Explore our core engineering range, optimized for high precision, immediate switchover reliability, and strict compliance with European machinery regulations.
Switzerland’s industrial sector is renowned globally for its uncompromising standards in precision, chemical manufacturing, pharmaceuticals, and critical infrastructure management. In key regions such as Basel's chemical clusters, the alpine hydropower systems, and the municipal water supply networks of Zurich and Geneva, process automation demands absolute safety protocols.
Declutchable gearboxes serve as the ultimate failsafe mechanical link. Stationed between the pneumatic actuator and the quarter-turn valve (such as ball valves or butterfly valves), these override systems allow manual mechanical control over critical lines if pneumatic air supplies fail or electrical power drops out. For Swiss operations, manual overrides must conform to European standards like EN ISO 12100 for safety of machinery and PED 97/23/EC for pressure equipment.
Stard-gears provides high-integrity declutchable operators built with integrated interlocking mechanisms. This ensures zero risk of automated actuator energy conflicting with manual operation, preventing structural tool breakages and minimizing hazardous exposure risks for plant operators.
Request Technical ConsultationFounded in 1999 and strategically located in the modern Suzhou Industrial Park, Stard-gears is a premier manufacturer specializing in advanced valve control technology. Our plant spans over 8,900 m², complemented by a 2,500 m² corporate design office. Over the decades, our operations have scaled to generate annual sales of $7,000,000, achieving consistent growth of 10% to 20% year-on-year.
We operate in compliance with the ISO9001 quality management system. The Yangtze River Delta region’s mature metallurgical and manufacturing supply chains afford us rapid access to top-grade steel castings, precision gear machining centers, and raw materials. This operational advantage translates directly into aggressive delivery schedules and excellent quality controls for our Swiss and European partners.
Stard-gears delivers application-specific products to municipal water installations, natural gas pipelines, nuclear generation plants, and complex chemical processes.
Send Inquiry Now| Manufacturing Center | Suzhou Industrial Park, China |
| Established Year | 1999 |
| Facility Footprint | 8,900 m² Plant / 2,500 m² Offices |
| Quality System | ISO9001 Certified Quality Program |
| Production Peak | 100,000 sets per year capacity |
| Core Markets | Switzerland, Germany, USA, Italy, Singapore |
Using structural simulations and finite element analyses (FEA), we prove our designs prior to casting, reducing prototype cycle times and maximizing on-site operating safety.
We establish operational boundaries: torque requirements, ISO 5211 mounting layouts, environmental ratings, and safety interlocking specs.
Engineers conduct 3D kinematic testing and stress calculations to verify housing limits under critical peak loadings.
Detailed CAD modeling guides casting patterns and CNC machinery parameters for tight dimensional controls.
Efficient lead times are backed by an integrated ERP system at Stard-gears. From raw iron receipt to CNC drilling, pressure testing, and final assembly, every single component is monitored and tracked. This digital control optimizes resource scheduling, eliminates shipping delays, and maintains traceabilitity.
Equipped with multi-axis CNC tooling machines and automated testing frames, our Suzhou facility produces gear configurations to high tolerances, ensuring minimal mechanical play and low input torque forces.
Annual Maximum Output Value
ERP System Managed Production
Quality assurance at Stard-gears is a continuous process. Every casting undergoes structural integrity reviews, including chemical composition analyses and surface crack checks. Final units undergo full load torque verification and lifecycle simulation runs.
To meet high Swiss safety parameters, our testing equipment logs performance output curves. We verify that declutching forces remain within safe ergonomic limits under full system load, ensuring operators can easily engage the override in emergency situations.
Our quality lab is equipped to run comprehensive testing protocols, verifying physical, dimensional, and operational parameters for every batch.
We supply 3.1 EN 10204 steel material & torque certifications upon request.
Request SpecsCompare casing materials, maximum torque capacities, and typical Swiss application fits to match your design requirements.
| Series Type | Housing Materials | Max Torque Output | Environmental Rating | Ideal Application Environment |
|---|---|---|---|---|
| SLJ / WCB Series | Cast Steel (ASTM A216 WCB) | Up to 65,000 Nm | IP67 / IP68 Submersible | High Pressure Steam & Alpine Hydropower Lines |
| OEM Ductile Iron | Ductile Iron (GGG40 / GGG50) | Up to 32,000 Nm | IP67 Weatherproof | Standard Chemical Plants & Gas Transmission |
| Aluminium Alloy Series | Anodized Aluminium Alloy | Up to 4,500 Nm | IP65 Dust-Tight | Cleanrooms, Pharmaceutical Processing & HVAC |
| SB Bevel Series | Cast Carbon Steel | Up to 120,000 Nm | IP68 Explosion Proof options | Heavy Mining Slurries & Main Water Intakes |
Find technical answers on sizing, system safety, mechanical engagement, and international shipping options to Switzerland.
Our declutchable gearboxes incorporate an eccentric mechanical shift lever. When engaged, the worm gear meshes with the output drive sleeve, allowing manual operation while venting the air in the pneumatic actuator cylinders. When automated pneumatic control is required, the lever is pulled back, locking the worm gear out of mesh, returning full control to the pneumatic actuator. Optional limit switches monitor this position, transmitting current status to control systems to prevent actuation while the manual clutch is engaged.
Yes. We design and machine drive sleeves to fit ISO 5211 interfaces. Our design office can customize center squares, keyways, or double-D connections, ensuring compatibility with valves from suppliers worldwide.
Our declutchable gearboxes carry full CE markings and comply with European safety directives. We supply material test reports matching EN 10204 3.1 standards, hydrostatic testing logs, and standard product dimension files to ensure trouble-free customs clearance and import compliance.
Leveraging our location near global shipping terminals in Shanghai and Ningbo, we offer flexible shipping options, including sea freight and express air transport, directly to hubs in Zürich, Basel, and Geneva under CIF, FOB, or DDP terms.
Select from our complete range of certified manual gear operators, Scotch yoke actuator accessories, and specialty materials.
