and trouble-free.
Unitized Self-Priming
➀
➁ ➃
➂
Applications
• Sump service
• Tank car unloading
• Duplex pumping lift stations
• Flyash pond transfer
• Waste acid transfer
• Waste treatment lagoon service
Priming Cycle Cutaway Illustrations
1. Sump Filling, Pump Stopped
The casing is shown with the initial prime liquid, which permanently stays in the casing. This serves as the priming liquid necessary to entrain the air contained in the suction line.
2. Pump Start-Up
As the impeller spins, the priming liquid entrains air from the suction pipe and is pumped into the air separator/priming tank portion of the casing. In this chamber the air separates from the priming liquid and vents out the discharge while the priming liquid flows through the bypass slot in the bottom of the casing and back into the impeller eye.
Costs less to buy, install and service than submersible pumps. Utilizes the same power end, shaft, seal chamber and impeller as the Standard ANSI Pump. Only the casing is special.
Unitized
2 X 1.5US-10A
6 X 4US-13A FLOWSERVE DURCO MARK 3
UNITIZED SELF-PRIMING 3500 RPM PUMPS
320 400 480 560
240
FLOWSERVE DURCO MARK 3 UNITIZED SELF-PRIMING 1750 RPM PUMPS
400 600 800 1000
300
FLOWSERVE DURCO MARK 3 UNITIZED SELF-PRIMING 2900 RPM PUMPS
40 50 60 70
FLOWSERVE DURCO MARK 3 UNITIZED SELF-PRIMING 1450 RPM PUMPS
80 100 120 140
200 250 300 CAPACITY CUBIC METERS PER HOUR
CAPACITY US GALLONS PER MINUTE FLOWSERVE DURCO MARK 3
UNITIZED SELF-PRIMING 1150 RPM PUMPS
400 500 600 700
300
1.5 X 1US-6/60
4 X 3US-10H
4 X 3US-13
6 X 4US-13A SCALE
CHANGE
2 X 1.5US-10A
1.5 X 1.5US-82 2X1.5 1.5 X 1.5US-82
1.5X1.5 US-82
1.5 X 1.5US-82
60 Cycle
50 Cycle
46 Graph C
S = Minimum Submergence, ft
0 2 4 6 8 10 12 14 16 S = Minimum Submergence, m
Static Suction Lift
The higher the lift, the greater the amount of air in the suction pipe to evacuate and the longer the priming time. Example illustrated: A 3x2US-13 pump with a 330 mm (13 in) impeller lifting water 3 m (10 ft) would take 18 seconds (Graph A).
A lift of 4.6 m (15 ft) would take 30 seconds.
Specific Gravity
As specific gravity increases, priming times also increase.
For example: A pump previously lifting 3 m (10 ft) of water (1.0 sp.Gr.) is now pumping a liquid with a specific gravity of 1.4. The 3 m (10 ft) actual lift x 1.4 sp.gr. becomes an effec-tive lift of 4.3 m (14 ft), for a priming time of 26 seconds.
To be conservative for specific
gravities lower than 1.0, use 1.0 in the equation. The practical limit of a self-priming pump is 6.1 m (20 ft), divide this amount by specific gravity to determine the actual lift limit.
For example: 6.1 m (20 ft) ÷ 1.4
= 4.4 m (14.3 ft) maximum possible lift.
Suction Pipe Size
The self-priming pump primes by evacuating the air in the suction piping. The priming time curves are based on the volume of air contained in a pipe length equal to the actual static lift shown plus that contained in 1 m (3 ft) of horizontal run into the pump.
The pump example lifting liquid 3 m (10 ft) and horizontally 1 m (3 ft) contains 0.0188 m3 (1150 in3) of air in the suction
pipe (Graph B).
Extending the pipe’s horizontal run to 2.7 m (9 ft) gives an additional 0.0090 m3(530 in3) of air to evacuate before achieving prime.
1680
1150 x 18 sec = 26 seconds,
or
8 seconds longer priming time.
When a self-priming pump primes, a signifi-cant volume of air is evacuated from the suction line. A self-priming pump will not work unless there is a way for the air to be vented. Flowserve suggests that a vent line be run from the discharge as shown on the diagram to the above.
