Description
KN20551-G – HAND CONTROL VALVE
PART NUMBER(S):
Fleet Products: KN20551-G | OE: KN20551 | Automann: FSKN20551X
DESCRIPTION:
Model: KN20551 Hand Control Valve
Vehicles: Suitable for tractor-trailer combinations with separate trailer service brake actuation
• Actuation Type: Manual, lever-actuated graduated air pressure control
• Mounting: Typically in-column or dash; bracket and handle sold separately
• Supply Port: 1/4" NPT
• Delivery Port: 1/4" NPT
• Exhaust Port: 1/4" NPT
• Max Operating Pressure: 150 PSI
• Handle: Marked “NOT FOR PARKING” to prevent misuse
• Compliance: Engineered for controlled trailer service brake actuation only
Applications:
Used in air brake systems for independent control of trailer service brakes, particularly in applications requiring fine graduated control. This valve is not designed for spring brake (parking) application and is marked accordingly. Ideal for vehicles requiring trailer brake modulation during maneuvering or loading.
CROSS-REFERENCE(S):
KN20551, FSKN20551X
A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Do not use for parking brake actuation – handle is labeled “NOT FOR PARKING”
✔ Torque mounting screws to 30–60 in-lbs (3.4–6.8 Nm)
✔ Torque air line fittings to 10 ft-lbs (13.6 Nm)
✔ Confirm all 1/4" NPT ports are correctly connected per air schematic
✔ Valve must be securely mounted to prevent vibration-related failure
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Warranty Information
