Swagelok SS-4H-TH3 is a stainless steel bellows-sealed valve designed to isolate system fluids and achieve reliable, leak-tight performance. This valve features a packless design with a welded body-to-bellows seal, making it an ideal choice for applications where maintaining a secure seal to the atmosphere is critical. Constructed with a 316 stainless steel body and 321 stainless steel bellows, it provides excellent material compatibility for general and high-purity services. The straight-pattern (2-way) flow configuration supports a maximum flow coefficient (Cv) of 0.28.

This manual valve is equipped with a green aluminum knob handle and a conical stainless steel stem tip. It is rated for temperatures ranging from -80°F to 600°F (-62°C to 315°C), with a pressure rating of 1000 PSIG at room temperature. Each unit undergoes standard cleaning and packaging (SC-10) and is helium leak tested according to SCS-00020 to ensure integrity.

Technical Specifications

Feature	Specification
Actuator Type	Manual
Body Material	316 Stainless Steel
Bellows Material	321 Stainless Steel
Body Seal	Welded
Connection 1 & 2	1/4 in. Tube Stub (3 in. extension)
Flow Pattern	Straight (2-way)
Max Flow Coefficient (Cv)	0.28
Stem Tip Material	Stainless Steel
Handle Style	Aluminum Knob (Green)
Temperature Range	-80 to 600°F (-62 to 315°C)
Pressure Rating	1000 PSIG @ 100°F (68.9 BAR @ 37°C)

Performance and Design

• Straight Pattern: Optimized for 2-way isolation with manual actuation.
• Welded Seal: Enhances reliability in critical applications by eliminating potential leak paths to the atmosphere.
• Packless Design: Reduces maintenance requirements and minimizes contamination risks in high-purity systems.

Selection & Safety

Total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, and maintenance are the responsibilities of the system designer and user. Do not mix Swagelok products or components with those of other manufacturers.

Testing and Cleaning

• Helium Leak Testing: Conducted according to SCS-00020 standards.
• Cleaning Process: Standard cleaning and packaging (SC-10) for industrial use.