Suction Pipe Velocity, m/s Suction Pipe Velocity, f/s
Individual pump curves found in Bulletin P-12-102 contain graphs of both hydraulic performance and priming time.
Once a pump has been selected based on speed, efficiency, flow and head, priming times may be determined from these graphs. As pump performance varies with RPM and impeller diameter, priming times also change. Factors such as static suction lift distance, specific gravity and suction pipe size also have a direct bearing upon priming times.
Graph A Graph B
VOLUME, m3 VOLUME, in30.082
0.066 LENGTH OF PIPE, m
150 mm (6 in) STD PIPE 100
Unitized Self-Priming Dimensions
Pump Dimensions
Pump U V
Weight X O CP D D5 D6 D9 F H Dia. Keyway Min.
Pump kg (lb) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) 1J11/2x1US-6 54 (120) 121 (43/4) 318 (121/2) 511 (201/8) 133 (51/4) 115 (49/16) 115 (49/16) 102 (4) 168 (65/8) 64 (21/2) 22 (7/8) 4.8x2.4
56 (23/16) 1K11/2x11/2US-8 70 (154) 98 (37/8) 378 (147/8) 521 (201/2) 178 (7) 140 (51/2) 140 (51/2) 127 (5) 178 (7) 102 (4) 22 (7/8) (3/16x3/32) 2K2x11/2US-10A 145 (320) 152 (6) 464 (181/4)
725 (289/16) 210 (81/4) 175 (67/8) 175 (67/8)
133 (51/4) 229 (9) 102 (4) 29 (11/8) 6x3 (1/4x1/8) 2K3x2US-10 154 (340) 165 (61/2) 476 (183/4) 185 (71/4) 185 (71/4)
2K3x2US-13 191 (420) 203 (8) 559 (22) 725 (289/16)
225 (87/8) 225 (87/8) 133 (51/4) 229 (9) 102 (4) 70 (23/4) 2K4x3US-10H 195 (430) 191 (71/2) 572 (221/2)
776 (309/16) 254 (10)
146 (53/4) 279 (11) 127 (5) 29 (11/8) 6x3 (1/4x1/8) 2K4x3US-13 236 (520) 216 (81/2) 597 (231/2) 243 (99/16) 243 (99/16)
2K6x4US-13A 286 (630) 254 (10) 660 (26) 813 (32) 279 (11) 268 (109/16) 268 (109/16) 152 (6) 316 (127/16) 127 (5) 29 (11/8) 6x3 (1/4x1/8)
Baseplate Mounting Dimensions
Max. HA HD1▲ HD2▲ HD3 HG
Pump Base- Motor Weight mm (in) HB mm (in) mm (in) mm (in) HE HF mm (in) HH
Group plate Frame kg (lb) Metal Poly. mm (in) Metal Poly. Metal Poly. Metal Poly. mm (in) mm (in) Metal Poly. mm (in) 139 184T 50 (111) 381 (15) 330 (13) 991 (39) 229 (9) 226 (87/8) 273 (103/4) 269 (105/8) 114 (41/2) 927 (361/2) 95 (33/4) 92 (35/8) 148 215T
74 (163) 457 (18) 406 (16) 1219 (48) 241 (91/2) 245 (95/8)
283 (111/8) 286 (111/4) 152 (6) 1156 (451/2) 105 (41/8) 108 (41/4)
GP 1 256T 267 (101/2) 270 (105/8)
1K 153 286T
96 (212) 533 (21) 483 (19) 1346 (53) 302 (117/8) 289 (113/8) 302 (117/8) 289 (113/8)
191 (71/2) 1283 (501/2) 121 (43/4) 108 (41/4) 19 (3/4) 326TS 327 (127/8) 314 (123/8) 327 (127/8) 314 (123/8)
245 184T 59 (129) 381 (15) 330 (13) 1143 (45) 305 (12) 302 (117/8) 349 (133/4) 346 (135/8) 375 (143/4) 372 (145/8) 114 (41/2) 1080 (421/2) 95 (33/4) 92 (35/8) 252 215T 80 (177) 457 (18) 406 (16) 1321 (52) 319 (123/8) 302 (117/8) 359 (141/8) 346 (135/8) 384 (151/8) 372 (145/8) 152 (6) 1257 (491/2) 105 (41/8) 92 (35/8) 258 286T 106 (234) 533 (21) 483 (19) 1473 (58) 330 (13) 312 (121/4) 375 (143/4) 355 (14) 400 (153/4) 381 (15) 1410 (551/2)
GP 2
264 326T
149 (328) 559 (22) 559 (22) 1626 (64) 330 (13) 318 (121/2)
375 (143/4) 362 (141/4) 400 (153/4) 381 (15) 191 (71/2)
1562 (611/2)
2K 365T 352 (137/8) 340 (133/8) 121 (43/4) 108 (41/4) 25 (1)
268 405TS 186 (409)
660 (26) 660 (26) 1727 (68) 378 (147/8) 365 (143/8) 378 (147/8) 365 (143/8) 400 (153/4) 381 (15)
241 (91/2) 1664 (651/2) 280 449TS 218 (481) 2032 (80) 403 (157/8) 391 (153/8) 403 (157/8) 391 (153/8) 403 (157/8) 384 (151/8) 1969 (771/2) GP 1 – HD1applies to 1J11/2x1US-6 ▲ Includes spacer under pump, as necessary.
