China Vacuum Calibration Tank Factory
Keep Pipe Sizing Stable With The Right Vacuum And Cooling Configuration
Vacuum calibration tanks for PVC, HDPE, PE, and PPR pipe extrusion lines, built around your pipe diameter, wall thickness, line speed, and floor layout.
Whether you are building a new line or replacing a tank that no longer holds size, send your pipe and line specifications. We check tank length, vacuum capacity, water circulation, center height, and the connection to your extruder and haul off before anything is cut.
- Tank length from 3m to 12m, single or multi stage, matched to your line speed
- Vacuum pumps and water pumps sized to your pipe OD and wall thickness, not a fixed package
- Center height, rail width, and voltage configured to your existing line before shipment
Four Details And We Can Size The Tank
Send these with your inquiry and you get tank length, vacuum and cooling capacity, and a price back instead of a generic catalogue.
Pipe Material
01PVC, HDPE, PE, PPR
Sets the cooling length your pipe needs.
Pipe OD Range
0220 to 110 mm
Decides tank width and your sleeve list.
Line Speed
03Meters Per Minute
Faster lines need a longer tank.
Project Type
04New Or Replacement
A replacement also needs center height and voltage.
Size Your Calibration Tank Faster
Sixteen sections, from what has to stay stable inside the tank to acceptance testing on your floor. Jump straight to whatever matches where your project is right now.
What Must Stay Stable
Diameter, ovality, wall thickness
Tanks We Manufacture
Lengths, stages, pipe ranges
Choose The Right Tank
Length against your line speed
Common Problems
Oval pipe, scratches, size drift
Vacuum And Water
Pumps, zones, temperature
Sleeve Matching
Sizing per diameter and shrinkage
Tank Replacement
Swap without rebuilding the line
Line Integration
Center height, rails, voltage
Daily Operation
Start up, size change, handover
Maintenance And Cleaning
Filters, nozzles, seals, water
Factory And Manufacturing
Tank body, welding, machining
Pre Shipment Inspection
Leak test, vacuum test, packing
Acceptance Testing
What to measure before sign off
Buying Information
Lead time, packing, spare parts
FAQ
Voltage, sleeves, warranty
Four Conditions Your Calibration Tank Must Keep Stable
A vacuum calibration tank should do more than pull vacuum and circulate water. Its real job is holding your pipe dimensions steady through the sizing and first cooling stage, where the pipe is still hot enough to move.
Vacuum Calibration Tanks For Different Pipe Extrusion Requirements
Pick the tank configuration from your pipe material, size range, production speed, and calibration requirement. Tank length, chamber design, vacuum capacity, and water circulation are then matched to the line you actually run.
PVC Pipe Vacuum Calibration Tanks
For PVC pressure pipe, drainage pipe, electrical conduit, and other rigid PVC extrusion lines.
Configuration follows your pipe diameter, wall thickness, calibrator, and the production speed you need to hold.
Typical Applications
PVC pressure pipe, drainage pipe, conduit
HDPE And PE Pipe Vacuum Calibration Tanks
Built for PE and HDPE lines where sizing has to stay stable and the pipe needs enough initial cooling after the calibrator.
Pipe diameter, SDR, line speed, and cooling demand get reviewed together before tank length and vacuum capacity are fixed.
Typical Applications
HDPE pipe, PE pipe, water pipe, gas pipe
PPR Pipe Vacuum Calibration Tanks
For PPR lines that need consistent pipe sizing and controlled cooling through long continuous runs.
Configured around your pipe range, extrusion output, line speed, and the downstream equipment already on the floor.
Typical Applications
PPR water pipe, plumbing pipe
Single Chamber Vacuum Tanks
A practical configuration for most standard pipe applications, where one controlled calibration section covers your range and speed.
Choose it on your real pipe and line conditions, not on chamber count. More chambers do not automatically mean better sizing.
Best Considered For
Standard pipe ranges, conventional line speeds
Double Chamber Vacuum Tanks
Worth considering when your process needs a longer calibration section, or vacuum and cooling controlled separately.
