High-Pressure CGA350 Brass Valve – Hydrogen & CO Service | 3,360–4,000 PSI | Forged Brass Construction

This is a new Sherwood CGA350 high-pressure valve for hydrogen and carbon monoxide service, built with a forged brass body and rated for working pressures between 3,360 and 4,000 PSI. The valve features a unitized plug pressure relief device, enhanced metal-to-metal seal below the bonnet threads to prevent pressure buildup in the thread area, and a direct-drive stem with optimized O-ring seals for low-friction operation. It is manufactured using automated assembly and testing processes and is 100% helium leak tested to meet international performance standards. Valve Construction: Heavy-duty forged brass body for durability and high-pressure applications Precisely machined internal components for optimal sealing and performance Unitized plug Pressure Relief Device (PRD) for excellent flow, proper assembly, and tamper resistance Enhanced metal-to-metal seal below bonnet threads prevents pressure buildup in thread area Direct-drive stem design with optimized O-ring (GSV) or double O-ring (GSVH) seals for low-friction, smooth operation Inlet tapped (1/4" NPT) for dip tube installation if required Designed and tested for long service life under demanding conditions Specifications: Gas Service: Hydrogen (H₂) and Carbon Monoxide (CO) Outlet: CGA350 Inlet Thread Size: 3/4" NGT Outlet Thread Size:.825-14 NGO LH Ext. Maximum Working Pressure Options: 3,360 / 3,775 / 4,000 PSI Operating Temperature Range: -50°F to +149°F Storage Temperature Range: -65°F to +155°F Leak Rate (Internal/External): 1×10⁻³ atm cc/sec Cv Flow Factor: 0.690 (standard) Cycle Life: Minimum 2,000 cycles Torque Ratings: Closing Torque: 20–30 in.-lbs. Operating Torque: 10–20 in.-lbs. Bonnet Installation Torque: 50–60 ft.-lbs. Handwheel Nut Installation Torque: 25–45 in.-lbs. PRD Installation Torque: 25–35 in.-lbs. PRD Flow Capacity: 60 CFM @ 100 PSI Key Features & Benefits: Reliable performance for high-pressure gas systems Low operating torque for smooth manual operation Extended cycle life for long-term service Meets international safety and performance standards Ideal for OEMs, gas distributors, and high-purity system integrators Applications: Perfect for use in hydrogen fueling systems, carbon monoxide distribution, industrial gas cylinders, specialty gas supply, and high-pressure gas control systems.

Inspection Pre-purchase inspections are welcome during normal business hours by appointment arranged in advance. We can provide complimentary transportation from DFW Airport and back if you would like to send someone to see the equipment in person. We can also walk through the item over a video call for domestic or international buyers. We are on US Central Time. Shipping and loading The equipment is located at our yard south of Dallas, Texas. We can assist with shipping arrangements. Loading is provided at no charge for equipment under 15,000 lb when scheduled in advance. Equipment over 15,000 lb requires a crane, which is arranged and paid for by the buyer. Payment Payment in full is required FOB our yard in South Dallas. A verifiable cashier's check is accepted for collection in person. For release to a third-party shipper we require a wire transfer cleared in our account before the equipment leaves the yard.