The RSP-A series small-scale diaphragm 2/2-way solenoid valve is a direct-acting or semi-direct-acting automated shut-off valve designed explicitly for microfluidic control systems, modular equipment integration, and high-frequency switching applications. Configured as a normally closed (NC) valve, its operational sequence is "opens when energized, closes when de-energized." The paramount technical benefit of this series is its ability to start at zero differential pressure (0 bar). It provides absolute and reliable rapid on-off control even in pipelines with zero pressure, gravity-fed networks, or ultra-low pressure environments. The valve body is constructed from high-strength eco-friendly POM (polyoxymethylene engineering plastic), high-precision brass, or SS304 stainless steel, rendering an exceptionally compact and lightweight profile. This allows it to be perfectly embedded into medical instruments, water purification equipment, vending machines, coffee makers, and various industrial microfluidic pipelines. Paired with a high-performance, low-power integrated electromagnetic coil, it operates stably under working pressures ranging from 0 to 16 bar, ensuring tight, zero-leakage isolation for water, air, neutral gases, and low-viscosity fluids.

Product Image:RSP-A Small Compact Diaphragm (Normally Closed) Solenoid Valve

Feature

Zero-Pressure Startup & Universal Application: Utilizing a direct-acting or semi-direct-acting diaphragm configuration, the electromagnetic force directly actuates the plunger or linked diaphragm. It functions independently of the medium's internal pressure drop, perfectly solving the operational failure inherent to pilot valves in micro, low-pressure lines.

Compact Profile & High-Density Integration: Tailored for space-constrained industrial enclosures and equipment interiors. The valve exhibits minimal volume and weight. Multiple port options—including standard micro-threads, push-in fast fittings, or hose barbs—greatly simplify interior space allocation and pipeline routing.

High-Frequency Response & Quick Actuation: Due to the lightweight moving parts and short stroke distance, the valve opening and closing actions complete within milliseconds (ms). It provides highly responsive, instantaneous cycling and excellent repetitive positioning accuracy, making it ideal for high-frequency dosing, blending, and volumetric filling systems.

Superb Material Compatibility & High Purity: Body options encompass POM engineering plastic, brass, or stainless steel, paired with NBR, EPDM, or modified FKM elastomeric diaphragms. The configuration guarantees high wear resistance, extended fatigue life, and outstanding chemical stability, preventing any degradation or impurity precipitation into the handled media.

Low Power Consumption & High Safety: The precisely engineered solenoid coil generates minimal heat with low power metrics. Equipped with various electrical interfaces such as spade terminals, wire leads, or mini-DIN boxes, it displays robust moisture-proof and dust-proof insulation to facilitate long-term continuous machine operation.