Whether you actually need two chambers depends on pipe size, wall thickness, line speed, cooling demand, and your overall line layout.
Best Considered For
Higher cooling demand, longer calibration section
Not Sure Which Tank Fits Your Line?
Send your pipe material, OD range, wall thickness, and maximum line speed. We review the suitable configuration first, then quote it.
Do Not Select A Vacuum Tank By Pipe Diameter Alone
Two lines producing the same pipe diameter can still need different tank lengths, vacuum configurations, and cooling capacity. Send these six details together and the tank gets sized against how you actually run, not against a diameter on a datasheet.
Pipe Material
PVC, HDPE, PE, and PPR behave differently while they are being sized and cooled. Your material drives the calibration process, the cooling demand, and how the tank has to be configured.
Provide
Material type, product application
Pipe OD Range
Your smallest and largest diameter set the working range of the tank and the calibrator list. Useful, but on its own it will not tell anyone the right tank length or pump size.
Provide
Minimum OD, maximum OD
Wall Thickness
A thicker wall carries more heat that has to come out before the pipe holds its size. On PE pipe, the SDR tells us the real geometry faster than a diameter does.
Provide
Wall thickness, SDR if applicable
Maximum Line Speed
The tank has to give you enough calibration and cooling time at the speed you want to run. A tank that behaves at 6 m/min turns into your bottleneck the day you upgrade the line.
Provide
Normal speed, maximum speed
Extruder Output
Higher output means more hot material entering the calibration and cooling section every minute. Output only makes sense read together with pipe size, wall thickness, and line speed.
Provide
Maximum output in kg/h
Calibration Sleeve
Treat the calibrator and the tank as one sizing system, not two machines bought separately. If you are replacing a tank, your current sleeve drawing and connection details save the most time.
Provide
Sleeve size, length, vacuum connection, water connection
Replacing A Tank? Send The Line Dimensions Too
If the tank goes into a line you already run, send the current tank dimensions, center height, rail layout, and the cooling section length you have available. That is what stops you from buying a tank that can produce your pipe but cannot physically sit in your line. Photos of the inlet and outlet connections help as much as a drawing.
Common Problems In Pipe Calibration
Most calibration complaints show up on the floor long before anyone calls the tank supplier. If one of these looks like your line, the cause is usually in the vacuum, the cooling, or the match between calibrator and tank, not in the pump size.
Tell Us What Your Pipe Is Doing
Describe the fault, your pipe size and wall thickness, the speed it starts at, and the speed where it goes wrong. We can usually tell you whether it is a tank sizing problem or a calibrator and cooling problem before you spend anything.
Pipe OD Keeps Changing
Your diameter sits inside tolerance at the start of the run, then drifts out of range as production continues.
Usually points to vacuum fluctuation, uneven cooling, or line speed that is not holding steady.
Pipe Becomes Oval
The pipe leaves the calibration section without holding roundness, and the ovality is already fixed by the time it reaches the haul off.
Usually points to calibrator matching, uneven cooling distribution, pipe temperature, or line alignment.
Surface Drag Marks
Lines or scratches show up on the pipe surface around the calibration stage, and they get worse the harder you pull vacuum.
Usually points to excessive vacuum, friction inside the calibrator, or not enough water reaching the sleeve.
Unstable At Higher Speed
The line behaves at lower speed, then dimensions go unstable as soon as you push output up. This is the one that quietly caps your capacity.
Usually points to calibration and cooling capacity that no longer covers the time your pipe needs in the tank.
Frequent Manual Adjustment
Your operators keep touching vacuum or water through the shift just to hold size. Every size change becomes a person dependent job.
Stable production should not rely on constant manual correction, so treat this as a configuration issue, not an operator issue.
Nozzles Block Too Often
Blocked nozzles and dirty filters cut water distribution, so cooling stops being even across the tank.
Filtration, water quality, and easy cleaning access matter most when you run recycled process water.
Stable Vacuum And Water Make Calibration Easier
Your tank needs enough capacity for the pipe you produce, but stable running comes from more than pump power. Vacuum, water level, and cooling conditions all have to stay consistent from the first meter of the shift to the last.
