China ZH-D body ported vacuum ejector Manufacturer, Supplier, Factory

SOLH 4H series hand lever directional control valves are developed in accordance with mainstream industrial standards, covering 5/2-position and 5/3-position configurations. Operated purely by manual lever manipulation without electromagnetic coils or pneumatic pilot signals, these spool-type manual valves are widely adopted for on-site equipment commissioning, emergency safety shutdown and inching control of double-acting cylinders. Constructed with high-strength aluminum alloy housings and precision spool assemblies, two positioning structures are optional: automatic spring return and steel ball mechanical locking. Crucially, the mounting dimensions are fully consistent with 4V solenoid valves and 4A air-operated valves, enabling direct interchange and flexible switching among electric, pneumatic and manual control modes in standard pneumatic systems. The five-port layout complies with international general specifications: P serves as the main compressed air supply inlet; Ports A and B connect to two cavities of double-acting cylinders to govern extension and retraction movements; R and S are exhaust ports compatible with standard silencers to lower exhaust noise. For 5/2-position models, spring-reset variants automatically rebound once the lever is released to deliver foolproof protection against unintended continuous actions; self-locking versions secure the spool position via steel ball positioning and stay latched until manual switching, ideal for long-duration fixed working states. All 5/3-position units adopt dual stable ball positioning with three configurable neutral modes. Closed Center (Type C) seals all ports to lock cylinders and prevent falling of vertically mounted actuators; Exhaust Center (Type C) vents A/B ports for pressure relief, allowing free cylinder floating during manual testing; Pressure Center (Type P) supplies compressed air to both working ports for synchronous clamping and force balance regulation. Running on filtered compressed air within 0.15~0.8 MPa under lubrication-free conditions, the valves work steadily at -20℃ to +70℃. Available specifications range from 4H200 to 4H400 with multiple thread options. Devoid of electrical components, the valves feature spark-free inherent explosion resistance, well-suited for flammable, dusty and high-risk production sites. They support panel mounting and base installation, frequently applied for production line manual commissioning, emergency pneumatic circuit cut-off, safety interlock loops and retrofitting replacement of automatic control valves.

Switchgear copper bolts are critical components in electrical switchgear assemblies, designed for high conductivity and mechanical strength. Made from high-purity copper, these bolts ensure excellent electrical performance and durability. The bolts feature a robust construction with precise threading to ensure secure connections and optimal contact with other components. They are commonly plated to enhance resistance to corrosion and wear, ensuring longevity in various operational environments. Switchgear copper bolts are available in various sizes and configurations to meet specific design requirements and are subjected to rigorous quality control to guarantee reliability and performance.

SOLH AR series pilot operated pressure regulators include complete models of AR425/625/635/825/835/925/935. Adopting internal pilot relief structure, they feature high flow rate and ultra-high pressure regulation precision with hysteresis ≤0.02MPa and repeatability ≤0.01MPa. Equipped with dual pressure ranges and built-in automatic overpressure relief function, they support lubrication-free operation and arbitrary installation. Suitable for large-bore main air pipelines, high-flow equipment and precision pneumatic control systems, they are ideal stabilization solutions for factory centralized air supply systems.

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.

The Switchgear Drawer Operation Handle is a crucial component designed for the smooth operation and secure handling of switchgear drawers. Constructed from high-strength materials, typically stainless steel or durable plastics, this handle ensures robustness and longevity in demanding environments. It features an ergonomic design that provides a comfortable grip, allowing for easy manipulation of heavy or bulky drawers.

FKN12-12D/630-20 indoor AC high-voltage load switch is a three-phase high-voltage switchgear with a rated voltage of 12KV and a rated frequency of 50HZ. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, off combined short-circuit current. The load switch equipped with the grounding switch can withstand short-circuit current.and m-ainly used in power distribution substation and industrial electrical equipment where three phase closed loop circuit or bottom power supply system for control and protection.