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English  |
ST-ZH0004
SHSUOTE
848190
1.Description.
Silent check valves are fitted with a flow guide on the body.When the liquid enters from the inlet, push the disc to the outlet.When liquid stop into the export pipeline in the liquid flow rate will gradually slow down, due to the disc in the spring and disc right back in medium with quickly move to the left, before export medium flow rate to zero, to prevent the liquid flow back, so as to prevent water hammer occurs, achieve quiet closed effect, prolong the service life of the valve.
2.Main parts&material
| No. | Part | Material | China stardard |
| 1 | Body | Ductile Iron | DIN 1693/BS EN1563 |
| 2 | Disc | DI+EPDM | ISO 4633 |
| 3 | Spring | \SS3O4 | EN 10088-1/ASTMA959 |
| Ductile iron | O Ring | NBR | |
| 5 | Stem | X5CrNi18-10/304 | EN 10088-1/ASTM A959 |
| Rubber | Washer | X20Cr13/420 | EN 10088-1/ASTM A959 |
| 7 | Nut | X5CrNi18-10/304 | EN 10088-1/ASTM A959 |
| 8 | Bushing | Brass | EN 10088 |
| g | Diffuser | Ductile Iron | DIN 1693/BS EN1563 |
| 10 | Set Screw | A2 | EN 10088-1/ASTM A959 |
3.Features
01. the water flow channel inside the mute check valve body is straight and tends to streamline, which can improve the flow of the pipeline medium.
02. the disc opening and closing movement distance is short, can quickly open and close, the water hammer sound is small, the mute effect is excellent.
03. Ingenious design of valve body, reasonable structure, light weight, easy installation and good airtight performance.
4.Execution standard
| Design standard | BS5153 | |
| Flange connection standard | EN1092-2,ASME B16.1/16.42,AS4087 | |
| Structural length standard | EN558-1 | |
| Inspection testing standard | GB/T 13927,EN12266 | |
5.Technical parameters
| Nominal diameter | DN50-DN300 | |
| Nominal pressure | PN10/16,CL125/150 | |
| Operating temperature | 0°C~80°C | |
| Seal test | 1.25PN | |
| Shell test | 1.5PN | |
| Suitable medium | Water | |
6.Operating principle
When there is no medium flowing in the pipe, the disc of the silent check valve is closed by the action of a spring.
When the pipeline medium is flowing in the correct direction, the disc of the silent check valve is pushed by the fluid, and the disc is opened to allow the fluid to pass through.When the medium in the pipeline occurs counter-current, counter-current medium produces reverse thrust and the force of disc spring. Since the disc can only be opened in one direction, the two thrust forces will press the disc tightly on the sealing surface and prevent the media from flowing back.
1.Description.
Silent check valves are fitted with a flow guide on the body.When the liquid enters from the inlet, push the disc to the outlet.When liquid stop into the export pipeline in the liquid flow rate will gradually slow down, due to the disc in the spring and disc right back in medium with quickly move to the left, before export medium flow rate to zero, to prevent the liquid flow back, so as to prevent water hammer occurs, achieve quiet closed effect, prolong the service life of the valve.
2.Main parts&material
| No. | Part | Material | China stardard |
| 1 | Body | Ductile Iron | DIN 1693/BS EN1563 |
| 2 | Disc | DI+EPDM | ISO 4633 |
| 3 | Spring | \SS3O4 | EN 10088-1/ASTMA959 |
| Ductile iron | O Ring | NBR | |
| 5 | Stem | X5CrNi18-10/304 | EN 10088-1/ASTM A959 |
| Rubber | Washer | X20Cr13/420 | EN 10088-1/ASTM A959 |
| 7 | Nut | X5CrNi18-10/304 | EN 10088-1/ASTM A959 |
| 8 | Bushing | Brass | EN 10088 |
| g | Diffuser | Ductile Iron | DIN 1693/BS EN1563 |
| 10 | Set Screw | A2 | EN 10088-1/ASTM A959 |
3.Features
01. the water flow channel inside the mute check valve body is straight and tends to streamline, which can improve the flow of the pipeline medium.
02. the disc opening and closing movement distance is short, can quickly open and close, the water hammer sound is small, the mute effect is excellent.
03. Ingenious design of valve body, reasonable structure, light weight, easy installation and good airtight performance.
4.Execution standard
| Design standard | BS5153 | |
| Flange connection standard | EN1092-2,ASME B16.1/16.42,AS4087 | |
| Structural length standard | EN558-1 | |
| Inspection testing standard | GB/T 13927,EN12266 | |
5.Technical parameters
| Nominal diameter | DN50-DN300 | |
| Nominal pressure | PN10/16,CL125/150 | |
| Operating temperature | 0°C~80°C | |
| Seal test | 1.25PN | |
| Shell test | 1.5PN | |
| Suitable medium | Water | |
6.Operating principle
When there is no medium flowing in the pipe, the disc of the silent check valve is closed by the action of a spring.
When the pipeline medium is flowing in the correct direction, the disc of the silent check valve is pushed by the fluid, and the disc is opened to allow the fluid to pass through.When the medium in the pipeline occurs counter-current, counter-current medium produces reverse thrust and the force of disc spring. Since the disc can only be opened in one direction, the two thrust forces will press the disc tightly on the sealing surface and prevent the media from flowing back.
