Control Valve

SOLH VT317 direct acting 3-port poppet solenoid valve adopts elastic sealing structure with zero-pressure startup, working stably under 0–0.9MPa positive pressure and full vacuum down to -101.2kPa. Six switchable functions are integrated into one compact valve with high flow capacity, featuring ≤30ms response time and maximum 10Hz switching frequency. Lubrication-free elastic seals ensure reliable tightness and low maintenance cost. Equipped with standard non-locking manual override, it supports single piping or manifold valve island mounting with Rc1/4 port thread and dust-proof housing. It is widely applied in robotic arms, vacuum suction, air blowing, packaging, printing, woodworking and food automation equipment for general pneumatic on-off control.

SOLH VT325 direct acting 3-port poppet solenoid valve adopts full elastic sealing and supports zero-pressure startup, operating stably under 0–1.0MPa positive pressure and full vacuum down to -101.2kPa. Six switchable circuit functions are integrated in one valve for wide versatility. Optimized internal flow channel delivers ultra-high flow capacity with C=6.1 dm³/(s·bar) and response time ≤30ms, ideal for high-flow rapid pneumatic switching. It features lubrication-free elastic seals and standard non-locking manual override, supporting single piping or dense manifold stacking for valve islands with Rc1/4 & Rc3/8 ports. Widely used in robotic arms, vacuum adsorption, air blowing, packaging, textile and woodworking automation equipment.

SOLH VS3135 is a 3-port direct acting solenoid valve with full metal sealing, supporting zero-pressure startup and stable operation within 0–1.0MPa for vacuum, low and high pressure circuits. The wear-resistant metal seal with integrated dust-proof construction realizes lubrication-free long service life. Reinforced internal structure delivers outstanding shock and vibration resistance without misoperation even under unstable differential air supply. Optional manual override and multiple wiring types are available for fast high-frequency switching. It is widely used in robotic arms, vacuum suction, air jet cleaning, packaging, textile and woodworking machinery, an ultra-reliable pneumatic switch for long maintenance-free industrial automation applications.

SOLH VQ21A is a pilot-operated 2-port solenoid valve exclusively customized for dry clean oil-free compressed air circuits. Optimized structure and seals guarantee stable low-pressure startup even under fluctuating air supply. Compact and lightweight with pre-installed φ6/φ8 one-touch push-in fittings for fast field assembly, it achieves ultra-fast response within ≤7ms to sustain long-term high-frequency purging and jetting. Lubrication-free elastic seal and IP65 dust & drip-proof housing resist oil contamination and vibration. Optional tool-locked manual override is available, supporting single standalone or manifold stacking mounting. Widely applied in dry air pipelines, workpiece dust removal, cooling and exhaust control for electronics, packaging and food automation equipment.

SOLH 50 series flameproof pilot solenoid valves cover two models: 50-VFE 5/2 spool valve and 50-VPE 3/2 poppet valve. Certified Ex d Ⅱ BT4, CCC, TIIS & IEC with IPX6 protection, they apply to Zone 1 & Zone 2 flammable and explosive environments such as lithium coating, chemical, painting and oil & gas workshops. Both share interchangeable 3.5W low-power flameproof coils and housings, while their manifold bases are non-interchangeable. 50-VFE requires 0.15MPa differential pressure and only works for positive-pressure double-acting cylinder circuits, incompatible with vacuum. 50-VPE features zero-pressure startup, stable under full vacuum down to -101.2kPa and automatic pressure relief upon power loss for vacuum handling and single-acting cylinders. Lubrication-free design allows single threaded mounting or multi-station manifold valve island assembly with certified flameproof wiring fittings, providing safe standard pneumatic switching for explosion-proof industrial production lines.

SOLH VX23 direct acting 2/2 way solenoid valve realizes zero-pressure startup and stable switching within 0–1.0MPa, compatible with compressed air, tap water, oil, warm water and medium vacuum to cut inventory & model selection costs. Compact and lightweight with 20% higher flow capacity than standard counterparts, it adopts built-in buffer design for low noise and anti-sticking performance under long high-cycle operation. Valve body materials include aluminum alloy, C37 brass and SUS stainless steel with optional NBR/FKM seals. IP65 dust & splash-proof housing with Class B/H coils supports standalone piping or manifold stacking mounting. It is widely used in air blowing, cooling, lubrication, water treatment, vacuum handling and small fluid control for electronics, packaging and food machinery.

SOLH XSA normally closed solenoid valve is specially designed for ultra-high vacuum circuits for air and inert gas, supporting ultimate vacuum down to 1×10⁻⁶ Pa with ultra-low internal and external leakage rates. Its built-in internal spring minimizes friction and particle generation to meet strict cleanroom standards. Featuring lower coil power consumption and lighter body for easy compact integration, it provides multiple connection options including face seal, ferrule and internal Rc/NPT thread, with complete mainstream voltages and wiring terminals. Certified CE & RoHS, it serves as reliable core switching component for semiconductor, PV, LCD, medical sterilization, food vacuum packaging and laboratory ultra-high vacuum testing equipment.

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.