Product  Specifications

◆ Adopt Eng. thread quick connector (copper flare connection) or brass tube (incl. capillary)

welding connecting structure, easy to mount for different needs.

◆ Board-assembly (with mounting ears) or wire-assembly (no need for separate fixing) can

be chosen for outer shell assembly.

◆ The air-tight bi-security disc and stainless steel sensor ensure that the switch opens instantly automatically under the pressure and cuts off the connection between the switch

contact and the pressure inside the system. The system will not be able to start up the machine by accidentally actuating the pressure switch, which is safe and reliable enough to prevent the machine from damaging.

◆ The independent structure design of auto switching off and manual resetting enhances the

maximum security and stability for the pressure protection.

Typical Outline Drawing

Operating Principle

◆ When pressure inside the system is higher than rated safe pressure, the sense disc starts to function instantly, resulting in pushing the security disc to the lock position by the rod and cutting off the switch by security disc through connecting rod at the same time. When the pressure reduces, the sense disc resets automatically while the security disc can’t reset because it is at the lock position,

hence the switch can’t cut in. The system will reset to normal status only when pressing the outside button to push the security disc

forcibly to unlock in order to cut in the switch.

Application

◆ The series of switches are used to all air conditioning and refrigeration systems that require special pressure protection and broad

range of extra-high pressure protection for the pressure systems of variety of tools and equipments. They can be directly installed on

the pipeline or on the control panel based on the equipments situation.

Designed  Parameter

◆ Working pressure range: 145~800PSI (1~5.5MPa)

◆ Burst Pressure: 5000PSI

◆ Ambient temperature: -30℃~+80℃

◆ System medium temperature: -50℃~+120℃

◆ Electrical Rating: At 24Vac, normal electric capacity: 125VA

At 120/240Vac, normal electric capacity: 375VA

◆ Dielectric Strength: Between disconnected contacts: AC700V/S Terminal to outer shell: AC2000V/S

◆ Safety proof pressure: The pressure that the control can endure while not affects the rated motion value

 Typical Structure Drawing

  Electric Theory Drawing

 Typical Connector Drawing