System A
What The Vacuum Side Has To Hold
Keep Vacuum Stable
The vacuum you set should stay where you set it while the line runs. Large swings make sizing harder to control and put your operators back on the dial every few minutes.
Use The Right Vacuum
More is not better. Too little and sizing suffers. Too much and friction between pipe and calibrator climbs, which is where drag marks and unstable running start.
Match Capacity To Production
Vacuum capacity gets chosen from your pipe size, wall thickness, line speed, and calibrator requirement. Pump kW on its own tells you very little.
System B
What The Cooling Side Has To Hold
Maintain A Stable Water Level
A moving water level changes circulation and cooling inside the tank. Steady supply is also what keeps long runs from turning into constant manual correction.
Distribute Water Evenly
Nozzle layout and flow should cool the pipe all the way around, not soak two zones and starve the rest. Uneven cooling is how ovality gets built into the pipe.
Keep The System Clean
Filters, nozzles, and drainage have to be easy to reach and clean. That matters most when your line runs recycled process water, which is where blockages start.
Both Systems Get Configured Together
Vacuum and cooling are one job, not two options you pick separately. A pump sized without the water side, or a water circuit sized without the vacuum requirement, is where unstable sizing usually comes from. Send your pipe range, wall thickness, and maximum line speed and both get sized in the same configuration.
The Tank Must Match Your Calibration Sleeve
Your calibration sleeve and your vacuum tank do the first stage of sizing together. Their vacuum, water, and mechanical connections need to be confirmed before the tank is built, not after it lands on your floor.
One sizing system, two machines. If the vacuum, water, and centerline do not line up, the tank cannot hold your pipe no matter how it was specified.
Point 01
Vacuum Connection
The tank has to deliver the vacuum your sleeve needs without adding restriction or letting pressure wander during the run.
Point 02
Water Connection
Inlet, outlet, and circulation have to suit the sleeve design so cooling starts right at the calibration point, not a meter later.
Point 03
Position And Alignment
Sleeve position, tank inlet, and extrusion centerline all have to agree. Poor alignment turns every setup into a fight and never runs stable.
Send Your Current Sleeve Details First
Six items are enough for us to confirm the new tank against what you already run. We review them with the tank center height and inlet position before anything goes into production.
- Sleeve drawing
- Outside diameter
- Sleeve length
- Vacuum connection
- Water connection
- Current pipe range
Replace The Tank, Not The Whole Line
If your extruder, die head, and haul off still do the job, swapping the vacuum tank is usually the cheaper move. Four situations tell you it is the tank holding your line back rather than everything upstream of it.
Sign 01
Vacuum Is No Longer Stable
After years of running, older tanks pick up leakage, pump wear, and vacuum that will not sit still. A replacement gets configured around the pipe range and output you run today, not the one the tank was bought for.
Sign 02
Cooling Is Limiting Line Speed
Your extruder still has output left, but the tank cannot give enough calibration and cooling time once you speed up. A longer tank, or a different configuration, is what unlocks the capacity you already paid for.
Sign 03
Corrosion Or Water Leakage
Corroded panels, damaged piping, and repeat leaks turn into maintenance hours and stopped production. At some point replacing the tank costs less than patching an aging one every quarter.
Sign 04
Your Production Range Has Changed
A tank picked for your original pipe range will not follow you into larger diameters, thicker walls, or higher output. Select the replacement around what you plan to produce now and next year.
Send Photos Before You Send A Purchase Order
Send your current tank photos, pipe range, maximum line speed, and the one problem you most want solved. We confirm first whether replacing the tank alone actually fixes it for your line. If the bottleneck sits in the die or the haul off, you should know that before you buy a tank.
Make The New Tank Fit Your Existing Line
A replacement tank has to match more than your pipe size. Before production we go through machine position, center height, and every connection point, so the tank arrives ready to drop into the line you already run.
01
Center Height And Alignment
Tank inlet, calibration sleeve, and extrusion centerline all have to stay on the same line. Send your current center height and tank position so we check those dimensions before anything is welded.
