Sanitary Clamps

A sanitary clamp, also called a sanitary fitting, is used to seal two ferrules together quickly, securely and without creating sites where contamination can collect or that can harbor bacteria. Fast connections are important in pharmaceutical and biotech applications, in which pipe and tube connections are frequently disassembled for cleaning and equipment reconfiguration. A reliable leak-free connection is imperative to meet FDA requirements for sterile process control. Often sanitary clamps must perform at high pressure and temperature.

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Sanitary Clamp, Series SH Type I

The Series SH hygienic clamp incorporates a unique profile and twin hinge design for uniform compression. Eight different styles of wing nuts and hex nuts are available.

  • Material: 316 stainless steel.
  • Sizes: 1/2 to 12 inches.
  • Pressure: up to 870 psig.
  • Temperature: 450 degrees F and higher.
  • Bolt: single or double
  • Hinge: 2 pin
  • Fastener: wing nut or hex nut.
  • Standards: CE
Sanitary Clamp, Series SH Type II

The Series SH Type II hygienic clamp attaches with two bolts and does not have a hinge. Sizes start at six inches. A wide variety of wing nut and hex nut styles is available.

  • Material: 316 stainless steel
  • Sizes: 6 to 12 inches
  • Pressure: Up to 522 psi.
  • Temperature: 450 degrees F. and higher
  • Bolt: double
  • Hinge: None
  • Fastener: Wing nut or hex nut
  • Standards: CE
Sanitary Clamp, Series SSH (High Pressure)

The Series SSH hygienic clamp incorporates a unique profile and two bolts for greater clamping force. Suitable for high pressure applications. Stainless or brass hex nuts are available on stainless bolts.

  • Material: 304 stainless steel.
  • Sizes: 1/2 to 6 inches.
  • Pressure: up to 1,450 psig.
  • Temperature: 450 degrees F and higher.
  • Bolt: double.
  • Hinge: none.
  • Fastener: Hex nut brass or stainless steel.
  • Standards: CE
Sanitary Clamp, Series ASME

Designed for pressure vessels, filter housings and other applications. It meets the requirements of ASME section VIII Appendix 24 of the Pressure Vessel Code. All components of the ASME Clamp are made from fully traceable 316 stainless steel.

  • Material: 316 stainless steel (all parts traceable)
  • Sizes: 1 to 12 inches.
  • Pressure: up to 2,480 psig.
  • Temperature: 450 degrees F and higher.
  • Bolt: triple
  • Hinge: for ease of assembly
  • Fastener: wing nut or hex nut.
  • Standards: ASME Section VIII Appendix 24
Safety Sanitary Fittings and Clamps, Series Safety Clamp

The Safety Clamp protects workers by assuring the bolting mechanism cannot release suddenly while a worker is loosening the bolt. Releasing the Safety Clamp is only possible when the wing-nut has been significantly loosened to enable the smaller diameter of the bolt to swing through the sectioned gate, ensuring the Safety Clamp cannot be knocked or accidentally opened.

  • Material: 316 stainless steel.
  • Sizes: 1/2 to 12 inches.
  • Pressure: up to 870 psig.
  • Temperature: 450 degrees F and higher.
  • Bolt: safety feature prevents unintentional opening
  • Hinge: 2 pin
  • Fastener: wing nut or hex nut.
  • Standards: CE
Safety Sanitary Clamp, Series Lockout

An advanced version of the Shrouded Safety Clamp, having a domed nut. The shroud is extended in length and modified to accept a padlock to prevent unauthorized access.

  • Material: 316 stainless steel.
  • Sizes: 1/2 to 12 inches.
  • Pressure: up to 870 psig.
  • Temperature: 450 degrees F and higher.
  • Bolt: safety feature prevents unintentional opening
  • Hinge: 2 pin
  • Fastener: shrouded hex nut protected by lock.
  • Standards: CE
Sanitary Fitting Eliminates Deadleg, Series TCI

TCI ClampConnect™ virtually eliminates the dead space associated with a standard ferrule. Using a standard sanitary clamp connection, the TCI ClampConnect can be used with sight glasses, lights, instrumentation, rupture discs in pharmaceutical and biotech processes.

