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Threaded Union Rubber Joint

    Place of Origin: China

Product Description

Threaded Union Rubber Joint
Threaded union rubber joints, also known as union twin sphere rubber joints, are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise/vibration, compensate for misalignment/offset and to protect rotating mechanical equipment against start-up surge forces.

Features and Benefits
·Versatile hand-built construction. Made in China
·Absorbs directional movement
·Absorbs vibration, noise and shock
·Compensates for misalignment
·More compensation capability
·Embedded steel reinforce ring enable the pressure resistance
·Solid galvanized steel union ends with BSPT female threads
·Less weight, easy to install
·High tensile aircraft cable is embedded in the raised face rubber ends to prevent pull out and avoids the sharp cutting edge of solid steel rings
·No gaskets required


Nominal diameter: DN15mm to DN80mm
Maximum working pressure: 2.5 Mpa
Vacuum KPa(mmHg) 101.3(760)
Operating temperature: -20℃-100℃
Corrosion resistance Good
Applicable media Sea water, drinking water, slurry, industrial sewage.

Components Materials Functions
Rubber Bellows EPDM/NR/NBR Body
Ring Flange Carbon Steel/SS Fasten
Steel Pressure Ring Mild Steel Reinforce
Nylon Tire Cord Nylon Reinforce

Components/Materials/Functions Data Sheet:

SIZE LENGTH MAX VACUUM Movement Capability(mm) Prox.
I.D F/F Pressure Rating Comp. Ext. Lateral Angular Torsional Weight
(mm) (mm) (bar) (mm Hg) (mm) (mm) (mm) (degree) (degree) (kg)
15 200 20 760 22 6 22 45° 5 0.6
20 200 20 760 22 6 22 45° 4.8 0.8
25 200 20 760 22 6 22 45° 4.5 1.2
32 200 20 760 22 6 22 45° 4 1.4
40 200 20 700 22 6 22 45° 3.8 1.5
50 200 20 700 22 6 22 45° 3.2 2.6
65 265 20 700 24 10 24 45° 3 4.0
80 280 20 700 24 10 24 45° 3 5.5

1. Pressure/Vacuum rating is based on neutral installed length(F/F).
3. Pressure rating is based on 30℃ operating temperature. The pressure rating is reduced at higher temperatures.
4. Weights in the above table are joints with BSPT Malleadble Cast Iron threaded connections.
5. Movements shown in the above table are non-concurrent.
6. Rated pressure in the above table is the maximum "working pressure". Test pressure is 1.5 times "working pressure", Burst pressure is 4 times " work pressure".
7. Normally, the connections are based on BSPT, NPT or other standards are available upon request.

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Product Categories : Rubber Joint

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