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Vacuum Pumps > Oil-Sealed Mechanical Pumps > Rotary Vane Pumps

Welch® Standard and Chemstar

Welch: Belt-Drive Standard Vane Pumps

The low pump speed and belt drive combine to reduce operating wear and temperature, thereby reducing maintenance and oil vapor backstreaming. Use these pumps for all general purpose roughing and backing applications that demand longevity.

The low pump speed and "decoupling" of the belt drive makes this 1399 pump run cooler than equivalent direct-drive pumps. The reduced wear increases the operating life and the reduced temperature decreases backstreaming. Used for vacuum distilations, glove box transfers, residual solvent removal, and resin degassing.

Welch: Belt-Drive Chemstar Pump

These N-01 pumps are versions of 1376, 1399, 1400, and 1402 pumps, modified to make all vital parts corrosion resistant. The oil case is PTFE coated; fluorocarbon seals and gaskets are used throughout; and many internal components are made from stainless steel. The large, low volume and slow speed enable this pump to accept high contamination levels even in dusty environments. We recommend these pumps for many dirty applications with corrosive gases.

KJLC offers pump repair kits for all pumps (prices available upon request), and pump repair service.

Remanufactured Vacuum Pumps
Remanufactured Pumps

View a list of remanufactured vacuum pumps available from The Kurt J. Lesker Company's Remanufactured Vacuum Pump Division.
View List ▶

Vacuum Pump Repair & Services
Pump Repair & Services

Our factory-trained vacuum pump service technicians are equipped to handle the maintenance and repair of virtually any brand and type of vacuum pump.
View Details ▶


Specifications Table

Pump Model Chemistry Disp. CFM @ 60 Hz
(m3/hr @ 50 Hz)
Ult. Pressure
Torr (mBar)
Motor
HP (kW)
Oil Capacity
Quarts (liters)
Oil Type Inlet
Flange
Exhaust
Flange
Weight
lbs (kg)
1374
Standard Series
Hydrocarbon Oil
23
1 x 10-4
(1.3 x 10-4)
1.5 (1.12)
1.25 (1.2)
KJLSS19
1-5/8"
hose barb
1.75", 20 tpi
220 (100)
1376
Standard Series
Hydrocarbon Oil
10.6
1 x 10-4
(1.3 x 10-4)
1 (0.75)
2.5 (2.4)
KJLSS19
13/16"
hose barb
1", 20 tpi
156 (71)
1376N
Standard Series
Hydrocarbon Oil
10.6
1 x 10-4
(1.3 x 10-4)
1 (0.75)
2.5 (2.4)
Permavis 8
QF25
1", 20 tpi
156 (71)
1397
Standard Series
Hydrocarbon Oil
17.7
1 x 10-4
(1.3 x 10-4)
1 (0.75)
1.25 (1.2)
KJLSS19
1-5/8"
hose barb
1.75", 20 tpi
205 (93)
1399
Standard Series
Hydrocarbon Oil
1.2
1.5 x 10-2
(1.9 x 10-2)
0.33 (0.25)
0.5 (0.47)
KJLSS19
7/16"
hose barb
3/4", 20 tpi
51 (23)
1399N
Standard Series
Hydrocarbon Oil
1.2
1 x 10-4
(1.3 x 10-4)
0.33 (0.25)
0.5 (0.47)
KJLSS19
7/16"
hose barb
3/4", 20 tpi
63 (28.6)
1400
Standard Series
Hydrocarbon Oil
0.9
1 x 10-4
(1.3 x 10-4)
0.33 (0.25)
0.62 (0.59)
KJLSS19
7/16"
hose barb
3/4", 20 tpi
58 (26)
1400N
Standard Series
Hydrocarbon Oil
0.9
1 x 10-4
(1.3 x 10-4)
0.33 (0.25)
0.62 (0.59)
Permavis 8
QF16
3/4", 20 tpi
58 (26)
1402
Standard Series
Hydrocarbon Oil
5.6
1 x 10-4
(1.3 x 10-4)
0.5 (0.37)
2.25 (2.1)
KJLSS19
13/16"
hose barb
1", 20 tpi
112 (51)
1402N
Standard Series
Hydrocarbon Oil
5.6
1 x 10-4
(1.3 x 10-4)
0.5 (0.37)
2.25 (2.1)
Permavis 8
QF25
1", 20 tpi
112 (51)
1405
Standard Series
Hydrocarbon Oil
3.2
1 x 10-4
(1.3 x 10-4)
0.5 (0.37)
2.25 (2.1)
KJLSS19
7/16"
hose barb
1", 20 tpi
112 (51)

