Q22HD Series Pneumatic Externally Piloted Valve
- Professional Q22HD series pneumatic externally piloted valve
- 2/2-way normally closed piston design
- High-flow capacity for steam, air, and liquids
- Reliable zero-pressure differential startup
- Durable brass or stainless steel body construction
- High-temperature resistance up to 180°C (with PTFE seals)
- External pilot-driven for superior reliability
- Port sizes available: 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2"
- Ideal for textile dyeing, food processing, and sterilization equipment
Q22HD Series: Robust Externally Piloted Control for Challenging Media
The Q22HD series is a heavy-duty 2-port 2-position (2/2-way) pneumatic externally piloted valve. Unlike standard direct-acting solenoid valves, the Q22HD utilizes an external air pilot signal to drive a high-force piston mechanism. This design makes it exceptionally reliable for controlling high-temperature fluids, viscous media, and systems with high flow requirements.
Key Technical Features & Engineering Highlights
Externally Piloted Piston Design: By separating the pilot air from the main fluid, the Q22HD series can handle aggressive or high-temperature media (like steam) that would typically damage the coils of a standard solenoid valve.
Zero Differential Pressure Startup: The piston-driven architecture allows the valve to open and close reliably starting from 0 bar pressure, making it perfect for gravity-fed systems or low-pressure tanks.
High Flow Capacity (High Cv): The large internal orifice and streamlined flow path provide high flow rates with minimal pressure drop, outperforming many standard diaphragm valves of the same port size.
Superior Media Compatibility: Available in High-Quality Brass or Stainless Steel bodies with high-grade seals (PTFE/Viton), making it suitable for air, water, hot water, steam, light oil, and certain chemical fluids.
Fast & Stable Actuation: The pneumatic pilot ensures rapid response times and stable switching, even in high-frequency industrial cycles.
Durable Construction: Built for harsh environments, the Q22HD series features a rugged body design that resists mechanical impact and environmental corrosion.
Technical Specifications Overview
Primary Industrial Applications
The Q22HD series is the definitive choice for:
Textile & Dyeing Machinery: Handling high-temperature dyes and hot water.
Steam Systems: Reliable control for boilers, sterilizers, and industrial irons.
Water Treatment: Large-volume fluid control in filtration and dosing.
Food & Beverage: Managing steam and liquids in processing and packaging lines.
Chemical Industry: Control of non-corrosive and viscous chemical fluids.