Product Overview
Thomas 107 Series Oil-Less Diaphragm Pump - 12VDC, 1.4 CFM, Vacuum and Pressure, Tested
Condition
Single unit available. Used, good to fair cosmetic condition with visible signs of use. One screw missing from the pump head and one screw missing from the motor cover. Fully tested and confirmed operational under 12VDC load. Maximum vacuum measured 20.5 inHg on an external test gauge; the installed gauge reads 18.5 inHg. To power the unit, connect +12VDC to the red wire and -12VDC to the mounts. Replacement hardware is recommended for full mechanical security before integration.
Ships same business day from Idaho. Packed carefully.
Product Overview
Thomas 107 Series, model 107CDC20-898 - an oil-less diaphragm pump rated for continuous 12VDC operation. Capable of generating vacuum or positive pressure depending on port orientation. The oil-less diaphragm design keeps the air path free of lubricants. Port size is 1/8" NPT on both inlet and outlet. The -898 suffix indicates an OEM configuration variant; core performance specs match the standard 107CDC20. Commonly integrated into mobile, battery-powered, and OEM systems where compact size and DC compatibility are critical.
Key Features
- Voltage: 12V DC
- Flow rate: 1.4 CFM free air
- Max vacuum: 22.9 inHg (rated) - 20.5 inHg confirmed on this unit by external gauge
- Max pressure: 35 PSI
- Current draw: 9.5 A full load
- Port size: 1/8" NPT inlet and outlet
- Motor: 1/10 HP permanent magnet
- Duty cycle: Continuous
- Oil-less diaphragm design - clean air path
- Functions as vacuum pump or compressor depending on port orientation
- Power connection: +12VDC to red wire, -12VDC to mounts
Applications
- Brake booster vacuum supply for EV conversions and large-cam engines
- Air suspension systems on RVs and coach buses
- Portable laboratory vacuum or air sampling equipment
- Medical and ambulance suction systems
- OEM pneumatic door and accessory systems
Frequently Asked Questions
Has this pump been function tested?
Yes. Powered on 12VDC and tested for vacuum performance. Achieved 20.5 inHg on an external test gauge. The installed gauge reads 18.5 inHg - the variance is consistent with gauge calibration differences.
What are the power requirements?
12V DC. Connect +12VDC to the red wire and -12VDC to the mounts. Full-load current draw is 9.5 A - use a supply or charging system capable of delivering at least 10 A continuously.
What are the port sizes?
1/8" NPT on both inlet and outlet. Systems using 1/4" NPT fittings will require an adapter.
Are the missing screws a problem?
The unit operated normally during testing with the screws absent. However, one screw is missing from the pump head and one from the motor cover. Replacement hardware is recommended before permanent installation for full mechanical integrity.
Tested under load and confirmed pulling vacuum - this Thomas 107 is ready to integrate. Wire it to 12V, connect your 1/8" NPT fittings, and put it to work.
