Clamp check valve, also known as counter-flow valve, check valve, back pressure valve, check valve. This kind of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, which belongs to an automatic valve.
Check valve for piping systems, its main role is to prevent media backflow, to prevent the pump and its drive motor reversal, as well as the container media release. Check valves are also used on lines where the pressure may rise to a level above the pressure of the main system auxiliary system. Check valve according to the different materials, can be applied to a variety of media on the pipeline. Check valve installed in the pipeline, that is to become the complete pipeline of the fluid components, the valve opening and closing process will be affected by the transient state of the system it is affected; in turn, the valve closing characteristics Occurrence of fluid flow on the state of action.
Clamp check valve for nominal pressure PN1.0MPa ~ 42.0MPa, Class150 ~ 2500; Nominal diameter DN12 ~ 1200mm, NPS1 / 2 ~ 48; Operating temperature -196 ~ 540 ℃ on the various pipelines, to prevent Media backwards. Through the selection of different materials, can be applied to water, steam, oil, nitric acid, acetic acid, strong oxidizing media and urea and other media.
Standards and norms
1, Design and manufacture: API 594, API 6D, JB / T 8937;
2, the length of the structure: API 594, API 6D, DIN 3202, JB / T 8937;
3, pressure - temperature class: ANSI B 16.34, DIN 2401, GB / T 9124, HG 20605, SH 3406, JB / T 74;
4, test and test: API 598, JB / T 9092;
Pipe flange: JB / T 74 ~ 90, GB / T 9112 ~ 9124, HG 20592 ~ 20635, SH 3406, ANSI B 16.5, DIN 2543 ~ 2548, GB / T 13402, API 605, ASME B 16.47.
Structural features
1, the structure of the short length, the length of the structure only traditional flange check valve 1/4 ~ 1/8;
2, small size, light weight, the weight of only traditional flange check valve 1/4 ~ 1/20;
3, and the valve closed quickly, water hammer pressure is small;
4, horizontal pipe or vertical pipe can be used, installation;
5, smooth flow path, fluid resistance is small;
6, action sensitive, good sealing performance;
7, valve stroke is short, off valve impact is small;
8, the overall structure, simple and compact, handsome in appearance;
9, long service life, high reliability
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