· Product Overview

· Core Specifications

Dimensions(Customizable; Typical Specifications as Example)

• Overall Height: 50mm
• Flange Diameter: 80mm (octagonal, side length ≈ 30mm)
• Central Hole Diameter: 25mm (inner thread M20, customizable for NPT/BSPT)
• Mounting Hole Quantity: 4 pcs (uniformly distributed on the octagonal flange, φ5mm)
• Thickness: 15mm (flange, varies with design)

Weight

Material

Process Standard

· Application Scenarios

• Oil & Gas Industry: Base for breather valves on fuel tanks, diesel storage tanks, or gasoline dispensing machines (prevents flame backflow during ventilation).
• Chemical Storage: Component for corrosive fluid tanks (acids, alkalis) in chemical plants (resists chemical erosion while regulating pressure).
• Pharmaceutical & Food: Breather valve bases for sanitary tanks (stainless steel version, easy to clean and sterilize).
• Industrial Machinery: Ventilation bases for hydraulic oil tanks, lubrication systems, or pressure vessels (maintains internal pressure balance).

· Production Process Introduction

1. Raw Material Selection: High-purity aluminum alloy or stainless steel bars are selected to ensure uniform material structure and corrosion resistance.
2. CNC Machining (3-axis/5-axis):
   • The octagonal flange, central hole, and mounting holes are precision-machined in a single setup to ensure coaxiality and positional accuracy.
   • Tapered transition sections are formed via milling to ensure smooth gas flow.
3. Thread Processing: For central internal threads (e.g., M20), precision tapping or thread milling is used to ensure tight sealing with valve components.
4. Surface Treatment:
   • Aluminum alloy: Hard anodizing (thickness 20–30μm) for enhanced wear/corrosion resistance, with a matte silver finish.
   • Stainless steel: Polishing or passivation to meet sanitary or high-corrosion requirements.
5. Quality Inspection:
   • Dimensional inspection via Coordinate Measuring Machine (CMM) for flange flatness, hole position accuracy, and thread tolerance.
   • Pressure testing (0.6MPa airtight test) to verify no leakage.
   • Flame retardant testing (simulated backflow scenario) to ensure compliance with safety standards.

· Packaging and Shipping Methods

Packaging

• Inner Packaging: Each base is wrapped in anti-scratch film and placed in a custom foam-lined box to prevent surface damage during transit.
• Outer Packaging: Sturdy cardboard boxes with “Handle With Care” labels; for bulk orders, wooden crates with reinforced corners are used to withstand heavy handling.

Shipping

• Logistics Options: Support DHL/UPS/FedEx (3–7 days for small batches) or sea freight (20–30 days for bulk orders). For hazardous environments (e.g., oil fields), specialized freight with hazardous material certification is available.
• Lead Time: Shipped within 48–72 hours after order confirmation; a tracking number and customs clearance documents (e.g., commercial invoice, packing list) are provided.

· Process

· Frequently Asked Questions (FAQ)