Sanitary Grade Stainless Steel 13eu Double Pin Clamp Design Features And Materials

A hygienic stainless steel 13EU double pin tri clover clamp uses two hinges and two bolts to balance clamping force around the flange. Each bolt draws its half of the clamp toward the flange from opposite points. The paired hinges share the pivot load, so the gasket compresses at a steady rate around the rim. This symmetry removes the tilted seal face that causes biased leaks on single-pin designs. The body uses SS304 or SS316L with a clamp connection.

Double Pin Symmetry and Load Balance

A single-pin clamp closes on one hinge and one bolt. Torque applies at one point. The flange compresses more on that side. The far side sees less load and may open a micro-gap.

The 13EU body carries two hinges and two bolts. Each bolt draws its half of the clamp toward the flange. The paired hinges share the pivot load.

• Two hinges share the pivot load

• Two bolts balance the clamping force

• Gasket compresses at a steady rate

• No tilted seal face, no biased leak

When both bolts reach the set torque, the flange sees near-equal pressure around its circumference. The gasket compresses at a consistent rate.

Fit with Standard Sanitary Connections

The 13EU clamp mates with standard tri clamp fittings. The flange dimensions follow the same profile as single-pin clamps. A line can switch clamp styles without changing ferrules.

A tri clamp joint seals through face-to-face contact of two ferrules. The clamp only supplies closing force. Any imbalance in that force shows up as a leak path at the gasket.

The double-pin layout keeps that force even. A tri clover clamp built this way holds seal pressure through pump vibration and thermal cycling.

The same body also fits standard tri clover fittings. This compatibility lets a line use one clamp style across different connection points without adapters.

Material and Surface Requirements

The clamp body uses SS304 or SS316L. SS316L resists corrosive products and repeated SIP cycles. SS304 covers less aggressive duty at lower cost.

Contact surfaces are machined and polished to Ra ≤ 0.8 μm. Electropolishing lowers roughness toward Ra ≤ 0.4 μm and reduces attachment sites for microbes. Smooth faces release soil during cleaning.

Installation and Maintenance

Correct tightening keeps the seal even. Tighten each bolt in stages rather than driving one bolt to full torque first.

1. Align both ferrules and seat the gasket.

2. Fit the clamp over the flange rims.

3. Tighten the first bolt to half torque.

4. Tighten the second bolt to half torque.

5. Return to each bolt and reach full torque.

Inspect the clamp for bent hinge pins or stretched threads at service. A deformed clamp cannot apply even force, so replace it rather than re-tightening.

Common Applications

Double-pin clamps serve lines that need a reliable seal under movement. The paired bolts hold compression where single-pin clamps loosen.

• Dairy and beverage transfer lines

• Brewery fermentation connections

• Pharmaceutical process piping

• Food processing pump outlets

• CIP and SIP circuit joints

A tri clamp fitting with the double-pin body suits vibration-heavy skids. The balanced load keeps the gasket seated without retorque between batches.

Frequently Asked Questions

How does a double-pin clamp stop biased leaks?
Two bolts apply force at opposite points. The load balances around the flange, so the gasket compresses evenly.

Does the 13EU clamp fit standard ferrules?
Yes. It mates with standard tri clover fittings and shares the same flange profile.

Why use two hinges instead of one?
Two hinges share the pivot load. A single hinge takes the full force and can bend under high torque.

Which material suits corrosive products?
SS316L resists corrosive media and repeated SIP cycles. SS304 covers standard food and beverage duty.

How often should the clamp be inspected?
Check hinge pins and threads at scheduled maintenance. Replace the clamp if it bends or the threads stretch.

Hygienic Stainless Steel 13EU Double Pin 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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