Features

SP systems are pre-assembled and pre-wired units which provide steady water pressure in buildings having varying water demand and variable street pressure.

The system includes close-coupled pumps, control valves, a temperature purge valve, copper suction and discharge headers, header pressure gauges, lag pump pressure control, pump isolation valves, a steel base, and a control panel (the panel comprises a fusible disconnect switch and magnetic starter for each pump motor, selector switches, pilot lights, an automatic alternator, transformers, holding circuits and time delay relays). Operation of the systems is as follows:

Simplex System: The pump operates continuously to satisfy the water demand.

Duplex System: The lead pump operates continuously to satisfy the water demand. When required, the lag pump is automatically started to run in parallel with the lead pump until the water demand drops again. The lag pump will then shut down. Lead and lag pumps are automatically alternated.

Triplex Type A System: The first pump operates continuously to satisfy the water demand. When required, the second pump and then the third pump are automatically started to run in parallel with the first pump until the water demand drops again. The second and third pumps will then shut down. Pump sequence is automatically alternated.

Triplex Type B System: A small capacity jockey pump operates continuously to satisfy the water demand. When required, the first main pump and then the second main pump are automatically started to run in parallel with the jockey pump until the water demand drops again. The main pumps will then shut down. Sequence of the main pumps is manually alternated.

Highlights

Automatic maintenance of building water pressure
Factory assembled and wired
Simplex, duplex and triplex systems available
Cushion-Stop tanks available for low demand periods

SP Control Valves

Federal SP control valves perform the following functions:

(1) Automatically reduce a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate.

(2) Act as a check valve by preventing return flow when pressure reverses.

(3) Provide darnpening action to eliminate pulsation caused by low flow rates.

The valves are of cast iron construction with bronze trim, and have an adjustable pressure range of 30-300 psig. 125# rated valves are standard but 250# rated valves are available if required. Maximum temperature rating is 180°F. The valve pressure setting is easily adjusted in the field with ordinary working tools.

MODIFICATIONS AND ACCESSORIES:

Alarm bell, silencer button and indicating light, plus cut-out circuit for high and low suction pressure and/or high and low system pressure.

Flexible connectors for the ends of the headers and/or vibration rails for installation under the system base.
Modified control panels and motor enclosures.
Cushion-Stop tanks to shut down the lead pump during periods of low water demand.

SP Cushion-stop Tanks

SP systems can be furnished with a Cushion-Stop tank plus the circuitry required to shut off the lead pump. The tank is mounted on the same base as the pumps, and is furnished with all required piping, valves and controls. The tanks have a sealed inert flexible water chamber to separate the water and the air, and, therefore, no periodic recharging is necessary.

SP Pump & Motor Controls

SP Pump & Motor Controls Type SP water pressure systems are built with Federal Type CC, CG, and CK close-coupled, bronze-fitted, end suction, centrifugal pumps. Pumps are back pull-out style with center-line discharge, and are fitted with leakless mechanical shaft seals. They are driven by standard JM type close-coupled pump motors.

SP Pump & Motor Units

Type SP water pressure systems are built with Federal Type CC, CG and CK close-coupled, bronze-fitted, end suction, centrifugal pumps. Pumps are back pull-out style with center-line discharge, and are fitted with leakless mechanical shaft seals. They are driven by standard JM type close-coupled pump motors.