02
Tank Size And Rail Position
Floor space, tank length, and rail layout get confirmed before the design is finalized. This matters most when a longer tank replaces a shorter one and the extra meters have to come from somewhere.
03
Water And Vacuum Connections
We review where your water supply, drainage, and vacuum connections already sit. Matching them keeps you from re piping half the line during installation week.
04
Electrical Connection
Send your local voltage and basic electrical requirements with the line information. Control and pump connections are then prepared for your actual site conditions before shipment.
Not sure which dimensions matter for your layout? Send photos of the current tank position plus your center height and we check the fit before the drawing goes out.
Photos And A Few Measurements Are Enough To Start
For an existing line you do not need a full drawing set. Phone photos of the tank position plus these seven items let us check the fit before quoting.
- Tank dimensions
- Center height
- Rail and floor layout
- Water connection
- Drain position
- Vacuum connection
- Voltage
Built For The Way Your Line Runs Every Day
A vacuum tank gets adjusted, watched, and operated every shift. Controls and working areas should be within reach so routine production does not turn into a two person job.
Start The Line
Before extrusion starts, your operator confirms water level, circulation, vacuum condition, and tank position. Clear gauges and controls you can reach make the calibration section quick to prepare before pipe enters the tank.
Keep Production Stable
Vacuum and water conditions have to be easy to watch without opening the tank or stopping the line. Viewing windows and clear indicators let your operator catch a change before it shows up in the pipe.
Change Pipe Sizes
Changing a die or calibration sleeve usually means moving and realigning the tank. Position and adjustment points should let one operator bring the calibration section back to the extrusion centerline without a struggle.
Finish The Shift
At the end of the run the tank should drain properly and the main working areas should stay easy to inspect. A simple shutdown is what makes the tank ready for the next shift instead of a morning job.
Easier Access Means Less Downtime
Your tank runs every day on pumps, valves, gauges, and water pipelines. When one part needs service, the only question that matters is how fast your team can reach it and change it.
Area 01 Pump Access
Vacuum and water pumps stay reachable for inspection and replacement without pulling apart large sections of tank or piping. If a pump change means stripping the cooling section, you lose a shift instead of an hour.
Area 02 Valves And Pipework
Valves, fittings, and pipelines are laid out so a leak, a loose connection, or a damaged part can be traced and serviced without unnecessary disassembly. Your maintenance team should be able to follow a line by eye.
Area 03 Gauges And Controls
Anything checked every shift sits where an operator can actually see and reach it. Gauges, sensors, and control devices mounted at working height save more time over a year than most people expect.
Area 04 Serviceable Parts
Confirm pump models, valves, seals, and other replaceable components before shipment. That list is what lets you stock parts locally instead of waiting on air freight the week your line stops.
Get The Spare Parts List In Writing
Ask for the model numbers of every wearing part while the tank is still in production. We send the list with the drawings so your store room is ready before the tank arrives.
Keep The Water System Easy To Clean
Water quality moves over time. Filters collect debris, nozzles restrict, sediment settles in the tank bottom. How easy that system is to clean decides whether your cooling stays consistent in month twelve or only in week one.
Filters Should Be Easy To Remove
Filters need checking often, and far more often once your line runs recycled process water.
Position them where an operator can pull, clean, and refit them without stopping the line for work that should take five minutes.
Nozzles Need Regular Attention
A restricted nozzle changes how water lands on the pipe, and uneven water is where ovality starts.
Easy access makes it quick to inspect, clean, or swap a single nozzle the moment cooling goes uneven, instead of guessing which zone is starving.
The Tank Should Drain Properly
Water and sediment should not sit trapped in the tank bottom after you shut down for the night.
Drainage points have to let the tank empty fully before cleaning or maintenance, so nobody starts a service job by bailing out standing water.
Internal Areas Must Be Reachable
The tank interior, pipelines, and spray areas all need to open up for inspection.
This one matters more every month. After a year of continuous production, a tank you cannot get inside is a tank you stop cleaning properly.
