1 / 2Exterior of the Truevalve globe valve family; the internal closure element is not shown.
Bellows-Sealed Globe Valve
Metal bellows for external stem sealing
A metal bellows limits leakage to atmosphere along the moving stem. This function is distinct from shutoff across the disc and seat. For a frequently cycled service, provide the operating temperature, differential pressure and expected opening and closing frequency when assessing bellows suitability.
Final selection requires the complete product code and the service conditions.
UNDERSTAND THE APPLICATION
A solution for your application.
Application areas
Hot-fluid lines where stem leakage is a selection concern · Steam and boiler auxiliary lines after duty verification
Selection considerations
Verify pressure-temperature ratings, flow direction and sealing arrangement in the documentation.
Specify the nominal line size and connection standard, together with the need for isolation, regulation or automation. Two valves of the same nominal size may differ in materials or connection dimensions.
MANUFACTURER DATA
Technical specifications
| Pressure class options | PN16, PN25 or PN40 |
| Body / bonnet | GG25 or GGG40 |
| Stem | AISI 304 / AISI 316 |
| Published temperature range | −10 to +220 °C; verify with the chosen pressure class and material. |
Evaluate pressure and temperature together. Verify the ratings that apply to the selected body, sealing materials and end connections in the model-specific technical document.
DOWNLOADABLE RESOURCES
Technical documents
Open manufacturer PDFs directly from our website and save them to your device. Check the model and document revision.
Frequently asked questions
Does the bellows specify the shutoff leakage class?+
No. The bellows addresses external stem sealing. Specify the required seat leakage class separately.
What information is needed for a bellows-sealed valve enquiry?+
Provide DN, pressure class, medium, normal and maximum temperature, and cycling frequency. Use these to check the body and bellows for the service.
What should I verify before specifying Truevalve Bellows-Sealed Globe Valve?+
Evaluate pressure and temperature together. Verify the ratings that apply to the selected body, sealing materials and end connections in the model-specific technical document.
What should I include in my quotation request?+
Line size and connection standard; Fluid, operating pressure and temperature; Isolation or control duty and actuation method. For replacement equipment, also provide the nameplate and connection dimensions.
Where can I check the technical drawing and dimensions?+
Open the manufacturer PDF in the Technical Documents section. Match the relevant entry to the product type, nominal size and variant code. Not every option in a family catalogue belongs to the same product.
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