316L Stainless steel compression fitting reducer straight connector

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316L Stainless steel compression fitting reducer straight connector

This high-performance tapered straight connector is designed for high-pressure, high-purity, and extremely corrosive environments. Manufactured from high-quality 316L low-carbon stainless steel, it provides reliable fluid system connections between different pipe diameters (Metric or Fractional), ensuring zero leakage even under extreme operating conditions.

Key Product Advantages:
Superior Material Performance: Made from 316L stainless steel, its lower carbon content compared to standard 304 or 316 effectively inhibits intergranular corrosion during welding or in high-temperature environments. Its excellent pitting resistance makes it ideal for marine, chemical, and semiconductor industries.
Dual Ferrule Sealing Technology:  Utilizing a classic dual ferrule design, the back ferrule provides strong support, while the front ferrule forms a perfect metal-to-metal seal. This structure can withstand extremely high vibrations and maintain tightness during significant thermal cycling.
Precision Tapered Connection: Specifically designed to connect two pipes of different diameters, it optimizes fluid transition, reduces the number of pipe fittings, resulting in simpler system routing and lower pressure loss.
Easy and Repeatable Installation: No welding, threading, or flaring is required. Installation can be completed with just a wrench, and it supports multiple disassemblies and reassemblies without damaging the sealing surface.

Typical Application Areas:
Oil and Gas: Instrument panel connections and corrosive environments on offshore platforms.
Semiconductor Manufacturing: Ultra-high purity gas delivery systems (VHP).
Laboratory and Analytical Instruments: Gas chromatographs, sampling systems.
Hydrogen Energy Industry: High-pressure hydrogen pipeline connections.

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(METRIC)

TUBE O.D. CATALOG

T1

T2

NUMBER

A

D1

D2

E

G1

G2

F

H

  3 

6

RU-3-6

40 

13.5 

15.8 

2.4 

12 

14 

14 

25.2 

  4 

6

RU4-6

40.2 

13.7 

15.8 

12 

14 

14 

25.4 

  6 

8

RU-6-8

42.9 

15.8 

16.7 

4.8 

14 

16 

16 

27.4 

  6 

10

RU-6-10

44.9 

15.8 

19.6 

4.8 

14 

19 

17 

29.5 

  6 

12

RU-6-12

48.1 

15.8 

23.8 

4.8 

14 

22 

19 

29.5 

  8 

10

RU-8-10

45.3 

16.7 

19.6 

6.4 

16 

19 

17 

30 

  8 

12

RU-8-12

48.7 

16.7 

23.8 

6.4 

16 

22 

19 

30.2 

10 

12

RU-10-12

49.4 

19.6 

23.8 

7.9 

19 

22 

19 

31 

12 

16

RU-12-16

52.8 

23.8 

24.3 

9.5 

22 

27 

24 

31.8 

12 

18

RU-12-18

54.8 

23.8 

24.8 

9.5 

22 

27 

27 

33.3 

18 

25

RU-18-25

60.6 

22.8 

24.8 

15.1 

30 

38 

35 

38.1 

20 

25

RU-20-25

63.1 

25.5 

31.7 

15.9 

32 

38 

35 

39.9 


(FRACTIONAL)

TUBE  O.D

    T1

In   mm

T2

CATALOG NUMBER

A

D1

D2

E

G1

G2

F

H

   3 

1/8

RU-3-01

36.9 

13.5 

14 

2.4 

12 

12 

12 

22.4 

   4 

1/8

RU-401

37.6 

13.7 

14 

2.4 

12 

12 

12 

23.4 

   4 

1/4

RU-402

39.9 

13.7 

15.8 

12 

14 

14 

25.4 

   6 

1/8

RU-6-01

41 

15.8 

14 

2.4 

12 

14 

14 

25.2 

   6 

1/4

RU-6-02

41.8 

15.8 

15.8 

4.8 

14 

14 

14 

26.2 

   8 

1/4

RU-8-02

42.9 

16.7 

15.8 

4.8 

14 

16 

14 

27.4 

   10 

1/8

RU-10-01

44.1 

19.6 

14 

2.4 

12 

19 

17 

28.5 

   10 

1/4

RU-10-02

44.9 

19.6 

15.8 

4.8 

14 

19 

17 

29.5 

   10 

3/8

RU-10-03

46.2 

19.6 

19.6 

7.1 

17 

19 

17 

31 

   12 

3/8

RU-12-03

49.4 

23.8 

19.6 

7.1 

17 

22 

22 

31 

   12 

1/2

RU-12-04

52 

23.8 

23.4 

9.5 

22 

22 

22 

31 

   18 

3/4

RU-18-06

54.5 

24.8 

24.4 

15.1 

30 

30 

27 

33.3 

   20 

3/4

RU-20-06

55.7 

25.5 

24.4 

15.7 

32 

30 

30 

34.8 

   20 

1"

RU-20-08

63.1 

25.5 

31.7 

15.9 

32 

38 

35 

39.9 

   22 

1"

RU-22-08

63.1 

25.5 

31.7 

18.3 

32 

38 

35 

39.9 

About Us
Ningbo Keshengli Stainless Steel Valve Co., Ltd.
Ningbo Keshengli Stainless Steel Valve Co., Ltd.

Our company specializes in the manufacturing and sales of stainless steel pipe fittings and valves in national (GB), American (ANSI/ASME), and British (BS) standards. We are equipped with advanced CNC machining centers, material testing and heat treatment facilities, a skilled technical team, and a robust production workforce. With a sound quality management system and excellent after-sales service, we sincerely serve customers worldwide.

Our main products include: ferrule-type fittings, threaded fittings, instrument fittings, instrument needle valves, instrument ball valves, ferrule needle valves, ferrule ball valves, compact high-pressure instrument needle valves, compact high-pressure instrument ball valves, and high-pressure check valves. The primary material is SS316 stainless steel. These products are widely used in petrochemical, petroleum, electric power, pharmaceutical, food, papermaking, marine, and general machinery industries.

We strictly control product quality at every stage and are committed to delivering superior quality through advanced technology and professional management. Adhering to the business philosophy of "Quality First, Customer Supreme, Integrity Foremost," we strive to build the "NB-KSL" brand image, better serve our customers, and work together with you to create a prosperous future.

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News
  • NB-KSL® fittings are supplied assembled and finger tight. Disassembly before use can allow the entry of dirt or other particles.

  • The NB-KSL® tube fitting is a mechanism used both to seal and to grip tubing. The mechanical advantage and geometry of this type of fitting produce a leak-tight assembly. To assemble, simply insert th...

  • NB-KSL® has produced high quality tube and pipe fittings in various materials for high-pressure applications since its establishment in 2007. As a result of tremendous efforts in research and developm...