Ceramic Double Gate Valve
Ceramic hard seat and parallel twin-disc design for reliable isolation in abrasive, erosive and severe service.
Product Overview
The ceramic double gate valve uses a ceramic hard seat and parallel twin-disc design. The body is available in flanged or wafer configuration; the three-piece body and self-cleaning discs are suited to on-off service with particles, powders, slurry and abrasive media.
The shutoff rating can meet ISO 5208 Rate D or be engineered for zero leakage. Face-to-face length, flange dimensions and special configurations can be customized to the site piping and service conditions.
Components and Materials
| No. | Component | Carbon Steel Version | Stainless Steel Version |
|---|---|---|---|
| 1 | Pneumatic Cylinder | Aluminum Alloy | Aluminum Alloy |
| 2a | Bracket Bolt | AISI 1045 | ASTM A193 B8 |
| 2b | Nut | AISI 1035 | ASTM A1948 |
| 3 | Packing Gland Flange | ASTM A246 WCB | ASTM A351 CF8 |
| 4 | Packing | Flexible Graphite | Flexible Graphite |
| 5 | Valve Body | ASTM A246 WCB | ASTM A351 CF8 |
| 6 | Disc Connector | ASTM A246 WCB | ASTM A351 CF8 |
| 7 | Spring | 60Si2Mn | 17-7PH |
| 8 | Disc Adjustment Block | AISI 1045 | 13%Cr |
| 9 | Disc | Ceramic | Ceramic |
| 10 | Ceramic Sealing Ring | Ceramic | ZrO₂ Ceramic |
| 11 | Valve Seat | Ceramic | ZrO₂ Ceramic |
| 12a | Bolt | AISI 1045 | ASTM A193 B8 |
| 12b | Nut | AISI 1035 | ASTM A1948 |
| 13a | Gland Bolt | AISI 1045 | ASTM A193 B8 |
| 13b | Gland Nut | AISI 1035 | ASTM A1948 |
Performance
Ceramic Hard Seat
The ceramic hard-seat design gives the discs and sealing components strong abrasion and erosion resistance for isolation of abrasive and particle-laden media.
Parallel Twin Discs
The parallel twin-disc design and self-cleaning action reduce media buildup on the sealing surfaces and improve opening and closing reliability.
Configuration Flexibility
The body can be flanged, with wafer style available. A three-piece body simplifies manufacturing, assembly and maintenance; face-to-face length and connection dimensions can be configured to customer requirements.
Technical Parameters
Valve Design
·Ceramic hard seat, parallel twin discs
·Flanged body; wafer style available
·Three-piece body with self-cleaning discs
Pressure Rating
·PN10,16,40
·ASME Class 150,300
Size Range
·DN50–300 / 2–12 in (full bore)
·Reduced bore available
Operating Temperature
·-29℃~200℃(Max,+500℃)
·-20°F~390°F(Max,+930°F)
Shutoff Rating
·ISO 5208 Rate D
·Zero leakage available to customer specification
Design Standards
·Valve design and manufacture — ASME B16.34
·Face-to-face length — manufacturer standard or customer specification
·Flange dimensions — GB/T 9113, EN 1092-1, ASME B16.5
·Inspection and testing — GB/T 13927, JB/T 9092, API 598
Installation Dimensions
Face-to-face length follows the manufacturer standard or can be customized to customer requirements.
Flange dimensions can follow GB/T 9113, EN 1092-1 or ASME B16.5.
Confirm final installation dimensions against valve size, pressure rating, connection type and site piping requirements.