SPDT pressure switch

YK Series Single Cut Double Thrower Auto-reset Pressure Control

(YK-01H YK-02H YK-03H YK-01L YK-02L YK-03L)

█ Product Specification

◆　Single cut double thrower switch mode, double circuits commutate automatically

◆　Security and reliability by adopting fusion welding stainless steel pressure inductor and full air-tight connection.

◆　Adopting Eng. thread quick connector (copper flare connection) or brass tube welding fitting structure

◆　Plugging or wiring connection designed to customers’ choice.

◆　Any pressure value within 3~800 PSI (0.02~5.5MPa) can be made based on customers’ requirement.

◆　Pre-set pressure parameter before delivery allows direct use without resetting on the customers’ site.

█ Outline drawing

█ Operation principle

When pressure inside the system is higher than rated safe pressure, the sense disc starts to function instantly, resulting inpushing 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.

█ Technical data

◆　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

█ Electric contact form

.█ Connector drawing