CE Certification High - Pressure Eccentric Plug Valve for Oil and Gas Supplier, Manufacturer
Product Description
Product Usage and Features
The valve is extensively used in major industrial sectors including petroleum, chemical engineering, electric power, and metallurgy. Designed around an eccentric wedge tightening principle, the unit accomplishes tight gate closing, precise adjustment, and secure shut-off through a high-performance transmission mechanism. Both the sealing ring and the ball crown are precision metal rings engineered for high-durability hard surface contact seals.
The ball retracts fully into the valve cavity upon opening to create a large flow section. This completely shields the valve core from direct fluid erosion, minimizing flow resistance and scour wear.
During closing, the spherical surface of the core traverses progressively along the valve seat. This produces a robust shearing action that removes scaling buildup, ensuring dependable sealing even when handling scaling-prone media.
The metal ball crown connects firmly to the eccentric half-sphere, allowing different wear-resistant, anti-corrosive, or high-temperature surfacing alloys on both crown and seat to meet extreme industrial conditions.
Built-in compensation allows the valve to maintain tight sealing over time by slightly adjusting closing rotation. System depressurization permits top-entry online maintenance: lift out internal components without removing the valve from the pipe.
Product Performance Specification
| Nominal Pressure | Shell Test Pressure | Seal Test Pressure | Applicable Media | Applicable Temperature |
|---|---|---|---|---|
| 1.0 / 1.6 / 2.5 / 4.0 / 6.4 / 10.0 / 16.0 MPa | PN × 1.5 times | PN × 1.1 times | Natural gas, steam, oil, acid, alkali, coal powder, coal ash, waste residue, mud, granular, fiber, and other media |
Soft seal: -40°C ~ 200°C Hard seal: -29°C ~ 600°C |
Main Component Materials
| Component Name | Available Materials | |||
|---|---|---|---|---|
| Valve body | WCB | ZG1Cr18Ni9Ti | ZG0Cr18Ni12Mo2Ti | ZG15Cr1Mo1V |
| Back cover | Q235A | 1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti | 25Cr2Mo1V |
| Bush | SF-1 | FB090 | FB316 | FB090 |
| Lower valve stem | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| Ball | WCB | ZG1Cr18Ni9Ti | ZG0Cr18Ni12Mo2Ti | ZG15Cr1Mo1V |
| Plate | Q235A | 1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti | 25Cr2Mo1V |
| Valve seat | Q235A+PTFE | 1Cr18Ni9Ti/PTFE | 0Cr18Ni12Mo2Ti/PTFE | 25Cr2Mo1V/PTFE |
| Ball crown | 1Cr18Ni9Ti | 1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| Upper valve stem | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| Filler plate | WCB | ZG1Cr18Ni9Ti | ZG0Cr18Ni12Mo2Ti | ZG15Cr1Mo1V |
| Valve cover | WCB | ZG1Cr18Ni9Ti | ZG0Cr18Ni12Mo2Ti | ZG15Cr1Mo1V |
| Bolt | 35 | 0Cr18Ni9 | 0Cr18Ni9 | 15Cr1Mo1V |
| Nut | 35 | 0Cr18Ni9 | 0Cr18Ni9 | 20CrMo |
| Filler | Soft graphite | Soft graphite | Soft graphite | Soft graphite |
| Gland | WCB | ZG1Cr18Ni9Ti | ZG0Cr18Ni12Mo2Ti | ZG15Cr1Mo1V |
| Bracket | WCB | WCB | WCB | WCB |
| Electric head | Assembly | |||
Packaging & Delivery
Frequently Asked Questions (FAQ)
This valve is exceptionally versatile, handling natural gas, steam, oil, acids, and alkalis, as well as difficult solid-bearing media such as coal powder, coal ash, mud, slurry, fibers, and granular materials.
During the closing stroke, the spherical crown rotates progressively against the valve seat with a mechanical shearing action. This automatically cuts through and dislodges scale deposits, ensuring a continuous tight seal even in severe slurry services.
Yes. Once system pressure is depressurized, the top valve cover can be disassembled to directly lift out the ball crown and support assembly. This top-entry design allows complete in-line inspection and maintenance, drastically cutting plant downtime.
The valve configuration supports soft seals rated for temperatures from -40°C to 200°C, and hard-facing metal seals capable of withstanding extreme thermal environments from -29°C up to 600°C.
The eccentric wedge geometry provides inherent compensation between the seat and ball crown. If minor wear occurs after prolonged cycles, turning the valve slightly further upon closing re-establishes a tight seal without immediate component replacement.
