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F83DJ DOUBLE SPHERE RUBBER FLEXIBLE JOINT
F83DJ DOUBLE SPHERE RUBBER FLEXIBLE JOINT - Image 2

F83DJ DOUBLE SPHERE RUBBER FLEXIBLE JOINT

Fig No.: F83DJ16 (PN16) / F83DJ25 (PN25)

GENERAL

  • Absorbs and reduces vibration and shock in the system.
  • Absorbs the stress generated by the expansion and compression of the pipe line.
  • Provides flexibility to the system as allowance connection and installation error.
  • Excellent resistance against pressure.
  • Control rods available upon request.

FEATURES

  • Molded and vulcanized in hydraulic presses.
  • Solid carbon steel internal reinforcing ring.
  • With BS 4504 PN16 / EN 1092-2 PN16 / BS 4504 PN25 / EN 1092-2 PN25 / ANSI Class 150 floating flanges (Specify on order).

APPLICATIONS

  • Building Services, Air-Conditioning, Fire-Protection, Cold Water Plumbing, Sewerage & Water Treatment, Marine Services, General Industries.
  • Suitable for suction and discharge within specify working pressure.
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Material Specification

Part Material
Flanges Ductile Iron (DN40…DN300)
Carbon Steel
Stainless Steel 304
Stainless Steel 316
Reinforcing Ring Carbon Steel
Inner Rubber EPDM
Outer Rubber EPDM
Reinforcing Cord Nylon
Control Rod Mild Steel

Notes: PN25 only available for carbon steel flanges.

OPERATING PRESSURE & TEMPERATURE

DIMENSIONs and movements

Diameter Dimension Pre-Gap Allowable Movements(mm)
mm inch L(mm) L(mm) Axial Elongation(mm) Axial Compression(mm) Lateral Displacement(mm) Angle of Deflection(“)
32 1¼ 175 170-180 20 30 45 30
40 1½ 175 170-180 20 30 45 30
50 2 175 170-180 20 30 45 30
65 2½ 175 170-180 25 50 45 30
80 3 175 170-180 25 50 45 30
100 4 225 220-230 35 50 35 30
125 5 225 220-230 35 50 35 30
150 6 225 220-230 35 50 35 30
200 8 325 320-330 35 50 30 30
250 10 325 320-330 35 50 30 15
300 12 325 320-330 35 50 30 15
350 14 345 340-350 25 40 28 10
400 16 345 340-350 25 40 28 10
450 18 345 340-350 25 40 28 10
500 20 345 340-350 25 40 28 10
600 24 345 340-350 25 40 28 10

 

USE OF CONTROL UNITS WITH RUBBER FLEXIBLE JOINTS

A control unit assembly is an accessory of two or more control rod units (limit rods, tie rods or compression sleeves) placed between the flanges across a flexible joint to minimize possible destruction caused by excessive motion of a pipeline. When used in this manner, control units are an additional safety factor which can minimize possible damage to the adjacent equipment.

A control unit is strongly recommended to use when:

  • In case that proper anchoring cannot be provided.
  • In case that it is hard to withstand the line thrusts generated by internal pressure or wide temperature fluctuations.
  • In case that the anticipated elongation, compression and lateral movement are more than the design, pre-gap and/or installation tolerance.
  • In case that the anticipated angle of deflection is more than the design and/or installation tolerance.

RECOMMENDED QUANTITY FOR CONTROL RODS

DN(mm) 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600
Quantity (PN16) N/A 2 2 2 2 2 2 2 2 2 3 3 4 4 4 4 4
Quantity (PN25) N/A 2 2 2 2 2 2 2 2 3 4 4 – – – – –

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Submit An Inquiry

As a direct manufacturer, we have dedicated measurement, installation, and production teams to ensure a perfect fit every time.

Our representatives will contact you shortly to confirm your appointment date and time. Thank you for your interest!