TOBO STEEL GROUP CHINA
TOBO STEEL GROUP CHINA
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Body SS304 Wafer Check Valve 2'' PN10 Seat EPDM High Safety And Reliability
Product introduction
The wafer flange clamped butterfly check valve is a energy-save product.It is manufactured based the foreign advanced technology and in accordance with relative international standards.This product is featured by excellent retaining per-formance,high safety and reliability and low flow resistance.It is suitable for systems in the industries of petrochemical food processing,medicine,textile,paper-making.Water,supply,drainage,metallurgy,energy,and light industry,etc,used as a check valve in one way.
Quick Details
| Product Name | CHECK VALVE |
| Material | stainless steel |
| Color | nickel white |
| Standard | DIN GB JIS ANSI |
| Class | 150LB(16)~600LB(2500) |
| Body and Ball Material | CF8 CF3 CF8M CF3M WCB PVC UPVC PP |
| Thread | -29~150(PTFE), -29~200( PTFE+GLASS), -29~300(J2 PPL) |
| Steam Seat and Gasket | PTFE |
Technical Specifications
>P.T Ratings to ASME B16.34
>Face to Face Dimensions to ASME B16.10
>Flanged Ends to ASME B16.5
>Butt-weld Ends to ASME B16.25
>Valves Marking to MSS SP-25
>Inspect & Tested to API 598
>Size Ranges from 1/2″ thru 60″.
>Structured in One Piece Union Body
>Pressure Ratings from Class 150 to Class 2500, PN16 to PN420
>Ends Connections in Flanged R.F or RTJ, Wafer, Fully Lugged and Grooved
>A variety of body and trim material is offered, including carbon steel ASTM A216 WCB, WCC; Cast or Ductile iron A126, GG25, A536 or GGG50, Low Carbon Steel LCB, LCC, Alloy Steel WC6, WC9, C5, Stainless Steel CF8, CF8M, CF3, CF3M, Duplex & Super Duplex Steel A890 GR. 4A,5Aor F51, Special Materials in Monel, Alu. Bronze C95800, 95600 etc. Coatings may be provided for added corrosion or wear resistance. Hard-facing and weld overlays may also be supplied. Seats Options with metal-to-metal or bubble-tight resilient. Optional Bypass system & Counter-weight Assembly.
Stainless Steel Check Valve Application:
Valve is used for preventing the back-going of medium in pipelines and equipments, and the pressure of medium will bring the result of opening and closing automatically.
When the medium is back-going, valve disc will automaticaly closed to avoid accidents.
Stainless Steel Check Valve Test Pressure
| Test Item | Shell Test | Seal Test | Back Seal Test | Air Seal Test | |||||
| Medium | Water | Air | |||||||
| Unit | MPa | lbf/in2 | MPa | lbf/in2 | MPa | lbf/in2 | MPa | lbf/in2 | |
| Pressure (Class) | 150 | 3.1 | 450 | 2.2 | 315 | 2.2 | 315 | 0.5-0.7 | 60-100 |
| 300 | 7.8 | 1125 | 5.6 | 815 | 5.6 | 815 | |||
| 400 | 10.3 | 1500 | 7.6 | 1100 | 7.6 | 1100 | |||
| 600 | 15.3 | 2225 | 11.2 | 1630 | 11.2 | 1630 | |||
| 900 | 23.1 | 3350 | 16.8 | 2440 | 16.8 | 2440 | |||
| 1500 | 38.4 | 5575 | 28.1 | 4080 | 28.1 | 4080 | |||
Types of Valves
The type of disk will decide the type of valve. Most common types of Check valves are
Swing Type.
Top Hinged
Tilting disk
Lift Type
Piston Type
Ball type
Dual Plate Type
Stop Check Valve
Swing Check Valve
The disc in a swing type valve is unguided as it fully opens or closes. This Valve operates when there is flow in the line and get fully closed when there is no flow. Turbulence and pressure drop in the valve is very low.
Disk and seat designs can be of metal to metal or metal to composite.
The angle between the seat and the vertical plane is known as the seating angle and varies from 0 to 45 degrees.
Usually, the seat angles are in the range of 5 to 7 degrees. Larger seat angles reduce the disc travel, resulting in quick closing, thus minimizing the possibility of water hammer. A vertical seat has a 0-degree angle.
The swing type valve allows full, unobstructed flow and automatically closes as pressure decreases. Usually installed in combination with gate valves because they provide relatively free flow combinations.
A basic swing type valve consists of a valve body, a bonnet, and a disk that is connected to a hinge.
Parts of Non-Return Valve
It is consists of body, cover, disk, hinge pin, and seat ring. In the image below you can see the parts of the valve.
Valve main parts and material
| No Parts Name | Materials | ||||||||
| Body | 304 | LCB | LCC | WC6 | WC9 | CF8 | CF8M | CF3 | CF3M |
| Stem | 304 | LCB | LCC | WC6 | WC9 | CF8 | CF8M | CF3 | CF3M |
| Spring | 304 | LCB | LCC | WC6 | WC9 | CF8 |
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| Gasket | 150~600LB, STAINLESS STEEL WINDING GASKET | ||||||||
| Bolt | B7 | L7M | L7M | B16 | B16 | B8 | B8 | B8 | B8 |
| Nut | 2H | 7M | 7M | 4 | 4 | 8 | 8 | 8 | 8 |
| Standard |
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| Design&Manufacture | API 594 | API6D | JB/TB937 |
| Face to face | API594 | DIN3202 | JB/T8937 |
| Pressre-Temperature | ASME B16.34 | DIN2401 | GB/T9124 |
| Pipe Flange | JB/71-90 | JB/T9112-9124 |
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| PN Mpa | SIZE(mm) | L | D | D3 | D2 |
| 1.6Mpa | 40 | 60 | 96 | 46 | 41 |
| 50 | 60 | 109 | 56 | 51 | |
| 65 | 67 | 129 | 73 | 65 | |
| 80 | 73 | 144 | 88 | 80 | |
| 100 | 73 | 164 | 108 | 102 | |
| 125 | 86 | 194 | 132 | 127 | |
| 150 | 98 | 220 | 160 | 152 | |
| 200 | 127 | 275 | 210 | 203 | |
| 250 | 146 | 332 | 266 | 254 | |
| 300 | 181 | 387 | 310 | 305 | |
| 350 | 184 | 447 | 355 | 350 | |
| 400 | 191 | 498 | 405 | 400 | |
| 450 | 203 | 558 | 455 | 450 | |
| 500 | 219 | 618 | 505 | 500 | |
| 600 | 222 | 732 | 605 | 600 | |
| 700 | 305 | 802 | 700 | 695 | |
| 800 | 305 | 912 | 800 | 796 | |
| 900 | 368 | 1012 | 903 | 898 | |
| 1000 | 432 | 1124 | 1055 | 1050 | |
| 1200 | 524 | 1340 | 1200 | 1400 |