Diaphragm Packless Valves

Designed to be leak-resistant, these valves are used with several gases, including Hydrogen (H₂) and Argon (Ar), as well as Propane (LPG) and Butane (n-Bu). They are commonly found in research facilities that depend on reliable shutoff without traditional stem packing. These valves also serve a secondary purpose in the HVAC industry .

Diaphragm packless valves are available with either Stainless Steel or Brass bodies. Depending on the gas service and application, our sales team can recommend the best option to keep your project cost-effective and on schedule the first time.

Packless Valve Technical Sheets

• 6411 Series
• 7000 Series
• 8000 Series
• HVAC Packless

Evergreen’s Most Purchased Packless Valves

• 707432661-35S
• 807432061-28NT
• A14833
• A14835