Catalog>Foxboro>Measurement and Instrumentation>Instrumentation>Foxboro Valve Positioners>SRD991>Foxboro – Intelligent valve Control, Valve Positioner, display, intrinsically Safe Ex ia
| Range of Product | Valve Positioners |
| Product or Component Type | Valve positioner |
| Communication port protocol | HART, 4...20 mAProfibusFOUNDATION fieldbus |
| Market Segment | Process industry |
| Housing material | Aluminium alloy |
| Pneumatic connection type | 0.25 inch 18 NPTG 1/4 |
| Network and machine diagnosis type | Valve predictive maintenanceValve footprintOn-line friction |
| Input pressure | 1.4...6 bar |
| Maximum pressure | 6 bar90 psi |
| Stroke range | 8...260 mm |
| Maximum hysteresis | 0.3 % |
| Linearity | < 0.4 % of the travel span |
| Pneumatic operation | Single actingDouble acting |
| Operating angle | 0u202695 u00b0 |
| Ambient Air Temperature for Operation | -40u2026176 u00b0F (-40u202680 u00b0C)-40u202680 u00b0C (-40u2026176 u00b0F) |
| IP Degree of Protection | IP66 |
| NEMA Degree of Protection | NEMA 4X |
| Product certifications | ATEXINMETRONEPSIPESOEACKOSHA |
| Unit Type of Package 1 | PCE |
| Nbr. of units in pkg. | 1 |
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