Start with the operating requirement
Industrial valve selection should connect the valve type with pressure class, material, end connection, service temperature, sealing requirement, operation and inspection scope.
What to compare
Review the piping class, process conditions, design standard, body and trim materials, end connection, pressure-temperature rating, testing and documentation together. Do not select a valve from one specification item alone.
What to include in the RFQ
- Valve type and nominal size
- Pressure class or rating
- Body, trim and seat material
- End connection
- Operation or actuator requirement
- Service fluid and design temperature
- Project standard and inspection requirements
Buyer takeaway
Use the comparison to narrow the product family first. Then issue the RFQ with complete service and specification data. This reduces technical clarification after quotation.