Product design and material selection
Material grade alone does not establish a complete valve specification. Confirm the pressure boundary, seats, stem, bore, end connections and actual project conditions before selecting a construction.
Technical selection checklist
| Design requirement | Double Block and Bleed Ball Valve refers to double block and bleed isolation arrangement. For an inquiry specifying A351 CK20, the construction and the material must be reviewed independently. Single-ball DBB and double-ball DBB designs are not automatically interchangeable. |
|---|---|
| Material-grade review | A351 CK20 belongs to the cast stainless steel keyword family in the supplied directory. Cast CF grades have different ASTM product-form designations from forged F grades. Verify exact casting grade and requested examinations. |
| Engineering checklist | For this valve construction, check isolation arrangement, seat philosophy, cavity bleed position and applicable DBB/DIB requirements. For this material family, Specify ASTM cast designation, casting examination, allowable body configuration and required testing. |
| Application and selection | Possible selection context: isolation points requiring a specified block-and-bleed scheme. Final suitability cannot be determined from material grade and valve design keywords alone. Confirm the process medium, size, differential pressure, temperature, bore and valve performance requirements. |
| 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 A351 CK20 automatically qualify this valve for a corrosive service?
No. Grade, temperature, pressure, medium chemistry, seat and trim materials all require review.
Can CK20 Double Block and Bleed 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.
