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7.7.2. INSTALLATION OF PUMPS WITH RING STANDS
The ring stand design allows for a free standing, simple economical installation or to be transportable from one
installation to another.
It is intended to operate completely or partially submerged in the pumping liquid.
Install the ring stand to the underside of the volute with the supplied fasteners provided. Apply thread locking
compound and tighten the bolts using the torque table indicated in the table. Do not over tighten! Install suitable
lifting devise of an adequate length to ensure proper lowering and raising capabilities. Lower the pump into the
area where it is required. Properly position power cable and chain so they stay above pump and cannot enter the
pump suction.
7.7.3. INSTALLATION OF PUMPS FOR DRY PIT APPLICATIONS
Foundation and Piping Requirements:
General
The following recommendations are basic guidelines which are intended to outline basic requirements in the
design of the dry pit station. It is essential that a licensed professional engineer be retained by the owner to
design the station and all support structures.
Foundations
Foundations may consist of any structure heavy enough to provide permanent rigid support for the pump and inlet
elbow stand. Concrete foundations built up from the solid ground are the most commonly used. The concrete floor
shall be level. The space required by the inlet stand and the location of the foundation anchor bolts are shown on
the outline dimension drawing. Foundation bolts are to be embedded in the concrete.
Suction Piping
Suction piping should be at least as large as the pump inlet elbow suction. If reducers are utilized they should be
of the conical type. If the liquid source level is below the volute horizontal centerline, the reducer must be
eccentric and installed with the level side up. If the liquid level is above the pump volute horizontal centerline,
either eccentric or concentric reducers may be used. Suction piping should be run as straight as possible. All pipe
flange joints should be gasketed to prevent air from entering the pipe. High points that may collect vapor are to be
avoided. Isolation valves such as gate valves can be installed in order to facilitate the removal of the pump for
maintenance. Any valve installed in the suction line should be installed with the stems horizontal.
Discharge Piping
A check valve and isolation valve shall be installed in the discharge line. The check valve should be installed
between the pump discharge flange and the isolation valve. If pipe increasers are used on the discharge line, they
should be placed between the check valve and the pump.
The inlet elbow stand allows the pump to be installed in a stationary position in a dry pit. Place the inlet stand in
position and tighten the anchor nuts.
Lower the pump on to the top flange of the inlet stand. DO NOT ALLOW SLACK ON THE LIFTING CABLE
UNTIL THE PUMP IS BOLTED DOWN. Make sure the flange bolt holes align with the mounting holes on the
underside of the volute. Secure the pump to the mounting flange with the fasteners that are specified in the
accessory fastener selection table below.
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