3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
I & M 33 Tag 63SCV
Installation & Maintenance Instructions for
Mark 33 Electric Motor Control Valve
Warning: Jordan Valve Electric Motor Control Valves must only be used, installed, and repaired in accordance with these
Installation & Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event of
leakage or other malfunction, call a qualified service person; continued operation may cause system failure or a general
hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassembling a valve, be
sure to release all spring tension.
Please read these instructions carefully!
Your Jordan Valve product will provide you with long, trouble-
free service if it is correctly installed and maintained. Spend-
ing a few minutes now reading these instructions can save
hours of trouble and downtime later. When making repairs,
use only genuine Jordan Valve parts, available for immediate
shipment from the factory.
Ideal Installation Schematic
Installation
1. To protect the valve from grit, scale, thread chips and
other foreign matter, all pipe lines and piping should be
blown out and thoroughly cleaned before the valve is
installed.
2. Shutoff valves, pressure gauges and bypass piping
should be installed as indicated in the diagram to provide
easier adjustment, operation, and testing.
3. In preparing threaded pipe connections, care should be
exercised to prevent pipe sealing compound from getting
into the pipe lines. Pipe sealing compound should be
used sparingly, leaving the two lead threads clean.
4. A line strainer should be installed on the inlet side of
the regulator to protect it from grit, scale and other
foreign matter. A .033 perforated screen is usually
suitable. Line strainers are available for immediate
shipment from Jordan Valve.
5. Install the valve in the highest horizontal line of piping to
provide drainage for inlet and outlet piping, to prevent
water hammer and to obtain faster response.
6. The flow arrow on the regulator body must be pointed in
the direction of flow. The valve may be installed in any
direction, but damage to the seating surfaces may occur if
installed in a vertical line with the flow upwards.
7. To minimize condensation in hot vapor lines and to
protect the motor from excessive heat, piping near the
valve should be insulated.
8. If possible, install a relief valve downstream from the
regulator. Set at 15 psi above the control point of the
valve.
9. Expand the outlet piping at least one pipe size if the
downstream pressure is 25% of the inlet pressure or less.
A standard tapered expander connected to the outlet of
the valve is recommended.
10. Where surges are severe, a piping accumulator is
recommended.
11. For best control, 3’ straight sections of pipe should be
installed on either side of the valve.
Wiring
Caution: Disconnect electrical power supply
before wiring motor into circuit to avoid electrical
shock or possible damage to equipment. Always
disconnect power supply before attempting any
wiring changes.
See the Motor Manufacturer’s literature, supplied with the
valve, for wiring connections and instructions.
Start-Up
1. Be sure that the action of the control valve and of the
controller are such as to give the desired results.
2. With the inlet, outlet, and bypass shutoff valves closed,
and no pressure in the downstream line, fully open the
outlet shutoff valve. Slowly open the inlet valve just
enough to start flow through the control valve. Increase
flow gradually by slowly opening the inlet shutoff valve.
Do not fully open the inlet valve until you are sure that the
controller and control valve have control of the system.
Usually the handwheel on the inlet valve will turn freely
when this point is reached.
3. To shut off the line fluid, close the inlet shutoff valve first,
then the outlet shutoff valve.
(5 pages)
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