Products

SOLH VNB201 external air pilot operated 2-way fluid valve is driven by 0.25–0.7MPa pilot air to realize zero differential pressure startup, performing stable switching under vacuum, low pressure and zero pressure difference. Adopting balanced poppet structure, it features low flow resistance, high flow capacity and bidirectional fluid passage for flexible pipeline layout. Valve bodies are available in brass, stainless steel and aluminum alloy, matched with NBR/FKM/EPR seals to suit compressed air, water, oil, vacuum, inert gas and mild acid/alkaline fluids. Without built-in electric parts, it generates no electric sparks and fits explosion-prone environments. Mountable at any angle with port sizes ranging from 3/8" to 1", it is widely applied in cooling water, lubricant oil, vacuum handling, chemical, food, pharmaceutical and flammable fluid pipeline on-off control.

SOLH VNA201 is a self-developed standardized 2/2-way external pilot fluid control valve with balanced poppet structure. Driven by 0.2~0.7MPa pilot air, it achieves zero differential pressure startup and bidirectional fluid flow, delivering stable switching under low pressure, vacuum and fluctuating air supply. Optimized internal passages bring large flow capacity and low pressure loss. Equipped with wear-resistant seals and solid valve body verified by million-cycle durability tests, it operates lubrication-free and maintenance-free with anti-fouling performance. Compact lightweight body allows all-angle mounting with 3/8" and 1/2" port sizes, supporting air pilot and solenoid pilot control. Compatible with compressed air, inert gas, light oil and neutral air-liquid mixed fluids, it is widely used for cylinder buffering, cooling lubrication, high-speed exhaust and pipeline on-off of machine tools, packaging & cleaning automation equipment.

SOLH VR51 all-pneumatic two-hand safety interlock valve complies with EN ISO 13851 and EN574 safety standards. It integrates built-in 0.5-second synchronous detection anti-cheat logic; output air only activates when two buttons are pressed within 0.5s time difference, and air supply cuts off instantly once any button is released to avoid hand crushing injuries. Fully pneumatic without electrical components, it delivers intrinsic explosion-proof performance for dusty, humid and flammable workshops. The 3/2-way logic valve comes with standard exhaust silencer and wear-resistant lubrication-free spool for long service life. Equipped with φ6 / 1/4" flame retardant push-in fittings and optional mounting bracket, supporting rear or bottom piping layouts, it serves as standard safety interlock component for punching, riveting, cutting, injection molding and other high-risk processing machinery.

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.

SOLH IP200 force-balance nozzle-flapper all-pneumatic servo positioner converts 0.02~0.1MPa air control signal into precise cylinder linear displacement without power supply, delivering intrinsic explosion safety for chemical, mining and flammable environments. It achieves high control precision with sensitivity ≤0.5% FS, suitable for double-acting cylinders with bore ≥Ø50mm and stroke 25~300mm. Integrated all-in-one design mounts directly on cylinders, equipped with separate zero and span adjustment screws for tool-free on-site calibration. Carbon steel or stainless steel feedback springs are optional, alongside low and high temperature customized variants. The supply air must be dry and filtered within 5μm. Widely applied in precision press-fitting, coating, web tension & edge correction, valve stroke regulation and fully pneumatic servo positioning explosion-proof equipment.

SOLH IL100 booster relay is fully interchangeable with equivalent SMC models, acting as a 1:1 equal-pressure precision pneumatic volume amplifier. It achieves precise pressure tracking between input signal and output with linearity error within ±1% FS and maximum flow up to 6000 L/min, effectively eliminating slow response lag from long pipelines, large diaphragm actuators and big bore cylinders. Multiple thread standards including Rc, NPT and G are available. Besides standard temperature version, low-temperature (-30℃), high-temperature (100℃) and copper-free high-purity variants for semiconductors are optional. The anti-corrosion aluminum alloy body supports direct mounting or bracket installation with low steady air consumption. Widely matched with positioners for process control valves, long-distance instrument air lines, heavy lifting/clamping cylinders and high-precision positioning loops; copper-free version fits semiconductor high-purity inert gas systems.