KNF N811KTP, N811KNP, N816.3KTP, N86KTP, N816.3KT.45P Operating And Maintenance Instructions Manual

SECTION 941.25

Limited Warranty

KNF NEUBERGER, INC. (KNF) warrants to buyer that its products will be free from
defects in material and workmanship under normal and appropriate use, and agrees to
repair or replace any of its products without charge for parts or labor within one year
from the date of shipment to the original purchaser.

Products to be evaluated for warranty coverage:

Determination of coverage under this warranty is the sole responsibility of the
manufacturing engineering representative of KNF. This determination will frequently
require the return of the product to KNF. All product returns will be handled in
accordance with KNF’s product return policy. KNF reserves the right to inspect custom
installations and devices that use KNF products as part of the warranty evaluation
process.
This warranty does not cover any misuse, negligence, deterioration by chemical action,
unauthorized repair or alteration in any way, inappropriate handling or storage that in
our judgement caused the product failure. KNF shall not be liable for any inconvenience,
loss of use, or any consequential loss, damage or injury arising from any cause
whatsoever. No employee, agent or representative of KNF shall have any right or
authority to vary or alter the terms of this warranty. This warranty gives you specific
legal rights, and you may have other rights which vary from state to state.

Limitations

KNF offers engineering and technical assistance to support the application and selection
of our products. Except as otherwise agreed to in writing, it is expressly

understood that this warranty is in lieu of any and all other warranties, whether
expressed or implied, with respect to the goods sold, including any warranty of
merchantability and fitness for a particular purpose. Sole responsibility or
liability of KNF shall be to replace any products or parts thereof which shall not
conform to such warranty, provided that the products are used in accordance
with KNF specifications. Customer is responsible for determining the suitability
of our products for customer’s use or resale, or for incorporating them into
objects or for applications which customer designs, assembles constructs or
manufactures. Please call our Technical Sales Department for further information.
Return Requests / Inquiries

Direct all warranty and repair requests to the KNF Customer Service Department for
instructions before returning any unit for repair or evaluation. We will fax you a “Return
Instruction Sheet” for guidance on the proper marking, packing and documentation
requirements or you can download this form from our website at http://www.knf.com
by clicking on the Service/Support button.
Important information conforming to the “Right To Know” act, such as a Material Safety
Data Sheet may be required.

Products shipped to KNF must have a Return Materials Authoriza­tion Number (RMA) file number marked on the outside of the pack­age, otherwise they will be refused by our receiving department.

8 Filtration Pumps

Operating and Maintenance

Instructions

For service or parts, CONTACT:

KNF NEUBERGER, INC.

Two Black Forest Road
Trenton, New Jersey 08691-1810
Fax: [phone] · Phone: [phone]
Website: www.knf.com

SECTION 941.25 (0107)

LABOPORT

®

Filtration Pumps

For Models:

N86KNP N811KNP N816.3KTP
N86KTP N811KTP N816.3KT.45P
N86KT.45P N811KT.46P N816.1.2KTP
N86KT.46P N811KVP N816.1.2KT.45P
PU837 N811KV.45P N838.3KTP
PU838 PU839 N838.3KT.45P

PU840 N838.1.2KTP
MPU953 N838.1.2KT.45P

This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety mes­sages that follow this symbol to avoid property dam­age, possible injury or death.

Pump Features

These KNF pumps are compact, lightweight and easy to use for your flask fil­tration, vacuum manifold and vacuum blotting applications. Our models use
premium, corrosion-resistant wetted parts. All are fitted with KNF’s patented
multi-port valve system that increases performance and tolerates any liquids
accidentally drawn into the system without loss of performance.
Models are available with either a vacuum or pressure gauge and a conve­nient machined-brass bleeder valve for fine adjustment of performance.
Needle bounce is negligible.
The ball-bearing motor is fan-cooled and is permanently lubricated. The
heads and valves are easily disassembled for occasional cleaning without the
need for special tools or training, and can be reassembled in minutes.

Performance Specifications

Model No.

