The ASCO™ 221 Series is a uniquely engineered slow-closing solenoid valve designed to maximize flow and throughput in demanding commercial applications. Its specialized design effectively mitigates water hammer—a common cause of system damage and pressure spikes—by slowing the disc’s closing speed.
This versatile valve handles both hot and cold water services, simplifying your inventory and maintenance needs. It is a reliable solution trusted for high- and low-temperature applications in laundry, molding, sterilizers, and autoclaves.
Prevents Water Hammer Damage: An integrated snubber slows the valve disc’s closing speed, protecting your piping system from damaging shock waves and pressure spikes.
Simplifies System Design: By significantly reducing pressure peaks, it often eliminates the need for additional external suppressors or controls in most water systems.
Dual Service Capability: A single valve model is suitable for both hot and cold water, reducing parts inventory and increasing application flexibility.
Built for Durability & Easy Maintenance: Features a rugged brass body and is designed for quick, easy servicing to minimize downtime.
Hot Water Performance: Reliably handles hot water service with differential pressures up to 10 bar (150 psi) at 100°C (210°F).
The table below outlines the core specifications for the ASCO 221 Series. Specific parameters may vary by model.
| Attribute | Specification |
|---|---|
| Valve Function / Type | 2-way, 2/2 (Normally Closed or Normally Open) |
| Actuation | Solenoid, Pilot Operated |
| Body Material | Brass |
| Media | Water (Hot and Cold) |
| Pipe / Port Sizes | Available from 3/8″ up to 2 1/2″ NPTF |
| Flow Coefficient (Cv) | Ranges: 2.0 – 6.0 Cv; 6.0 – 14.0 Cv; >14.0 Cv |
| Maximum Pressure | Vacuum to 34.5 Bar (500 PSIG) |
| Voltage Options | Wide range of AC and DC voltages available (e.g., 24 VDC, 110/115/120/240 VAC) |
| Operating Environment | Suitable for Corrosive, Hazardous, Indoor, and Outdoor locations |
| Standards & Approvals | UL, CSA; NEMA Enclosures Types 1, 2, 3, 3S, 4, 4X, 6, 6P, 7, 9 |
For more detailed technical information, specific model selection, or pricing on the ASCO™ 221 Series Slow-Closing Solenoid Valves, please contact the sales team at Kateteco. We are here to help you find the optimal solution for your application.
Have questions about preventing water hammer or selecting the right valve? Reach out to the Kateteco sales team today.
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KateTeco (Tianjin) Technology Co., Ltd. serves as an outstanding partner in the field of industrial fluid automation, specializing in the introduction and integration of high-end valves and instruments. We are committed to providing customers with safe, reliable, and intelligent system solutions. By leveraging global leading product resources and supported by systematic professional training and on-site technical assistance from Emerson’s experienced engineers, we ensure that customers can respond promptly and accurately to technical challenges.
With full lifecycle services covering installation, commissioning, operation, maintenance, and replacement, we deliver a true one-stop service system. This allows our customers to enjoy seamless, efficient, and high-quality assurance, supporting enterprises in achieving stable operation and continuous upgrades.
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