product description
High-temperature and high-pressure power station gate valves are also called power station special valves, which are mainly used in the pipelines of various systems in thermal power stations to cut off or connect pipeline media. Applicable medium: non-corrosive medium such as water and steam. Compared with other valve products, power station valves are characterized by high temperature and high pressure, unique self-sealing design, the higher the pressure, the more reliable the sealing. Due to the special performance, technical characteristics and working conditions, the product has formed characteristics that other products cannot replace.
High-pressure power station gate valve use
Installed on water and steam pipelines as opening and closing devices.
Brief introduction of gate valve structure of high pressure power station
1. It adopts pressure self-tightening sealing structure, elastic gate, and the branch pipes at both ends are welded.
2. The sealing surface of the valve seat is made of cobalt-based cemented carbide plasma spray welding, which has good wear resistance and scratch resistance.
The disc sealing surface is hardened and nitrided.
3. The surface of the valve stem is treated with corrosion-resistant nitriding, which has good corrosion resistance and scratch resistance.
4. The opening and closing of the valve is controlled by an electric device. The electric device is equipped with a dedicated motor, a reducer, a torque control mechanism, an on-site operating mechanism, a hand, and an electric switching mechanism. In addition to local operation, it can also be operated remotely. .
Structural advantages of high-pressure power station gate valve:
High temperature and high pressure power station gate valves use temperature 450-570ºC, pressure PN1.6-70.0, nominal diameter 15mm-300mm Material: 1Cr5Mo, 12CrMorV, ZG12CrMoV are widely used in steel, metallurgy, chemical industry, electric power, energy power plants and other facilities.
Technical advantages of gate valve for high-pressure power station
1. The shell adopts two process options of forging and casting, with smooth appearance and uniform organization, which can meet the requirements of high temperature and high pressure; a full range of fully forged steel gate valves can be provided according to user needs;
2. Special materials are matched to ensure high hardness and poor hardness of the sealing surface; precision grinding, smooth and clean like a mirror, wear-resistant and corrosion-resistant, and effectively extend the service life;
3. The back seal design effectively protects the seal packing and prevents dripping;
4. Multi-channel testing such as high-pressure water intensity, high-pressure gas intensity, non-destructive testing, etc., to fully control the quality of pressure parts;
5. The surface of the valve stem is precision ground and hardened, which is resistant to scratches and corrosion, effectively reducing the opening and closing torque and making the operation easier;
6. The use of special corrosion-inhibiting packing structure design, temperature and pressure resistance, no corrosion, automatic lubrication, reduce opening and closing friction, avoid corrosion to the surface of the valve stem, and avoid leakage;
7. Two-way pressure-bearing seal design to meet the demanding requirements of various special working conditions;
8. Strict manual matching and research to ensure that the two-sided sealing surface coincides above 90%, and achieve bubble-level factory seal detection;
9. The unique elastic groove design of the gate of Z60 series automatically compensates for processing errors, adapts to high temperature conditions, and avoids seizure; Z62Y series is a double gate design, the gate automatically corrects processing errors, and always maintains 100% fit of the sealing surface. Particularly convenient for users to maintain on site;
10. The valve cover is designed with self-tightening seal, the higher the pressure, the more reliable the seal;
Main connection size and material
| Property and specifiecation |
|
Product type
PN(MPa)Nominal pressure
|
(MPa)Test pressure |
(MPa)
Working pressure
|
(ºC)
Working temperature
|
Appicable medium
|
|
Sheel test
|
/
Seal test
|
| Z960Y-250 |
25 |
37.5 |
27.5 |
- |
≤425 |
,,Water,steam |
| Z960Y-320 |
32 |
48.0 |
36.0 |
- |
≤425 |
| Z960Y-P54100 |
- |
30.0 |
22.0 |
P5410 |
≤540 |
Steam |
| Z960Y-P54170 |
- |
48.0 |
36.0 |
P5417 |
≤540 |
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