Got VacuCADSM?
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Ordering Table

Pump
Model
Description Inlet
Flange
Manual PartNo Price Add To Cart
Pump
Model
Description Inlet
Flange
Manual PartNo Price Add To Cart
1374
DuoSeal® Unmounted Pump
1-5/8" Hose Barb
Download PDF
SW1374
P.O.R.
1374B-01
DuoSeal, 115VAC, 60 Hz, 1Ph
1-5/8" Hose Barb
Download PDF
SW1374B-01
P.O.R.
1374M-01
DuoSeal, 230/460VAC, 60 Hz, 3Ph
1-5/8" Hose Barb
Download PDF
SW1374M-01
P.O.R.
1376
DuoSeal Unmounted Pump
13/16" Hose Barb
Download PDF
SW1376
$3,700.00
1376B-01
DuoSeal, 115VAC, 60 Hz, 1Ph
13/16" Hose Barb
Download PDF
SW1376B-01
P.O.R.
1376M-01
DuoSeal, 230/460VAC, 60 Hz, 3Ph
13/16" Hose Barb
Download PDF
SW1376M-01
P.O.R.
1376N-01
Chemstar, 115VAC, 60 Hz, 1Ph
KF25
Download PDF
SW1376N-01
P.O.R.
1376N-49
Chemstar, 220VAC, 50 Hz, 1Ph without CE mark
KF25
--
SW1376N-49
P.O.R.
1376N-60
Chemstar, 230VAC, 60 Hz, 1Ph
KF25
Download PDF
SW1376N-60
P.O.R.
1397
DuoSeal Unmounted Pump
1-5/8" Hose Barb
Download PDF
SW1397
P.O.R.
1397B-01
DuoSeal, 115VAC, 60 Hz, 1Ph
1-5/8" Hose Barb
Download PDF
SW1397B-01
P.O.R.
1397C-03
DuoSeal, 220VAC, 50 Hz, 1Ph without CE mark
1-5/8" Hose Barb
Download PDF
SW1397C-03
P.O.R.
1397M-01
DuoSeal, 230VAC, 60 Hz, 3Ph
1-5/8" Hose Barb
Download PDF
SW1397M-01
P.O.R.
1399
DuoSeal Unmounted Pump
7/16" Hose Barb
Download PDF
SW1399
P.O.R.
1399B-01
DuoSeal, 115VAC, 60 Hz, 1Ph
7/16" Hose Barb
Download PDF
SW1399B-01
P.O.R.
1399C-02
DuoSeal, 220VAC, 50 Hz, 1Ph with Schuko Plug
7/16" Hose Barb
Download PDF
SW1399C-02
P.O.R.
1399N-01
DuoSeal, 115VAC, 60 Hz, 1Ph with Pump Plate
7/16" Hose Barb
Download PDF
SW1399N-01
P.O.R.
1400
DuoSeal Unmounted Pump
7/16" Hose Barb
Download PDF
SW1400
P.O.R.
1400B-01
DuoSeal, 115VAC, 60 Hz, 1Ph
7/16" Hose Barb
Download PDF
SW1400B-01
P.O.R.
1400C-02
DuoSeal, 220VAC, 50 Hz, 1Ph without CE mark
7/16" Hose Barb
Download PDF
SW1400C-02
P.O.R.
1400N-01
Chemstar, 115VAC, 60 Hz, 1Ph with Schuko Plug
KF16
Download PDF
SW1400N-01
P.O.R.
1400N-50
Chemstar, 220VAC, 50 Hz, 1Ph with Schuko Plug
KF16
Download PDF
SW1400N-50
P.O.R.
1402
DuoSeal Unmounted Pump
13/16" Hose Barb
Download PDF
SW1402
P.O.R.
1402B-01
DuoSeal, 115VAC, 60 Hz, 1Ph
13/16" Hose Barb
Download PDF
SW1402B-01
P.O.R.
1402C-01
DuoSeal, 230VAC, 60 Hz, 1Ph
13/16" Hose Barb
Download PDF
SW1402C-01
P.O.R.
1402C-02
DuoSeal, 220VAC, 50 Hz, 1Ph with Schuko Plug/CE
13/16" Hose Barb
Download PDF
SW1402C-02
P.O.R.
1402M-01
DuoSeal, 230/460VAC, 60 Hz, 3Ph
13/16" Hose Barb
Download PDF
SW1402M-01
P.O.R.
1402N
Chemstar Unmounted Pump
KF25
Download PDF
SW1402N
P.O.R.
1402N-01
Chemstar, Mounting Pump, 115VAC, 60 Hz, 1Ph
KF25
Download PDF
SW1402N-01
P.O.R.
1402N-50
Chemstar, 220VAC, 50 Hz, 1Ph with Schuko Plug
KF25
Download PDF
SW1402N-50
P.O.R.
1402N-60
Chemstar, Mounting Pump, 230V, 60 Hz, 1Ph
KF25
Download PDF
SW1402N-60
P.O.R.
1405
DuoSeal Unmounted Pump
7/16" Hose Barb
Download PDF
SW1405
P.O.R.
1405B-01
DuoSeal, Mounting Pump, 115VAC, 60 Hz, 1Ph
7/16" Hose Barb
Download PDF
SW1405B-01
P.O.R.
1405C-02
DuoSeal, Mounting Pump, 230VAC, 50 Hz, 1Ph with CE
7/16" Hose Barb
Download PDF
SW1405C-02
P.O.R.

