Operating challenges
- Chemical compatibility of all wetted parts
- Fugitive-emission requirements when specified
- Fire-safe or anti-static construction where applicable
- Throttling or frequent-cycling duty
- Drain, vent and cavity-cleaning requirements
Operating context
Translate process conditions into valve requirements
Chemical and refinery valve selection depends on corrosion, fugitive-emission expectations, cycling frequency, cleanability, temperature and the interaction between body, trim and sealing materials.
All constructions, pressure-temperature limits, certifications and inspection requirements must be confirmed against the specific product and purchase specification.
Relevant valve families
- Ball valves
- Globe and bellows-seal valves
- Butterfly valves
- Check valves
Materials & standards review
- Stainless and duplex stainless steels
- Selected nickel alloys for severe corrosion
- PTFE, reinforced PTFE, graphite and metal-seat options
- Applicable API / ASME / ISO product requirements
- Project corrosion allowance and coating specification
Procurement checklist
What SMD Valves needs for a useful technical review
More complete RFQ data reduces assumptions, qualification loops and late design changes.
01Fluid / medium and composition
02Design pressure and temperature
03Valve size, pressure class and end connection
04Body, trim, seat and sealing requirements
05Applicable product and project standards
06Actuation, accessories and fail position
07Inspection, witness and document requirements
Refinery & Chemical Processing
Submit the service conditions and document requirements.
SMD Valves will review the valve configuration, materials, applicable standards and inspection scope before quotation.