Welch 2019C-02 User manual

Operation Manual
(EN)
Translation of the german original manual
Diaphragm pumps
Models:
► 2019C-02
(230V / 50Hz)
► 2019B-01
(115V / 60Hz)
► 2019C-50
(230V / 50Hz)
2019
2017-02-08

Gardner Denver Thomas GmbH
Am Vogelherd 20
98693 Ilmenau
Germany
T [phone]
F [phone]
[e-mail]
www.welchvacuum.com
Customer Support [phone]
We are constantly working on the further development of all our product models.
Reprinting or reproduction of this manual, including extracts, is not allowed without the prior written permission of
Co. Gardner Denver Thomas GmbH.
All rights under the copyright laws are expressly reserved by Co. Gardner Denver Thomas GmbH.
We reserve the right to make changes and amendments.
Gardner Denver Thomas, Inc.
1601 Feehanville Drive
Suite 550
Mt. Prospect, IL 60056
USA
T [phone]
F [phone]
[email protected]
www.welchvacuum.com
For USA, Canada and other Americas

Contents
2019 3
Contents
1 Important Information ............................................................................................................. 4
1.1 General Information..................................................................................................................4
1.2 Target Groups...........................................................................................................................4
1.3 Intended Use.............................................................................................................................4
1.4 Use for an Unauthorized Purpose ............................................................................................4
1.5 Safety Devices..........................................................................................................................5
1.6 Meaning of the Warning notes..................................................................................................5
1.7 Product Standards, Safety Regulations....................................................................................5
2 Basic Safety Instructions ....................................................................................................... 6
2.1 General Information..................................................................................................................6
2.2 Electricity...................................................................................................................................6
2.3 Mechanical Systems.................................................................................................................6
2.4 Hazardous Substances.............................................................................................................7
2.5 High Temperatures ...................................................................................................................7
3 Description .............................................................................................................................. 8
3.1 Design.......................................................................................................................................8
3.1.1 Connections - Suction- / Pressure side ....................................................................................8
3.1.2 Connecting to the electricity supply ..........................................................................................8
3.1.3 Display - Vacuum Regulator.....................................................................................................9
3.2 Protection measures against liquids in the pump.....................................................................9
3.2.1 Condensate separator (Suction side) .......................................................................................9
3.2.2 Cold trap (Suction side) ............................................................................................................9
3.3 Areas of Application..................................................................................................................9
3.4 Materials of the medium-affecting pump parts........................................................................10
3.5 Scope of Delivery....................................................................................................................10
3.6 Accessories.............................................................................................................................10
4 Technical Data ....................................................................................................................... 11
5 Installation and Operation .................................................................................................... 12
5.1 Unpacking...............................................................................................................................12
5.2 Setting up and connecting ......................................................................................................12
5.2.1 Setting up................................................................................................................................12
5.2.2 Connecting..............................................................................................................................12
5.2.2.1 Electrical Connection..............................................................................................................12
5.2.2.2 Vacuum connection (Suction side) .........................................................................................12
5.2.2.3 Exhaust connection (Pressure side).......................................................................................13
5.3 Operation ................................................................................................................................13
5.3.1 Start-up ...................................................................................................................................13
5.3.2 Decommissioning....................................................................................................................13
5.4 Storage....................................................................................................................................13
5.5 Scrap Disposal........................................................................................................................13
6 Maintenance and Servicing.................................................................................................. 14
6.1 Maintenance Performed by the User......................................................................................14
6.1.1 Diaphragm replacement..........................................................................................................14
6.2 Maintenance by the Manufacturer ..........................................................................................16
6.3 Damage Report.......................................................................................................................16
7 Troubleshooting .................................................................................................................... 17
8 Spare Parts Overview ........................................................................................................... 18
8.1 Kit –Order numbers................................................................................................................18
8.2Diaphragm pump with vacuum regulator kit - 2019C-50 .....................................................18
8.3Spare parts view / Parts list ....................................................................................................19

Important Information
4 2019
1 Important Information
1.1 General Information
The Diaphragm Pumps conform to the following directives:
2006 / 42 / EC
Machinery Directive
2014 / 30 / EU
Electromagnetic Compatibility Directive
The CE sign is located on the rating plate.
Observe the binding national and local regulations when fitting the pump into installations!
1.2 Target Groups
This Operating Manual is intended for the personnel planning, operating and maintaining
Diaphragm Pumps.
This group of people includes:
Designers and fitters of vacuum apparatus
Employees working on commercial laboratory and industrial vacuum technology applica-
tions
Service personnel for Diaphragm Pumps
The personnel operating and maintaining the Diaphragm Pumps must have the technical
competence required to perform the work that has to be done.
The user must authorize the operating personnel to do the work that has to be done.
The personnel must have read and understood the complete Operating Manual before using
the Diaphragm Pumps.
The Operating Manual must be kept at the place of use and be available to the personnel
when required.
1.3 Intended Use
The layout of the Diaphragm Pumps must be appropriate for the conditions of use. The
user bears the sole responsibility for this.
The Diaphragm Pumps may only be operated under the conditions stated
in the "Technical Data" section,
on the type plate, and
in the technical specification for the order concerned.
Diaphragm Pumps are approved for extracting, pumping and compressing gases and va-
pours. If these gases and vapours are toxic or explosive, then the user must observe the
currently valid safety regulations for this application.
1.4 Use for an Unauthorized Purpose
It is forbidden to use the pump for applications deviating from the technical data stated on
the type plate or the conditions stated in the supply contract, or to operate it with missing or
defective protective devices.