  • Material: 316 stainless steel (other nickel alloys available)
  • Sizes: 1/2 to 8 inches.
  • Pressure: up to 100 psig.
  • Temperature: 400 degrees F and higher.
  • Clamp: accepts any standard sanitary clamp
  • Standards: ASME VIII Division 2,   Mandatory Appendix 2
Hygienic Gaskets, Series Bio-LOK™

Virtually immune to degradation by commonly used CIP/SIP chemicals. Non-elastomeric sanitary-design gaskets are based on proprietary GYLON modified PTFE technology and are compatible with a wide variety of chemicals and processing applications. BIO-LOK™ gaskets are designed to not deform into the process flow stream, which could otherwise create areas where harmful bacteria could accumulate. Production date code traceability.

  • Material: modified PTFE
  • Size: ½ to 4 inches.
  • Temperature: 41°F to 356°F.
  • Pressure: up to 800 psig.
  • Standards: FDA, USP Class VI, DIN, ISO, BS, ASME-BPE, SMS.

Online Selection Guide

Sanitary Clamps

There are many considerations for selecting the ideal sanitary clamp, also called a Tri-Clamp. This online guide walks you through the steps.

Clamp Types

Clamps may fasten with a single bolt, having double pin hinges on the other side, or they may fasten with bolts on each sides (no hinge). Clamps required for certain high pressure ASME applications have three bolts, including a bolt on the hinge side. Other manufactures may offer clamps with a single pin hinge. We believe that two-pin types provide a more sturdy and even clamping force. In situations where ferrules from different manufacturers need to be mated, L.J. Star’s Advanced Coupling clamp has been designed to provide an efficient, leak-proof connection. The unique profile design pushes the ferrules into proper alignment with high clamping efficiency, reducing the chance of a failed connection.

Fastener Types

The clamp is tightened by screwing the fastener. Up to eight wing nut and hex nut fasteners are available, depending on the clamp type. An optional spring loaded dome nut keeps tension on the gasket during expansion and contractions of the ferrules due to temperature fluctuations.
For high pressure steam and similar applications, a safety clamp is available with a feature that prevents the sudden release of the clamp when the fastener backs off from vibration or expansion or contraction from temperature fluctuations.
The same clamp is also available with a shroud that can accommodate a lockout padlock preventing access by unauthorized personnel.


A beveled surface on the outside diameter of the ferrule mates with the inside diameter of the clamp. Tightening the clamp pulls the two ferrules together and creates a seal. Therefore, the size of the clamp is based on the size of the ferrules that it is mating. Sizes typically range from ½” to 12” for tubing and 4” to 12” for pipe. Sizes and dimensions are standardized by ASME BPE.
Note that the outside diameter of the flange is the same for 1/2” and 3/4” fittings, as well as for 1” and 1-1/2” fittings. Therefore, measure the outside diameter of the tubing, not the flange, when sizing gaskets.


A groove on the face of the ferrule provides a seat for the gasket. The sanitary clamp provides the mechanical force to compress the gasket between the two ferrules. Common gasket materials are Buna-N, EPDM, Fluoroelastomer, Silicone, and Teflon. Gasket material should be selected to be compatible with the material being transferred, as well as the operating pressure and temperature of the system.


Clamps are typically constructed of 304 or 316 stainless steel. The 316 stainless steel offers superior corrosion resistance.

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Best Practices for Sanitary Fittings

In the pharmaceutical and biotech world, the routine activity of disassembling, cleaning and reconfiguring clamp connections is essential to maintaining sterile process control. This white paper discusses helpful tips for installing, inspecting and maintaining clean and safe process clamp connections. Explore step-by-step guides, technical drawings/diagrams and specification tables.

ion and maintenance tips.

Sanitary fittings from L.J. Star are created for industries where hygiene, efficient flow and joint cleanliness are critical – ports, sanitary clamps, mounts and indicators.