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Home > Industrial Valve > Plug valves > Eccentric Plug Valve
What is Eccentric Plug Valve ?
The most unique feature of eccentric valve is that its seat deviates from the valve shaft, providing eccentricity. Because it is a quarter-turn valve, it is easy to automate process flow or pressure control. When the valve is opened counterclockwise about the shaft, the plug will be lifted from the seat during rotation. Lifting action helps prevent wear and tear in gravel wastewater services.
Advantages of eccentric plug valve
  • 01
    The valve body is an integrated, top-mounted design with a simple structure, convenient online maintenance, no valve body leakage points, and supports higher pipeline system strength.
  • 02
    The surface of the plug is treated by nitriding, nickel-phosphorus alloy plating or spraying hard alloy to improve the surface hardness.
  • 03
    The surface hardness of supersonic sprayed hard alloy can reach HRC65 or above, and the surface hardness can reach HRC58~60 after nickel-phosphorus alloy plating and heat treatment.
  • 04
    There is a balance hole at the bottom of the plug, which can introduce the medium pressure into the bottom of the plug, so that the plug presses the valve body to play a sealing role.
  • 05
    Because of the lubrication of grease, the valve operating torque is small and the operation is labor-saving.
  • 06
    The valve stem and the plug adopt a slip ring connection method, which can reduce the concentricity error between the valve stem center and the plug cone surface, and improve the force condition and operating performance of the valve stem.
Design Standard
  • API
  • ASME
  • ANSI
  • EN
  • DIN
  • GOST
  • GB
  • JIS
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The characteristics of eccentric plug valve

The plug has an elastomeric coating that seals against a nickel-welded seat in the valve body. The valve shaft is usually integrally cast as part of the valve plug and rotates in stainless steel bearings in the bottom of the valve body and bonnet.

The valve's sealing function is aided by "direct pressure" which pushes the valve plug tightly into the seat. The valve will also seal with pressure in the "reverse pressure" direction, but requires turning the valve plug clockwise past the center of the seat.

The greater the closing rotation, the tighter the seal due to the eccentric effect. In service, if the valve wears, the valve can be closed further to restore the seal.

The most common designs have a cylindrical plug face and a cylindrical seat. The cylindrical seat provides a relatively wide sealing surface. Alternatively, the port and plug face can be rounded, similar to a hemispherical valve.


Technical Parameters
SizeDN15-DN1500, 1/2''-60''
PressurePN10-PN420, Class150-Class2500
Temperature-200°C to 650°C
Connection TypeFlange, Thread, Socket weld, Butt weld
Operation ModeManual, Pneumatic, Electric, Hydraulic, Gear operation


Materials
Valve BodyForgedA105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, etc
CastWCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc
Valve StemF6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500, N08020, Inconel625, Incoloy825, etc
Valve DiscA105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, F6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500，Incoloy825，WCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc
Seat SealingSS, BR, CU, AS, CS, AL, PTFE, NBR, FKM, AI203, etc


Design Standards
Valve BodyAPI 6D, API 608, ASME B16.34, DIN 3357, BS 5351, GOST 9833, JIS B2071, GB/T 12237, etc.
FlangeANSI B16.5, EN 1092-1, JIS B2220, GB/T 9113, ASME B16.47, GOST 12821, DIN 2543-2545, etc.
ConnectionANSI B16.10, ASME B16.25, JIS B2212, GOST 33259, DIN 3202, etc.
Test StandardsAPI 598, ISO 5208, BS EN 12266, ASME B16.104, GOST 9544-2015, JIS B2003, DIN 3230, etc.


Why Choose our eccentric plug valves
2000+
2000+ Choose Our Products
Our Company Has Launched A One-stop Service
  • 01
    Determine the use environment
    Determine the working conditions of the valve, such as the nature of the medium, the ambient temperature, the flow rate and other factors that affect the valve selection
  • 02
    Select valve type and material
    After determining the working condition, we begin to choose the right valve type. Our engineers will choose the most suitable valve type according to the actual situation to maximize the performance of the valve
  • 03
    Expert verification
    After the valve type and materials are selected, the final production drawing is finalized after repeated inferences and verification by experts
  • 04
    Production
    We use information visualization production, each step of valve production can understand the progress in real time through the online system, each production step has a special inspection and audit
  • 05
    Quality Violence
    After the production of our products, they will go through 15 tests (pressure test, PT, UT, size test, etc.), and finally go through the joint inspection and confirmation of multiple departments before finally leaving the warehouse and entering the packaging link
  • 06
    Super long after-sales
    The valves produced by our company have a 2-year long warranty, providing our customers with lifelong free technical support services
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