Vacuum Pump

The YELV / YELVD vacuum pumpis Yash Blowers’ duty-cycle workhorse — the pump you fit when a machine has to run every shift, every day, and cannot afford to stop. It delivers a steady 600 mm/Hg of vacuum on the suction side and up to 12 psi of pressure on the discharge side, so a single motor covers both air services a production line typically needs.

Seven models span 8 to 72 m³/hr and 0.5 to 5 HP, in two drive layouts: compact direct-drive YELVD units for tight footprints, and belt-driven YELV units for cooler running and higher airflow. Whichever you choose, the duty rating is the same — you are selecting a mechanical layout to suit your machine, not compromising on performance.

The workhorse brief

This family leads in the printing and paper industries. On a mini-offset or offset press it lifts, separates and registers sheets on the feeder with vacuum, then floats and delivers them with low-pressure air — from one pump. The same qualities that make it good for print — continuous duty, dual air service, simple field maintenance — make it a dependable choice across packaging, converting, labelling and general factory vacuum.

Print and paper are where this pump proves itself. The demands are exact and unforgiving: a dropped or mis-registered sheet is scrap, and a stalled feeder stops the whole line.

• Mini-offset & offset presses — sheet pickup, separation, registration (vacuum) and sheet float / delivery (pressure).
• Paper folding & cutting machines — hold-down and feed control.
• Paper converting & UV coating — web and sheet handling.
• Screen & label printing — vacuum beds and take-off.
• Packaging & carton lines — pick-and-place, erecting and sealing.

Because the pump supplies both air services, an OEM can build a simpler, cheaper machine around a single Yash unit — and a print shop can standardise on one spare across a fleet of presses.

Installation

• Bolt to a flat, rigid base; leave room around the pump for cooling airflow and filter access.
• Fit a YEBL-FA suction filter at the inlet — paper dust is abrasive and will shorten element life if ingested.
• On YELV belt models, set belt tension and check pulley alignment; a slack or misaligned belt wastes power and wears fast.
• Keep suction and pressure hoses full-bore and short; plumb vacuum and pressure manifolds separately.
• Confirm motor rotation direction before loading the machine.

Maintenance schedule

• Daily / shift: glance at the inlet filter; clear paper dust build-up.
• Weekly: check belt tension and condition on YELV models; listen for bearing noise.
• Monthly: clean or replace the filter element; verify vacuum against 600 mm/Hg.
• Annually: inspect bearings and coupling; replace the belt as preventive maintenance on hard-run presses.

Keeping the Feeder Fed

On a running press, most vacuum faults are quick fixes at the pump — not pump failures. Check these first.

• Vacuum has dropped on the feeder — the suction filter is the usual culprit in a dusty press room; then look for a leaking hose or fitting, and on YELV models a slack belt. Clean the filter, seal the hoses, re-tension the belt.
• Sheets mis-registering or not lifting — the pump is not making enough vacuum for the stations connected. Clear the filter; if you have added stations, the pump may now be undersized — step up a model.
• Belt squeal or rapid belt wear (YELV) — pulleys are misaligned or the belt is slack. Realign and re-tension; replace a glazed belt.
• Pump running hot — a blocked filter or cooling path, or duty above rating. Clean, ventilate, and check the ambient is below 40 °C.
• No air at the delivery / blow side — the discharge line is blocked, kinked or leaking. Trace and clear it.

• Packaging & labelling — vacuum pickup, hold and sealing.
• Woodworking & CNC — vacuum clamping of sheet stock.
• Thermoforming & blister packing — forming vacuum and part release.
• General factory vacuum — bench stations, jigs and fixtures.
• Pneumatic feeding — using the discharge pressure for air knives and blow-off.