Heavy Duty Air Compressor Pressure Switch 135 175 Psi Four Port 26 Amp With Unloader Valve Six Point Three Millimeter Connection And One Quarter Inch NPT Female Ports Pro Grade Relief Valve For Overload Protection

Heavy Duty Pressure Switch for 135-175 PSI with Unloader
✔️ Four-port manifold with 1/4 in NPT ports and 6.3 mm unloader

This heavy duty pressure switch is built for air compressors up to 175 psi. It provides precise cut-in/cut-off at 135-175 psi, includes a four-port manifold for mounting and optional gauges, and features an unloader valve to ease startup. Compatible with single-stage or two-stage compressors drawing up to 26 amps at 120V (or 12 amps at 240V).

✅ LF10-4H-1-NPT1/4-135-175 part number
✅ 6.3 mm unloader valve connection and 1/4 in NPT female ports
✅ Factory-set 135-175 psi cut-in/cut-off range
✅ Four-port manifold for gauges, relief valve, or outlets
✅ 26 A max at 120V (12 A at 240V) electrical rating
✅ Built-in On/Off lever and side-mounted unloader
✅ Includes relief valve for overload protection

💡 What is a pressure switch used for in air compressor systems and how does it protect your unit? It helps control when the compressor starts and stops by sensing tank pressure, reducing wear and preventing overload.
- Handy control of startup/shutdown cycles
- Keeps tank pressure within safe operating range
- Works with 1/4 in NPT ports and 6.3 mm unloader connections
- Suitable for single-stage and two-stage compressors