Eccentric rotary plug valve

Body: WCB, SS316,SS316L
Ends: Flange, wafer
Seat: 17-4PH Stainless Steel ASTM A564Gr630
Size: 1/2″ – 12″ (15mm – 300mm)
End connections:
ASME B16.34 class 150-600

    Category: Control valve


    The Eccentric Rotary Valve, also known as the rotary plug valve. This innovative valve features an integral body and bonnet design for streamlined and efficient flow control. With a non-concentric rotation center, seat abrasion is minimized, extending the valve’s service life. In addition to precise control capabilities, this eccentric plug valve excels at shearing medium for optimal performance. Experience enhanced efficiency and longevity with the eccentric rotary control valve.

    rotary plug valve


    • Trim features: eccentric structure
    • Body type: straight—through type
    • Bonnet type: standard integral type
    • Flow characteristic: approximately equal percentag
    • Shut-off class: ASME B16.104 V
    • Pipe connection type: wafer type, flange type
    • Applicable temperature range: -196℃ – 180℃
    • Actuator type: pneumatic piston actuator electric actuator
    • Size range: DN1″ -12″
    • Pressure rating:150 – 60OLB PN1.0 – 6.4Mpa


    Chemical fiber, electric power, metallurgy. Pharmacy, environmental protection

    Eccentric rotary valve eccentric plug valve manufacturers

    1 Stem 17-4PH Stainless Steel ASTM A564 Gr630
    Optional: 316ss,inconel718/625,Monel
    2 Packing PTFE V-ring
    Optional: Graphite-high density/low density
    3 Front bearing 316SS Backed Ptfe,hastelloy C Backed Ptfe
    4 Body Carbon Steel A216 Gr WCB Or A105
    Optional: ASTM A351 CF8M Or A182 F316
    5 Gland Optional: 316ss,inconel718/625,Monel
    6 Plug Carbon Steel A216 Gr WCB Or A105+Surfacing SS
    Optional: 316ss,ASTM A351CF8M Or A182 F316 Monel,Alloy20,Aluminum Bronze, Hastelloy C
    7 Seat 17-4PH Stainless Steel ASTM A564Gr630
    Optional: 316ss,inconel718/625,Monel
    8 Limit part 17-4PH Stainless Steel ASTM A564Gr630

    rotary plug valve

    Size Wafer L Flange L H1 H2 H3 G
    DN25 102 127 126 155 40 G1/4
    DN40 114 165 132 155 45
    DN50 124 178 136 155 49
    DN80 165 203 192 190 70
    DN100 194 229 195 199 108
    DN150 229 267 283 255 150
    DN200 243 292 311 296 180
    DN250 297 330 372 358 220 G1/2
    DN300 338 356 392 394 260


    What is an eccentric rotary plug valve?

    An eccentric rotary plug valve is a specialized type of rotary control valve designed for high-performance flow regulation in various demanding industrial applications. This valve features an eccentrically mounted plug, which rotates off-center from the valve body to achieve a tight shut-off and precise control over fluid flow. The eccentric motion reduces wear and tear on the sealing surfaces, enhancing durability and extending the valve’s service life even under severe operating conditions.

    eccentric plug valve manufacturers

    What is the application of eccentric plug valve?

    One of the key applications of eccentric plug valves is in industries where granular or abrasive media needs to be controlled. These include chemical processing plants, power generation facilities, mining operations, wastewater treatment plants, and many more. The unique design of rotary plug valve allows for precise control over flow rate without damaging or clogging the valve.

    The key feature that sets eccentric plug valves apart from other types of valves is the offset disc shape found inside the valve body. This off-center placement creates an eccentric action during rotation which results in a self-cleaning effect on the seating surface. This means that even with continuous use in harsh conditions, these valves can maintain their tight shut-off capability without any leakage.

    eccentric rotary plug control valve Eccentric rotary plug valve

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

    The primary difference between eccentric plug valves and ball valves lies in their design, operation, and specific applications within various industries. Eccentric plug valves feature an eccentrically mounted plug that rotates off-center to control fluid flow. This design minimizes contact between the plug and the seat during operation, reducing wear and extending the valve’s lifespan. They are particularly suited for handling abrasive, corrosive, and viscous fluids, making them ideal for demanding environments such as chemical processing, oil and gas, and wastewater treatment.

    In contrast, ball valves utilize a spherical ball with a hole through its center, which rotates to open or close the valve. Known for their straightforward operation and reliable sealing capabilities, ball valves are highly effective in providing tight shut-off and are widely used in applications where quick on-off control is essential. They are commonly employed in water distribution, gas supply, and general fluid transfer systems due to their ease of operation and minimal pressure drop.