Tell Us Your Water Condition Before We Fix The Configuration
Recycled water, hard water, and high sediment all change how often your filters and nozzles need attention. Send your water condition and current filtration setup, and we review the filter, nozzle, and drainage arrangement together with the tank configuration rather than after you have lived with it for a season.
Built In Our Vacuum Tank Workshop
Every tank is fabricated and assembled around your confirmed pipe range and line configuration. Stainless steel fabrication, tank welding, internal water piping, spray nozzle layout, vacuum pipelines, pump installation, and final assembly all happen before anything ships.
Ask To See What Gets Closed Up
Check more than the finished machine. The parts you cannot see once the tank is closed are the ones that decide whether your cooling stays even and your vacuum stays stable a year from now.
- Internal water piping
- Spray nozzle layout
- Weld seams and sealing
- Vacuum pipeline routing
- Pump models and mounting
- Drain points and access
Checked Before It Leaves Our Factory
Before shipment we test the vacuum, water circulation, mechanical movement, electrical controls, and key dimensions. The point is to find an installation or operating problem in our workshop, while it still costs us a day instead of costing you a container and a service trip.
Test 01
Vacuum Stability Test
We run the vacuum system to confirm the required vacuum can be reached and held, with no abnormal fluctuation and no obvious leakage anywhere on the circuit.
Test 02
Water Circulation Test
Pumps, pipelines, and spray nozzles run together so we can see actual flow, spray coverage, and circulation inside the tank rather than assuming the layout works.
Test 03
Leakage And Drainage Check
Tank body, pipelines, valves, and every connection get checked for leakage. We also confirm the tank drains properly once the test water is released.
Test 04
Movement And Adjustment
Tank travel, positioning, and the available adjustment points are checked so the machine moves smoothly and your team can align it during installation.
Test 05
Electrical Function Test
Pump controls, sensors, switches, alarms, and emergency stop are all exercised before the electrical cabinet is closed for shipment.
Test 06
Dimensions And Connections
Center height, tank dimensions, and connection positions are measured against your approved configuration before anything gets packed.
Ask For The Test Records And Video
You do not have to take the inspection on trust. Ask for photos, test video, and the written record of the vacuum and water tests before the tank is packed. If you want to see it in person, tell us early and we schedule the test around your visit or a video call with your engineer.
Know What To Check Before You Accept The Tank
Accept the tank against its agreed configuration and its operating functions, not against how it looks in the workshop. These ten items are what we recommend going through during factory acceptance.
Ask for this list as a signed record. It also becomes your baseline when you commission the tank on your own floor.
Vacuum Build Up
Confirm the system reaches the agreed operating range after startup.
Vacuum Stability
Run it continuously and watch whether the reading holds without abnormal swings.
Vacuum Leakage
Check tank body, pipelines, seals, and connections for air leakage under working vacuum.
Water Circulation
Run the circulation pumps and confirm water moves correctly through tank and pipelines.
Spray Coverage
Look inside at nozzle operation and water distribution to catch blocked or uneven zones.
Tank Leakage
Fill and circulate water, then check welds, valves, pipelines, and joints for visible leaks.
Drainage
Drain after testing and confirm water discharges without pooling inside the tank.
Movement And Adjustment
Check tank travel and positioning adjustments for smooth, repeatable operation.
Center Height And Interfaces
Verify center height, overall dimensions, and connection positions against the approved drawing.
Electrical And Safety Functions
Test pump controls, switches, sensors, alarms, and emergency stop in the confirmed configuration.
What We Need Before We Quote
You do not need to prepare a technical document. Four groups of details are enough for us to start reviewing the configuration, and enough to keep you from receiving a quote for a tank that will not fit your line.
Your Pipe Specification
Send the pipe material, your minimum and maximum OD, and the wall thickness or SDR range you run. This is the foundation everything else gets checked against.
Your Production Target
Tell us your maximum line speed, and the extruder output if you have it. Those two numbers decide whether the tank length, vacuum capacity, and cooling section actually support the rate you want to run.
New Line Or Replacement
For a new line, the basic extrusion line configuration is enough to start. For a replacement, photos, dimensions, and your current tank drawing are worth more than any spec sheet.
