Design And Principle Of Sanitary Stainless Steel Double Pin Clamp

For quick assembly of sanitary fittings in food and biopharma lines, the tri clover clamp provides a tool‑free, reliable connection. The double‑pin design uses two hinged pins that engage with the latch – ensuring even compression around the ferrule. Installation: place the clamp over two mating ferrules with a gasket between them, close the latch, and tighten the wing nut or screw to the specified torque (10–15 N·m for 2" size). The double‑pin action distributes clamping force uniformly, preventing gasket creep and leakage. Available in round shape, 1/2"–12" (DN10–DN300) with 0–10 bar pressure rating.

The Double‑Pin Mechanism – How It Works

The clamp consists of two hinged halves connected by pins on one side and a latch on the opposite side. The double‑pin design uses two pivot points, allowing the clamp to open wider than single‑pin designs.

• Even force distribution – two pins prevent twisting during tightening.

• Wider opening – easier to position over ferrules and gaskets.

• Reduced gasket damage – uniform compression prevents over‑compression.

A tri clamp with double‑pin construction is standard for hygienic connections requiring frequent assembly and disassembly.

Performance Specifications

Double‑pin clamps are available in SS304 or SS316L. SS316L provides added corrosion resistance for CIP and high‑purity applications.

Types of Tri Clover Clamps

• Standard clamp – double‑pin design with wing nut tightening.

• Long‑bolt clamp – for high‑pressure or vacuum applications.

• Quick‑connect clamp – with cam‑type latch for faster operation.

A 1.5 tri clamp is commonly used on 1.5" OD sanitary tubing. A 2 tri clamp fits 2" OD tubing. For smaller lines, a 3 4 tri clamp (0.75" OD) is available.

Design Features

• Double‑pin hinge – provides stable opening and prevents misalignment.

• Wing nut or screw adjustment – enables tool‑less tightening.

• Forged or cast body – offers strength without excess weight.

• Sanitary finish – electropolished surfaces resist corrosion.

Advantages of Double‑Pin Clamps

• Reliable sealing – uniform compression around the ferrule.

• Fast operation – opens and closes without tools.

• Durable construction – stainless steel withstands CIP chemicals.

• Low maintenance – no springs or complex mechanisms.

Typical Applications

• CIP supply lines – quick connection of hoses to fixed piping.

• Filling and transfer lines – rapid changeover between product runs.

• Biopharmaceutical – aseptic connections requiring frequent disassembly.

Installation and Maintenance

1. Align two ferrules with a sanitary gasket between them.

2. Open the double‑pin clamp and position it over the ferrules.

3. Close the latch and tighten the wing nut or screw evenly.

4. Do not overtighten – follow recommended torque for the clamp size.

5. Inspect gasket and clamp regularly for wear, corrosion, or deformation.

The double‑pin tri clover clamp delivers a reliable, tool‑less connection with uniform sealing force for sanitary lines requiring frequent assembly and disassembly.

Sanitary Stainless Steel 13mhhm Double Pin Pipe Clamp

• Sanitary tri clamp is an essential part of tri clamp fitting. Size from 1/2" to 12", All our sanitary fittings ferrule is produced by CNC lathe machine, having the high purity surface and meet the requirement of food, Beverage, Dairy, pharmacy etc industries. sanitary fittings ferrule standard length is 12.7mm or 21.5mm.  

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