Single and Twin On-Board Air Compressor 12V 150 PSI

How we label data. Confirmed values are read from supplied stock and from the published data of this compressor family; reference values are published marketplace specifications and are shown for identification only; anything not published is withheld rather than guessed. Airflow, duty-cycle and current figures apply to the twin version; the single version is confirmed in writing on enquiry.

An on-board air compressor turns a 4×4 into its own air station: bolt the unit to the vehicle, run the loom to the battery and you have compressed air on demand for tyres, differential lockers and, with a receiver tank, small air tools. This is a single and twin compressor line, so the HF single and twin compressor you order can be matched to the space you have and to the airflow your tyres need.

The single cylinder air compressor is the compact choice for a tight engine bay or a locker-only installation. The twin cylinder air compressor doubles the pumping capacity: up to 174 L/min of free air and roughly 132 L/min at 200 kPa, with a 100% duty cycle, so it keeps running while you bring four large tyres back up to road pressure. Both versions are supplied as a 12V tire inflation compressor with a 150 PSI pressure switch, and a 24V version is available for trucks and buses.

Every unit leaves as a complete on-board air kit: a wiring loom and relay kit with a heavy-duty maxi fuse, the pressure switch, a dash switch, a sealed intake filter and a mounting bracket. That makes it an air compressor with pressure switch already resolved, not a bare pump. Add a coil hose and gauge and it works as a 4×4 tire inflator on the trail; add an air tank and it becomes a full onboard air supply for pneumatic tools. It is also a practical portable air compressor when the unit is packed into a carry case, and a steady high output air compressor line for accessory shops, 4×4 workshops and fleet builders.

Buyers usually reach HF-SINGLE-TWIN through searches such as “hf-single-twin”. All of them describe the same task: sourcing a replacement on-board air compressor (single or twin cylinder) for 4×4, SUV, pickup, expedition and fleet vehicles (12V DC; 24V version available).

Requests worded as “inflator tire gauge”, “portable air compressor for car tires” come from buyers comparing this on-board air compressor (single or twin cylinder) against what is already fitted for 4×4, SUV, pickup, expedition and fleet vehicles (12V DC; 24V version available).

Requests worded as “tire inflator air compressor”, “digital tire inflator” come from buyers comparing this on-board air compressor (single or twin cylinder) against what is already fitted for 4×4, SUV, pickup, expedition and fleet vehicles (12V DC; 24V version available).

Related searches including “tire pressure gauge with inflator” all describe the same replacement job, so they are covered by the details below for a on-board air compressor (single or twin cylinder) for 4×4, SUV, pickup, expedition and fleet vehicles (12V DC; 24V version available).

Reference / cross-reference numbers are published listings and are shown for identification only; they are not claims of origin or authorization.

• HF-SINGLE-TWIN — Listing model covering the single and twin versions
• CKMTA12 — 12V twin-compressor class reference for this size of unit (identification only)
• CKMTA24 — 24V twin-compressor class reference for this size of unit (identification only)
• CKMA12 / CKMA24 — Single-motor on-board compressor class reference (identification only)
• 135-150 PSI pressure switch — Confirmed on our own stock: Model is HF-SINGLE-TWIN (single or twin on-board air compressor).
• 174 L/min class — Duty cycle (twin): 100% — run time not limited by duty cycle — match this against your vehicle before ordering.

• Single cylinder air compressor or twin cylinder air compressor — both built on the same on-board platform.
• Twin version delivers up to 174 L/min free air with a 100% duty cycle.
• 150 PSI pressure switch cuts the pump in and out between about 135 and 150 PSI.
• Supplied as a complete on-board air kit with a wiring loom and relay kit.
• Sealed motor, sealed relay and matched air filter for dust and moisture resistance.
• 12V DC as standard, with a 24V version for truck and bus electrical systems.
• Works as a 4×4 tire inflator with a coil hose, or as onboard air supply with a receiver tank.
• Serviceable design that uses commonly available electrical parts and filters.

• Airflow (twin) is recorded as Up to 174 L/min free air for this reference.
• Motor runs but airflow is weak, so tyres barely inflate.
• Maximum pressure for this unit: 150 PSI / 10.3 bar (pressure switch cuts out between 135 and 150 PSI) — check it against the number stamped on your old part.
• Blown inline maxi fuse or an overheated relay in the wiring loom.
• Airflow (single) for this unit: Not published for this variant — confirmed in writing — check it against the number stamped on your old part.
• Air leaks at the quick-connect coupling or the intake filter thread.

• 1Choose the version and voltage that match your vehicle — 12V to 12V, 24V to 24V.
• 2Current draw (twin, 24V) for this unit: Approx. 14 A no load · 25 A under load — check it against the number stamped on your old part.
• 3Route the supplied loom away from exhaust and heat sources, then fit the sealed relay and inline maxi fuse.
• 4Wire the dash switch and the pressure switch per the guide, then check every joint for leaks.
• 5Run the compressor, confirm the cut-out and cut-in pressures, then secure the air filter and hose.
• 6If a receiver tank is fitted, pressure-test the tank and fit the drain cock before regular use.

• On-board air tanks and receiver kits
• Confirmed on our own stock: Gauge is Not included — tyre gauge or inflation kit available separately.
• Airflow (twin): Up to 174 L/min free air · approx. 132 L/min at 200 kPa — match this against your vehicle before ordering.
• Cylinders is recorded as Single or twin for this reference.
• Replacement air filters and service parts
• Tyre deflators and repair kits