SIL2 oil depot emergency shut-off valve
SIL2Emergency cut-off valve terminal
Alternative name: explosion-proof emergency shut-off valve of oil depot safety shut-off valve of oil depot
The emergency shut-off valve of SIL2 oil depot is in accordance with the specification of the State Administration of Work Safety: emergency shut-off valve is set in the tank farm of major hazard installations: the safety function can be realized through the basic process control (DCS or SCADA) system, or through the interlocking of the safety instrument (SIS) system. Further improve the monitoring and control facilities in the chemical tank farm. The high and low liquid level alarm of the storage tank shall be set according to the specification requirements, and the ultra-high liquid level automatic interlock shall be adopted to close the feed valve of the storage tank and the ultra-low liquid level automatic interlock shall be adopted to stop the material transportation. It is applicable to the oil inlet and outlet pipelines of oil tanks in oil depots and chemical plants (warehouses). When oil or chemical liquids spill, leak or fire occurs, the cut-off valve shall be closed to cut off oil or hazardous chemical liquids. Reduce accidents and fire accidents caused by leakage,
The types of SIL2 oil depot emergency cut-off valves include: pneumatic emergency cut-off valve for oil depot, electric emergency cut-off valve for oil depot, which are used for the storage and transmission of oil depot, dangerous chemicals, combustible gas/liquid, and the continuous collection and monitoring system of temperature, pressure, liquid level, flow, composition and other information, as well as the interlocking of combustible gas and harmful gas leakage detection alarm devices.
Technical parameters of emergency shut-off valve:
1. Valve body material: WCB carbon steel, 304316316L
2. Diameter and specification: DN15~DN100
3. Service temperature: - 50 ℃~120 ℃
4. Application pressure: PN1.6 ～ PN4.0MPa
5. Drive mode: electric, pneumatic/optional, electric power supply: 380V, 220V, 24V/optional
Installation function of emergency shut-off valve of oil depot:
In addition to high and low level alarms, SIL3 oil depot emergency shut-off valve shall also set corresponding alarm and linkage protection measures for low and high level tanks belonging to Class I or II major hazard installations. The tank root valve on its inlet and outlet pipes (the emergency cut-off valve shall take fire prevention measures, which shall have manual operation function and take fire prevention measures), and the SIS system shall be used to interlock and cut off the feed in case of emergency situations such as high liquid level of the tank and fire accidents; For the storage tank with independent SIS system, the control valve should be used for the tank root valve on the inlet and outlet pipes, and it should have the manual operation function. In case of emergency such as high liquid level of the storage tank and fire accident, the feed can be cut off through the interlocking of the basic process control system.
A main switch: shut-off valve shall be set near the tank body at the inlet and outlet pipes of storage tank materials. For large storage tanks, electric emergency shut-off valve or pneumatic emergency shut-off valve shall be used. When the actuator is electric, its power cable, signal cable and electric actuator shall be protected against fire.
The shut-off valve shall have the functions of automatic closing and on-site manual closing to prevent manual opening and closing of the shut-off valve due to other factors such as power off/on status or insufficient air supply in the plant area.
Meaning of explosion-proof emergency cut-off valve: whether pneumatic cut-off valve or electric cut-off valve is used, electronic components shall be explosion-proof, flameproof or intrinsically safe, and electric actuators shall be explosion-proof series.
Explosion proof emergency shut-off valve is a reliable and indispensable safeguard device to prevent oil leakage in oil depot, oil spill in oil tank, fire, explosion and other safety accidents. It plays a particularly important role in safeguarding property and personal safety. It is linked with liquid level gauge, combustible gas alarm and fire related safety instruments. When a safety accident occurs in an oil depot or chemical plant (depot), the cut-off valve will quickly close through the model of alarm output or emergency power failure, cutting off oil or chemical liquid, so as to prevent the possibility of accident escalation.
