Overview of Rectangular Bellows

ZHW rectangular bellows have been designed to control vibration, reduce noise, relieve stress, prevent system shock and compensate for misalignment and movement. Use of braided metal connectors for applications such as pumps, compressors, and other mechanical equipment will enhance the overall operation of the system.

ZHW rectangular bellows are used in lots of applications, where it concerns safety, health, environment, durability and lifetime. Bellows are made from stainless steel strip which is first welded to a thin walled tube and formed to a bellow afterwards.

Bellows are normally unbraided and capable to absorb axial, lateral and angular movements while being under low or higher pressures and temperatures. Due to the construction techniques involved the bellows are relative light compared to equivalent non-metallic bellow alternatives in the market.

Description

ZHW’s “RBFF” series bellows system provides the most economical installation. Rectangular bellows is the base member of ZHW metal expansion bellows family, consisting of a bellows element and end fittings.

Absorbs and isolates troublesome pipeline vibrations

  • Smooths out force-pump system pulsations
  • Tranquillize jittering compressor pipelines
  • Also absorbs pipeline expansion, compensates for misalignment, eliminates piping stresses.
  • Ends costly failure and downtime caused by pipeline vibration transmissions
  • Customized to solve your vibration problem

For more information about the features and benefits of the ZHW Rectangular Bellows Series RBFF21, Download our brochure.

For up-to-date pricing and availability information. Contact ZHW today.

Specification of rectangular bellows series RBFF21
Diameter
DN		 Total length Bellows specification Axial movement Weight
Eff length OD Eff Area Spring rate Extension Compression
mm mm Lb(mm) ΦD(mm) cm2 kg/mm ΔXe(mm) ΔXc(mm) kg/pc
32 200 88 59.2 20.3 19.7 5 30 4.9
40 250 96 65.7 25.4 20.3 5 30 5.4
50 300 120 81.2 38.7 25.0 5 35 6.5
65 300 120 97.2 58.4 30.8 5 35 8.8
80 300 120 113.7 79.6 26.0 10 40 11.3
100 300 132 139.7 126.1 29.6 10 45 14.6
125 300 144 165.7 183.1 32.6 10 46 19.9
150 350 165 196.7 255.9 37.5 10 50 27.6
200 350 180 247.7 420.9 43.8 10 55 37.6
250 350 200 305.7 643.6 57.0 10 60 55.7
300 350 200 355.5 887.1 66.2 10 60 68.1
350 400 200 399.0 1119.7 61.8 10 65 90.7
400 400 210 458.7 1464.9 93.6 10 65 135.3
450 400 210 500.0 1720.2 90.1 10 70 164.7
500 400 210 551.0 2115.6 99.3 10 70 192.2
550 400 210 602.0 2551.8 109.1 10 70 223.1
600 400 210 653.0 3028.8 119.0 10 70 244.4
Note: Standard ZHW Type EBF521 expansion bellows shown in the table are considered Standards and if any different technical requirements please contact ZhongHaiWei.
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