CGA350 Stainless Steel Cylinder Connector | 316L Gas Regulator Inlet to 1/4

Material: 316L Stainless Steel
Connection Type: CGA350 Left-Hand Thread (.825-14 NGO-LH)
Outlet Thread: 1/4" Male NPT
Stem Length: 100mm (Cylinder Connector), 3.0 inches (Regulator Fitting)
Applicable Gases: Hydrogen, Ethylene, Methane, Ammonia, Arsine, and various other industrial and flammable gases
Maximum Working Pressure: 3000 psig
Seal Type: Metal-to-Metal Seal
Color: Silver Stainless Steel
Weight: Approximately 0.5 kg

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Product Details

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CGA-350 Stainless Steel Cylinder Connector & Gas Regulator Inlet Fitting

Product Overview

We offer high-quality CGA-350 stainless steel fittings designed to provide safe, leak-proof connections between compressed gas cylinders and gas regulators or equipment. Manufactured from durable 316L stainless steel, these fittings meet stringent CGA (Compressed Gas Association) standards, ensuring compatibility with a wide range of industrial, flammable, and specialty gases.

Key Features

Premium Material: Made from corrosion-resistant 316L stainless steel for enhanced durability and longevity.

Standardized CGA-350 Interface: Ensures compatibility with cylinders containing gases such as hydrogen, ethylene, arsine, and many others.

High Pressure Rating: Suitable for use up to 3000 psig, supporting demanding industrial and laboratory environments.

Metal-to-Metal Seal: Provides a secure, leak-tight connection without the need for thread sealants like PTFE tape or pipe dope.

Versatile Applications: Perfect for industrial gas delivery, semiconductor manufacturing, medical gas systems, and research laboratories.

Long Nipple Design (SEQ3504SSL): Facilitates easier regulator attachment and improved handling.

Technical Specifications

Feature	Cylinder Connector	Regulator Inlet Fitting (SEQ3504SSL)
Material	316L Stainless Steel	316L Stainless Steel
Thread Type	0.825" Female Left-Hand Thread (Bull Nose Nut)	Left-Hand Thread (.825-14NGO-LH)
Outlet Thread	1/4" Male NPT	1/4" Male NPT
Stem/Nipple Length	100 mm (approx. 3.94 in)	3.0 inches (76.2 mm)
Maximum Working Pressure	Up to 3000 psig	Up to 3000 psig
Compatible Gases	Hydrogen, Ethylene, Arsine, Deuterium, Methane, Carbon Monoxide, and others	Hydrogen, Methane, Carbon Monoxide, Arsine, Ethylene, and more
Weight	Approx. 0.5 kg	N/A

Compatible Gases

Both fittings are suitable for a broad range of gases including but not limited to:

Hydrogen

Methane

Carbon Monoxide

Arsine

Deuterium

Ethylene

Ethane

Silane

Phosphine

Vinyl Fluoride

And other flammable and specialty gases as defined by CGA-350 standards.

Installation & Safety Instructions

Always ensure the gas cylinder valve is closed before attaching any fitting.

Thread the connector or fitting onto the cylinder valve by hand, ensuring it is snug without cross-threading.

Use a wrench to tighten an additional 1/4 to 1/2 turn-do not over-tighten to avoid damage or leaks.

Do not use pipe dope or PTFE tape on CGA fittings; these rely on metal-to-metal or gasket seals for leak prevention.

Perform a leak test after installation to confirm a secure seal.

Regularly inspect fittings for wear, corrosion, or damage and replace as necessary.

Why Choose Our CGA-350 Stainless Steel Fittings?

Reliable Quality: Manufactured under strict quality controls with pressure testing for safety and performance.

Wide Industry Use: Trusted by industrial, medical, semiconductor, and research sectors worldwide.

Customizable Options: Available in various lengths and configurations to meet specific application needs.

Expert Support: Our team provides technical assistance to help you select and install the correct fittings.

Frequently Asked Questions (FAQ)

Q: How do I select the correct CGA-350 fitting for my gas and equipment?

A: Match the fitting to your gas type and pressure requirements by consulting equipment specs and CGA standards. Contact us or your gas supplier for expert advice.

Q: Can I use thread sealants on CGA fittings?

A: No. CGA fittings are designed for metal-to-metal or gasket seals and should never use pipe dope or PTFE tape.

Q: What gases are compatible with CGA-350 fittings?

A: Compatible with many industrial and flammable gases including hydrogen, methane, arsine, ethylene, and others listed above.

Q: How often should fittings be inspected?

A: Regular visual inspections and periodic leak testing are recommended. Follow manufacturer guidelines for replacement intervals.

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