Pneumatic Components Series

SOLH VCH400 (VCH410) series pilot operated 3-port poppet solenoid valve is customized for medium & high-pressure gas pipelines with max operating pressure up to 5.0MPa. Equipped with high-pressure polyurethane elastic seals and large-size ISO G threads (G1/2, G3/4, G1), it delivers high flow capacity and ≤±2ms response deviation, with outstanding vibration & shock resistance and 10-million-cycle service life. Drip-proof structure reaches equivalent IP65 protection; the NC version automatically vents upon power loss, ideal for high-pressure charging, venting and pressure conversion circuits, and perfectly matched with SOLH VCHR high-pressure regulators. Only applicable to clean dry compressed air and inert gas. Coil-down mounting is prohibited, and periodic cycling actuation is required to avoid poppet adhesion. It serves as reliable control component for industrial high-pressure air charge & vent equipment.

Version 1｜Official Product Page Long Copy (SEO-focused, ~290 words for independent website detail page) SOLH 2V series 2/2-way brass fluid solenoid valves are versatile electromagnetic on-off valves engineered for universal control of compressed air, industrial water and lubricating oil, available in two mature structural configurations: direct-acting 2V025 and diaphragm pilot-operated 2V130 & 2V250 variants. Constructed with robust forged brass valve bodies paired with high-performance sealing elements, this lineup delivers reliable switching performance covering zero-pressure startup and high-flow pipeline regulation. The compact 2V025 direct-acting model adopts a direct electromagnetic drive structure that enables normal opening at 0MPa zero pressure differential. Equipped with wear-resistant VITON fluorine rubber seals, it withstands weak corrosive media and adapts perfectly to low-pressure pipelines, vacuum loops and micro-flow spraying & cooling equipment. The pilot-operated 2V130 and 2V250 rely on medium pressure difference to drive the diaphragm, featuring remarkable large flow capacity and low coil power consumption; they require a minimum startup pressure of 0.05MPa and utilize NBR nitrile rubber seals ideal for conventional water and compressed air pipelines. All versions adopt Class B insulated coils with IP65 ingress protection and a rapid switching response within 0.05 seconds. Multiple wiring options (DIN socket, flying leads, indicator light sockets) and abundant thread specifications ranging from G1/8 up to G1 inch support flexible field installation. Widely deployed in vacuum control, equipment cooling water circuits, boiler automatic water feeding, air compressor water intake and main gas-liquid pipeline cut-off, the SOLH 2V series offers economical, stable general fluid switching solutions for full-spectrum industrial automation fluid circuits.

SOLH 2P series mini 2/2-way direct acting normally closed solenoid valves adopt high-strength PA66 nylon engineering plastic valve bodies, specially designed for low-cost small-flow automatic switching of compressed air, clean water and low-viscosity lubricating oil. Featuring genuine zero-pressure startup performance, the valve can open normally under 0MPa pressure difference, effectively breaking the pressure dependence of pilot-operated solenoid valves. This series adopts a mature direct electromagnetic driving structure. Under power-off status, the built-in reset spring tightly compresses the valve core to maintain a fully closed state; when energized, electromagnetic attraction lifts the valve core rapidly to conduct the pipeline, with the whole switching action finished within 0.05s for ultra-fast response. Standard configuration uses wear-resistant VITON fluororubber seals with outstanding resistance to oil, water and mild corrosive media; NBR nitrile rubber sealing is available as an optional replacement according to working conditions. The coil reaches IP65 dustproof and waterproof protection grade with Class B insulation, capable of stable continuous operation in humid workshop environments. With fixed φ2.5mm flow orifice and CV value of 0.23, two mainstream thread specifications G1/8 and G1/4 are available, paired with diverse wiring options including standard DIN socket, flying leads and indicator light sockets, together with universal AC/DC voltage options to meet global matching demands. Lightweight compact outline suits installation inside compact equipment modules. It is widely used in vacuum generator air source control, small cylinder air supply switching, equipment micro cooling water loops, automatic spraying, air compressor automatic drainage and small humidification systems, serving as a cost-effective miniature fluid control alternative to brass 2V series valves.

SOLH 3V series 3/2-way pneumatic solenoid directional control valves are engineered with both direct-acting and pilot-operated structures, tailor-made for driving single-acting spring return cylinders and switching vacuum pneumatic circuits. Available in Normally Closed (NC) and Normally Open (NO) configurations, this series adopts high-strength lightweight aluminum alloy valve bodies with compact layout, rapid response and IP65 dustproof & waterproof protection grade, acting as the standard core control component for small and medium-sized pneumatic automation systems. The port layout follows universal industry standards: P for main air inlet, A for execution working port connecting cylinders or vacuum suckers, R for exhaust port matched with silencers to lower operational noise. Direct-acting 3V1 and 3V2 variants support reliable zero-pressure startup within 0~0.8 MPa with switching response under 0.05s, perfectly fit for low-pressure gas pipelines and negative-pressure vacuum control scenarios. Pilot-operated 3V100/3V200/3V300 series features larger flow capacity and lower coil power consumption, requiring a minimum inlet pressure of 0.15 MPa for stable switching to satisfy high-flow conventional pneumatic loops. Equipped with a thimble-style manual override button for convenient on-site debugging during installation and maintenance, the whole series supports oil-free operation with stable sealing performance. Multiple thread specifications including M5, G1/8, G1/4 and G3/8 are optional, paired with mainstream global AC & DC voltages and two wiring modes of DIN socket and flying leads. It can directly replace traditional 3A air pilot valves and 3L hand pull valves without structural modification, widely deployed in workpiece clamping jacking mechanisms, vacuum adsorption switching, pneumatic interlock protection and inching control of small actuators.

