China Switchgear rail extension Manufacturer, Supplier, Factory

Richge is a manufacturer of High Voltage Switchgear Door Hinges in China, specializing in precision-engineered components designed to provide reliable and robust support for switchgear doors. Our high-voltage switchgear door hinges are crafted to ensure smooth operation, durability, and safety in demanding electrical environments.

SOLH 3L series 3/2-way hand pull directional control valves follow standard industry specifications with a default Normally Closed (NC) structure equipped with automatic spring return. Operated via straightforward axial push-pull handle movement, this manual pneumatic valve requires no electric parts or pneumatic drive signals, making it an intrinsically safe manual switching component for pneumatic circuits. It is widely deployed for single-acting cylinder actuation, circuit on-off switching, inching commissioning and safety interlock systems, especially ideal for field debugging, emergency cut-off and explosion-prone working environments. The three-port layout complies with universal industry standards: P for main compressed air inlet, A for working output port connecting single-acting cylinders, and R for exhaust port compatible with standard silencers to reduce exhaust noise. Under normal released status, the built-in return spring presses the precision spool to seal the P inlet; port A links to R for pressure relief to maintain the closed safe state. Manual pulling of the handle shifts the spool to connect P and A ports for air supply to drive cylinder movement. Once released, the spring instantly resets the valve, cutting air intake and exhausting residual pressure to prevent unintended continuous operation. Constructed with robust aluminum alloy housings and low-friction precision spools, the valve supports lubrication-free operation with stable sealing performance. Four size grades ranging from compact 3L100 up to heavy-duty 3L400 cover thread specifications M5, G1/8, G1/4, G3/8 and G1/2; PT, NPT and G thread options are available to satisfy global installation demands. The valve supports panel mounting and base mounting, sharing identical installation dimensions with the 3A air-operated valves for seamless interchange between manual and pneumatic control modes. Without any electrical components, it delivers spark-free operation suitable for flammable, dusty and humid workshops, commonly used for manual clamping, ejection cylinder control, equipment maintenance safety lockout and combined manual-pneumatic logic control systems paired with 3A pilot valves.

Small bus end cover for switchgear Product Background: Richge is a manufacturer of Small Bus End Covers for switchgear in China, specializing in precision-engineered components that provide essential protection and finishing for busbar connections within switchgear systems. Our bus end covers are designed to enhance the safety, performance, and reliability of electrical installations.

SOLH 2W series 2/2-way normally closed fluid solenoid valve with solid brass body includes small orifice direct-acting 030/050 models and large bore pilot-operated 150~500 variants, designed for automatic on-off control of clean water, compressed air, cutting coolant, lubricating oil and weakly corrosive fluid pipelines. The direct-acting version realizes zero differential pressure startup with no minimum working pressure limit, features compact size, universal mounting orientation and millisecond high-frequency switching, ideal for low-pressure micro-flow branches, vacuum auxiliary water circuits and single-point cooling for small machine tools. The pilot-operated type requires a minimum 0.05MPa startup differential pressure, delivers ultra-large flow with low-power low-temperature-rise coils, suited for air compressor main drain lines, general assembly main spray water circuits and high-flow circulating pipelines for water treatment systems. Standard NBR nitrile rubber seals are equipped, with optional heat & acid resistant EPDM food-grade seals. Multiple international thread standards (PT/G/NPT) and full-range coil voltages (DC12/24V, AC24/110/220V) are available, supported by DIN plug sockets for cabinet wiring and IP65 waterproof wire leads for humid outdoor equipment. Heat-resistant coils allow 24-hour continuous energization without burnout. Selection guidelines: choose direct-acting type for pipelines with static pressure below 0.05MPa and micro single-point flow; select pilot-operated variant for G1/2 and above main headers with stable high-pressure large circulation. EPDM seal is mandatory for hot water, purified water and food-grade fluid media.

SOLH VO307 manifold-mount 3-port direct acting poppet solenoid valve is tailor-made for valve islands and matched with VV307 series manifold bases. Without side pipe ports, it allows dense side-by-side arrangement to cut leakage points and save space. It supports zero-pressure startup, stable operation under 0–0.7MPa positive pressure and full vacuum down to -101.2kPa. Multiple modes including NC, NO, flow divider and selector can be switched by replacing cover plates. Adopting lubrication-free HNBR elastic seals, it achieves ≤20ms response time and 10Hz max frequency with standard manual override and low-power coils. Equipped with imported core parts for high cost performance, it is widely applied in robotic arms, vacuum suction, air blowing, packaging, printing and modular centralized pneumatic control systems.

Richge specializes in the development and production of high-quality Switchgear Drawer Moving Parts, focusing on delivering reliable solutions for the global power industry. Our products are known for their exceptional mechanical performance and durability, ensuring stable operation of equipment under high loads and in complex environments. With advanced manufacturing processes and stringent quality control, our switchgear drawer moving parts are widely used in various power distribution systems, helping customers enhance operational safety and system reliability.