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World American WAKN30400, Relay Emergency Valve 3 PSI Fits Heavy-Duty Air Brake Systems, Replaces Haldex KN30400, Meritor R955KN30400, Bendix KN30300XM1DRMAN Charging Style, 1/4 Control & Emergency in Saudi Arabia World American WAKN30400, Relay Emergency Valve 3 PSI Fits Heavy-Duty Air Brake Systems, Replaces Haldex KN30400, Meritor R955KN30400, Bendix KN30300XM1DRMAN Charging Style, 1/4 Control & Emergency in Saudi Arabia World American WAKN30400, Relay Emergency Valve 3 PSI Fits Heavy-Duty Air Brake Systems, Replaces Haldex KN30400, Meritor R955KN30400, Bendix KN30300XM1DRMAN Charging Style, 1/4 Control & Emergency in Saudi Arabia World American WAKN30400, Relay Emergency Valve 3 PSI Fits Heavy-Duty Air Brake Systems, Replaces Haldex KN30400, Meritor R955KN30400, Bendix KN30300XM1DRMAN Charging Style, 1/4 Control & Emergency in Saudi Arabia World American WAKN30400, Relay Emergency Valve 3 PSI Fits Heavy-Duty Air Brake Systems, Replaces Haldex KN30400, Meritor R955KN30400, Bendix KN30300XM1DRMAN Charging Style, 1/4 Control & Emergency in Saudi Arabia World American WAKN30400, Relay Emergency Valve 3 PSI Fits Heavy-Duty Air Brake Systems, Replaces Haldex KN30400, Meritor R955KN30400, Bendix KN30300XM1DRMAN Charging Style, 1/4 Control & Emergency in Saudi Arabia

World American WAKN30400, Relay Emergency Valve 3 PSI Fits Heavy-Duty Air Brake Systems, Replaces Haldex KN30400, Meritor R955KN30400, Bendix KN30300XM1DRMAN Charging Style, 1/4 Control & Emergency

SAR 173
SAR 246

Weight
454 g
1 +

Special Features

  • Heavy-duty air brake relay emergency valve with 3 PSI cracking pressure and charging style design, suitable for commercial truck and trailer applications.
  • Ports: 1/4" control, 4x 1/4" delivery (0.375" dia), 1/4" emergency, 3/4" reservoir with nipple, 0.25" service, 1/4" supply/emergency, NPT threading.
  • Delivers reliable performance in emergency air brake activation; reservoir port provides added volume for safe operation.
  • Meets OE specifications with consistent delivery and response pressures (4.5 ± 1 PSI crack pressure); built for long service life.
  • Replaces OE & aftermarket parts: Haldex, Meritor, Bendix, Freightliner, Tectran, Automann, Euclid, Velvac, Wagner, and more (see full list below).

Description

Short Summary:
The World American SSA KN30400 Relay Emergency Valve is designed for heavy-duty air brake systems with a 3 PSI cracking pressure and charging style configuration. Engineered to handle critical emergency braking functions, it ensures reliable control and delivery for commercial trucks and trailers.
Valve Type: Relay Emergency Valve (Charging Style)
Cracking Pressure: 3 PSI (±1 PSI)
Control Port: 1/4 Inch NPT
Delivery Ports: Four 1/4" ports (0.375" diameter)
Emergency Port: 0.25 Inch
Reservoir Port: 0.75 Inch with Nipple
Thread Type: NPT (All Ports)
Prop 65: WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
Universal fit for commercial truck and trailer air brake systems using 3 PSI emergency relay valves.
Velvac: 034067
Tectran: 14479, TV30400
Automann: 170.KN30400
OE Aftermarket: 401227, F224701
Mack: 5396-KN30400
Bepco: A-71890, A-99036
Wagner: A99036
Dayton Parts: AVKN30400
Euclid: E-MDKN30400N, E-MDKN30400X
Haldex: FSKN30400, HAL-KN30400, KN-30300, KN-30400, KN30300X, KN30400CX, KN30400NP, KN30400RX, MIRKN30400, N4301AA, N4301CB
Freightliner: HDX KN30300, HDX KN30400, HDXKN30400
Bendix: KN30300XM1DRMAN
BWP: M-30400
Haldex (cont.): MDKN30300
Genuine Newstar: MIR-KN-30400, S-9322, S9322
Torque: TRKN30400
Meritor: R955KN30400, R955KN30400N, R955KN30400X
Navistar: ZZKN30400
Globetech Manufacturing: GTA30400
World American products are engineered to meet or exceed OEM standards for fit, function, and durability. Backed by a limited warranty and trusted by professional technicians across the industry, World American delivers lasting performance you can count on.

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