SOLH 4V series pilot-operated pneumatic directional control valves are mainstream industrial pneumatic components covering 5/2-way two-position and 5/3-way three-position configurations, specially optimized for driving reciprocating movement, mid-stroke positioning and pressure retention of double-acting pneumatic cylinders. Adopting high-precision spool valve core and built-in pilot actuation structure, this series features low friction resistance, sensitive switching action and low coil power consumption, widely deployed in automated assembly lines, packaging machinery, positioning fixtures and general pneumatic transmission systems. The five-port layout complies with universal industry standards: P serves as the main air supply inlet; A and B are two execution ports connected to the front and rear chambers of double-acting cylinders to control extension and retraction; R and S are exhaust ports configured with silencers to lower running noise. The 5/2-way type includes single-coil electric control and double-coil electric control variants. Single-electric-control valves rely on spring reset to return automatically upon power cut, ideal for conventional reciprocating actions and safety reset applications. Double-electric-control valves possess position memory without springs, locking the current cylinder position steadily after power off for long-time positioning and pressure holding. The 5/3-way three-position version provides three optional neutral modes: closed center (Type C) locks all ports for cylinder suspension locking and anti-drop protection; exhaust center (Type E) connects A/B ports to exhaust channels for pressure relief and free floating during manual commissioning; pressure center (Type P) feeds compressed air to both working ports for bidirectional balanced clamping. Available specifications range from 4V110 up to 4V410 with thread sizes M5, G1/8, G1/4, G3/8 and G1/2. Equipped with IP65 dustproof and waterproof coils supporting mainstream AC and DC voltages, the whole series supports oil-free operation and comes with a manual override button for convenient on-site testing and maintenance. It is the universal standard directional valve for mainstream industrial pneumatic automation.

SOLH 5V series 5/2 & 5/3 way pneumatic solenoid valve, fully interchangeable with AirTAC 5V series. 0.9W lowpower coil, 30millioncycle lifespan, ≤0.05s highfrequency response, IP65 rating with clean internal pilot exhaust. Available in single/double electric control and 3position C/E/P middle functions, ideal for doubleacting cylinders, electronics, foodmedical cleangrade automation equipment.

SOLH 7V compact pilot-operated solenoid valve includes complete 5/2 and 5/3 way variants, covering single-coil spring return, double-coil latching and three center functions: center closed, center exhaust, center pressure supply. It adopts integrated internal centralized exhaust runner design with around 30% higher flow capacity than traditional 4V series valves, featuring switching response ≤50ms and maximum operating frequency up to 5 Hz. Ultra-low power coils generate less heat for continuous energization, with DC power consumption 0.7W and AC 1.1VA. A full size lineup from M5 to 3/8" is offered, supporting both standard thread ports and push-in quick fittings. Valves can be installed individually or stacked on multi-station aluminum manifolds to save cabinet space and simplify main air piping. Operating pressure ranges 0.15~0.8 MPa with working temperature -20℃~70℃. Die-cast aluminum valve body delivers long sealing service life, widely used for cylinder directional switching and centralized pneumatic control on all automated production lines.

SOLH SY series pilot-operated 5-port solenoid valve is fully interchangeable with matching SMC valves, including SY3000 mini, SY5000 medium mainstream, SY7000 large and SY9000 extra-large models. It provides complete circuit options: 5/2 single/double coil and 5/3 three-position with center closed, center exhaust & center pressure supply functions. Standard 0.35W coils and optional 0.1W ultra-low power energy-saving coils generate little heat for continuous energization. Internal pilot version works 0.1~0.7 MPa, while external pilot variant supports -100kPa vacuum environment. The gap-sealed spool reaches up to 200 million switching cycles. Air ports are arranged on side, top and bottom for flexible tubing routing. Valves adopt plug-in snap design compatible with SS5Y manifold valve islands, enabling single-valve maintenance without disassembling the whole bank, with IP65 plug connector and IP67 manifold base rating. Optimized internal runners deliver around 80% higher flow than legacy valves, and built-in pilot filter mesh prevents spool stuck by dust. Widely used for cylinder directional switching and centralized pneumatic control in semiconductor, automotive welding, packaging and medical automation equipment.

SOLH 4M series plate-type 5/2-way solenoid valves strictly comply with international NAMUR mounting standards, purpose-built for direct assembly onto pneumatic actuators driving ball valves and butterfly valves. The integrated bottom base comes with pre-embedded P, A, B, R1 and R2 air passages, enabling seamless docking with actuator air cavities without external tubing for A/B working ports. This streamlined layout drastically cuts pipeline layout workload and potential air leakage points compared with conventional tube-connected 4V series solenoid valves. This lineup adopts internal pilot spool construction with oil-free operation, offered in single-coil spring reset (4M×10) and double-coil latching memory (4M×20) configurations covering three size grades: 4M100, mainstream 4M200 and high-flow 4M300. Single electric control variants automatically reset under spring tension once power is disconnected for fail-safe reset scenarios, while double electric control versions retain their switching position steadily after power cut to sustain valve opening/closing status for long-term pipeline locking. Each unit is fitted with a side-mounted manual override button for convenient offline commissioning and maintenance testing. Coils support widely used global AC/DC voltages with IP65 dustproof and waterproof ingress protection, suitable for rigorous working conditions in water treatment, chemical pipelines and general industrial fluid switching. The series is dimensionally compatible with manifold bases shared with the equivalent 4V series, supporting standalone actuator installation or centralized valve island assembly via multi-station manifolds. With certified standard NAMUR interface, interchangeable with mainstream Airtac 4M series, it serves as a dedicated matched control component for automated on-off regulation of pneumatic ball and butterfly valve actuators.