Reducing Union

Straight configuration, tube fitting, tube adaptor / Everfit Technology CO., LTD. (EFT) is a vacuum component, vacuum fitting, processing equipment and system provider with almost 50 years of experience.

Tube fitting, straight connector
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Reducing Union

RU Series

Two-ferrule design, material can be stainless 316L or 316Ti (DIN 1.4571).

Straight configuration, tube fitting, tube adaptor

For Metric Tubes

T1 TUBE OD T2 TUBE OD PART NO. DIMENSION 
A D1 D2 E F G1 G2 H
4 3 RU4M-3M 38.0 13.7 12.9 2.5 12 12 7/16 24.0
6 4 RU6M-4M 40.0 15.3 13.7 2.5 12 9/16 12 25.0
8 6 RU8M-6M 42.5 16.2 15.3 5.0 14 5/8 9/16 27.4
10 6 RU10M-6M 44.5 17.2 13.7 5.0 17 19 9/16 29.5
10 8 RU10M-8M 45.5 17.2 16.2 6.0 17 19 5/8 30.0
12 6 RU12M-6M 47.0 22.8 15.3 5.0 20 7/8 9/16 29.5
12 8 RU12M-8M 48.0 22.8 16.2 6.0 20 7/8 5/8 30.2
12 10 RU12M-10M 49.0 22.8 17.2 8.0 20 7/8 19 31.0
16 12 RU16M-12M 52.0 24.4 22.8 10.0 24 25 7/8 31.8
18 12 RU18M-12M 53.5 24.4 22.8 10.0 27 30 7/8 33.0

For Fractional Tubes

T1 TUBE OD T2 TUBE OD PART NO. DIMENSION 
A D1 D2 E F G1 G2 H
1/8 11 6 RU2-1 33.0 12.7 8.6 1.5 10 7/16 10 22.0
3/16 1 /8 RU3-2 38.0 13.7 12.7 2.5 12 12 7/16 24.0
1/4 1/16 RU4-1 35.0 15.2 8.6 1.5 12 9/16 10 23.0
1/4 1/8 RU4-2 39.0 15.2 12.7 2.5 15.2 9/16 7/16 24.6
1/4 3/16 RU4-3 40.0 13.7 15.2 2.5 12 12 9/16 25.0
5/16 1 /4 RU5-4 42.5 16.2 15.2 5.0 14 17 9/16 27.5
3/8 1/8 RU6-2 41.0 16.8 12.7 2.5 16 11/16 7/16 26.9
3/8 1/4 RU6-4 43.5 16.8 15.2 5.0 16 11/16 9/16 28.4
1/2 1 /8 RU8-2 45.5 22.9 12.7 2.5 20 7/8 7/16 28.4
1/2 1 /4 RU8-4 47.0 22.9 15.2 5.0 20 7/8 9/16 29.5
1/2 3/8 RU8-6 48.5 22.9 16.8 8.0 20 7/8 11/16 31.0
5/8 3/8 RU10-6 49.5 24.4 16.8 8.0 24 25 11/16 31.8
5/8 1/2 RU10-8 52.5 24.4 22.9 10.0 24 25 7/8 31.8
3/4 1/4 RU12-4 49.3 24.4 15.2 5.0 27 1-1/8 9/16 31.8
3/4 3/8 RU12-6 51 .0 24.4 16.8 8.0 27 1-1/8 11/16 33.3
3/4 1 /2 RU12-8 54.0 24.4 22.9 10.0 27 1-1/8 7/8 33.3
3/4 5/8 RU12-8 54.0 24.4 24.4 12.0 27 1-1/8 25 33.3
1 1 /2 RU16-8 63.0 31.2 22.9 10.0 35 1-1/2 7/8 40.9
1 3/4 RU16-12 63.5 31.2 24.4 16.0 35 1-1/2 1-1/8 40.9
  • The A, D1, and D2 dimensions are in finger-tight.
  • The E dimension is the minimum nominal opening. These fittings may have a larger opening at connection end.
  • Fraction numbers are in inch size; the others are in mm size.
  • Dimensions are for reference only, and are subject to change without notice.

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Vacuum Component | Reducing Union Manufacturer - EFT

Based in Taiwan, EVERFIT TECHNOLOGY CO., LTD. is a Reducing Union | vacuum component supplier for various industries, including semi-conductor, pharmaceutical, bio-technology, cosmetics, food processing and structural engineering. Main product: 316Ti Stainless steel pipe, progressing cavity pump part, pipe tee fitting, valve actuator component, diaphragm valve, ferrule, KF flange, etc.

5,500 square meter plant, cleanroom (class 10,000) and ultra-pure water system to deliver the cleanest pipe fittings. Between the robot arm and adjustment of fixture and jig, EFT is moving toward to becoming a manufacturer of pipe fittings with high technology.

EFT has been offering customers high-quality stainless steel vacuum components since 1976, both with advanced technology and 47 years of experience, EFT ensures each customer's demands are met.

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