NINGBO ZONGDA ELECTRIC APPLIANCE SPRING Co., Ltd. Established in 1993 with over 10 years history, Ningbo Zongda Electrical Appliance Spring Co Ltd has passed the ISO9001: 2000 International Quality Management System Certification. At present, the company occupies 5000 m2 and have over 200 staff including 16 technical personnel. Introducing advanced Japanese equipments, the company is specialized in producing all classes of springs for air hose reels, cleaners, timers, meters and toys, spiral springs for safety belts, home appliances, constant force springs and all kinds of elastic components; And supplies high elastic and heat treatment carbon steel springs.

With strong technical force, the company has precise shearing machine, hardening & tempering production line, which can control the temperature below 2C, precise auto charging machine, micro-control shaping machine, Vickers & Rockwell hardness tester and full-auto moment measurer for guaranteeing quality and development. We supply high elastic and heat treatment carbon steel springs as well.

The electrothermal department is specialized in producing electrothermal tube, electrothermal copper tube, Aluminum tube, steel tube and copper plated tube, which are widely used for Sandwich ovens, electronic ovens and some other cooking electrical appliances. For over 10 years, we has kept improving our management system; Absorbing the advantage from other products at home and aboard, and developing new products. Out products are widely sold at domastic and aboard and received good reputation from customers. Our company has continuously commented as "Rate AAA Credit Enterprise". We would like to think about our customers' requirements and join hands with them together to create a brilliant future!

Main Products: All classes of springs for air hose reels, cleaners, timers, meters and toys, spiral springs for safety belts, home appliances, whirl springs and constant force springs with the raw material of domestic 1Cr17Ni7, imported SUS301 stainless steel and thickness ranges from 0.10 to 1.50.

Stainless steel carbon and steel dome, contact and non-contact elastic components. Stainless steel band and carbon quenching band Metal electrothermal tube: Electrothermal copper tube, Aluminum tube, steel tube, copper plated tube and stainless steel tube and so on, which are widely used in all sizes of irons, Sandwich ovens, electronic ovens and other electrothermal appliances. Washing machines, drain retractors of air conditioner and drain valves and so on.