Check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent medium backflow, also known as a check valve, one-way valve, or backflow valve. A check valve is an automatic valve that primarily functions to prevent media backflow, prevent pump and drive motor reversal, and discharge container media. Check valves are mainly divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis). By selecting different structural types and materials, it can be widely used in various media such as water, steam, oil, acids, alkalis, etc.
Item NO.:
XUVAL88-276Lead Time:
50 DaysProduct Orgin:
CHINABrand:
XUVALShipping Port:
ShanghaiPayment:
100%TTMOQ:
1H76W hard sealed wafer butterfly check valve: The sealing surface material of the valve seat is consistent with the valve body material, and precision grinding technology is used to adapt to high-temperature and high-pressure working conditions.
H77J type soft sealing rubber lined butterfly check valve: The valve chamber is lined with skeleton rubber, which improves the corrosion resistance of the valve and can replace all metal valves within the allowable temperature range, reducing engineering costs.
The main components have a wide selection range and a wide range of suitable media. The epoxy resin coating on the inside and outside of the valve has excellent anti-corrosion performance.Suitable for high-rise building water supply and sewage pipelines, pipelines with certain chemical corrosive media, and pipelines with limited installation space.
2、 Adopting standards
Entry Name | Adopting standards |
Design and manufacturing acceptance | JB/T 8937-2010 |
Valve structure length | GB/T 12221-2005、API594 |
Valve flange connection | GB/T 9113-2010 |
Valve sealing test | GB/T 13927-2008、JB/T9092-1999 |
3、 Performance parameters
Product Name | Butterfly type double disc check valve and rubber lined double disc check valve |
Connection Type | Wafer type |
Nominal Diameter | DN40-DN600 |
Nominal Pressure | PN10/PN16/PN25/150LB |
Test Pressure | Shell test: nominal pressure × 1.5x |
Sealing Test | Nominal pressure × 1.1x |
Low pressure test | 0.2MPa |
External spraying | Cast iron, cast steel material, epoxy resin coating, stainless steel body |
Temperature | Hard seal ≤ 350 ℃, soft seal ≤ 120 ℃ |
Applicable Medium | Water, steam, oil, general corrosive fluids, etc |
4、 Optional materials for components
Part Name | Optional materials |
Valve body | Grey cast iron (CI), ductile iron (DI), cast steel (WCB), stainless steel (CF8/CF8M) |
Valve plate | Spheroidal graphite cast iron electroplating (D), CF8 (P), CF8M (R), aluminum bronze (T) |
Valve seat | EPDM, NBR, stainless steel body |
Valve shaft | Stainless steel SS416, stainless steel SS304, stainless steel SS316 |
Spring | Stainless steel SS416, stainless steel SS304, stainless steel SS316 |
Shim | PTFE, stainless steel SS304, stainless steel SS316 |
5、 Outline Dimensional Drawing
mm | in | L | ΦD | 4-Φd | a° | |||
PN10 | PN16 | PN10 | PN16 | PN10 | PN16 | |||
DN50 | 2" | 52 | 125 | 19 | 90 | |||
DN65 | 2.5" | 52 | 145 | 19 | 90 | |||
DN80 | 3" | 52 | 160 | 19 | 90 | 45 | ||
DN100 | 4" | 62 | 180 | 19 | 45 | |||
DN125 | 5" | 65 | 210 | 19 | 45 | |||
DN150 | 6" | 78 | 240 | 23 | 45 | |||
DN200 | 8" | 97 | 295 | 23 | 45 | 30 | ||
DN250 | 10" | 100 | 350 | 355 | 23 | 28 | 30 | |
DN300 | 12" | 129 | 400 | 410 | 23 | 28 | 30 | |
DN350 | 14" | 178 | 460 | 470 | 23 | 28 | 22.5 | |
DN400 | 16" | 159 | 515 | 525 | 28 | 31 | 22.5 | |
DN450 | 18" | 181 | 565 | 585 | 28 | 31 | 18 | |
DN500 | 20" | 213 | 620 | 650 | 28 | 31 |
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