For the H44 type flange connection used by domestic conventional swing check valve and H41 typeflanged lift check valve, the two flange type check valve has a bulky volume, fluid resistance, highwater hammer pressure valve closed, installation, repair is difficult, short life shortcomings. The supply valve net for the traditional flange structure check valve problems, development of H76wafer double disc swing check valve and H71 valve wafer type check valve products wafe lift stopproduction, has a short length of the structure, small volume, light weight, the valve closed fast the water hammer pressure, small, convenient installation, small fluid resistance, flexible action, good sealing performance, the valve stroke is short, close the valve impact force is small, the overall structure, simple and compact structure, high reliability, long life characteristics.

The scope of application:

Wafer check valve is suitable for the nominal pressure of PN10 ~ PN420, Class150 ~ Class2500;the nominal diameter of DN15 ~ DN1200, NPS1/2 ~ 48; all kinds of pipeline working temperature of -196 to 540 DEG C, used to prevent the media back. By choosing different materials, applicable to the petrochemical, metallurgical, power, light industry, food and other industries of water, steam, oil,nitric acid, acetic acid, strong oxidizing medium and urea and other media.

Structure characteristics:

1 a short length of the structure, the structure of the length of only the traditional flange of the check valve 1/4 ~ 1/8;

2 has the advantages of small volume, light weight, the weight is only the traditional flange of the check valve 1/4 ~ 1/20;

3 the valve closing fast, the water hammer pressure small;

4 horizontal pipe or a vertical pipe can be used, easy to install;

Fluid resistance small, 5 flow passage;

6 flexible action, good sealing performance;

7 the valve stroke is short, close the valve small impact force;

8 the overall structure is simple and compact, modelling beautiful;

9, long service life, high reliability.

Standard Specification for:

Design and manufacturing standards: JB/T 8937

The length of the structure of standard: GB/T 12221-2005

The connecting flange standard: GB/T 9113

The pressure - temperature rating: GB/T 12224-2005

Test standard: GB/T 13927-2008