| |
Water Pressure Systems
Bulletin 271C
 |
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 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, a manual transfer switch, 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 manually 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 manually 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
shutdown. Sequence of the main pumps is manually alternated.
MODIFICATIONS AND ACCESSORIES
• 24-hour automatic alternation of lead pump.
• 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 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 dampening 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. |
|
|
SP PUMP AND 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. |
|
|
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.
The standard Cushion-Stop tank has an 80 gallon nominal capacity and
is rated for 150 psi maximum working pressure. Tanks with 125#, 175# and
250# ratings, tanks larger than the standard size and tanks with ASME
labels are also available, if specified. The Cushion-Stop tank provides
a cushion against leakage loss in the building and storage capacity for
small water demand periods. They are, therefore, recommended for
schools, office buildings, etc., with very low night-time and weekend
water usage. |
DETERMINING THE SP SYSTEM GPM RATING:
The total GPM rating of the SP system can be determined by using the fixture
flow unit and conversion tables shown below.
|
Type Fixture |
Public* |
Semi Public*
|
Private* |
|
Water
Closet:
Flush valve
Flush tank |
-
10
5 |
-
8
4 |
-
6
3 |
|
Urinal:
Flush valve,
pedestal
Flush valve,
stall or wall
Flush tank |
-
10
5
3 |
-
8
4
2 |
-
-
3
- |
|
Bath
Tub |
4 |
3 |
2 |
|
Shower |
4 |
3 |
2 |
|
Lavatory
(sink) |
2 |
1 |
1 |
|
Bathroom
Group (Water Closet plus Lavatory plus Tub Shower):
With flush valve
With flush tank |
-
-
- |
-
-
- |
-
8
6 |
|
Sink:
Kitchen
General
Service
Lavatory
Bar |
-
4
3
3
-
3 |
-
3
2
2
2
2 |
-
2
-
2
-
- |
|
Dishwasher:
General
Pot and pan
Garbage
Disposal, sink
Washing Machine
Laundry Tub
Drinking
Fountain
Ice Cube Machine
Steamtables
Hose connection,
3/4"
Fire Sprinkler |
-
6
3
3
-
-
2
1
1
-
10 |
-
4
3
3
6
3
1
1
1
4
10 |
-
2
-
2
4
3
1
1
-
4
- |
*PUBLIC - Hospitals, hotels, factories, department stores, theatres,
restaurants, schools, etc.
*SEMI-PUBLIC - Office buildings, clubs, motels, stores, etc.
*PRIVATE - Apartment buildings, homes, etc.
Note: Fixture Flow Unit Tables do not include air-conditioning,
swimming pool, boiler make-up water requirements, etc. Actual GPM requirements
for these demand factors should be added.
|
TOTAL FIXTURE FLOW UNITS
|
SYSTEM GPM
|
TOTAL FIXTURE FLOW
UNITS
|
SYSTEM GPM
|
|
100 |
40 |
2000 |
210 |
|
200 |
70 |
2500 |
240 |
|
300 |
80 |
3000 |
270 |
|
400 |
90 |
3500 |
320 |
|
500 |
100 |
4000 |
350 |
|
750 |
115 |
5000 |
410 |
|
1000 |
120 |
6000 |
450 |
|
1250 |
150 |
7000 |
520 |
|
1500 |
170 |
8000 |
590 |
|
1750 |
190 |
9000 |
620 |
TO DETERMINE SP PUMP GPM RATING:
SIMPLEX SYSTEM: The pump should be rated for the full system GPM.
DUPLEX SYSTEM: Each of the two pumps should be rated for 70% of the system GPM.
TRIPLEX TYPE A SYSTEM: Each of the three pumps should be rated for 45% of the
system GPM.
TRIPLEX TYPE B SYSTEM: Each of the two main pumps should be rated for 50% of the
system GPM and the jockey pump should be rated for 25% of the system GPM.
TO DETERMINE PUMP HEAD:
(Total Dynamic Head Expressed in Feet)
(1) Vertical distance between pump and highest fixture.
(2) Plus friction loss through the piping system.
(3) Plus the pressure required at the highest fixture.
(4) Plus 10-ft. friction loss through the SP system.
(5) Less the minimum suction head available.
(PSI x 2.31 = Feet of Head. Feet of head x .433 =
PSI.)
Click Here for List Prices
Click Here for Suggested
Specifications
SP Selection Table
|
System Number
|
GPM Each Pump*
|
Pump Head |
Main Pump H.P.
|
Jockey Pump H.P.