Free-Flow

Max. Vac. Max Press. Port x Hose

N86KNP* ............................... 6 LPM ...... 75 Torr ...... 35 psig ......

1

/8”x 1/4”HID

N86KTP* ............................. 5.5 LPM... 120 Torr ...... 35 psig ......1/8”x 1/4”HID

N86KT.45P*

(formerly PU837) ..

5.5 LPM ... 120 Torr ...... 35 psig ......1/8”x 1/4”HID

N86.KT.46P*

(formerly PU838) .

5.5 LPM ... 120 Torr ...... 35 psig ......1/8”x 1/4”HID

N811KNP* ......................... 11.5 LPM .. 180 Torr ...... 30 psig ......1/8”x 1/4”HID

N811KTP* .......................... 11.5 LPM .. 218 Torr ...... 30 psig ......

1

/8”x 1/4”HID

N811KT.46P*

(formerly PU840)

11.5 LPM .. 218 Torr ...... 30 psig ......1/8”x 1/4”HID

N811KVP*

(formerly MPU953) .....

13 LPM ..... 75 Torr .. Vacuum Only1/8”x 1/4”HID

N811KV.45P*

(formerly PU839)

13 LPM .... 75 Torr .. Vacuum Only1/8”x 1/4”HID

N816.3KTP ........................... 16 LPM ..... 15 Torr .. Vacuum Only

1

/8”x 1/4”HID

N816.3KT.45P ...................... 16 LPM ..... 15 Torr .. Vacuum Only1/8”x 1/4”HID

N816.1.2KTP ........................ 30 LPM .... 120 Torr ...... 7.4 psig .....

1

/8”x 1/4”HID

N816.1.2KT.45P ................... 30 LPM .... 120 Torr ......7.4 psig .....

1

/8”x 1/4”HID

N838.3KTP ........................... 22 LPM ..... 11 Torr ....... 7.4 psig .....1/8”x 3/8”HID

N838.3KT.45P ...................... 22 LPM ..... 11 Torr ....... 7.4 psig .....

1

/8”x 3/8”HID

N838.1.2KTP ........................ 37 LPM .... 113 Torr ...... 7.4 psig .....

1

/8”x 3/8”HID

N838.1.2.45P ........................ 37 LPM .... 113 Torr ...... 7.4 psig .....1/8”x 3/8”HID

*Pumps are the same with or without “U” preceeding the Model Number.

Notes:

1. Limit discharge pressure to max rated pressure.

2. If your pump’s model number is different than those listed above, please

contact KNF Customer Service for specific details about your pump’s per­formance.

3. Use

1

/8”NPT plastic fittings for inlet and outlet ports. Use

only plastic

fit-

tings with Ryton® head materials to avoid damaging the heads.

2 Filtration Pumps Filtration Pumps 7

Expanded View of a Typical Pump Head

Ryton® is a registered trademark of Phillips66. Teflon® is a registered trademark of DuPont. Kalrez

®

is a registered trademark of DuPont Dow. Viton® is a registered trademark of DuPont.

Notes:

WARNING

KNF portable pumps are not explosion proof, however, most
have been evaluated and approved by UL for laboratory use, ac­cording to General Requirement UL6101.1. As with all labora­tory procedures, safety codes (i.e., NFPA 45, Fire Protection for
Laboratories Using Chemicals) pertaining to proper laboratory
ventilation and solvent handling should be adhered to, espe­cially when processsing potentially toxic and/or combustible liq­uids and vapors.

Operating Instructions

The following guidelines should be read before operating pump:

1. KNF units are 100% oil-free. All bearings are sealed and permanently lu­bricated. Lubrication must not be attempted. For bearing replacement,
call KNF Customer Service. Bearings are not field-replaceable.

2. Be sure that the available electric power matches specifications of the
electric motor listed on the identification plate. Serious damage may oc­cur to the motor if connected to an improper voltage. All KNF units must
be grounded. In the event of an electrical short circuit, grounding reduces
the risk of electric shock. Do not remove the ground pin from the plug.

