Electromechanical pressure switch LF08D

relativeNCfor air

Product overview
LF08D series is an automatic-reset pressure switch for control of air and water pressure in compressor and pump systems. It supports a wide setting range to cover low- and high-pressure applications in refrigeration, HVAC and industrial installations. Typical roles include high-pressure shut-off and pressure monitoring in air-conditioning and freezing equipment.

Applications

• Air compressor pressure control
• Water pump pressure control
• Electrical refrigeration and cooling systems
• Indoor air conditioners and internal cooling circuits
• Domestic cooling systems and remote condensing units
• High-pressure shut-down protection for HVAC and freezing equipment

Parameters (metric)
Model: LF08D
Pressure setting range (gauge): 0.02 MPa to 2.0 MPa (low pressure: ≤1.0 MPa; high pressure: >1.0 MPa)
Operating pressure / Tolerance / Withstand maximum pressure (gauge):
0.02 ≤ < 0.6 MPa — Tolerance: ±0.03 MPa — Withstand max: 1.5 MPa
0.6 ≤ < 1.0 MPa — Tolerance: ±0.03 MPa — Withstand max: 2.0 MPa
1.0 ≤ < 2.0 MPa — Tolerance: ±0.05 MPa — Withstand max: 3.0 MPa
Burst pressure (gauge): 5 MPa × 1 min (no damage, no leakage)
Operating temperature:
Ambient — Low pressure: -40°C ~ 65°C; High pressure: -40°C ~ 80°C
Medium — Low pressure: -40°C ~ 80°C; High pressure: -40°C ~ 100°C
Electrical parameters: 24–250 VAC / 0.02–15 A; 8–36 VDC / 0.02–15 A (UL)
Additional ratings: 120 VAC / 15 A; 250 VAC / 15 A (CE)
Note: For non-differential-pressure versions, maximum current limited to 0.5 A to ensure electrical life
Media: Air, water
Service life: Mechanical 100,000 cycles; Electrical 30,000 cycles (UL, CE)
IP rating: IP67
Certifications: CE, UL

Parameters (imperial / alternate)
Pressure range: 60–250 PSI
Proof/operating pressure: 20–50 PSI (application dependent)
Tolerance: ±5 PSI
Burst pressure: ~800 PSI (per table)
Operating temperature range: -20 ~ 65°C (application dependent)
Switch type: SPST (NC)
Electric rating: 220 VAC, 15 FLA (refer to selection table)
Base material: Q235 with environmental zinc plating
Endurance: 100,000 cycles
Connection: see selection table (customizable)

Features / Technical specifications

• Model: LF08D
• Function: Automatic-reset pressure switch for air compressors and water pumps
• Pressure setting range: 0.02–2.0 MPa
• Burst pressure: 5 MPa × 1 min (no damage, no leakage)
• Operating temperatures and limits listed by range (ambient / medium)
• Electrical ratings: 24–250 VAC / 8–36 VDC up to 15 A (UL) and CE options
• Media compatibility: Air, water
• Protection: IP67
• Mechanical life: 100,000 cycles; Electrical life: 30,000 cycles
• Certifications: CE, UL