Important Information
2019 5
1.5 Safety Devices
Measures such as the following are for the safety of the operating personnel:
electrical connection with a protective conductor (operating mode S1) and an earthing
plug
Motor protection device (thermal)
“Hot Surface" label on the pump - warning notice
The Diaphragm Pumps must not be operated without these elements.
1.6 Meaning of the Warning notes
Take note of the warning notices. They are each in the following box:
CAUTION ! / WARNING !
Hazard which may lead to serious injuries or material damage.
1.7 Product Standards, Safety Regulations
Diaphragm Pumps meet the following product standards:
DIN EN ISO 12100:2011-03
Safety of machinery -
General principles for design - Risk assessment and risk reduction
DIN EN ISO 13857:2008-06
Safety of machinery - Safety distances to prevent hazard zones being reached
by upper and lower limbs
DIN EN 1012-2:2011-12
Compressors and Vacuum pumps - Safety requirements -
Part 2: Vacuum pumps
DIN EN ISO 2151:2009-01
Acoustics - Noise test code for compressors and vacuum pumps - Engineering
method (grade 2)
DIN EN 60204-1:2014-10
Safety of machinery - Electrical equipment of machines -
Part 1: General requirements
DIN EN 61000-6-2:2011-06
DIN EN 61000-6-4:2011-09
Electromagnetic compatibility (EMC) -
Part 6-2: Generic standards - Immunity for industrial environments
Part 6-4: Generic standards - Emission standard for industrial environments
DIN EN 61010-1/A1:2015-04
Safety requirements for electrical equipment for measurement, control and
laboratory use - Part 1: General requirements
DIN EN 50110-1:2014-02
Operation of electrical installations
Directive 2012/19/EU
Electrical and electronics - old devices (WEEE)
Directive 2011/65/EU
Dangerous materials in electrical and electronics devices (RoHS II)
China – RoHS II
Environment protection law - China 2016-01
The following additional safety regulations apply in the FR Germany:
BGV A3
Electrical equipment and operating materials
VBG 5
Power-driven machines
BGR 120
Guidelines for laboratories
BGI 798
Hazard assessment in the laboratory
BGG 919 (VBG 16)
Accident prevention regulations for "compressors"
BGR 189 (BGR 195;192;197)
Use of protective working clothes
Observe the standards and regulations applying in your country when you use the Dia-
phragm Pumps.

Basic Safety Instructions
6 2019
2 Basic Safety Instructions
2.1 General Information
Warning notices must be observed. Disregarding them may lead to damage to health and
property.
The Diaphragm Pumps must be operated by personnel who can detect impending dangers
and take action to prevent them from materialising.
The manufacturer or authorized authorised workshops will only service or maintain the Dia-
phragm Pumps if it is accompanied by a fully completed damage report. Precise information
about the contamination (also negative information if necessary) and thorough cleaning of
the Diaphragm Pumps are legally binding parts of the contract.
Contaminated Diaphragm Pumps and their individual parts must be disposed of in accor-
dance with the legal regulations.
The local regulations apply in foreign countries.
2.2 Electricity
The Diaphragm Pumps of operation mode S1 are supplied. When the location of operation
mode S1 devices is changed, please note that the testing must be repeated in accordance
with DIN EN 0105, DIN EN 0702 and BGV A2.
The local regulations apply in foreign countries.
Please note the following when connecting to the electrical power supply system:
The electrical power supply system must have a protective connector according to DIN
VDE 0100-410 (IEC 60364-4-41).
The protective connector must not have any breaks.
The connecting cable must not be damaged.
2.3 Mechanical Systems
Improper use can lead to injuries or material damage. Observe the following instructions:
Only operate the pumps with hoses of the specified dimensions.
The maximum permissible pressure of 1 bar at the suction connection must not be ex-
ceeded.
Hazardous substances must be separated out as far as this is technically possible before
they reach the pump.
External mechanical stresses and vibrations must not be transmitted to the pump. Only
use flexible laboratory hoses for connecting pumps.
The overpressure generated at the pressure port must not exceed 1 bar.
The pump must not be used to suck up fluids. Lay the exhaust pipe so that it slopes
downwards, so allowing condensate to flow out of the pump. Collect the condensate and
dispose of it in an environmentally compatible manner.
Prevent dyes exuding.
Maintain a space of least 20 mm between the pump and adjacent parts in order to enable
the pump to cool.
CAUTION !
Solid particles in the pumping medium impair the pumping action and can lead to
damage. Prevent solid particles penetrating into the pump.

