Positioning: Precise, reliable final control elements sized for actual service—not catalogue conditions—backed by emission and fire-safe certifications.
Sizing & Performance
- IEC 60534-2-1 / ISA 75.01 Cv sizing; IEC 60534-8 noise/cavitation prediction
- Characteristics: equal-percentage, linear, quick-open; rangeability & resolution
- Seat leakage: FCI 70-2 (Classes I–VI)
Valve Families
- Globe (single/multi-stage, low-noise/cavitation trims)
- Ball (floating/trunnion, segment)
- Butterfly (double/triple-offset metal-seated)
- Angle & severe-service (anti-cavitation, anti-erosion)
Compliance & Options
- Fugitive emissions: ISO 15848-1, API 624
- Fire-safe: API 607 / ISO 10497
- Cryogenic: BS 6364; Clean service: FDA/USP VI materials (on request)
- Materials: WCB/LCB, CF8M/duplex/super duplex, alloys for chlorides/sour
Actuation & Positioners
- Pneumatic, electric, hydraulic; ISO 5211 mounting
- Digital positioners (HART/FF/Profibus), partial-stroke for ESD, tight shutoff options
RFQ Checklist (Control Valves)
Fluid, min/normal/max flow, ΔP & P/T envelope, line size/class, leakage class, emission spec, end connections, materials, actuator fail action, comms & diagnostics.
Integration & Services (How We De-Risk Delivery)
- Assessment → Architecture: I/O & SIF mapping, networks, segregation, cybersecurity zoning (IEC 62443).
- Standards Alignment: Control narratives (ISA-88), alarm philosophy (ISA-18.2), safety lifecycle (IEC 61511).
- Engineering & Build: Detailed design, cabinet build (IEC 60204-1), FAT with simulation and loop checks.
- Site & Handover: SAT/commissioning, cause-and-effect verification, proof-test baselines, operator training.
- Lifecycle: Patch mgmt, backups, spares, KPIs; device analytics, proof-test scheduling, periodic SIL re-verification.
Quick “Spec-to-Quote” Template (paste into your RFQ)
- Scope: DCS / SIS / Instruments / Control Valves (select all that apply)
- Standards: (IEC 62443, IEC 61511, ISA-88/18.2, etc.)
- Process Data: P/T, composition, corrosives, min/nom/max flow or demand
- I/O & Networks: AI/AO/DI/DQ counts, HART/FF/PA, OPC UA/Modbus/PROFINET
- Safety: SIF list, target SIL, voting, proof-test interval
- Mechanical: Line size/class, MOC, leakage/emissions class, end connections
- Docs/Tests: FAT/SAT, 3.1 certs, calibration packs, cybersecurity docs
- Logistics: Incoterms, site constraints, required on-stream date