Valve Datasheets for Procurement: What Buyers and Sellers Need to Know

The valve datasheet is the primary commercial and technical document governing the procurement of industrial valves. From the buyer's perspective, it communicates all the requirements the valve must meet, enabling vendors to provide technically compliant bids on a comparable basis. From the seller's perspective, it defines exactly what product must be supplied, what documentation must be provided, and what tests must be performed. Incomplete or ambiguous datasheets lead to non-compliant bids, technical clarification rounds that delay procurement, and ultimately to valves that may not meet the application requirements. Understanding what information must be included in a complete datasheet from both perspectives improves procurement efficiency and reduces technical risk.

Buyer's Perspective: What to Specify

Buyers should specify all process conditions (pressures, temperatures, flow rates, fluid properties) needed to size and rate the valve correctly, along with the required valve type, size, pressure class, materials, end connections, and any special design features. The specification should clearly indicate applicable design standards (ASME B16.34, API 600, ISO 17292) and testing standards (API 598), as well as any special testing requirements beyond the standard scope. Actuator requirements including fail position, actuating medium and pressure, operating time, and accessories must be completely specified. The documentation package required must be itemized: material test certificates, test reports, installation and maintenance manual, dimensional drawings, and any additional certifications. Clarity on what is mandatory versus preferred prevents costly add-ons during bid evaluation.

• Process data: fluid, pressure, temperature, flow rate at all operating conditions

• Valve type and configuration: gate/globe/ball/butterfly, body pattern, end connections

• Materials: body, trim, packing, gaskets, with specific ASTM grades or equivalent

• Standards compliance: design standard, testing standard, special requirements

• Actuator data: type, fail position, instrument air pressure, electric power supply, operating time

• Documentation: MTRs, test reports, manuals, special certifications (SIL, fire-safe, fugitive emissions)

Seller's Perspective: Technical Deviations and Clarifications

Sellers reviewing valve datasheets should identify any items they cannot supply exactly as specified and document these as technical deviations in their bid response. Common deviation areas include equivalent material grades (offering ASTM A351 CF8M versus specified EN material equivalent), alternative stem packing (offering PTFE chevron when graphite is specified without clear justification), or dimensional variations from standard face-to-face that differ from the specified standard. Technical deviations should be clearly identified and technically justified, not buried in bid documentation. Offering alternatives with technical explanation of equivalence or superiority is preferable to simply noting a deviation without context.

Datasheet Review and Bid Evaluation

Technical bid evaluation compares each vendor's offering against the datasheet requirements line by line to identify deviations, clarify ambiguities, and assess technical risk. Material certifications offered, test scope proposed, and documentation package commitments should all be evaluated, not just the price. Valves offered at significantly lower prices often involve material substitutions, reduced testing scope, or less comprehensive documentation that creates risk in critical or high-consequence applications. The total cost of ownership, including maintenance cost, spare parts availability, and installed reliability, is a more complete evaluation criterion than purchase price alone for valves in critical services.