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Double Gate Valve (Discharge Valve)
Double Gate Valve (Discharge Valve) LZJ‑D150‑TH, DN150, based on Harbin’s own coding conventions and the typical build of double‑gate discharge valves used in ash‑handling and bulk‑material systems in power plants.
Technical Specifications:
- Model: LZJ‑D150‑TH
- Type: Double Gate Valve (Discharge Valve)
- Nominal Diameter (DN): 150 mm (6″)
- Pressure Rating: Commonly PN10–PN16 for ash‑handling service; confirm with supplier for exact rating
- Connection Type: Flanged (GB/T 9113 or equivalent)
- Operation: Manual, pneumatic, or electric actuator (TH suffix often denotes actuator type or special sealing)
- Medium: Dry ash, pulverized coal, bulk solids, or slurry in pneumatic conveying/discharge systems
- Design Standard: GB/T 12234 (gate valves), adapted for double‑gate sealing
- Flow Path: Full bore, straight‑through
- Sealing Principle: Two parallel gates with intermediate wedge or actuator mechanism to ensure tight shut‑off
- Brand : HARBIN ELECTRIC VALVE
Typical Component Material List:
| Component | Likely Material Options |
|---|---|
| Body | WCB carbon steel or QT450 ductile iron |
| Gate Plates | Stainless steel (SS304/SS316) or wear‑resistant alloy |
| Seat Rings | Stainless steel (hardened) or hard‑alloy overlay |
| Stem | Stainless steel (2Cr13, SS304) |
| Packing | Flexible graphite or PTFE |
| Bonnet | WCB carbon steel |
| Fasteners | Alloy steel or stainless steel |
| Actuator Mount | Carbon steel or stainless steel |
In abrasive service (fly ash, clinker), gates and seats are often surfaced with Stellite or similar hardfacing to extend life.
Estimated Dimensions (DN150, PN10–PN16):
| Dimension | Approx. Value (mm) |
|---|---|
| Face‑to‑Face | 280–350 |
| Flange OD | ~285 (PN10) / ~300 (PN16) |
| Bolt Holes | 8 × Ø22 |
| Height (manual) | ~650–800 |
| Width (body) | ~220–250 |
Exact dimensions depend on actuator type and whether the bonnet is rising or non‑rising stem.
Functional Notes:
- Double‑gate design: Two gates move in parallel to isolate the medium, reducing wear on sealing surfaces and improving shut‑off in abrasive service.
- Discharge application: Commonly installed at the bottom of hoppers, silos, or ash coolers in thermal power plants.
- Maintenance: Seats and gates are replaceable; bonnet removal allows access without removing the valve body from the line.
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