DBB Plug Valve

Short Description:

DBB Plug Valve PRODUCT RANGE: Sizes: NPS 2 to NPS 42 Pressure Range: Class 150 to Class 600 Flange Connection: RF, FF, RTJ MATERIALS: Casting: (A216 WCB, A351 CF3, CF8, CF3M, CF8M, A995 4A, 5A, A352 LCB, LCC, LC2) Monel, Inconel, Hastelloy,UB6 STANDARD Design & manufacture API 6D, API 599 Face-to-face ASME B16.10 End Connection ASME B16.5, ASME B16.47, MSS SP-44 (NPS 22 Only) Test & inspection API 6D, API 598 Fire safe design API 6FA Also available per NACE MR-0175, NACE ...


Product Detail

Materials

Product Tags

DBB Plug Valve

PRODUCT RANGE:

Sizes: NPS 2 to NPS 42

Pressure Range: Class 150 to Class 600

Flange Connection: RF, FF, RTJ

MATERIALS:

Casting: (A216 WCB, A351 CF3, CF8, CF3M, CF8M, A995 4A, 5A, A352 LCB, LCC, LC2) Monel, Inconel, Hastelloy,UB6

STANDARD

Design & manufacture API 6D, API 599
Face-to-face ASME B16.10
End Connection ASME B16.5, ASME B16.47, MSS SP-44 (NPS 22 Only)
Test & inspection API 6D, API 598
Fire safe design API 6FA
Also available per NACE MR-0175, NACE MR-0103
Other PMI, UT, RT, PT, MT
Fugitive emissions Complies to ISO 15848-1

 

Design Features:

1.Body structure

The valve body of our DBB Plug Valve includes valve body, valve core, valve disc (embedded in main sealing ring), end cover, chassis, packing and other main components. The valve core and disc are the core of the valve body part. The      valve core is fixed in the valve body with the upper and lower trunnions, the flow channel opening is in the middle, and the two sides are wedge-shaped surfaces. The wedge face mill has dovetail guide rails that are attached to two discs on both sides. The disc is the main sealing element and has a cylindrical surface. Accuracy of Class B hard seal can be achieved. The cylindrical surface is milled with a groove circle, and the main sealing ring is permanently embedded with fluorine rubber or nitrile rubber, etc. by molding and vulcanization, which plays the role of hard sealing and soft sealing when the valve is closed.

2.Manipulator structure

The manipulator is mainly composed of signs, hand wheel, spindle bushings, ball pins, brackets and other components, which are fixed on the end cover and connected with the spool rod by connecting pins. The manipulator part is the actuator of the action. Close the valve from the open position, turn the hand wheel clockwise, the valve core rotates 90° first, and drives the valve disc to rotate to the valve body flow channel position. Then the valve core moves down in a straight line, driving the valve disc to expand radially and approach the inner wall of the valve until the soft seal is pressed into the groove, so that the surface of the valve disc is in contact with the inner wall of the valve.

3. Close the process.

    Open the valve from the closed position, turn the handwheel counterclockwise, the valve core first moves straight up, and then rotates 90° after reaching a certain position, so that the valve is in a conducting state.

 4. DBB or DIB Function

 The DBB Plug Valve (double block and bleed plug valve) also named GENERAL VALVE, Twin Seal plug valve. this constant wear by using two seating slips mounted independently on a tapered plug by dovetails, which mechanically retract from the seating surface prior to rotating. This provides a bubble-tight verifiable dual seal without seal abrasion.

If you need more information about DBB Plug valve or DIB Plug valve, please contact our market department.  Tel.: 0086-577-67915979, Email: sales@nswvalve.com


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  • Newsway Valves Materials

    NSW valve body and trim material can be offered in Forged type and Casting type. Next to stainless and carbon steel material, we also manufacture valves in special materials such as titanium, nickel alloys, HASTELLOY®*, INCOLOY®, MONEL®, Alloy 20, super-duplex, corrosion resistant alloys and urea grade materials.

