Bendix R12P Relay Valve

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Stock Code:
170417
Hamilton
In Stock
Christchurch
Out of Stock
Price:
$275.00 Excl. GST

The R-12P™ pilot relay valve is designed to speed up control signal application and release on long non-towing trailers, towing trailers, dollies, and long wheelbase tractors. It does this without adversely affecting the control signal. The R-12P™ valve replaces the current R-8P™ valve. 

Unlike a standard relay valve used as a “booster,” which typically has a 2-4 psi differential between control and delivery, the R-12P™ valve has zero differential. It “speeds” up control line signal application and release in a train of vehicles, and it delivers the same air pressure that it receives. This provides a uniform brake signal to all trailer and dolly brakes, even during light applications. 

The unique R-12P™ valve feature is that it uses a supply air pressure load to quicken the valve’s response time. By balancing the pressure signal to all trailer and dolly brakes, the R-12P™ valve aids in achieving overall vehicle brake pressure balance, timing balance, and stability. 

It also substantially improves brake lining wear balance on combination vehicles by making even the most distant brake contribute its share of braking effort.

The R-12P™ valve uses the R-12™ valve family lower body and standard Bendix mounting brackets. It can also be reservoir-mounted. 

The body and cover are die-cast aluminum, and the valve’s
weight is approximately 2.3 lbs. Porting is as follows:

 

CROSS REFERENCES:
109264, 065476, 109001, 109002, 109264, 109424, 109446, 65476.

Body Configuration:  2 SUP / 4 DEL (2H + 2V)
Supply Port 1: 1/2-14 NPT 
Supply Port 2: 1/2-14 NPT 
Internal Supply Passage to Cover:  Yes
Control / Secondary Service Port:  1/4-18 NPT 
Control Port Orientation (CW from Front Face):  90° 
Delivery Port 1:  3/8-18 NPT 
Delivery Port 2: 3/8-18 NPT 
Delivery Port 3: 3/8-18 NPT 
Delivery Port 4: 3/8-18 NPT 
Exhaust Port: Dust Shield
Crack Pressure: 0.0 PSI
TMC Washer: RD000
Maximum Operating Temp: 93 °C
Minimum Operating Temp: -40 °C

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