Vacuum Entry Port Mounting Types and Specifications

The document categorizes vacuum entry port mounting options based on buffer presence, rotation capability, and size ranges. Stroke lengths vary by pad diameter groups: ø2–8 mm (6, 10, 15, 25 mm), ø10–32 mm (10, 20, 30, 40, 50 mm), and ø40–50 mm (10, 20, 30, 50 mm). Connection types include male thread, female thread, one-touch fitting, and barb fitting, supporting various tubing diameters.

Vacuum Pad Forms and Materials

Vacuum pads are available in multiple forms: flat, flat with ribs, deep, bellows, thin flat, thin flat with ribs, and elliptic. Diameters range from 2 mm to 125 mm depending on series. Materials include NBR (black), silicon rubber (white), urethane rubber (brown), fluoro rubber (black with green mark), conductive NBR (black with one silver mark), and conductive silicon rubber (black with two silver marks). Each material is characterized by durometer hardness, operating temperature range, and resistance properties (oil, gasoline, benzol, acids, weather, ozone, abrasion, water, solvents).

Pad Material Characteristics

A detailed table summarizes material properties:

• NBR: Hardness 50°, operating 0–120°C, limited oil/gasoline/benzol resistance, good acid, weather, ozone, abrasion, waterproof, solvent resistance.
• Silicon Rubber: Hardness 40°, -30–200°C, no oil/gasoline resistance, good benzol, acid, weather, ozone resistance, no abrasion or waterproof resistance.
• Urethane Rubber: Hardness 60°, 0–60°C, limited oil/gasoline/benzol resistance, no acid/weather resistance, good abrasion and waterproof resistance.
• Fluoro Rubber: Hardness 60°, 0–250°C, excellent oil/gasoline/benzol/acid/weather resistance, no ozone resistance, good abrasion and waterproof resistance.
• Conductive NBR and Silicon Rubber: Similar to base materials with conductivity and some limitations in solvent and oil resistance.

Note: All materials comply with JIS standards but are unsuitable for direct pharmaceutical or food contact.

Vacuum Pad Series and Related Equipment

The document references multiple vacuum pad series (ZPT, ZPR, ZPY, ZP) and related equipment models (ZA, ZX, ZR, ZM, etc.) for lift force and response time calculations. Connection threads include M4, M5, M6, M8, Rc, NPT, and NPTF.

Pad Dimensions and Connection Details

Comprehensive dimensional data covers pad diameters, hexagon widths across flats, stroke lengths, buffer body sizes, and mounting thread dimensions. Variations exist for vertical and lateral vacuum entry ports, with or without buffers.

Design and Maintenance Precautions

• Design Cautions: For heavy or hazardous workpieces, implement drop prevention due to possible vacuum loss or pad wear.
• Pad Material Selection: Choose materials based on environment; avoid pharmaceutical or food contact.
• Pad Quantity and Arrangement: Adjust pad size, number, and shape per workpiece characteristics and perform vacuum adsorption testing.
• Buffers: Recommended for fragile items or height variations; detent buffers assist positioning.
• Maintenance: Inspect pads regularly for damage; avoid lateral forces and impacts to prolong life.
• Transport Considerations: Account for acceleration, wind pressure, and impact forces; balance multiple pads for large flat workpieces.

Series ZPT Vacuum Pads (Vertical Vacuum Entry)

• Pad forms: flat, flat with ribs, deep, bellows, thin flat, thin flat with ribs, elliptic.
• Connection types: female/male threads, one-touch fittings, barb fittings.
• Stroke lengths: 10–50 mm depending on model.
• Mounting: vertical with specified hexagon widths and torque values (e.g., M8 x 1 at 2.0 N·m).
• Ordering codes include pad diameter, form, buffer type, material, and connection.

Series ZPR Vacuum Pads (Lateral Vacuum Entry with One-Touch Fittings)

• Pad forms and materials similar to ZPT.
• Connection: lateral vacuum entry with one-touch fittings, male/female threads.
• Thread sizes: M4 to M14.
• Detailed dimensional parameters for pad size, mounting, and vacuum port location.
• Buffers available with stroke lengths 6–50 mm; rotating/non-rotating options indicated.
• Ordering codes specify pad diameter, type, material, vacuum entry, mounting thread, buffer stroke, and rotation.

Series ZPY Vacuum Pads (Lateral Vacuum Entry with Barb Fittings)

• Pad forms: flat, flat with ribs, thin flat, thin flat with ribs, elliptic, deep, bellows.
• Connection: lateral vacuum entry with barb fittings or male threads.
• Applicable tubing: nylon and urethane tubes with matching outer diameters.
• Dimensions and models categorized by pad size and form with detailed measurements.
• Buffers and spring reactive forces specified; rotating/non-rotating variants available.
• Ordering codes include pad form, diameter, material, vacuum entry, mounting thread, and buffer options.

Series ZP and ZPY Adapters and Buffers

• Adapters and buffers categorized by pad diameter and construction type.
• Model codes indicate pad diameter range, thread diameter, and buffer type.
• Vacuum entry ports vary (N4, N6, U4, U6) and must be matched correctly.
• Buffer stroke lengths range from 6 mm to 50 mm depending on model.
• Assembly includes adapter, lock ring, pad, and buffer (if applicable).

Replacement and Maintenance Procedures

1. Lift lock ring and remove old pad.
2. Place new pad on adapter while holding lock ring.
3. Secure pad by returning lock ring to original position.

Regular inspection for damage (cracks, splits, abrasion) is critical; replace pads promptly to avoid failures.

Critical Recommendations and Best Practices

• Select pad form, size, and material based on application environment, workpiece characteristics, and conductivity needs.
• Match connection types and thread sizes carefully for secure mounting and vacuum integrity.
• Use buffers for cushioning and height variation compensation.
• Follow specified tightening torque values to prevent damage.
• Perform vacuum adsorption testing to validate pad arrangement and performance.
• Maintain regular inspection and timely replacement of pads and components.

Conclusion

This comprehensive technical document serves as an essential reference for engineers and technicians involved in vacuum handling system design, installation, and maintenance. It provides detailed specifications on vacuum pad forms, materials, mounting options, buffer configurations, connection types, and replacement procedures across multiple product series (ZPT, ZPR, ZPY, ZP). The inclusion of dimensional data, material characteristics, and best practice guidelines ensures reliable vacuum adsorption performance and operational safety in industrial applications.