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RESTRICTORS

Restrictors Lee restrictors feature small size, precision performance and long life. Single orifice and multi-orifice models cover a wide range of restriction and can be customized to meet special requirements.   

Lee IMH Orifices are economical, reliable, highly accurate miniature restrictors. Available in stainless steel and brass models, these calibrated orifices are 100% flow tested in both flow directions to ensure that every part is within the specified flow tolerance. Flow tolerances as tight as ±2% are possible only if entrance and exit conditions of the orifice are closely controlled. This provides far more accuracy than orifices specified by hole size alone. An ordinary drilled hole held to a very tight tolerance will not result in a tight flow tolerance.

Features and Advantages

Restrictors 
  • Lee Orifice experience - maximum reliability
  • Ideal for fragile castings - eliminates cracking of brittle materials
  • Controlled expansion - ensures consistent performance
  • Various diameters available - design flexibility
  • One piece design facilitates reliable automated or manual installation
  • No threads or sealants required

The Lee IMH Orifice is a pre-assembled, one-piece, insert specifically engineered to seal fluid passages in metal castings and plastic housings leak-tight, without the use of threads or sealants. Controlled expansion during installation causes the lands and grooves on the O.D. of the plug body to bite into the wall of the fluid passage, creating a leak-tight seal and assuring retention.  

 

IMH Orifice for Liquids

IMH Orifice for Liquids

5.5mm diameter

  • Simple installation, economical
  • Bidirectional flow
  • All stainless steel construction
  • Maximum working pressure differential: 21 MPa (3000 psi)
  • 100% Flow tested, for consistent flow performance  

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IMH Orifice for Gases (Brass)

IMH Orifice for Gases

2.5mm diameter brass orifice for pressing into plastic manifolds

  • Specifically designed for installation into plastics
  • Bidirectional flow
  • 100% Flow tested, for consistent flow performance
  • Simple installation, economical
  • Maximum working pressure differential: 0.7&nbspMPa (100 psi)  

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IMH Orifice for Gases (Stainless Steel)

IMH Orifice for Gases

2.5mm diameter 303 stainless steel orifice for pressing into plastic manifolds 

  • Specifically designed for installation into plastics
  • Bidirectional flow
  • 100% Flow tested, for consistent flow performance
  • Simple installation, economical
  • Maximum working pressure differential: 0.7&nbspMPa (100 psi)  

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RESTRICTORS IN LUER ADAPTORS 

 Restrictors

This highly accurate, miniature restrictor is preinstalled in a male to female luer adaptor, and features an integral safety screen to protect the orifice from contamination. Ideal for medical applications, the orifice and screen are 300 Series stainless steel and the adaptor is made of medical grade polypropylene.Designed for both liquid and gas applications, the orifices are 100% flow tested on either water or nitrogen to ensure that each part is within ±5% of its nominal flow rate. This provides far more accuracy than orifices specified by hole tolerances.

 

Restrictors in Luer Adaptors

Available in Lohm rates from 5,000 to 45,000 in ±2% and ±5% tolerance versions.

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For more detailed product information:

Visit The Lee Company Industrial Microhydraulics website.