Despite the sweltering heat, duct machines are being shipped out at a rapid pace.

Customer satisfaction is our highest priority. May your business prosper and God bless you!

LOCK(duct machine,spiral machine and damper machines manufacturer) will join the exhibition from May 5-7th 2026 in Melbourne!

ARBS is the largest and most influential HVAC trade  show in the Southern Hemisphere！ LOCK will join the exhibition from May 5-7th 2026 in Melbourne! Address: 1 Convention Centre PI, South Wharf VIC 3006, Australia Time: 2026.5.5-2026.5.7 (10:00-18:00) Booth Number: P143 LOCK is professional in HAVC industry, if u have any ideas, we can provide you with a complete duct solution.

Welcome friends from the USA to visit our factory.

LOCK Duct Machinery Welcome to join the Canton Fair in Guangzhou 15-19th

Welcome to join the Canton Fair in Guangzhou 15-19th April   LOCK is professional HVAC duct and Fire damper machine manufacturer in China.   We provide free shuttle service within the scope of Guangzhou!  （40-minute drive from the exhibition.）   Come and see our machine quality, waiting for your visit!   Factory Address:No. 9 Punan Road, Lishui Town, Foshan, Guangdong Province

Welcome Singaporean friends to visit our factory