คำอธิบาย

Sell Vacuum pump 11.0KW, 380V 3 phase, option: 220V 3phase

Approximately:

11KW = 6.66 cubic meters per minute.
7.5KW= 4.66 cubic meter per minute

How this vacuum pump works

The pump uses water as a sealing ring inside the pump chamber.

Inside the pump:

• The impeller spins fast
• Water forms a rotating ring
• Empty spaces between blades become vacuum chambers
• Air gets sucked from the CNC table
• Air exits through exhaust
• Water stays circulating

Because of the water seal:

• It can create continuous vacuum
• Runs cooler than dry pumps
• Good for dusty woodworking environments

Simple working flow for CNC router

1. Fill water into tank

As your image says:

• Fill water first
• Wait around 10 minutes first use
• Water must reach seal area

If no water:

• Seal can burn
• Vacuum becomes weak
• Pump damaged

2. Connect hose to CNC vacuum table

Like this:

MDF board
↓
Spoilboard
↓
Vacuum table channels
↓
Vacuum hose
↓
Vacuum pump

The hose “A” in your image goes to:

• vacuum manifold
• vacuum table port

How vacuum holds MDF/wood

The pump does NOT “suck” strongly like a household vacuum cleaner.

Instead:

• It removes air under the board
• Atmospheric pressure pushes material downward

Air pressure from atmosphere:

$F=P\times A$

Meaning:

• Larger area = stronger holding force

This is why:

• Large MDF sheets hold very strongly
• Small parts may move easily

Why MDF works very well

MDF is slightly porous.

Air can pass slowly through MDF:

• Vacuum spreads evenly
• Whole sheet sticks to table

This is why CNC router shops usually use:

• MDF spoilboard
• Vacuum grooves/channels underneath

Typical CNC vacuum table structure

Vacuum table layers

Top workpiece
↓
MDF spoilboard
↓
Grooved vacuum table
↓
Vacuum zones
↓
Pump

Important: zoning system

Professional CNC routers divide table into zones.

Example:

• Zone 1
• Zone 2
• Zone 3
• Zone 4

Only open the zone being used.

Otherwise:

• Vacuum leaks
• Holding force weakens

Why your pump has water tank

This type pump:

• recycles water
• separates water from air
• cools the pump

Dirty water should be drained regularly.

Especially MDF dust:

• mixes into water
• creates sludge
• can damage seals

Your image point #4 is drain valve.

Main advantages for wood CNC

Good points

• Strong continuous vacuum
• Good for full MDF sheets
• Handles dust better
• Lower overheating risk
• Industrial durability

Weak points

• Uses electricity continuously
• Noisy
• Uses water
• Needs maintenance
• Small parts may still require tabs/screws

Very important for small pieces

Vacuum works best for:

• full sheets
• cabinet panels
• doors
• acrylic sheets

For tiny parts:

• vacuum area too small
• holding force drops

Then users add:

• tabs
• pods
• clamps
• double-sided tape

Typical vacuum level

Wood CNC vacuum usually:

• not extremely high vacuum
• but high airflow

Because MDF leaks air naturally.

Typical:

• High airflow (CFM/m³h)
• Medium vacuum pressure

For wood CNC:

• airflow is often more important than maximum vacuum pressure.

Common setup for 4×8 CNC router

Typical:

• 5.5kW–15kW liquid ring vacuum pump
• MDF spoilboard
• Zoned vacuum table

Large industrial machines:

• 2 pumps
• 3 pumps
• regenerative blower + liquid ring combo

Most common beginner mistake

Biggest mistake:

• no vacuum leak control

If spoilboard surface not flat:

• air leaks everywhere
• vacuum becomes weak

Usually shops:

• surface skim MDF spoilboard regularly

Why wait 10 minutes after filling water

Your image note is correct.

Because:

• seal area must absorb water
• mechanical seal needs lubrication first

If immediately start dry:

• seal overheats
• seal cracks
• leakage occurs

Summary

This pump:

1. Uses water ring to create vacuum
2. Removes air from under MDF
3. Atmospheric pressure clamps material down
4. Works best with porous MDF spoilboard
5. Needs water + good sealing + zoning