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Yokogawa NFDV557‑SS2
- Product Series: NFDV Series Industrial Flow Monitoring / Valve Control Components
- Product Name: NFDV557‑SS2 Stainless Steel Flow Switch / Flow Monitoring Unit
- Product Brief: A Yokogawa industrial flow monitoring device, utilizing stainless steel construction for reliable flow detection, switching output, and flow status monitoring in process pipelines.
Detailed content
- Technical Specifications:
- Model code: NFDV557‑SS2
- Material code: SS2 (316L stainless steel wetted parts)
- Flow detection principle: Paddle‑type flow switch mechanism
- Connection standard: Industrial pipe thread connection
- Functional Features: Flow presence/absence detection, relay switching output, low‑flow alarm triggering, bidirectional flow monitoring capability
- Performance Parameters:
- Operating flow range: Adjustable low‑flow to high‑flow industrial liquid flow rates
- Operating temperature range: −20 °C to 120 °C
- Maximum working pressure: 1.6 MPa
- Switch output rating: 250 V AC / 5 A relay contact
- Material Composition: 316L stainless steel wetted components, cast stainless steel housing, brass internal mechanical parts, nitrile rubber sealing elements
- Structural Features: Paddle‑insertion pipeline‑mounted structure, mechanical‑electronic switching unit, compact inline design
- Working Principle: Fluid flow pushes internal paddle mechanism; mechanical displacement triggers micro‑switch to output electrical on/off signal indicating flow status; paddle spring returns mechanism under no‑flow conditions
- Advantages: Corrosion‑resistant stainless steel construction, mechanical reliability without power requirement, simple structure, low maintenance, wide liquid compatibility
- Applicable Industries: Petrochemical, water treatment, HVAC systems, industrial cooling circuits, chemical processing plants
- Installation Requirements: Horizontal or vertical pipeline installation; proper paddle insertion depth matching pipe diameter; flow direction compliance with marking
- Usage Precautions: Avoid solid particle‑rich media causing paddle jamming; regular inspection of paddle and spring components; prevent cavitation‑induced mechanical damage