Basic Safety Instructions
2019 7
2.4 Hazardous Substances
ACHTUNG !
The operating company bears the responsibility for the use of the Diaphragm
Pumps.
Hazardous substances in the gases to be pumped can cause personal injuries and
property damage. Pay attention to the warning notices for handling hazardous sub-
stances.
The local regulations apply in foreign countries.
Combustible, aggressive and explosive Gases
Don’t pump combustible, especially aggressive or explosive gases or vapors or operate this
pump in an atmosphere containing combustible or explosive gases or vapors.
Examine before switching on whether that can form gas combustible gas/air mixtures which
can be promoted! Consider the regulations of the guideline 1999/92/EC.
The Diaphragm Pumps are not certified according to ATEX guidelines 2014/34/EU.
The Diaphragm Pumps are not recommended for pumping acidic, basic or organic vapors.
Poisonous Gases
Use a suitable separator when pumping poisonous or harmful gases. Prevent such sub-
stances from leaking out of the appliance or pump. Treat these substances according to the
applicable environmental protection regulations.
Test the strength and leak-tightness of the connecting lines and the connected apparatus.
Prevent environmental poisons, e.g. mercury, getting into the pumps.
Fulfil the requirements, for example:
German Hazardous Substances Regulation (GefStoffV) of 01. December 2010
Regulation 2016/1179/EU
(Classification, Packaging and Labelling of hazardous substances),
Manufacturer's safety data sheets on hazardous substances.
2.5 High Temperatures
The Diaphragm Pumps may heat up as a result of the temperature of the gas being pumped
and through compression heat.
Prevent the following maximum permissible temperatures from being exceeded.
+ 40 °C for the environment, and
+ 60 °C for the gas to be pumped.
The electric motor has a thermal overload protection.

Description
8 2019
3 Description
3.1 Design
3.1.1 Connections - Suction- / Pressure side
►Suction side - Connection:
Hose nozzle DN 8 (1)
►Pressure side - Connection:
Exhaust silencer (2)
or hose nozzle DN 8
►Suction side - Connection:
Vacuum Regulator - Kit (3)
with separator and display
With the help of suction-side
mounted Regulator-Kit it is
possible to regulate the final
pressure of the pump.
You can see the actual pressure
at the manometer.
3.1.2 Connecting to the electricity supply
The Diaphragm Pumps are supplied with complete electrical wiring.
It is connected via a mains connection cable and a power plug. Mains connection cable and
plug must comply with the requirements of the line disconnection devices (current, output).
Motor is provided with a thermal overload protection ex works, protecting the vacuum pump
from damage or destruction, respectively.
WARNING !
Should the user change the electrical connection, for example for fitting into a sys-
tem, then this may only be performed by a electrical specialist under observance of
the accident prevention regulations.
Vacuum
connection
Suction side (1)
Exhaust
connection
Pressure side (2)
(3)

Description
2019 9
3.1.3 Display - Vacuum Regulator
The Vacuum Regulator shows pressures at below atmospheric pressure.
The reference point for the gauge is atmospheric pressure.
WARNUNG !
Please keep in mind that the barometric pressure changes from day to day.
This also changes the displayed pressure values because of latent air pressure
fluctuations.
3.2 Protection measures against liquids in the pump
3.2.1 Condensate separator (Suction side)
If the possibility of penetration of larger liquid quantities, we recommend the additional instal-
lation of a larger collection vessel (eg. Woulff bottle).
3.2.2 Cold trap (Suction side)
The installation of an appropriate cold trap is required when a larger amount of steam (water,
solvent) is obtained which exceeds the tolerance of the vapor pump.
The refrigerant used is usually dry ice or dry ice mixture with an acetone or alcohol.
Maintenance:
The refrigerant must have the highest possible level in the cold trap.
The rise in pressure in the connected vacuum apparatus indicates that the cold trap is satu-
rated.
For cleaning remove the cold trap and defrost. The condensate must be disposed of prop-
erly. The cool trap is, if applicable, clean with a detergent and dry.
3.3 Areas of Application
The Diaphragm Pumps are intended to:
Pumping and compressing neutral and aggressive gases and vapours.
Generating a vacuum down to a minimum ultimate pressure of 200 mbar.
Use in physical and chemical laboratories in trade and industry.
Use for vacuum filtration, vacuum drying, glove boxes, vacuum ovens and other vacuum
technology applications.

