Consultation hotline
Social responsibility
Contact Us
Hotline: After-sales installation: 
Product inquiry purchase: After-sales maintenance: 
Address: Social responsibility
Why install a check valve before the water meter?
The purpose of installing a check valve upstream of the water meter is to prevent the meter from spinning backward and ensure the accuracy of water measurement. Below, we’ll explain why installing a check valve is so important.
1. When the pressure rises, the water is compressed, causing the rotor water meter to rotate in the forward direction. However, when the pressure rises again but isn't as high as before, it will no longer cause the water meter to spin on its own.
2. When the pressure drops, the check valve will automatically close, and the water meter will no longer rotate.
The above is the importance of installing check valves. Chengde Longzhida Intelligent Instrument & Meter Technology Co., Ltd. develops water meters that are high-quality, easy to install, and come with comprehensive after-sales service. For many years, the company has consistently adhered to the principle of putting customers first. If you’re interested, please visit our official website for more details. We also welcome your call.
Longzhida Company Successfully Hosted the Victory Parade Commemorating the War of Resistance.
Longzhida Company Successfully Hosted the Victory Parade Commemorating the War of Resistance.
Today is a day that every Chinese person should solemnly remember—the 80th anniversary of the victory of the Chinese People’s War of Resistance Against Japanese Aggression and the World Anti-Fascist War.
On July 2, Chengde Longzhida Company held a meeting with the Sino-German Institute. After thorough discussions between the two sides, Mr. Bai, General Manager of Longzhida Company, and the faculty team from the Sino-German Institute reached a consensus: Longzhida Company officially entrusted the Sino-German Institute to carry out the design and R&D work for a new type of ultrasonic water meter.
On May 30, Longzhida Company successfully held an exceptionally meaningful event titled “Welcoming the Eighth ‘National Science and Technology Workers’ Day’: Promoting the Spirit of Scientists.”
Contact Us
Add：No.3, longzhida Road, electronic industrial park, high tech Industrial Development Zone, Chengde City, Hebei Province
Hotline: +86-15930084101
After-sales installation: +86-314-7018122
Product inquiry purchase: +86-314-2078138
After-sales maintenance: +86-314-7018122
E-mail: 310540860@qq.com
Website: www.cdlong.com
Enter mobile website