LCB Trunnion Mounted Ball Valve: construction and material review
A trunnion-mounted ball valve is defined by its valve construction, while carbon, low-temperature or alloy steel selection depends on the process conditions and the specified material standard. Specify the exact seat isolation philosophy and require supporting test procedures. This page is an engineering enquiry guide, not a confirmed stock or approved manufacturing specification.
Technical selection checklist
| Design requirement | Construction review: seat energization, cavity relief, DBB/DIB requirements, stem sealing, torque at maximum differential pressure and emergency sealing provisions. Verify drawing, pressure class, end connection and operating method for the selected size. |
|---|---|
| Material-grade review | Material review: Check design temperature, impact-testing requirements, corrosion allowance and any sour-service restrictions in the project specification. Confirm wetted versus pressure-retaining parts separately; a trim material does not establish body grade. |
| Engineering checklist | For trunnion-mounted ball valve: seat energization, cavity relief, DBB/DIB requirements, stem sealing, torque at maximum differential pressure and emergency sealing provisions. For the specified grade: obtain traceability, manufacturing route and project-specific inspection scope. |
| Application and selection | Fit for service depends on medium composition, operating/maximum temperature, pressure differential, solids, cycling and shutoff performance. Specify the exact seat isolation philosophy and require supporting test procedures. |
| Documents to request | Request the drawing, technical datasheet, material bill of materials, end connection, seat construction, proposed tests, material certification and actuator details when relevant. Grade-specific availability and test conditions must be confirmed by a formal quotation. |
Information required for quotation
Send your RFQ, datasheet or MTO with the required ASTM or UNS material, nominal size, pressure class, end connection, seat material, design temperature, fluid service and quantity. Include inspection and document requirements if specified by your project.
Frequently asked questions
Does A352 LCB automatically qualify this valve for a corrosive service?
No. Grade, temperature, pressure, medium chemistry, seat and trim materials all require review.
Can LCB Trunnion Mounted Ball Valve be ordered in any ASME pressure class?
Not by assumption. Size, pressure class, end connections and actual design availability must be confirmed.
Related enquiry specifications
Pressure, connection and actuator options below are search and RFQ variations, not confirmed supply configurations.
Related terms: Base material and construction keyword
Industrial valve reference images
Images show representative valve constructions; they do not certify the material grade or exact configuration named on this page.
