Swagelok SS-3HNRF4-G is a 316 stainless steel severe service needle valve featuring a union-bonnet construction designed for high-pressure and high-temperature applications. This straight-pattern valve is equipped with a regulating stem and Grafoil stem packing, providing reliable performance in demanding environments with working pressures up to 10,000 psig (689 bar).

Construction and Performance

The union-bonnet design ensures safety and durability in severe service. The valve supports a maximum temperature of 1200°F (648°C) at a pressure of 3085 psig. The standard cleaning and packaging (SC-10) process ensures the valve meets industrial cleanliness requirements.

Technical Specifications

Specification	Detail
Body Material	316 Stainless Steel
Orifice	0.156 in
Handle Style	Aluminum Bar
Stem Tip Material	316 Stainless Steel
Room Temp Pressure	10,000 PSIG @ 100°F (689 BAR @ 37°C)
Max Temp Pressure	3,085 PSIG @ 1200°F (212 BAR @ 648°C)
Connection Type	1/4 in. Female NPT (Both ends)

Safe Product Selection

The complete catalog contents must be reviewed to ensure safe product selection. Total system design—including function, material compatibility, adequate ratings, and proper installation—is the responsibility of the system designer and user.

Component Compatibility

Do not mix or interchange Swagelok products or components with those of other manufacturers, including Swagelok tube fitting end connections, unless they are governed by industrial design standards.