Vulcan-Hart VL3GSS, VL3GMS, VL2GMS, VL3GAS, VL2GAS, VL2GSS, VL3GPS, VL2GPS Steam Gate Valves

VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS

STEAM GATE VALVE(S)

On all models, each cooking compartment has its own mechanical steam gate valve that supplies steam to the cooking compartment when the steam control arm handle is pulled forward. The Prevent models use a solenoid valve to exhaust steam from the compartment whereas the Automatic, Standard and Manual models use an additional steam gate valve to exhaust steam when the steam control arm handle is returned to the rear. These gate valves are a standard type and can be disassembled for cleaning and gasket replacement.

If steam leaks are noticed around the packing nut and stem during cooking, tighten the packing nut until the steam leak ceases. Release steam control arm to ensure its automatic return. If arm does not return freely or steam is still leaking, then further inspection or adjustments are necessary. Turn the timer and compartment power switch OFF and blowdown the boiler. Remove the control arm bracket and packing nut from the stem and clean out the old string packing. The valve stems may then be re-packed using a string packing suitable for steam service.

Replace the packing nut and control arm bracket. Tighten the packing nut finger tight plus ½ turn and check for proper operation. If steam continues to leak, tighten the packing nut in additional ½ turn increments until it stops and re-check operation of the steam control arm.

NOTE: Do not over tighten packing glands, the linkage system must be free enough for the spring to return the steam control arm to the fully closed position.

For other service to these valves, remove the stem assembly and cap at the top of the valve. Check the valve linkage for loose or binding parts.

The steam gate valve linkage for these controls are simple and there function easily seen. The inlet and exhaust steam gate valves must be positioned so the inlet valve is open and the exhaust valve closed when the steam control arm handle is pulled forward and reverses when the control arm is released.

NOTE: In the event of an electrical component or a power failure, the steam control arm can be operated manually on automatic models.

Page 37 of 88