Baker Hughes 496-258 / 400145255-999-0000 Valve Position Limit Switch, ATEX, IP66/IP67
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The Baker Hughes Masoneilan 496-258 (Part Number: 400145255-999-0000) is an intrinsically safe electromechanical valve position limit switch designed for monitoring valve positions in industrial control systems. Part of the Masoneilan 496 Series, it incorporates two mechanical SPDT microswitches using the Honeywell BZ-2R-72-A2 switch type. The unit features an IP66/IP67 enclosure and ATEX II 1 GD intrinsic safety marking for use in appropriately certified hazardous-area installations.
| Brand | Baker Hughes |
| Manufacturer | Dresser Produits Industriels S.A.S., France |
| Model Number | 496-258 |
| Part Number (N° Article) | 400145255-999-0000 |
| Product Series | Masoneilan 496 Series |
| Product Type | Electromechanical Valve Position Limit Switch |
| Switch Type | BZ-2R-72-A2 |
| Switch Manufacturer | Honeywell |
| Switch Configuration | 2 Mechanical SPDT Microswitches |
| Protection Method | Intrinsic Safety (Ex ia) |
| ATEX Category | II 1 GD |
| ATEX Certificate | INERIS 06ATEX0071X |
| Enclosure Protection | IP66 / IP67 |
| Ambient Temperature (Nameplate) | -55 to +80 °C |
| Intrinsic Safety Input Limits (DC) | Ui = 30 V DC, Ii = 0.5 A |
| Intrinsic Safety Input Limits (AC) | Ui = 90 V AC Peak, Ii = 1.4 A |
| Internal Capacitance / Inductance | Ci = 0 F / Li = 0 H |
The Masoneilan 496-258 is designed for valve position indication and end-of-travel detection on compatible rotary and reciprocating industrial valves. Its two mechanical microswitches allow independent switching of two electrical circuits, providing position feedback to industrial control and monitoring systems. The 496 Series is used in industrial applications including power generation, petrochemical processing, refining, and oil and gas facilities.
Apexon Supply provides B2B sourcing and replacement support for Baker Hughes Masoneilan valve instrumentation and industrial limit switches. For replacement applications, verify the complete model and part number, switch configuration, mounting arrangement, hazardous-area certification requirements, and electrical safety parameters. Intrinsically safe installations must use suitable certified associated equipment and comply with applicable installation requirements.
To request a quotation for Baker Hughes 496-258 / Part Number 400145255-999-0000, provide your required quantity and application requirements. Contact Apexon Supply for B2B sourcing, technical identification, and replacement procurement support.
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