Product Overview
The ASCO NFIS83278302 is a compact, intrinsically safe solenoid valve from the reliable 8327 series (also known as Series 327). Built as a 3/2-way direct-acting unit with no minimum operating pressure requirement, it features a balanced poppet design that delivers solid flow performance while keeping power consumption low. This model suits applications needing dependable control in potentially explosive atmospheres, with its stainless steel construction and certified protection for hazardous zones.
Features
- Direct-acting balanced poppet for consistent operation without pressure minimums.
- Intrinsically safe design (Ex ia) suitable for Zone 1/21 and Zone 2/22 hazardous areas.
- Stainless steel body for strong resistance in demanding conditions.
- Screw terminal coil setup for straightforward electrical connections.
- Low power consumption, helping reduce energy use in control systems.
- Robust enclosure offering IP66/67 protection against dust and water.
- Switch-off peak voltage suppression on DC versions.
Technical Specifications
Function: 3/2-way universal (can be used NC, NO, or diverter)
Port Size: 1/4" (DN8)
Orifice: 5.7 mm
Body Material: Stainless steel (316L)
Seals/Resilient: FPM (Viton)
Operating Pressure: 0 to max differential pressure (typically up to 10 bar depending on fluid/media; no minimum)
Cv Flow Factor: Approximately 0.49–0.56 (depending on port configuration)
Coil Power: Around 0.5 W (low power for IS version)
Coil Class: H
Ambient Temperature: Standard range typically -20°C to +55°C (extended options available)
Enclosure Protection: IP66/67
Certifications: II2G Ex ia IIC T6 Gb / II2D Ex tb IIIC T85°C Db (intrinsically safe per ATEX/IECEx for hazardous areas)
Voltage: Commonly 24 VDC (other voltages possible)
Fluids: Air, inert gas, water, light oil
Applications
This valve performs well in process industries like oil & gas, refineries, chemical plants, and power facilities where explosion-proof or intrinsically safe piloting is essential. It often serves as a pilot valve for larger actuators, control valves, or shutdown systems in hazardous classified zones.
FAQ
Q: Is this valve suitable for Zone 1 hazardous areas?
A: Yes, its intrinsic safety rating (Ex ia) makes it appropriate for Zone 1/21 and Zone 2/22.
Q: Does it require minimum pressure to operate?
A: No, it's direct-acting with zero minimum operating pressure.
Q: What fluids can it handle?
A: Air, inert gases, water, and light oils—check exact pressure ratings for your media.
Q: How is the electrical connection made?
A: Via screw terminals in the coil enclosure, with cable entry options.
Q: Can it be used for SIL-rated safety systems?
A: The series supports IEC 61508 compliance when fitted with appropriate accessories like exhaust protectors.
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