2. This product is equipped with a cord having a grounding wire with an ap­propriate grounding plug. The plug must be plugged into an outlet that is
properly installed and grounded in accordance with all local electrical
codes and ordinances.

3. The pump should be placed where the surrounding temperature remains
between 40°F and 104°F (5°C and 41°C). This is particularly important
when the unit is installed in a confined space. Do not block the ventilation
ports located on the ends of the motor housing.

4. Standard models are designed to start against atmospheric pressure only,
not under any vacuum or pressure load. Care must be taken to eliminate
load after pump is turned off.

5. Use only to pump air or gas, not liquids or particulates. Damage to the
pump or loss of performance can occur if large amounts of liquid or par­ticulates enter the system. The life of the pump can be prolonged if the
formation of condensate within the pump is avoided.

6. Always install the pump in such a location that its external parts are pro­tected from direct or indirect moisture contact.

7. Avoid operating the pump in very dusty conditions.

8. Output flow should not be throttled or restricted for any reason.

9. Be sure that the pump is installed at the highest point within the system to
prevent large quantities of condensate from entering the unit.

10. Remove any protective plastic plugs supplied in the intake or pressure
ports of your pump prior to applying power to the motor.

11. Run the pump for a few minutes to warm it up before handling saturated
or nearly saturated vapors.

12. To avoid damaging Ryton

®

heads, use only plastic hose barb fittings.

13. After use, let the pump run for about 2 minutes with room air before

Filtration Pumps 3

6 Filtration Pumps

scratch the Ryton® surfaces. The area around the valve plate must be
smooth and dry. If pitting of the pump parts or tearing of the diaphragm is
observed, it is possible that the gas/vapor being pumped is attacking the
wetted parts of the pump. Chemical resistance charts should be con­sulted if you are in doubt. Generally, replacement of the diaphragm, seal
rings and valve plates will restore the pump to operating specifications.
Pitted head parts may require replacement for maximum pump perfor­mance.

8. Install new seal rings E and valve plates D from the spare parts kit.

(Skip

to step 14 to reassemble head without replacing diaphragm)

To replace the diaphragm:

9. Prior to removing diaphragm, please note the presence of shim rings lo­cated under the diaphragm, which must be reinstalled in the original
quantity for proper pump operation.

(See exploded view)

10. Carefully lift the diaphragm F edge from the circular groove, and un­screw the diaphragm from connecting rod M by hand. Note position of all
parts for proper reassembly. Placement of various components varies
with model.

11. Carefully note the quantity and thickness of shim washers J on the
diaphragm’s threaded stud, as the

exact quantity and thickness

must be

replaced when installing the new diaphragm.

Hint: It may be easier to
perform the next step by holding the pump upside down before screwing
the assembled parts into the connecting rod.)

12. Assemble all of the components as per the diagram, over the threaded

stud end of the replacement diaphragm F and position over the threaded
hole in the lower support cup. Be sure all parts are centered. Screw and
tighten in the new diaphragm by hand. Do not overtighten diaphragm.

13. Once installed, press down on the diaphragm until the lip on the edge of
the diaphragm fits into the groove on the rim of the mounting flange.

14. Reassemble the headplate A, (note guide pin) and intermediate plate C in
accordance with the mark you made in step 2.

15. Replace the center screw(s) P,

(if supplied)

properly positioned, in the
center of the pump head and turn until each screw is just snug. To avoid
damaging head assembly, do not overtighten center screws.

16. Replace the pump head assembly and tighten head screws B snugly in a

crosswise pattern. Do not overtighten screws.

17. Replace rubber protective boot.

Note: Should you need to send a KNF pump to our factory for repairs, please

be sure to read the instructions in the Limited Warranty section with re­gard to obtaining a required RMA (Return Materials Authorization) num­ber and Material Safety Data Sheet prior to shipment.

4 Filtration Pumps Filtration Pumps 5

switching it off, to purge out droplets of liquid that may have formed on
the inside of the pump. This prevents crystallization and/or absorption of
liquids by the pump materials, and prolongs pump life.

