BENDIX BW2627 User Manual

Genuine Bendix Valves

Tests show that some knock-off valves may be potentially hazardous or inferior to genuine Bendix parts

Comprehensive testing by Bendix Commercial Vehicle Systems continues to show that some knock-off brake valves not only fall short of Bendix speciﬁ cations, but can lead to safety hazards through inferior production quality. The following is an example of a recent test on a knock-off valve product purchased off the shelf compared to the Bendix

E-6™ brake valve:

Test Showing

Non-Genuine

Knock-off

Valve

Leakage

Cracks in

Housing Result in

System Air Leakage

After thousands of hours of testing the knock-off and the Bendix brake valve

in identical conditions, the results are in.

Test Category The Results The Potential Impact To Your Vehicle

Too high of a pressure differential can cause the primary circuit to

Safety

Feel

Durability

Machined Surface

Finish

Corrosion

Protection

O-Ring Quality

Pressure differential at double

the allowable OEM spec

Inconsistent and poor

quality graduating springs

Valve bodies cracked before the

test was complete

Machined surface ﬁ nish did not meet OEM

speciﬁ cations when the tested product was

new out of the box

No corrosion protection material was found

on outer castings. Material used

on internal components failed 50% sooner

than OEM protective coatings

7 out of 8 O-rings in the valve were 50%

stiffer than Bendix speciﬁ cations allow

open long before the secondary circuit, causing longer stopping distances, and accelerated wear of other critical brake components (friction material, drums, seals).

Inconsistent spring tension means the driver loses the ability to lightly apply the brakes. The valve acts more like an instant on-off switch instead of providing the expected gradual braking capability.

Weak or thin body castings not only cause internal component misalignment, but also make the valve more susceptible to cracking or may even result in a complete valve rupture.

Signiﬁ cantly reduced component life, decreased durability and loss of valve function. Rough surfaces will cause O-rings to wear and may cause premature air leaks.

Untreated and uncoated exterior and interior surfaces mean premature corrosion along with sharply decreased durability, greater susceptibility to cracking and possible brake valve failure.

Hard or stiff O-rings may lead to premature wear, and may result in air leaks, shorter component life, and substantially poorer performance.

Your air brake system is not the place to cut corners. Inferior design or materials can, and frequently do, affect the performance, durability and long-term reliability of your braking system. Protect your vehicle by using only genuine Bendix

parts. Talk to your Bendix Account Manager, call 1-800-AIR-BRAKE, (1- 800-247-2725) or visit www.bendix.com today.

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