Micro-resistance slow-closing noise-reducing check valve,slow-closing noise-reducing check valve, check valve

Structural features of DHH44X micro-resistance slow-closing silencing check valve

1. The structural length is short, being only 1/4 to 1/8 of that of traditional flanged check valves

2. Small in size and light in weight, its weight is only 1/4 to 1/20 of that of the traditional micro-resistance slow-closing check valve

3. The valve disc closes quickly and the water hammer pressure is small

4. It can be used on both horizontal and vertical pipes and is easy to install

5. The flow channel is unobstructed and the fluid resistance is low

6. It is sensitive in action and has good sealing performance

7. The valve disc has a short travel and a small impact force when closing the valve

8. The overall structure is simple, compact and aesthetically pleasing

9. Long service life and high reliability

Standards and Specifications

Design and Manufacture: API594, API6D, JB/T8937

2. Structural length: API594, API6D, DIN3202, JB/T8937

3. Pressure-temperature grades: SNSIB16.34, DIN2401, GB/T9124, HG20604, HG20625, SH3406, JB/T74

4. Testing and Inspection: API598, JB/T9092

5. Pipe flange: JB/T74~90, GB/T9112! 9124, HG20592-20635, SH3406, ANSIB16.5, DIN 2543-2548, GB/T13402, API605, ASMEB16.47

The DHH44X/H-10/16 type micro-resistance slow-closing silencing check valve is mainly used at the outlets of industrial and urban water supply and drainage pipelines, high-rise residential buildings, high-end hotels, and pressurized water transfer pumps. In the design, the requirements of the usage environment have been fully considered. The inclined plate structure is adopted to achieve no vibration, no noise, smooth operation, ensuring a quiet environment in hotels and residences, and also having an energy-saving effect. By delaying the shutdown, the local backflow water is discharged into the system, which greatly reduces the water pressure impact of the backflow when the pump stops and eliminates the generation of destructive water hammer peaks. The interception seal adopts butadiene rubber, which has the characteristics of good sealing performance, shock absorption and wear resistance, long service life and convenient maintenance.

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.