HD2applies to 1K11/2x11/2US-82
GP 2 – HD1applies to 2L2x11/2US-10A and 2K3x2US-10 HD2applies to 2K3x2US-13, 2K4x3US-13 and 2K4x3US-10H HD3applies to 6x4US-13A
Unitized Self-Priming Parts
Group 1 and Group 2
ITEM DESCRIPTION
100 CASING
103 IMPELLER
104 IMPELLER GASKET
105 SHAFT
106 REAR COVER PLATE 107 REAR COVER GASKET 108 BEARING HOUSING ADAPTER*
109 BEARING HOUSING FOOT
109A SHIM
110 GLAND - PACKING OPT.
111 STUD - GLAND 111A HEXNUT - GLAND
112 PACKING SEAL CAGE HALVES OPT.
113 PACKING OPT.
114 DEFLECTOR INBOARD OPT.
115 STUD - CASING 115A HEXNUT - CASING 118 OIL SEAL INBOARD 119 BEARING HOUSING 120 BEARING INBOARD 121 BEARING OUTBOARD
122 OIL SLINGER OPT.
124 LOCKNUT - BEARING 125 LOCKWASHER - BEARING 129 OIL SEAL OUTBOARD 130 KEY - SHAFT/COUPLING 131 O-RING - ADAPTER*
133 TRICO OILER (Not Shown) 134 BEARING HOUSING DRAIN PLUG 135 BEARING HOUSING VENT PLUG 136 CAPSCREW - FOOT
139 CAPSCREW - BEARING HOUSING*
140 CAPSCREW - COVER/ADAPTER 153 MECHANICAL SEAL
177 HOOK SLEEVE OPT.
190 GLAND - MECHANICAL SEAL 190G GLAND GASKET
200 SIGHT GAGE - BEARING HOUSING 201 BEARING CARRIER
201A SET SCREW - BEARING CARRIER 201B O-RING - BEARING CARRIER 201C BEARING CARRIER RETAINER 201D CLAMP RING BEARING HOUSING OPT.
201E SOC-CAPSCREW CLAMP OPT.
Option for duplex angular contact bearings
Group 2 shown. See page 32 for Group 1 pumping unit details.
*GROUP 2 ONLY.
Combine Flowserve Durco Priming Tanks with most standard pumps to create simple and reliable self-priming systems.
Benefits
• Allows the pump to sit high and dry. Easy access for maintenance. No need for troublesome vertical sump pumps or elaborate hoisting equipment.
• Zero priming time reduces stress on seals and bearings that occurs during priming cycle with self-priming pump designs.
• Air bleed line from pump discharge common with self-priming pump is not required.
Applications
• Sump pump service
• Tank car unloading
• Flows to 1364 m3/h (6000 gpm) Special designs to 5682 m3/h (25 000 gpm)
Common Pump Types
• Standard ANSI/ISO
• Sealless pumps
• Recessed impeller/vortex type pumps Solids to 100 mm (4 in)
• Low flow/high head
• Non-metallic
Materials of Construction
• Carbon Steel
• 316SS
• FRP
• Others on request
• Capacities to 318 m3/h (1400 gpm)
• Heads to 52 m (170 ft) Also available:
the original unitized self-priming pump