Tell us what you want fixed as well. Unstable vacuum, not enough cooling, leakage, or a higher target line speed all point the configuration in different directions.
Site And Electrical Information
Send your required voltage, frequency, and installation location. If the tank has to fit an existing rail or a tight floor space, include those dimensions now rather than during installation week.
Have two of the four? Send what you have. Maggie will ask for the rest, and a photo of your line usually answers half of it anyway.
Frequently Asked Questions
The questions buyers send before placing a vacuum calibration tank order. If yours is not here, send it to Maggie and you get a straight answer rather than a catalogue.
01 How Do I Choose The Right Vacuum Tank Length?
Not by pipe diameter alone. Pipe material, wall thickness, line speed, extruder output, and the downstream cooling section you already have all decide how much calibration and cooling length you need. Send those production conditions before anyone fixes a tank length for you.
02 How Much Vacuum Does A Pipe Calibration Tank Need?
There is no single figure that covers every pipe. The level you need depends on material, geometry, calibration sleeve, and your production conditions. What matters is holding the required vacuum steadily, not running the highest vacuum the pump can reach.
03 Is Higher Vacuum Always Better For Calibration?
No. Too little vacuum makes sizing unstable, but too much raises friction between pipe and sleeve, which is where drag marks and unstable running come from. The right setting is whatever keeps your pipe sized correctly under your actual conditions.
04 What Can Cause Pipe Ovality After Calibration?
Uneven calibration, uneven cooling distribution, pipe temperature, tank alignment, or downstream pulling can all put ovality into the pipe. Do not assume it is the tank. Calibrator, vacuum system, cooling, and haul off should be checked together.
05 When Should I Use A Double Chamber Vacuum Tank?
Consider it when your process needs a longer calibration section, or vacuum and cooling controlled separately. Pipe size, wall thickness, line speed, and cooling demand decide the chamber configuration. Do not buy double chamber because it sounds more advanced.
06 Can I Replace Only The Vacuum Tank On My Existing Line?
Often yes. Before we confirm it, we check your existing center height, tank position, calibration sleeve, rail layout, water and vacuum connections, and installation space. That tells us whether the new tank integrates without rebuilding the line around it.
07 What Do You Need To Match My Existing Calibration Sleeve?
A sleeve drawing is the best reference. Without one, send the sleeve outside diameter, length, vacuum connection, water connection, and your current pipe range. Those confirm the tank inlet, connection arrangement, and centerline before manufacturing starts.
08 How Can Nozzle Blockage Be Reduced?
Filtration matters most, especially on recycled process water. Filter access, nozzle size and arrangement, water quality, and regular cleaning all change how fast deposits build. If your water carries scale or suspended particles, tell us before the configuration is finalized.
09 Can The Tank Become A Bottleneck At Higher Line Speed?
Yes, and it happens often. Your extruder may have output left while the existing calibration and cooling section cannot pull heat out fast enough. If you plan to raise line speed, review tank length, vacuum capacity, water circulation, and downstream cooling together.
10 Vacuum Calibration Tank Or Spray Cooling Tank?
A vacuum calibration tank sits at the start of the cooling section, where the pipe is still hot and needs vacuum assisted sizing plus initial cooling. A spray cooling tank sits downstream and keeps removing heat after the dimensions are already set.
On a new line, size both around your pipe specification and target production speed instead of selecting them independently.
Send Your Line Specs To Maggie
Pipe material, OD range, wall thickness, maximum line speed and voltage. That is enough for a real tank configuration and a quote back within 24 hours.
Maggie
Sales, QTech Machinery
Replies within 24 hoursEvery message from this page reaches me directly. Tell me what pipe you produce and how fast you run it, and I come back with a tank configuration, drawings and a real quote, not a brochure.
If the bottleneck on your line is not the tank, I will tell you that before you order.
Maggie
Sales, Zhangjiagang Qinxiang Machinery Co., Ltd.
- Tank length, vacuum and cooling sized to your line speed
- Center height, rail width and voltage matched to your existing line
- Vacuum, water and leak tested before shipment, readings recorded
- Your details stay private, no sales spam
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