DoorKing 9550 Maximum Security Slide Gate Operator

The DoorKing 9550 is a Class III and Class IV maximum security slide gate operator rated for gates up to 15,000 lbs (6,803 kg) and 160 ft (48 m) in length. Powered by a 5 HP motor through a 30:1 continuous oil bath gearbox, the 9550 is the entry-level model in the DoorKing 9500 maximum security series and is specified for government facilities, military installations, airports, seaports, correctional facilities, border access points, and high-security industrial perimeters where Class III or IV operation is required and gate weight falls within its rated capacity. Class III and IV are restricted-access commercial and industrial classifications. This operator is not for residential or general public-serving applications.

5 HP / 30:1 Fail-Secure Gearbox

The 9550 uses a 5 HP motor with a 30:1 gearbox in a fail-secure configuration. When power is removed, the gate cannot be moved without a mechanical disconnect — there is no back-driving, no coasting, no manual override without the proper procedure. For government and restricted-access sites where perimeter integrity must be maintained regardless of power status, this is the correct security posture. Gate weight capacity is 15,000 lbs on three-phase power and 9,000 lbs on single-phase power — power configuration must be confirmed against gate weight during specification.

#100 Roller Chain Drive

The 9550 drives the gate with #100 high-tensile steel roller chain, providing a direct mechanical linkage that will not slip and is unaffected by ice, water, dirt, oil, or grease. The unit ships with 20 ft of #100 roller chain and chain brackets. A chain tray kit (p/n 2601-270) is available in 10-ft sections and is recommended for gates exceeding 20 ft.

Electrical and Control

The 9550 accepts 208, 230, or 460 VAC single or three-phase input. Adjustable solid-state variable speed control delivers slow-start and slow-stop operation at 1–2 ft/sec. Anti-tailgating, adjustable partial open, and selectable stop/reverse loop functions are standard. Limit switches are direct-driven internally and cannot be tampered with from outside the housing. Two 115 VAC outlets and two plug-in loop detector ports (DKS detectors only) are integrated. Built-in diagnostics check for specific fault conditions at the operator.

Gate Tracker Reporting

The 9550 includes Gate Tracker output compatible with DKS 1833, 1835, 1837, and 1838 access control systems (2358 expansion board required) for centralized operator data logging across multi-gate facilities.

The 9550 is ETL Listed by Intertek, Made in the USA, and backed by a 5-year limited warranty. Operating range: 10°F to 140°F (-12°C to 62°C).

For pricing or project specifications: 713-330-3333 or Jay@GateOperator.net.

9550 vs 9555 — Which Model?

Both the 9550 and 9555 run a 5 HP motor rated for gates up to 15,000 lbs and 160 ft. The gearbox determines the decision. The 9550 uses a 30:1 gearbox in a fail-secure configuration — the gate cannot be moved without a mechanical disconnect when power is removed, making it the right choice when maintaining a closed perimeter under any power condition is the requirement. The 9555 uses a 10:1 gearbox with an included magnetic brake and can be back-driven with mechanical assistance after power loss, making it correct when manual gate operation during an outage is operationally necessary.