    Available materials

    Tradename UNS nr. Werkstoff nr. Forging Casting
    Carbon steel K30504 1.0402 A105 A216 WCB
    Carbon steel   1.046 A105N  
    Low Temp Carbon steel K03011 1.0508 A350 LF2 A352 LCB
    High Yield steel K03014   A694 F60  
    3 1/2 Nickel steel K32025 1.5639 A350 LF3 A352 LC3
    5 Chrome, 1/2 Moly K41545 1.7362 A182 F5 A217 C5
    1 1/4 Chrome, 1/2 Moly K11572 1.7733 A182 F11 A217 WC6
      K11597 1.7335    
    2 1/4 Chrome, 1/2 Moly K21590 1.738 A182 F22 A217 WC9
    9 Chrome, 1 Moly K90941 1.7386 A182 F9 A217 CW6
    X 12 Chrome, 091 Moly K91560 1.4903 A182 F91 A217 C12
    13 Chrome S41000   A182 F6A A351 CA15
    17-4PH S17400 1.4542 A564 630  
    254 SMo S31254 1.4547 A182 F44 A351 CK3MCuN
    304 S30400 1.4301 A182 F304 A351 CF8
    304L S30403 1.4306 A182 F304L A351 CF3
    310S S31008 1.4845 A182 F310S A351 CK20
    316 S31600 1.4401 A182 F316 A351 CF8M
      S31600 1.4436    
    316L S31603 1.4404 A182 F316L A351 CF3M
    316Ti S31635 1.4571 A182 F316Ti  
    317L S31703 1.4438 A182 F317L A351CG8M
    321 S32100 1.4541 A182 F321  
    321H S32109 1.4878 A182 F321H  
    347 S34700 1.455 A182 F347 A351 CF8C
    347H S34709 1.4961 A182 F347H  
    410 S41000 1.4006 A182 F410  
    904L N08904 1.4539 A182 F904L  
    Carpenter 20 N08020 2.466 B462 N08020 A351 CN7M
    Duplex 4462 S31803 1.4462 A182 F51 A890 Gr 4A
    SAF 2507 S32750 1.4469 A182 F53 A890 Gr 6A
    Zeron 100 S32760 1.4501 A182 F55 A351 GR CD3MWCuN
    Ferralium® 255 S32550 1.4507 A182 F61  
    Nicrofer 5923 hMo N06059 2.4605 B462 N06059  
    Nickel 200 N02200 2.4066 B564 N02200  
    Nickel 201 N02201 2.4068 B564 N02201  
    Monel® 400 N04400 2.436 B564 N04400 A494 M35-1
    Monel® K500 N05500 2.4375 B865 N05500  
    Incoloy® 800 N08800 1.4876 B564 N08800  
    Incoloy® 800H N08810 1.4958 B564 N08810  
    Incoloy® 800HT N08811 1.4959 B564 N08811  
    Incoloy® 825 N08825 2.4858 B564 N08825  
    Inconel® 600 N06600 2.4816 B564 N06600 A494 CY40
    Inconel® 625 N06625 2.4856 B564 N06625 A494 CW 6MC
    Hastelloy® B2 N10665 2.4617 B564 N10665 A494 N 12MV
    Hastelloy® B3 N10675 2.46 B564 N10675  
    Hastelloy® C22 N06022 2.4602 B574 N06022 A494 CX2MW
    Hastelloy® C276 N10276 2.4819 B564 N10276  
    Hastelloy® C4 N06455 2.461 B574 N06455  
    Titanium GR. 1 R50250 3.7025 B381 F1 B367 C1
    Titanium GR. 2 R50400 3.7035 B381 F2 B367 C2
    Titanium GR. 3 R50550 3.7055 B381 F3 B367 C3
    Titanium GR. 5 R56400 3.7165 B381 F5 B367 C5
    Titanium GR. 7 R52400 3.7235 B381 F7 B367 C7
    Titanium GR. 12 R53400 3.7225 B381 F12 B367 C12
    Zirconium® 702 R60702   B493 R60702  
    Zirconium® 705 R60705   B493 R60705  

     

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