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ValvesFlowserve is an industry-leading provider of valves used in a wide variety of global infrastructure industries.
Hermavalve® Hermetically Sealed Valve
A small bore, forged body globe valve with a body guided disc and a diaphragm sealed construction offering superior leak proof operation and performance. Available in class 1690 from sizes 1/2 to 2-1/2 sizes.
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- Brands:
Edward - Applications:
Condensate Cooling Water, Containment Spray, Core Spray, High Temperature Service, Shutdown Cooling, Power Generation, Primary Coolant, Reactor Feed, Safety Systems, Petroleum Production and Refining - Industries:
Power Generation, Pressurized Water Reactors - Non-safety, Pressurized Water Reactors - Safety, OEM, Boiling Water Reactors Non-safety, Boiling Water Reactors Safety, Steam Systems - Standards:
ISO 9001:2000, ASME (ANSI), ISO, Nuclear - Misc:
High Temp, High Pressure
What is a Hermavalve? A Hermavalve is a hermetically sealed valve that cannot leak to the environment. The Flowserve Edward Hermavalve cannot leak because it is double-seal welded:
- The multi-ply flexible metal diaphragm is seal welded to the bonnet.
- The body-to-bonnet joint is also seal welded.
This construction eliminates any potential leakage through a mechanical joint. This joint is more than just packless, It is hermetically sealed.
Other features of this hermetically sealed valve include:
- High-efficiency flow shape ensures high Cv comparable to or greaten than conventionally packed valves, which has been proven by extensive flow testing
- Ensured lowest possible operating torque due to the non-revolving stem design, which is the only absolute method of avoiding diaphragm caused by rotational forces from a revolving stem
- Two backup stem seals- a packing and the backseat provides backup seals
- Nuclear quality
Available in class 1690 from sizes 1/2 to 2-1/2 inches.
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Flowserve Edward and Anchor/Darling Nuclear Application Valves Product Catalog
Comprehensive Product Catalog for the Flowserve brands of Edward and Anchor/Darling Nuclear Application Valves.
Edward Valves: Hermavalve®: A zero-emissions valve from Edward Valves White Paper
Edward Valves: Hermavalve®: A zero-emissions valve from Edward Valves White Paper
Edward Forged Steel Valves Product Catalog
Comprehensive Product Catalog for the entire Flowserve brand of Edward Forged Steel Valves for commercial applications including Bolted Bonnet Stop Valves.
Series 1878 Manual Globe Valve
| Description: | The 1878 series globe valves feature a one-piece investment cast body/yoke, T-head stem/disc connection, a bore guided disc and a non-rotating stem. |
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Series 800 Globe
| Description: | The 800 Series Globe valve features an investment cast body, oversized stem and a machined backseat. |
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Series 1878 Y-Globe
| Description: | The Anchor-Darling 1878 Y-Globe features a one-piece investment cast body/yoke, T-head stem and disc connection and an integral position indicator. |
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