Can't Find The Pump You're Looking For? Let our new Pump Selection Guide help! With over 450 vacuum pumps to choose from, the KJLC® Vacuum Pump Selection Guide is designed to help you find one that meets your vacuum requirements. You can narrow down our pump offering by simply choosing from a list of different search criteria. For more information please e-mail international@lesker.com.

Accessories Table

For Pump Model(s) Description PartNo Price Add
To Cart
For Pump Model(s) Description PartNo Price Add
To Cart
All Standard DUOSEAL Pumps
KJLSS19 Hydrocarbon Oil (1 Gallon)
KJLSS19G1
$45.00
All Standard DUOSEAL Pumps
KJLSS19 Hydrocarbon Oil (1 Quart)
KJLSS19Q1
$17.00
All Standard DUOSEAL Pumps
KJLSS19 Hydrocarbon Oil (5 Gallon Pail)
KJLSS19G5
$160.00
All Standard DUOSEAL Pumps
KJLSS19 Hydrocarbon Oil (55 Gallon Drum)
KJLSS19G55
$1,400.00
All CHEMSTAR Pumps
Permavis 8 Hydrocarbon Oil (1 Gallon)
PV8CA
$80.00
All CHEMSTAR Pumps
Permavis 8 Hydrocarbon Oil (1 Quart)
PV8BL
$25.00
All CHEMSTAR Pumps
Permavis 8 Hydrocarbon Oil (5 Gallon Pail)
PV8CP
$350.00
All CHEMSTAR Pumps
Permavis 8 Hydrocarbon Oil (55 Gallon Drum)
PV8DD
$2,500.00

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