Popular Sealco Air Valves for Trailers
Sealco makes several popular trailer valves. Go to the bottom of this page to see the Sealco valves that are currently in stock. Sealco's 110500, 110700, and 110800 spring brake valves shown below offer a choice in the quickness with which your parking brakes are released. A valve with "spring brake priority" will allow a vehicle to be put in motion sooner than a valve with "service reservoir priority".
Sealco's 110500 valve with spring brake priority.
110700 Spring Brake Valve (service reservoir priority)
Sealco 110800 valve (spring brake priority)
Single Trailer Axle
with ABS valve for Service Brakes
Since 3/1/1998 New trailers have been required to use Anti-lock Brakes (ABS). At right is a single axle system with the above Sealco spring brake valves, a supply line filter, and control line filter.
Single Axle Trailer Brake Valves with WABCO Enhanced Easy Stop ABS relay valve and Sealco spring brake valve
Tandem Axle,
Twin Tanks
Without protected reservoir
Protected reservoir systems are common on trailers built from 1975 to 1992. After 1992 they were no longer required by regulations. Sealco's spring brake valves 110500, 110700, and 110800 were designed to operate with single tanks in accordance with the most recent regulations but they also support twin tanks as shown at the right in a configuration with PN 110415X 4 port service relay valve.
Piping Diagram for Tandem Axle, Twin Tank Trailer Air Brake System
Protected Reservoir
System
Tandem Axle
Twin Tank
Example at right shows (1) Sealco 110171X Spring Brake valve (service brake priority) with (3) Sealco 110415X 4 port service relay valve and (4) 140270 pressure protection valve
Piping Diagram for Tandem Axle, Twin Tank, Protected Reservoir Trailer Air Brake System
You can find out more about "spring brake priority", protected reservoirs, how to replace a Bendix SR-5 valve with a Sealco 110800, and other info about trailer spring brake valves by clicking on the link to Sealco's web page "Spring Brake technical data" at the right.
Bendix & Haldex alternatives to these Sealco valves can be found here:
110171 Spring Brake Valve
110415 Trailer Relay valve
110205 Relay emergency valve (pre-121)
Sealco Air Valves Currently in Stock at Plaza
valvegrabber
| Function |
PN |
Description |
|
New/reman |
| Trailer |
Spring brake valves |
| 110170X |
for protected reservoir system |
reman |
| 110171X |
for protected reservoir system |
reman |
| 110191X |
for protected reservoir system |
reman |
| 110500 |
spring brake priority, anti compounding |
new |
| 110515 |
repair kit for Sealco pn 110800 |
new |
| 110700 |
service brake priority, anti compounding |
new |
| 110800 |
spring brake priority, replacement for Bendix SR-5 |
new |
| Trailer |
Relay valves pre121 |
| 110205X |
4 port, pre-121 (no springbrake), ratio relay emergency valve |
reman |
| 110475 |
4 port, pre-121 relay emergency valve for spring brakes |
new |
| A1000S |
4 pt, pre-121 (no springbrake), relay emerg. valve 1.5 crack press. |
new |
| 110118 |
repair kit for pn 110139X |
new |
| 110139X |
4 port Ratio service relay valve 4.5 crack pressure |
reman |
| 110197X |
2 port service relay valve 4.0 crack pressure |
reman |
| 110227 |
kit for 2 port service relay valves 110197,8 |
new |
| 110143 |
repair kit for relay emergency valve 110338 |
new |
| 110365 |
2 port service relay valve 1.5 crack pressure |
new |
| 110376 |
relay emerg. valve for single axle converter dollies, noncharging |
new |
| 110380X |
4 port service relay valve 1.5 crack pressure |
reman |
| 110415X |
4 port service relay valve 4.0 crack pressure |
reman |
| 9125 |
3 port service relay valve 5.5 crack pressure |
new |
| 91255 |
Plug for 9125 valve |
| 110300 |
tailgate control valve lever style |
new |
| 140270 |
Pressure protection valve |
new |
| 140280 |
pressure protection valve closing 80 psi |
new |
| 21600 |
lever control valve |
new |
| 3700 |
tractor protection valve |
new |
| 3800 |
Inline Quick Release And Holding Valve |
new |
