Pressure Seal Bonnet Globe Valve Description
The pressure-sealed bonnet globe valve is a high-pressure valve that achieves self-tight sealing through the internal medium pressure of the bonnet. It is designed for extreme working conditions (high temperature and high pressure). The sealing performance of the bonnet increases with the increase of pressure. It is often used in key pipeline control in the power, petrochemical and other industries.
Structural composition and sealing principle
Bonnet sealing structure:
Use wedge-shaped sealing ring or elastic gasket to automatically press the connection surface between the valve body and the bonnet under the action of medium pressure to form a dynamic seal;
The sealing material is made of flexible graphite, metal spiral wound gasket or Teflon, and the temperature resistance range covers -50℃~550℃.
Other core components:
Valve disc and valve seat: The conical sealing surface is welded with Stellite alloy (hardness ≥HRC40), which can withstand particle erosion and high temperature deformation;
Valve stem: High-strength stainless steel (such as 17-4PH) is hard chrome plated to avoid jamming caused by high-pressure friction.
Pressure Seal Bonnet Globe Valve specification
|
item |
value |
|
Warranty |
12 months |
|
Type |
Manual cast steel stop valve |
|
Customized support |
OEM, ODM, OBM |
|
Place of Origin |
Henan, China |
|
Brand Name |
GNEE |
|
Application |
General |
|
Temperature of Media |
High Temperature, Medium Temperature, Normal Temperature |
|
Power |
Hydraulic |
|
Media |
Water |
|
Port Size |
DN15-600 |
|
Structure |
combination |
Pressure Seal Bonnet Globe Valve
Applications
| Industry | Application | Mechanism of action |
|---|---|---|
| Thermal Power Plant | Main steam pipeline isolation valve, withstands 540℃/25MPa steam shock, prevents backflow and protects steam turbine | High temperature creep resistance and self-tightening seal design |
| Petrochemical | Hydrogenation reactor inlet and outlet control, resistant to 42MPa high pressure and hydrogen sulfide corrosion | Carbide sealing surface resists corrosion and wear |
| Nuclear power plant | The primary coolant isolation valve meets ASME III nuclear grade standards to ensure reliable sealing in radiation environments | Strict material certification and redundant sealing structure |
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