N305M_2007

N305M_2007
MODEL
N305M
BRONZE CLOSE COUPLED
RUBBER IMPELLER PUMP
PERFORMANCE TABLE
PIPE SIZE 3/4”
Water 70oF (neoprene impeller)
Model
N305M
C81
Voltage
12 VDC
HP
1/4
Feet Hd
10
20
40
60
80
Pressure
4.3
8.7
17.3
26.0
34.6
Flow (GPM)
7.1
Speed (RPM)
8295
N305M
C82
Current (AMPS)
24 VDC
1/4
Flow (GPM)
8295
C84
1/4
Flow (GPM)
N305M-08
F93
Current (AMPS)
24 VDC
1/3
Flow (GPM)
3073
N305M-08
F50
N305M-08
F97
115/230
VAC TEFC
1/3
Flow (GPM)
230/460
VAC TEFC
1/3
Flow (GPM)
16.0
1920
1780
Speed (RPM)
1780
6.4
2.0
2140
12.4
14.8
2120
17.1
9.7
1930
1880
17.8
21.9
9.6
1920
8.3
12.9
2160
10.3
12.9
12.9
Speed (RPM)
8458
8456
1950
Current (AMPS)
11.9
2190
13.0
13.8
Speed (RPM)
N305M-C81
9.5
13.8
Speed (RPM)
2924
9.2
14.5
2200
Current (AMPS)
12 VDC
1040
8.4
15.3
Speed (RPM)
N305M-08
6.7
1050
9.3
12.1
1780
12.1
1780
4.7
1910
1860
11.1
8.9
1780
8.9
1780
13.9
4.2
1770
4.2
1770
Notes: Maximum recommended operating point
LIQUIDS AND TEMPERATURE
N305M-08F50
FEATURES
•
•
•
•
•
•
•
Bronze construction - Corrosion resistant
Buna Mechanical seal
Portable
Slotted motor base
Neoprene Impeller STD (Buna optional N305M-02)
Stainless Steel Shaft
Buna O-ring seal between body and cover eliminates
gasket problems
• Impeller easily replaced
• Available with AC or DC motors
IMPORTANT
Performance is based on full voltage supply. Use
direct lines. Do not drain voltage with other electrical equipment on same circuit. Lower voltage reduces performance
and overloads motor. Use adequate wires size and length to
maintain supply voltage.
MOUNTING
Pump will operate satisfactorily when mounted in any
position.
SUCTION LIFT
Suction lift of 15 ft. is possible when impeller is wet. Suction
lines must be air tight in order for pump to self prime. a foot valve at
beginning of suction line is recommended.
IMPELLER REPLACEMENT
The impeller must be replaced if it is worn out or has been damaged
by debris or by running the pump dry. Symptoms of a defective
impeller are low pumping pressure and low flow
To replace the impeller remove screws and cover. Pull out the
impeller with nose pliers or two screwdrivers. Be careful not to dent
the pumping chamber with these tools. When inserting new impeller,
line up key slot in impeller with the key in the shaft. Use oil on shaft
and avoid forcing the impeller onto the shaft.
The impeller should also be removed for storage periods to
prevent the blades from taking a permanent set.
SEAL REPLACEMENT
DO NOT RUN DRY
Rubber impellers generate high rubbing friction unless
lubricated by liquid pumped. Lack of liquid will cause
impeller to burn up.
DRIVE & ROTATION
The pump is driven directly from the electric motor
shaft. An aluminum adapter connects the pump to the motor.
Reversing supply leads to motor terminals reverses motor
rotation. “In” and “Out” pump ports are also reversed. See
diagram on reverse side.
www.oberdorfer-pumps.com
Liquids compatible with neoprene can be pumped including
fresh and salt water solutions and mild chemicals. Do not pump
severe solvents or acids. When possible flush pump with fresh
water after each use.
Extremes of cold and heat will affect impeller life. Limits of
40o to 140oF should be observed. Do not allow liquid in pump to
freeze. Drain pump by loosening cover screws. Use methyl alcohol
based anti-freeze compounds such as Zerex, Shell Zone, Pyro
Permagard, Dowgard.
If water drips from the weep hole or from the area where the
shaft exits the pump, the seal is defective and must be replaced.
Prolonged running of the pump with a leaky seal can destroy the
motor bearings resulting in catastrophic pump failure.
For seal replacement, the pump must be removed from the
motor and disassembled in order to gain access to the seal area.
Where mechanical seals are used, both components (stationary and
rotating member) must be replaced at the same time.
Refer to exploded view drawings for seal location and part
numbers for ordering purposes.
PHONE (800) 448-1668; (315) 437-0361
FAX (315) 463-9561
MODEL
N305M
BRONZE CLOSE COUPLED
RUBBER IMPELLER PUMP
EXPLODED VIEW AND PARTS LIST
Pump No.
Config
N305M
Neoprene
M305M-02
Buna
1
2
3*
8*
9
10
11*
12
13
14
15
16
17
18
19
Body
Cover
Impeller
O-Ring
Screw
Screw
Seal
Screw
Shaft
Key
Key
Collar
Adapter
Motor
Washer
1 Reqd
1 Reqd
1 Reqd
1 Reqd
4 Reqd
1 Reqd
1 Reqd
4 Reqd
1 Reqd
1 Reqd
1 Reqd
1 Reqd
1 Reqd
1 Reqd
1 Reqd
8318-1
6736
6620
8231
5504
5595
32230
5916
8319
6739
6845
7991
6631
Repair
Kit
7990
---
8647
5916
7990
---
10704
12187
N305M
C81 Neoprene / 1/4 HP/12VDC
6620
5916
7990
8295
10704
N305M
N305M-08
N305M-08
N305M-08
N305M-08
C82
C74
F93
F50
F97
6620
6620
6620
6620
6620
5916
5411
5411
5411
5411
7990
7459
7459
7459
7459
8295
2924
3073
8458
8456
10704
10704
10704
10704
10704
Neoprene
Neoprene
Neoprene
Neoprene
Neoprene
/
/
/
/
/
1/4
1/4
1/4
1/3
1/3
HP/24VDC
HP/12VDC
HP/24VDC
HP/120VDC
HP/460VDC
* Repair kit includes items 3, 8, and 11
N305M-C81
DIMENSIONS
N305M-08F50
STANDARD ROTATION
6/07
Specifications are subject to change without notice.
www.oberdorfer-pumps.com
PHONE (800) 448-1668; (315) 437-0361
FAX (315) 463-9561
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