The butterfly valve with anti-tamper switch can effectively prevent unauthorized operation or damage by integrating mechanical or electronic anti-tamper protection devices. It is mainly used in the following high-security scenarios:
Fire protection system
Automatic sprinkler fire extinguishing system
Installed at key locations such as sprinkler pump outlets and fire pipe network trunks to ensure that the valve remains open to avoid system failure caused by human error. After the anti-tamper switch triggers the alarm, it can be linked to the fire control center.
Typical configuration: DN100~DN300 caliber, made of ductile iron or 304 stainless steel, protection level IP67.
Fire water tank and water pump control
Used in nodes such as fire water tank inlet and outlet pipes, water pump suction pipes, etc., to monitor the valve status in real time to prevent illegal water cutoff.
Industrial safety protection
Chemical and oil and gas pipelines
In pipelines for the transportation of flammable and explosive media (such as natural gas and liquefied petroleum gas), the anti-tamper switch is combined with the explosion-proof design (Ex d IIB T4) to prevent tampering and leakage accidents. Electronic anti-tampering devices can output 4~20mA signals to the DCS system for remote monitoring.
High temperature and high pressure environment
Metal hard-sealed butterfly valves (temperature resistance ≤425℃) are equipped with anti-tampering locks, which are used in steam pipelines of thermal power plants or high-temperature oil pipelines of refineries to ensure the controllability of valves under extreme working conditions.
Municipal and public facilities
Key nodes of water supply network
Used in core locations such as water plant outlets and booster stations to prevent illegal adjustment of flow or water quality parameters. Mechanical lock-type anti-tampering butterfly valves (such as DN400 cast iron valves) can reduce maintenance costs.
Sewage treatment monitoring
Install butterfly valves with anti-tampering switches at sewage lifting pump stations or discharge ports to prevent unauthorized valve operations from interfering with the treatment process, and electronic signals can be synchronized to the SCADA system.
Other highly sensitive scenarios
Energy infrastructure
Scenarios such as nuclear power plant cooling water systems and gas pressure regulating stations require that the valve status is absolutely controllable. The anti-dismantling device must be certified by CCCF or ATEX and be bound to the safety interlock system.
Safety protection of transportation hubs
In subway and tunnel drainage systems, anti-dismantling butterfly valves are used to prevent the risk of water accumulation caused by malicious damage and support automatic fault alarms.