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    What is an Eccentric Plug Control Valve?

    The eccentric rotary plug control valve has a one-piece body and a single shaft valve design and connects by flanged(ASME Class150 ~ 300, PN10 ~64) or wafer type(ASME Class150 ~ 300).

    An eccentric plug valve is a type of rotary control valve which has a shaped plug that offsets in relation to the centerline of the plug and seat ring. The plug doesn’t touch with the valve seat until within a few angles of the close position. Due to the plug-shaped contacts or ”cams” into the seat, its surfaces will dynamically align to get to shut off. This is the valve we called eccentric plug valves.

    This valve with a plug-shaped component that follows an eccentric part as it rotates.

    The plug will not touch the seat until it turns within a few degrees of the cutoff position. Sometimes we call the plug a cam, when it is into the seat, the sealing surfaces dynamically align to achieve cutoff.

    The most common application for eccentric rotary plug control valves is for the medium with slurries, grit, or solids. They have high performance of control accuracy and wide rangeability with all the inherent benefits of rotary control valves.

    Basically, the eccentric rotary control valves will be complete with a pneumatic actuator, digital/smart positioner, and air filter regulator for precise flow control.

    Main Technical Parameters

    • Size: DN25 to DN100
    • Pressure Rating: 150LB to 300LB, PN16 to pN64
    • Initial Deviation: ±3%
    • Dead Zone: 1%
    • Rated travel deviation:50°±3°
    • Inherently adjustable ratio: 100:1
    • Leakage level:
      Metal Seat: ANSI VI;
      Soft Seat: ANSI VI;
    • Pressure recovery coefficient FL:
      Full Bore: Flow to Open: 0.85; Flow to Close: 0.68;
      Reducing Bore: Flow to Open: 0.88; Flow to Close: 0.70

    Name

    Material

    Body

    A216 Gr. WCB(ZG25), A216 Cr. WCC,  CF8(ZG1Cr18Ni9Ti), CF8M(ZG0Cr18Ni12Mo2Ti), A352LC3   A352LC3

    Trim

    CF8(ZG1Cr18Ni9Ti), CF8M(ZG0Cr18Ni12Mo2Ti), CF8M+No.6

    Seat

    304、316、316+No.6、(316+PTFE)

    Stem

    316(0Cr18Ni12Mo2Ti), 17-4PH

    Cage

    9Cr18, 316+No.6

    Packing

    PTFERPTFEGraphite

    Characteristic Flow Curve of Plug Control Valves

    characteristic flow curve of plug control valves

    DN (mm)

    Cv

    Air to Close Flow to Open

    Air to Open Flow to Close

    Air to Open-Flow to Close Air to Close-Flow to Open

    Supply Air

    0.14

    0.18

    0.21

    0.25

    0.28

    0.32

    25

    14

    8.4

    5.6

    2.8

    7.03

    10.1

    10.1

    10.1

    7.03

    10.1

    10.1

    10.1

    7.03

    10.1

    10.1

    10.1

    – – – –

    – – – –

    – – – –

    – – – –

    – – – –

    40

    30

    18

    12

    6

    3.45

    5.20

    7.03

    7.03

    4.71

    7.03

    9.84

    9.84

    3.02

    4.50

    6.33

    6.33

    5.62

    9.67

    10.1

    10.1

    – – – –

    – – – –

    – – – –

    – – – –

    50

    50

    30

    20

    10

    1.90

    2.88

    3.80

    3.80

    2.53

    3.94

    5.20

    5.20

    1.62

    2.46

    3.30

    3.30

    3.51

    5.34

    7.03

    7.03

    4.22

    7.03

    7.03

    7.03

    – – – –

    – – – –

    – – – –

    80

    135

    81

    54

    1.40

    2.25

    3.23

    1.97

    2.95

    4.50

    1.27

    1.90

    2.81

    2.67

    4.08

    6.12

    4.22

    6.54

    7.03

    – – –

    – – –

    – – –

    100

    230

    138

    92

    0.70

    1.12

    1.62

    0.98

    1.55

    2.18

    0.63

    0.98

    1.40

    1.40

    2.10

    3.02

    2.25

    3.45

    4.92

    3.10

    4.71

    6.82

    3.94

    6.05

    7.03

    4.22

    7.03

    7.03

    What is the difference between an eccentric ball control valve and an eccentric plug control valve?

    The Eccentric ball valve (EBV) adopts a unique eccentric structure, with compact design, good cutting performance, long service life, and other characteristics, both with adjustment and cutting two functions. Widely used in the chemical industry, power plant, textile, food, medicine, papermaking, and other industrial sectors and municipal engineering, water plants and other pipelines to water, sewage, oil liquid or air, gas, natural gas, steam, and other media to cut off or adjust the flow control.

    soft seat eccentric ball valve flange type
    soft seat eccentric ball valve flange type

    1. Bottom shaft seal gasket 2. O-ring 3. Bottom Shaft 4. Bottom Guided 5. Seat Sealing 6. Seat Component
    7. Plug 8. Shaft Sleeve 9. Top Guided 10. Valve Body 11. Packing Gasket 12. Packing 13. Packing Gland
    14. O-ring 15. O-ring 16. Valve Stem 17. Retainer Ring 18. Split Ring

    An eccentric plug valve is a type of rotary control valve which has a shaped plug. The plug doesn’t touch with the valve seat until within a few angles of the close position. Due to the plug-shaped contacts or ”cams” into the seat, its surfaces will dynamically align to get to shut off. This is the valve we called eccentric plug valves.

    eccentric plug control valves1
    eccentric plug rotary valves

    EBV series eccentric ball control valve is like Fisher CV500 Eccentric Plug Valve is V-notched ball control valve, and we talk about eccentric plug rotary control valve usually means Fisher V500 series. 

    What are eccentric plug control valves used for?

    The pneumatic eccentric rotary valve is mainly used for highly corrosive fluids, dirty or viscous particulate media, coking, and other difficult-to-handle applications.

    The valve body material can be selected from WCC steel, CF8M, CF3M, duplex stainless steel, austenitic stainless steel, titanium Alloy steel, or other alloys. The pneumatic eccentric rotary valve produced by THINKTANK has long service life, wide adjustment, and control range, strong cutting ability, and good wear resistance for particles and severe working conditions.

    Applicable to most fluid media, including water, steam, air, process gas, etc. Especially suitable for desalination plants, paper mills, oil refineries, coal chemical industry, textile mills, power plants, etc.

    upstream industry of control valves
    upstream industry of eccentric rotary control valves
    Industry Application

    Eccentric Plug Control Valve Manufacuturer
    Free Download Drawing

    THINKTANK is one of the well-known control valve manufacturers in China, which focus on control systems for over 10 years. If you are interested in the price of eccentric plug control valves, just feel free to contact us. <[email protected]>

    eccentric plug rotary control valves drawing
    eccentric plug rotary control valves drawing

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