General Flange Information

Equivalence Table for Conflat Flanges in Common Use

O.D. Flange ¹
mm ¹ inch Type VG Scienta Din Standard Varian Balzers ² Leybold ² MDC Caburn
34 1.33 Bored ZFC19 DN 16 CF 954-5135 BP419 097 ³ 83541 F133075 CF34-19S
34 1.33 Blank ZFC90 DN 16 CF 954-5136 BP414 240 83501 F133000 CFB34
70 2.75 Bored ZFC38 DN 35 CF 954-5076 BP414 306 83542 F275150 CF70-38
70 2.75 Blank ZFC2 DN 35 CF 954-5077 BP414 296 83503 F275000 CFB70
114 4.5 Bored ZFC64 DN 63 CF 954-5078 BP414 307-R 83544 F450250 CF114-63
114 4.5 Blank ZFC4 DN 63 CF 954-5079 BP414 297-R 83504 F450000 CFB114
150 6.0 Bored ZFC100 DN 100 CF 954-5080 BP414 308-R 83545 F600400 CF150-100
150 6.0 Blank ZFC6 DN 100 CF 954-5081 BP414 298-R 83505 F600000 CFB150
200 8.0 Bored ZFC150 DN 150 CF 954-5086 BP414 309-R 83546 F800600 CF200-150
200 8.0 Blank ZFC8 DN 150 CF 954-5087 BP414 299-R 83506 F800000 CFB200
250 10.0 Bored ZFC200 DN 200 CF 954-5083 BP414 310-R 83547 F1000800 CF250-200
250 10.0 Blank ZFC10 DN 200 CF 954-5084 BP414 399-R 83507 F1000000 CFB250
Notes
(1) See table below for nominal and actual OD dimensions.
(2) Recess in blank flange, bored flanges have metric tube dimensions.
(3) Flange is not spigotted.
Conductances of Standard VG Ports Metric Tubes
Flanges suitable for metric tubes are available on request. Contact Tec hnical Sales Department for details.
Port Flange Conductance l/sec ¹
FC919 8
FC38 56 Tube Tolerance
FC64 160
All flanges are designed to suit standard stock tube to ASTM A269.
FC100 460
FC150 1220
FC200 2730
(1) Assumes use of standard port length.
Nominal Flange Analysis UNC Tapped Flanges
All flange OD dimensions are nominal.
Actual values are indicated below.		 All tapped flanges are available with metric or UNC thread sizes. Contact the Technical Sales Department for details.
Nominal OD mm Actual OD mm
34 34.0
70 70.0 Metric UNC equivalent
85 85.0 M4 8-32
114 113.5 M6 ¼-28
150 151.5 M8 5/16-24
200 202.5
250 253.0
300 305.0
362 362.0

 

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