Scope of ISO-LF Components

The ease of assembly and disassembly of ISO components, together with the vast array of configurations available with this system result in a multitude of applications. ISO components may be used in rough vacuums, but are also totally reliable in vacuum systems with pressures to about 10-6 without baking and 10-8 with Viton® O-rings baked to about 150 degrees C. ISO-LF components have been used with total success in both rough and high vacuum applications.

Centering rings are available in either aluminum or 304 stainless steel with Viton® or buna O-rings. An aluminum spacer ring contains the O.D. of the O-ring which regulates compression of the ring and permits slight overpressure to a maximum of 30 PSIG.

Custom configurations are available and made to the same exacting requirements as standard components. Call our engineering staff to discuss your special needs.

Features of A&N ISO-LF Components

LF flanges are sexless, infinitely rotatable, self-centering, and available for either internal or butt welding.

LFB (bolted) flanges are sexless, self-centering, available for either internal or butt welding, and if bolted to a rotatable bolt ring (which contains an LF style flange) can be infinitely rotatable.

Flange interface dimensions are made to ISO standards and are interchangeable with all components made to these same standards.

LF components are made to exacting standards on computer controlled turning lathes. Tolerances and surface finishes are unsurpassed in the industry. Each component is individually shipped ready for use in any application.

Every welded assembly is helium leak checked aned certified to have a leak rate of less than 1x10 -9 std cc/sec.

Standard Flange dimensions shown below for this type Flange and other pertinent dimensions are shown in the tables for each component.

ISO Flanges, Cat E52

                         ISO Multi-Fastener                   ISO Bolted Flange
                       Flange (ISO-LF)                        (ISO-LFB)
Nominal    Suggested                                                                                             
Flange     Tube/Pipe                                                                                             
 Size        Dims:     A     B    No Clamps    C       D      E      F       N    Wrench           
Designation ODxWall   OD   thick  required     OD    thick   bolt   bolt   #holes                  
(mm)       (inches)                                        circle  holes                              

NW 63     2.5x.065   3.74   .47     3-4       5.12    .47    4.33     .35     4      13          
                 (95)   (12)              (130)   (12)   (110)     (9)                            
 
NW 80     3.0x.065   4.33   .47     4-8       5.71    .47    4.92     .35     8      13          
                (110)   (12)              (145)   (12)   (125)     (9)                            

NW100     4.0x.065   5.12   .47     4-8       6.50    .47    5.71     .35     8      13          
                (130)   (12)              (165)   (12)   (145)     (9)                            

NW160     6.0x.083   7.09   .47     4-8       8.86    .63    7.87     .43     8      17          
                (180)   (12)              (225)   (16)   (200)    (11)                           

NW200     8.0x.120   9.45   .47     6-12      11.22   .63   10.24     .43    12      17          
                (240)   (12)              (335)   (16)   (260)    (11)                            

NW250    10.0x.125  11.42   .47     6-12      13.19   .63    12.2     .43    12      17          
                (290)   (12)              (335)   (16)   (310)    (11)