Spare Parts Kits

Each kit contains the following parts to renew one head:

Qty Description

1 ................................................................................. Structured Diaphragm

2 .................................................................................................. Valve Plates

2 ..................................................................................................... Seal Rings

For Model Use Kit ID#:

N86KNP ................................................................................................ 072838

N86KTP, N86KT.45P, N86KT.46P, PU837, PU838 ............................072839

N811KNP ............................................................................................. 074626

N811KTP, N811KT.46P, PU840 .......................................................... 074931

N811KVP, N811KV.45P, PU839, MPU953 .........................................074178

N816.3KTP*, N816.3KT.45P*, N816.1.2KTP*, N816.1.2KT.45P* ....077769

N838.3KTP*, N838.3KT.45P*, N838.1.2KTP*, N838.1.2KT.45P* ....202884

Note: Each kit contains parts to renew one head. *For twin-head pumps, two kits are
required. Additional replacement parts are availabe through KNF Customer Service:

Replacement Parts (to order, contact KNF Customer Service)

1

/4”Hose Barb Fittings 1/8”NPT Shim Rings
Pressure Gauge/Regulator Package Diaphragm Support Cup
Vacuum Gauge/Regulator Package Spring & Spacer Washers

Troubleshooting

Maximum vacuum is not reached—

1. Check that all system connections are gas-tight.

2. Be sure that all screws on the head assembly are snug.

To avoid damag-

ing pump, do not overtighten screws.

3. Disassemble the valve assembly as described in “Maintenance Proce-

dures”. Look for any foreign matter; commonly bits of Teflon® tape or
particulates carried into the valve system or crystallized residue from
previously pumped vapors. All of the above must be cleaned out and the
pump reassembled with clean or new parts.

Pump does not run - pump on/off switch is dark—

1. Check that power is being supplied to the pump from the power source

and the pump switch is in the on position.

2. An overcurrent or other problem may have blown the fuses. To check

fuses:

(Fuse holder located next to power socket)

WARNING

Shut off all power to pump before checking fuses. Unplug
pump’s power cord from electrical source.

3. Pull out the fuse holder while depressing the small tab, and determine if

the fuses are good. The proper replacement fuses should always be
used. Consult the nameplate, or call KNF Customer Service for the proper
rating and type of fuse.

Pump does not run - pump on/off switch is lit—

WARNING

Motor is thermally protected and will automatically restart unex­pectedly when overload device resets.

1. It is possible that the thermal protective device has activated. Turn off the
pump and let it cool for 15 minutes before trying again.

2. If the pump starts, determine the cause of the overload before using the
pump. Possible causes are:

- Electrical power source does not match motor requirements,

- Insufficient ventilation of the motor caused by blockage or dirt,

- Defective pump assembly or motor.

- Application is exceeding the pressure rating of the pump.

Maintenance Procedures

(Refer to exploded view)

Materials needed: Replacement kit(s)
Tool required: Small Phillips-head screwdriver, (2-head pump - small adjust-

able wrench,) marking pencil, mild solvent to clean residue from heads.

Cleaning or replacing valve plates, seal rings and diaphragms:

WARNING

Shut off all power before proceeding. Unplug pump’s power
cord from electrical source.

If you run into a problem or have a question regarding the following proce­dure, please call KNF Application Engineering for assistance.

1. Be sure pump is dry and free of hazardous materials by operating it for 5
minutes in free air.

2. Mark the relative position of the head parts with a pencil line to ensure
correct assembly later. It is not necessary to remove the optional pres­sure gauge, regulator assembly or hose barbs.

3. Remove the 4 perimeter head screws B on the pump head.

4. Lift the head assembly and rubber skirt straight up and place on a clean,
flat work surface.

To clean or replace the valve system within the head assembly:

(Note:

Certain models have auxiliary screws securing the headparts)

5. If supplied, unscrew the center screw(s) P located in the center of the
pump headplate A.

6. Carefully separate the headplate A from the intermediate plate C. Two
seal rings and two valve plates are now exposed.

7. Remove old seal rings E and valve plate D. Carefully clean any residue
from the valve seats with a mild solvent before proceeding. Do not