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Haiyan Wellong Machinery Co. Ltd

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Haiyan Wellong Machinery Co. Ltd is located in Economic Development Zone in Haiyan Country, near Shanghai. We specialize in making gas meters, gas meter test benches and watt-hour meter testing devices. Engaged in export business for many years, our products are well received in Asia, Europe, Latin/South America, the Middle East and Africa.

Our three factories cover 13,000 square meters and house 105 to 139 employees. We use three advanced production lines and other facilities like:
  • Assembly workshop: with gas meter production line using advanced tooling equipment
  • Membrane welding: using plastic ultrasonic welding technology to weld membrane and splint, to make sure the membrane is firmly connected with the splint, with reliable sealing
  • Automatic fastening devices: automatically and simultaneously suppress 20 fastenings on the side of the meter-core, overcoming the uneven stress problems of sealing caused by hand pressing
  • One-step molding technology for vertical spindle and rocker arm at a particular angle, reducing discreteness due to manual adjustment
  • Automatic coating devices: using programmable servo controlled duplex stereo automatic coating equipment, to ensure the consistency of product coating, making tightness more reliable
  • Steel shell pneumatic package devices: pneumatically overall sealed, helping the gas meter to improve the ability to resist internal pressure
  • High and low temperature testing chambers: simulate and accurately test the metering accuracy of gas meters in a variety of extreme environments
  • Meter-core error detection equipment
  • Testing meter-core error: to improve the rate of qualified products
  • Automatic detection devices for meter-core tightness: using negative pressure mode to make sure the meter-core is well sealed
  • Automatic detection devices for meter-core pressure loss
  • Automatic detection devices for side cover tightness measuring
  • Measuring rooms
  • Gas meter error detection devices
  • Dry-type machine tightness detection devices
These resources enable us to complete and deliver orders in 20 to 30 days.

We have five to 10 R&D personnel with six years of experience to develop new products to keep your selection updated. We also hired 20 to 29 quality auditors with three years of working experience. They ensure the highest quality all the time by performing strict checks in the whole production process. Because of their hard work, we have obtained ISO 9001:2008:14Q200442ROS certification.

With four years of working experience, our five to nine foreign trade staff are looking forward to serving you. They are proficient in English and Japanese, ensuring excellent communication with you. Orders start at 100 pieces for gas meter and one set for testing bench. Call now to get your order started.
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