§ 14-16-63. Hydraulic machines.

A.

Gas release. Cylinders of hydraulic elevator machines shall be provided with a means for releasing air or other gas.

B.

Relief valve. Each positive-acting pump connected to the pressure tank of hydraulic elevators shall be equipped with a relief valve (or valves) so installed that it cannot be shut off. The relief valve shall be of sufficient size and so located as to pass the full capacity of the pump at full speed without exceeding the safe working pressure of the pump or tank.

C.

Automatic bypass. Positive-acting elevator pumps, unless equipped with pressure regulators which control the motive power, shall be equipped with automatic by-passes.

D.

Hydrostatic test. Pressure tanks, piping, pumps, valves, cylinders, pistons and packings of a hydraulic elevator shall be maintained to withstand successfully a hydrostatic test wherein the maximum testing pressure is 50 percent over the normal working pressure. Pressure tanks must have adequate openings for internal inspection purposes.

E.

Water-gauge glass. Each pressure tank shall be equipped with a water-gauge glass, having brass valves and fittings attached directly to the tank and so located as to show the level of the water when the tank is more than half filled.

F.

Pressure gauge. Each pressure tank shall be provided with a correctly indicating pressure gauge having a capacity not less than 1½ times the normal working pressure allowed in the tank.

G.

Inspection gauge. Each pressure tank shall be provided with a one-quarter inch pipe-size valved connection for attaching an inspector's gauge while the tank is in operation.

H.

Tank guard. Discharge tanks shall be adequately covered or screened.

I.

Packing. All packings used in connection with a hydraulic elevator shall be maintained sufficiently tight to prevent any uncontrolled movement of the elevator.

J.

Compliance with rules. Hydraulic elevators operated from pressure tanks where the fluid pressure is obtained by directly admitting steam, air or other gas to the tank, shall comply with all the rules covering hydraulic elevators.

K.

Water level. The water level in a pressure tank shall be maintained at about two-thirds of the capacity of the tank.

(Code 1967, § 49-113; Code 1985, § 46-133)