(Trip. B Only)
|
Conn. Size
Simplex
|
Suction &
Discharge Header Size |
Main Control
Valve Size
|
Jockey Valve
Size (Trip. B) Only)
|
|
Lbs.
|
Feet
|
Duplex
|
Trip.A
|
Trip.B
|
|
SP-4020-2
4030-2
4040-2
4050-2
4060-2
4070-2
4080-2
4090-2
40100-2 |
40 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
1½
1½
1½
3
5
5
5
7½
10 |
1
1
1
2
3
3
5
5
7½ |
2 |
2½
|
2½
|
2½
|
1½ |
1½ |
|
SP-6020-2
6030-2
6040-2
6050-2
6060-2
6070-2
6080-2
6090-2
60100-2 |
60 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
1½
2
3
5
5
5
7½
7½
10 |
1
1
1½
3
3
3
5
5
7½ |
2 |
2½ |
3 |
2½ |
1½
|
1½ |
|
SP-8020-2
8030-2
8040-2
8050-2
8060-2
8070-2
8080-2
8090-2
80100-2 |
80 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
1½
3
5
5
7½
7½
7½
10
15 |
1
1
2
3
5
5
5
7½
10 |
2 |
2½ |
3 |
3 |
2 |
1½ |
|
SP-10020-2
10030-2
10040-2
10050-2
10060-2
10070-2
10080-2
10090-2
100100-2 |
100 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
1½
3
5
5
7½
10
10
15
15 |
1
1½
3
3
5
5
7½
7½
10 |
2½
|
3 |
4 |
3 |
2 |
1½ |
|
SP-12020-2
12030-2
12040-2
12050-2
12060-2
12070-2
12080-2
12090-2
120100-2 |
120 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
2
3
5
7½
7½
10
15
15
15 |
1½
2
3
5
5
5
7½
10
10 |
2½ |
3 |
4 |
4 |
2 |
1½ |
|
System Number
|
GPM Each Pump*
|
Pump Head |
Main Pump H.P.
|
Jockey Pump H.P.
(Trip. B Only)
|
Conn. Size
Simplex
|
Suction &
Discharge Header Size |
Main Control
Valve Size
|
Jockey Valve
Size (Trip. B) Only)
|
|
Lbs.
|
Feet
|
Duplex
|
Trip.A
|
Trip.B
|
|
SP-14020-2
14030-2
14040-2
14050-2
14060-2
14070-2
14080-2
14090-2
140100-2 |
140 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
3
5
7½
7½
10
10
15
15
20 |
1½
2
3
5
7½
7½
7½
10
10 |
2½ |
4 |
4 |
4 |
2½
|
1½ |
|
SP-16020-2
16030-2
16040-2
16050-2
16060-2
16070-2
16080-2
16090-2
160100-2 |
160 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
3
5
7½
10
10
15
15
20
20 |
1½
3
5
5
7½
7½
7½
10
15 |
3 |
4 |
5 |
4 |
2½ |
1½ |
|
SP-18020-2
18030-2
18040-2
18050-2
18060-2
18070-2
18080-2
18090-2
180100-2 |
180 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
5
5
7½
10
10
15
15
20
20 |
1½
3
5
5
7½
7½
10
10
15 |
3 |
4 |
5 |
4 |
2½
|
1½ |
|
SP-20020-2
20030-2
20040-2
20050-2
20060-2
20070-2
20080-2
20090-2
200100-2 |
200 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
5
7½
7½
10
15
15
15
20
25 |
1½
3
5
5
7½
10
10
15
15 |
3 |
4 |
5 |
5 |
3 |
1½ |
|
SP-25020-2
25030-2
25040-2
25050-2
25060-2
25070-2
25080-2
25090-2
250100-2 |
250 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
5
7½
10
15
15
15
20
25
25 |
2
3
5
7½
7½
10
10
15
15 |
3 |
5 |
6 |
5 |
3 |
2 |
|
SP-30020-2
30030-2
30040-2
30050-2
30060-2
30070-2
30080-2
30090-2
300100-2 |
300 |
20
30
40
50
60
70
80
90
100 |
45
70
95
115
140
160
185
210
230 |
7½
7½
15
15
20
20
25
30
30 |
3
5
7½
7½
10
15
15
20
20 |
4 |
5 |
6 |
5 |
3 |
2 |
DIMENSIONS
|
|
STANDARD DUPLEX SYSTEM
|
DUPLEX SYSTEM WITH CUSHION-STOP
TANK
|
STANDARD TRIPLEX SYSTEM
|
TRIPLEX SYSTEM WITH CUSHION-STOP
TANK
|
|
A |
41 |
66 |
66 |
84 |
|
B
|
25 |
50 |
50 |
74 |
|
C |
29 |
29 |
29 |
29 |
|
D |
27 |
27 |
27 |
27 |
|
E |
54 |
66 |
54 |
66 |
|
G |
(4)
|
(4)
|
(4)
|
(4)
|
|
K |
7/8 |
7/8 |
7/8 |
7/8 |
|
MOTOR FRAME
|
3450 RPM H.P.
|
1750 RPM H.P.
|
F
|
|
143JM |
1-1/2 |
1 |
7-1/2 |
|
145JM |
2-3 |
1½-2 |
7-1/2 |
|
182JM |
5 |
3 |
8-1/2 |
|
184JM |
7-1/2 |
5 |
8-1/2 |
|
213JM |
10 |
7-1/2 |
9-1/4 |
|
215JM |
15 |
10 |
9-1/4 |
|
254JM |
20 |
15 |
10-1/4 |
|
256JM |
25 |
20 |
10-1/4 |
|
284JM |
30 |
25 |
11 |
|
|
TOTAL PUMP GPM
|
H |
J
|
|
160 & less |
2-1/2 |
2-1/2 |
|
161 thru 240 |
3 |
3 |
|
241 thru 420 </ | | |
