YK series single-pole double-throw automatic reset pressure controller
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Product Details
Features
◆ Single-pole double-throw switch mode, double circuit automatic transfer.
◆ Fusion-welded sealed stainless steel sensor, fully enclosed switch structure is safe and reliable.
◆ Inch pipe thread quick joint or copper pipe welding type installation structure are available for selection.
◆ The connection method of insert or wire can be selected at will.
◆ It can be manufactured according to the pressure value required by users within the pressure range of 3~800PSI (0.02~5.5 MPa).
◆ The working pressure parameters of the product have been set in the factory as required before leaving the factory, and there is no need to set it again when using it.
Typical outline drawing


working principle
◆ This series of pressure switches are mainly manufactured by using the built-in stainless steel diaphragm that can flip in the opposite direction after sensing a certain pressure. When the diaphragm moves, a guide rod pushes the electrical contact (H) to open, and at the same time, the electrical contact (L) is turned on. When the system pressure drops, the diaphragm is reset instantly, and the electrical contact is automatically disconnected from the contact L and closed with the contact H under the action of the switch reed.
use
◆ This series of products are mainly used in air conditioning and refrigeration systems and precision pressure control systems, and can also be used for precise high and low pressure protection of various equipment and tools.
Design Parameters
◆ Working pressure range: 3~800PSI (0.02~5.5MPa)
◆ Bursting pressure: 5000PSI
◆ Ambient temperature: -30℃~+80℃
◆ System medium temperature: -50℃~+120℃
◆ Life times under rated current: 30,000 times, 50,000 times, 100,000 times are available for selection
◆ Electrical specifications: the conventional electrical capacity is 125VA at 24Vac, and the conventional electrical capacity is 375VA at 120/240Vac
◆ Safety withstand voltage: AC700V/S between the disconnected contacts, AC2000V/S between the terminals and the shell
◆ Safety withstand pressure: the pressure that the pressure controller can withstand does not affect the set value of the action.
| Maximum working pressure range | Safety withstand voltage |
| <145PSI(1MPa) | 250PSI (1.7MPa) |
| 145PSI(1MPa)~400PSI(2.75MPa) | 600PSI(4.1MPa) |
| >145PSI(2.75MPa) | 800PSI(5.5MPa) |
Typical structure diagram


Electrical schematic diagram

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