Description
ASCO JB8263H59 2-Way Normally Closed Solenoid Valve Overview
The ASCO JB8263H59 is a direct-acting, 2-way normally closed solenoid valve engineered for demanding steam and hot water applications. Built with a durable brass body and Teflon seals, this valve delivers reliable shutoff performance in commercial and industrial HVAC and hydronic systems. The NEMA 4X-rated enclosure with integrated junction box provides superior protection against moisture, dust, and corrosion — making it an ideal choice for harsh or wet environments.
Key Features
- 2-Way Normally Closed (N/C) configuration — valve closes when de-energized for fail-safe operation
- Direct-acting design — operates without minimum pressure differential, ensuring reliable performance across the full pressure range
- 1/4″ NPT port connections for easy installation into existing pipework
- 120VAC coil voltage for compatibility with standard commercial control circuits
- Flow coefficient (Cv) of 0.35 for precise flow control in small-bore applications
- Rated for 0–90 PSI steam service
- Rated for 0–150 PSI hot water service
- Brass body construction for excellent corrosion resistance and durability
- Teflon seals provide outstanding chemical resistance and long service life
- NEMA 4X enclosure rating — suitable for indoor and outdoor use, resists washdowns and corrosive environments
- Integrated junction box simplifies field wiring and electrical connections
Specifications
- SKU: JB8263H59
- Brand: ASCO
- Valve Type: 2-Way, Normally Closed
- Operation: Direct Acting
- Port Size: 1/4″ NPT
- Voltage: 120VAC
- Cv: 0.35
- Steam Pressure Range: 0–90 PSI
- Hot Water Pressure Range: 0–150 PSI
- Body Material: Brass
- Seal Material: Teflon (PTFE)
- Enclosure Rating: NEMA 4X with Junction Box
Applications
- Steam heating and distribution systems
- Hot water hydronic systems
- Commercial and industrial HVAC controls
- Process control and fluid handling
- Environments requiring NEMA 4X weatherproof or washdown protection
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