PVC/uPVC Vacuum Calibration Tank

PVC/uPVC Vacuum Calibration Tank for Dimensional Stability and Gloss Control

Optimized specifically for rigid PVC and uPVC pipes, this vacuum calibration tank delivers rapid dimensional lock-in and mirror‑grade surface quality immediately downstream of the die. With segmented vacuum chambers, precision calibration sleeves, and a high‑uniformity water management system, it sustains OD accuracy, roundness, and cosmetic gloss at continuous production speeds—ideal for pressure lines, conduits, and decorative PVC tubing.

Product Features

PVC-Specific Engineering

Segmented vacuum zoning: independently tuned chambers ensure stable negative pressure along the tank length, preventing ovalization on thin-wall PVC and maintaining consistent OD.
Mirror-finish calibration sleeves: hardened stainless or chrome-treated sleeves with ultra-polished bores minimize friction, aiding high-gloss finish on rigid PVC/uPVC.
Uniform cooling hydraulics: balanced spray manifolds and laminar curtains create low-turbulence flow, avoiding water marks and haze while accelerating heat extraction.
PID vacuum orchestration: precise digital setpoints with buffering and anti-oscillation logic stabilize vacuum during ramp-up, line stops, and recipe transitions.
Clean-in-place design: sloped base, quick-drain ports, and accessible filtration reduce fouling and shorten sanitation cycles for consistent process water quality.
Corrosion-resistant build: 304/316 stainless tank and fittings increase service life and maintain hygiene in chloride-rich environments typical of PVC lines.

Material & Process Insights

Material focus: rigid PVC, uPVC, CPVC; compatible with co-extruded stripes and multi-layer constructs.
Thermal profiles for PVC: staged cooling minimizes residual stress and whitening on thick sections; optional pre-cool zones for large OD pipes.
Cosmetic fidelity: controlled flow kinematics and sleeve geometry reduce micro-scratches and melt imprint, supporting visible-grade finishes.

Application Areas

Building & Infrastructure

Potable and non-potable water pipes, drainage/sewer lines, electrical conduit, telecom ducts, irrigation tubes, and protective sleeves for civil installations.

Furniture & Interior

Decorative conduits, appliance connection pipes, cable routing tubes, and trim-related PVC tubing requiring consistent OD and gloss.

Automotive & Mobility

Washer/vacuum PVC lines, harness conduits, sensor housings, and auxiliary fluid pipes where dimensional precision is essential.

Industrial & Utilities

Instrumentation casings, pneumatic/low-pressure transport tubes, OEM specialty PVC pipes, and utility conduits with tight tolerance requirements.

Technical Specifications

Capacity & Accuracy

OD capability: typical 16–160 mm; custom designs available for micro-diameters or larger formats.
Line speed window: 2–30 m/min depending on wall thickness, cooling layout, and target tolerances.
Dimensional performance: supports industry-standard OD and roundness with appropriate calibration sleeve selection and zoning.

Tank, Vacuum, and Cooling

Tank length options: 6–9 m standard modules; extendable configurations for high-speed stabilization.
Vacuum system: 2–4 zones with independent setpoints; oil-sealed rotary vane or dry pumps, buffer tanks, silencers, and real-time vacuum monitoring.
Water circuit: stainless circulation pump, adjustable spray manifolds, laminar curtain inserts, inline filtration (≥100 μm), and plate/coil heat exchanger for temperature control.

Controls & Integration

PLC/HMI with multi-language interface, digital vacuum readouts, water temperature/flow monitoring, and alarm diagnostics.
Recipe library for sizes and materials; line-speed following via analog/pulse signals to synchronize with upstream/downstream equipment.
Safety architecture: interlocked covers, E‑stop circuits, low-level/overflow protection, and guarded access doors.

Energy & Utilities

Electrical load: 3.0–7.2 kW depending on pump, vacuum configuration, and cooling capacity.
Water requirement: closed-loop or single-pass; typical 3–11 m³/h based on tank volume and throughput.
Vacuum levels: configurable to PVC-appropriate ranges that maintain surface integrity without deformation.

User Recognition

Field Outcomes

Conduit manufacturer increased line speed while holding OD CpK by adopting segmented vacuum zones and laminar curtains, reducing polishing rework.
Irrigation pipe producer cut start-up scrap and improved roundness stability using PID-managed vacuum and ultra-polished calibration sleeves.

Customer Feedback

Operators commend predictable vacuum behavior and straightforward recipe swaps via HMI.
Maintenance teams note low corrosion, fast drain/clean cycles, and accessible filtration that limit downtime.

Competitive Positioning

PVC‑tuned mechanics and hydraulics deliver superior surface quality and stable dimensions in a compact footprint.
Efficient vacuum and cooling systems lower total cost of ownership through reduced energy consumption and extended component life.