The ZCT Series 2-Way 2-Position Piston Type (Normally Closed) Stainless Steel Solenoid Valve is a premium, heavy-duty automatic valve engineered for modern industrial fluid control systems. Combining the outstanding corrosion resistance of precision-cast stainless steel (SS304) with an advanced piston-guided mechanical configuration, this series is custom-designed for the highly reliable automation of steam, gases, and liquids under strenuous operating conditions.

Operating Principle: Being a Normally Closed (NC) valve, the internal pilot orifice remains closed when the system is de-energized. The main valve piston is pressed tightly against the seat by both the force of the return spring and the fluid pressure itself, effectively isolating the media. When the electromagnetic coil receives an electrical signal, it generates a robust magnetic field that instantly lifts the plunger, opening the pilot orifice. The fluid pressure inside the upper piston cavity is released immediately through this pilot hole, establishing a severe pressure differential across the piston. The upstream fluid pressure overcomes the combined force of the spring and piston weight, pushing the main piston upward to the fully open state. Once power is cut, the pilot orifice seals again, pressure rebuilds in the upper chamber, and the spring swiftly drives the piston downward to ensure tight shutoff.

Product Image:ZCT 2-Way 2-Position Piston Type (Normally Closed) Stainless Steel Solenoid

Heavy-Duty Piston Assembly for Extended Lifespan: Traditional diaphragm valves fail prematurely in steam applications due to elastomer baking, hardening, and tearing. The ZCT series counters this with a solid metal piston setup paired with high-performance wear rings, offering a mechanical lifespan 3 to 5 times longer than diaphragm alternatives.

True Zero-Differential Pressure Operation: The sophisticated internal static balancing orifice enables the valve to snap open smoothly even when line pressure is completely absent (0 bar). It is the perfect choice for gravity-drained systems, low-pressure networks, and storage tank breathers.

Precision Cast SS304 Flow Passages: The main valve body features industrial-grade SS304 investment casting. Smooth, hydrodynamic internal flow channels minimize pressure drops and optimize flow rates, providing excellent resistance against cavitation and chemical degradation.

Continuous Duty Coils with Rapid Response: The industrial-grade encapsulation protects the internal windings from moisture and thermal shock. The valve delivers extremely fast response times—opening and closing within 30 to 80 milliseconds.

Structure Diagram:ZCT 2-Way 2-Position Piston Type (Normally Closed) Stainless Steel Solenoid

Specification Sheet

Outline Diagram:ZCT 2-Way 2-Position Piston Type (Normally Closed) Stainless Steel Solenoid

Outline Dimension Table   （Unit:mm）