677H is a cylinder valve for argon and nitrogen service. It combines a pressure-sealed construction with a 70° cone seat.

This version has a left-hand outlet connection. Check its thread designation and sealing interface against the mating equipment; models in the same family are not automatically interchangeable.

Key advantages

Specified gas service — A cylinder-valve configuration for argon and nitrogen service.
Cone-seat connection — The defined cone seat helps identify the required mating sealing geometry.
Connection matching — Check the cylinder-side and equipment-side connections independently for this model.

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Specifications

Parameter	Value
Applicable medium	Argon, nitrogen
Working pressure	4350 psi (≈30 MPa)
Gas-tightness test pressure	5220 psi (≈36 MPa)
Safety device	6525 psi (≈45 MPa)
Cylinder / inlet connection	PZ27.8(25E)
Outlet connection	1.030-14NGO-LH-EXT
Connection sealing form	70° cone seat
Valve structure	Pressure-sealed design
Body material	HPb59-1
Stem material	HPb59-1
Handwheel material	ZL102
Temperature range	-40 °C to 60 °C
Manufacturing standard / reference	GB/T 15382

Technical Illustration

For reference. Not to scale.

Product Configurator

Model	Gas	Working pressure	Operation / structure	Inlet	Outlet	Sealing
CGA677H	Argon, nitrogen	4350 psi (≈30 MPa)	Pressure-sealed design	PZ27.8(25E)	1.030-14NGO-LH-EXT	70° cone seat
Your request	Gas request	Working pressure request	Operation / structure request	Inlet request	Outlet request	Sealing request

Special requirements are subject to technical confirmation. Your requests do not change the standard product specifications.

Company catalogue

No approved company catalogue is currently available. You can request specific product documents through Technical Matching.

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Regarding: CGA677H · Argon, nitrogen · 4350 psi (≈30 MPa)

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