China pneumatic exhaust noise reduction valve 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.

Richge specializes in the development and production of high-quality Fixed Pin for Switchgear Drawer Door. We are committed to providing reliable solutions for customers worldwide. Our fixed pins ensure secure and stable operation of drawer doors in switchgear systems. Made from premium materials and precisely engineered, our products offer exceptional durability and stability. Whether for industrial or commercial applications, our fixed pins meet stringent requirements and deliver outstanding performance. With a customer-first approach, we offer personalized service to ensure every client finds the ideal solution. Choose us for superior quality and reliability.

Richge specializes in manufacturing and supplying Switchgear Drawer Handles designed for durability and ease of use. We provide high-quality handles that ensure secure operation and long-lasting performance in various switchgear systems. With a focus on precision engineering and innovative design, our handles are crafted to meet the specific needs of industrial and commercial applications. Our commitment to quality and customer satisfaction drives us to deliver products that enhance the reliability and efficiency of electrical systems worldwide. Trust us to provide the essential components that contribute to the safety and functionality of your switchgear equipment.

At Richge, we specialize in innovative switchgear components, including our advanced Extended Rotary Handle for Switchgeare. Designed for durability and ease of use, our handle ensures smooth operation and reliable performance in demanding environments. Crafted from high-quality materials, it offers enhanced ergonomics and extended reach, making it ideal for various switchgear applications. With a focus on precision engineering and customer satisfaction, our extended rotary handle meets stringent industry standards, providing an effective solution for controlling switchgear systems. Trust Richge for cutting-edge components that enhance operational efficiency and safety in your electrical infrastructure.

Product Introduction: Switchgear Primary Plug-In Live Door Arm The Switchgear Primary Plug-In Live Door Arm is a crucial component in the functionality of electrical switchgear systems, designed to ensure safe, reliable, and efficient operation. This component plays an essential role in maintaining secure connections between the live parts of the switchgear and the primary busbar.

Richge specializes in the design and manufacturing of electrical switchgear mechanisms, providing high-quality and reliable solutions to customers worldwide. Our product range includes various switchgear mechanisms such as operating mechanisms, interlocking devices, and safety locks, widely used in power systems and industrial facilities. With advanced technology and extensive industry experience, we ensure that each product meets international standards and caters to specific customer needs. Our goal is to become a leading supplier of electrical switchgear mechanisms through continuous innovation and exceptional customer service.