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Check Valve

Wafer lined rubber butterfly check valve

Wafer lined rubber butterfly check valve

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.:

    XUVAL88-276
  • Lead Time:

    50 Days
  • Product Orgin:

    CHINA
  • Brand:

    XUVAL
  • Shipping Port:

    Shanghai
  • Payment:

    100%TT
  • MOQ:

    1
Products Details
1、 Product Features
H77X type soft seal wafer butterfly check valve: The valve seat adopts multiple narrow band designs, and the valve seat is directly vulcanized onto the valve body, greatly improving sealing performance, achieving complete sealing and zero leakage.

H76W 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.
Short structural length, good rigidity, and convenient installation.

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
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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    If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.