The YSE series pilot-operated stainless steel high-pressure solenoid valve (nominal diameter ranging from DN6 to DN25) is a high-end, high-pressure fluid control device specially developed for medium-to-high pressure and large-flow gas transmission, hydraulic control systems, high-pressure cleaning equipment, and automated pipelines carrying various light and low-viscosity oils (viscosity less than or equal to 20cst). As a core executive element in high-pressure automation control loops, this series features deep structural optimization targeting common industry pain points under 160bar (16MPa) high static pressure and large-bore working conditions, such as valve failure to actuate due to insufficient electromagnetic force and seal erosion caused by excessive flow velocity. The entire series comes standard with high-specification SS304 stainless steel bodies and offers two highly reliable interface types: G thread and NPT thread.

This series of valves utilizes a pilot-operated control mechanism and belongs to the normally closed automatic valve type. Distinct from direct-acting solenoid valves that rely on electromagnetic force to directly lift the valve core, the core advantage of pilot-operated valves lies in the ingenious utilization of the medium's own pressure differential to drive the main valve core. When the electromagnetic coil is de-energized, the pilot hole is closed under the action of the return spring force. The medium enters the cavity above the main piston through the fluid channel, forming a balanced or top-high-bottom-low pressure distribution across the upper and lower ends of the piston. Under the combined action of the main spring force and the medium pressure, the main piston is tightly pressed against the main valve seat, achieving absolutely reliable, zero-leakage shut-off.

When the electromagnetic coil is energized, it generates an electromagnetic attraction force that first opens the pilot hole. At this moment, the medium in the cavity above the main piston quickly relieves pressure through the pilot hole. Since the lower side of the piston still bears the high pressure from the inlet end, a clear pressure differential is instantly formed between the upper and lower sides of the main piston. The upward thrust generated by this pressure differential directly overcomes the main spring resistance and the piston's dead weight, rapidly pushing the main piston upward. The main valve port is instantly fully opened, and the medium restores large-flow, unhindered passage. Once the coil is de-energized, the pilot hole closes within milliseconds, pressure rebuilds above the main piston, driving the main piston downward at high speed to reset and lock, completing a rapid and rigid cut-off cycle.

Product Image:YSE 2-Way 2-Position Pilot-Operated Stainless Steel High Pressure Solenoid Valve

Feature

Pilot-operated pressure differential drive structure, achieving low-power actuation under large-bore and high-pressure states: Traditional direct-acting high-pressure valves require extremely massive electromagnetic coils to counteract high pressure at large bores (above DN6). The YSE series adopts a pilot-operated mechanism, perfectly utilizing the fluid's own energy, so that it only needs to be configured with a conventional power consumption electromagnet to easily control high-pressure media up to 160bar. This greatly reduces energy consumption and coil heat generation while ensuring a large flow rate.

SS304 all-stainless steel piston structure, powerful yield resistance and anti-scouring performance: Targeting the extreme scouring force and cavitation damage generated when 160bar high-pressure fluid flows through large-bore valve ports, the entire series of valve bodies, pilot valve cores, and main piston assemblies are precisely manufactured from high-quality SS304 stainless steel. The stainless steel valve body possesses extremely high yield strength and hardness, never undergoes microscopic deformation under high pressure, and perfectly eliminates the common phenomenon in high-pressure valves where the valve cannot close tightly due to body deformation or piston jamming.

Unique buffer and anti-cavitation design, effectively extending service life under high-pressure and large-flow conditions: Targeting the liquid hammer (water hammer) phenomenon and cavitation damage that high-pressure large-bore valves are extremely prone to generate at the instant of opening and closing, this series has undergone precise fluid mechanics optimization for the flow channels between the pilot hole and the main cavity. By rationally designing buffer damping, the impact of sudden pressure changes on the pipeline is slowed down, protecting both downstream equipment and the solenoid valve's own seals.

International high-pressure thread standards, ensuring absolutely long-lasting and safe system connection: The product provides G and NPT industrial high-pressure threads. The thread processing accuracy reaches the micron level, capable of withstanding severe pipeline vibration and thermal expansion and contraction under ultra-high pressure conditions. It achieves seamless original-position tightening with various domestic and overseas high-pressure pump stations and high-pressure hydraulic base machines, eliminating common hazards of high-pressure pipelines such as interface bursting and micro-leakage.