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LPS-F2 Vacuum Pressure Switch
● Fully welded diaphragm, zero leakage
●Mechanical principle, no power required
● High-quality microswitch with minimal dead zone
● The process interface is versatile, and both flanges and threads can be customized.
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Product Description
Product Overview Product overview
The LPS-F2 series diaphragm-type negative-pressure pressure switch features a fully welded stainless steel diaphragm design, offering a simple and user-friendly layout with minimal failure points. It effectively prevents liquid leakage and false operations. Primarily used in vacuum control applications, the device allows adjustable setpoints and requires no separate power supply. With its robust contact capacity, it greatly simplifies on-site installation and operation for users. This versatile product is widely applied across various industries—including petroleum, chemical processing, metallurgy, power generation, sugar production, pharmaceuticals, and more—where negative-pressure control is essential.
Measurement Principle Principle
A diaphragm-type pressure switch is a mechanical pressure switch that uses the mechanical deformation of a diaphragm to control the closing or opening of electrical contacts. When the pressure of the measured medium changes, the diaphragm undergoes a corresponding displacement, which is then transmitted via a linkage mechanism to a microswitch. Once the displacement reaches a preset value, it actuates the microswitch, causing its contacts to either close or open—thus signaling the pressure level. Adjustable pressure switches allow users to fine-tune the relationship between the linkage mechanism and the microswitch contact travel, enabling precise pressure control at either a fixed value or within a specific range, thereby achieving the desired operational purpose.
Performance Metrics TECHNICAL PARAMETERS
Measurement medium: Gas or liquid (For highly corrosive applications, please consult us).
Measurement range: -100–0 kPa
Housing material: Die-cast aluminum, with an epoxy resin coating and an external cover featuring a sealing washer.
NEMA Protection Rating: Meets NEMA 4X requirements
Set value accuracy: ±0.5%
Repeatability accuracy: <1%
Pressure interface: Standard 1/2 NPTF female thread, M20×1.5 male thread; special interfaces available upon request.
Electrical interface: M20×1.5 internal thread; special interfaces available upon request
Switch output: One single-pole double-throw (normally open + normally closed) output;
Ambient temperature: -40°C to +70°C
Environmental humidity: 5%–95%
Cycle Life: 1 million cycles
Protection Rating: IP67
Explosion-proof rating: Exde IIC T6 Gb
Dust Explosion Protection: ExtD A21 IP66 T80℃;
Contact capacity: Standard type: 380V, 15A; Explosion-proof type: 380VAC, 5A;
External dimensions APPEARANCE OF SIZE
Installation Requirements INSTALLATION
1. Do not operate with power on.
2. Weld the pressure-tapping line, and it’s best to install a shut-off valve on the line, allowing for easy removal of the valve during maintenance.
3. Install the switch in a location with minimal vibration and temperature fluctuations.
4. Please do not turn the housing-fixed switch directly; instead, use a wrench to tighten the connecting hex below.
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Tianjin Ling Yu Technology Co., Ltd.
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