Tosei Engineering PSL-101A Dual Piston Pump 250W 117V 50/60Hz Vacuum Pressure

Tosei Engineering PSL-101A Dual Piston Pump 250W 117V 50/60Hz Vacuum Pressure

The Tosei Engineering PSL-101A is an oil-less dual piston pump designed to generate both vacuum and positive pressure from a single compact unit. It runs on a 4-pole 250W motor at 117V 50/60Hz and was originally integrated into Toshiba Automation laboratory equipment, where one piston handled vacuum duty and the other handled pressure. The oil-free piston design keeps maintenance low and avoids oil contamination — a key advantage in lab and automation settings.

Specifications & What's Included

• Manufacturer: Tosei Engineering Co., Ltd.
• Model: PSL-101A
• Type: Oil-Less Dual Piston Pump
• Motor Power: 250W
• Motor Poles: 4P
• Voltage: 117V
• Frequency: 50/60Hz
• Configuration: Dual piston — one piston for vacuum, one for pressure
• Design: Oil-free / oil-less piston mechanism
• Form Factor: Benchtop with mounting base plate
• Includes: Pump unit with capacitor and wiring leads attached
• Previously installed in: Toshiba Automation laboratory equipment
• Serial Number: 96H0927 (visible on nameplate)

Applications

Oil-less piston pumps like the PSL-101A are widely used in laboratory automation, analytical instrumentation, medical devices, and light industrial systems where a clean, oil-free vacuum or pressure source is needed. The dual-piston configuration — with one head providing vacuum and the other pressure — makes this type of pump useful in systems that require both functions simultaneously, such as pick-and-place automation, liquid handling instruments, and sample processing equipment. Tosei Engineering is a Japanese manufacturer known for supplying pumps and blowers to industrial and laboratory OEM builders; this unit was originally spec'd into a Toshiba Automation system, reflecting the kind of OEM integration common in late-1990s Japanese lab automation equipment. The oil-free design eliminates the need for oil changes and reduces the risk of contaminating sensitive samples or pneumatic circuits, making it practical for clean or semi-clean environments.