Research Library

This is the source index for our valve catalog and model specification pages: the public documentation we collected and used to build published specification fields. Entries are listed at domain level; every published specification field carries an internal evidence record with the exact source URL, excerpt and collection date — see the editorial & research policy for the full sourcing and correction rules.

What is in the library

The current build draws on 273 source domains anchoring 7,608 specification fields across the product catalog and model specification pages:

• Manufacturer documentation: 216 domains
• Manufacturer technical documentation: 2 domains
• Industry / professional reference: 70 domains
• Engineering reference: 4 domains
• Application note: 3 domains

Domains marked "product catalog" document family-level specification fields; domains marked "model specifications" document individual model/identifier pages. Domains can appear in both layers.

Source domains

How to read this index

• Domains are plain text on purpose: these are collected references, not link exchanges. Listing a domain does not imply endorsement, partnership or approval by the publisher, and a supplier or peer value is used only for the named product it documents — never as an industry rule.
• The "fields anchored" count is the number of published specification fields whose internal evidence record points at that domain in the current build. It grows and shrinks with the catalog; it is not a page count.
• Unclassified sources (if any appear in a future build) cannot support a strong claim until reviewed.
• Spotted an error? Corrections are accepted by page URL plus the disputed statement and a supporting document — see the editorial policy and the contact page.