Description
10 2019
3.4 Materials of the medium-affecting pump parts
Component
Materials
Seal
EPDM
Hose nozzle
PVDF
Piston cup seal
PTFE - Compound
Pump head
Aluminium with corrosion protection
Separator vessel
Plastic
3.5 Scope of Delivery
The scope of delivery is specified in the supply contract.
3.6 Accessories
Figure
Designation / Usage
Order no.
Inline filter, hydrophobic
Pore size: 0.22 µm
To protect the pump against fine dust and
aerosols.
Installation in the suction line, as shown.
112555-04
Vacuum hose red, rubber
18 / 8 x 5 mm
For vacuum applications between pump and
apparatus.
828310-4
PVC-Fabric hose
8 x 3 mm
For compressor- and vacuum applications as
exhaust air- and suction line.
828346
Hose clamp
Clamping range 8 –16 mm
For fixing and sealing of PVC fabric hose.
826011-9

Technical Data
2019 11
4 Technical Data
Parameter
Unit
2019B-01
2019C-02
Pumping speed 50/60 Hz
at atmospheric pressure
m3/ h
1.9 / 2.3
l / min
31 / 37
Ultimate pressure
mbar
200
Suction connection
-
Hose nozzle DN 8
for hose inside diameter 8 mm
Pressure connection
Hose nozzle DN 8
for hose inside diameter 8 mm
and Exhaust silencer
Ambient temperature
°C
+ 10 to + 40
Max.
Operating gas temperature
+ 60
Voltage / Frequency
V / Hz
115 / 60
230 / 50
Type of protection
DIN EN 60529
-
IP 20
Weight
kg
5.6
6.1
6.5
Dimensions (W/D/H)
mm
224 / 127 / 224
264 / 127 / 224
Order No. for:
-
- Diaphragm pump
inclusive mains connection
cable with plug US
2019B-01
-
- Diaphragm pump
inclusive mains connection
cable with plug CEE
-
2019C-02
- Diaphragm pump
inclusive mains connection
cable with plug CEE
and vacuum regulator - Kit
-
2019C-50
The information presented in this material is based on technical data and test results of nominal units. It is believed
to be accurate and reliable and is offered as and aid to help in the selection of products.
It is the responsibility of the user to determine the suitability of the product for the intended use and the user as-
sumes all risk and liability whatsoever in connection therewith. Gardner Denver Thomas GmbH does not warrant,
guarantee or assume any obligation or liability in connection with this information.

Installation and Operation
12 2019
5 Installation and Operation
5.1 Unpacking
Carefully unpack the Diaphragm Pump.
Check the pump for:
Transport damage,
Conformity with the specifications of the supply contract (model, electrical supply data),
Completeness of the delivery.
Please inform us without delay if there are discrepancies between the delivery and the con-
tractually agreed scope of delivery, or if damage is detected.
Please take note of the general terms of business of the manufacturing firm.
In case of a claim under warranty, the device must be returned in packaging that is
suitable for protecting it during transport.
5.2 Setting up and connecting
5.2.1 Setting up
Set the pump on a flat and horizontal surface.
Remove the protective caps on the suction and pressure ports.
Note that the cooling of the pump is guaranteed, see chapter 2.3.
Note that on the installation location no moisture acts on the pump.
5.2.2 Connecting
5.2.2.1 Electrical Connection
Before the electrical connection of the pump review the specifications on the nameplate
with the existing electrical connection conditions, see chapter 2.2.
CAUTION !
The electric motor has a thermal overload protection.
After triggering the protective fuse after a certain cooling occurs an auto restart
(Reset) the motor.
5.2.2.2 Vacuum connection (Suction side)
The vacuum connection (suction port) consists of a hose nozzle DN 8.
Suitable vacuum lines are available:
Thick-walled rubber vacuum hose 8 x 5 mm hose nozzle DN 8.
PVC fabric hose and hose clamp 8 x 3 mm clamping range 8 - 16 mm.
Make sure that the vacuum line is kept as short as possible from the pump to the appara-
tus.

Installation and Operation
2019 13
5.2.2.3 Exhaust connection (Pressure side)
The exhaust connection (pressure port) also consists of a hose nozzle DN 8.
Thick-walled rubber vacuum hose 8 x 5 mm hose nozzle DN 8.
PVC fabric hose and hose clamp 8 x 3 mm clamping range 8 - 16 mm.
5.3 Operation
CAUTION !
Observe the basic safety instructions when using the Diaphragm Pump,
chapter 2.
5.3.1 Start-up
Make sure that when you start the pump, which may arise in the connection lines con-
densates, cannot penetrate into the pump.
►Action: additional suction side condensate separator
Always try to avoid aspiration of foreign body particles!
►Action: suction side inline filter
The Diaphragm pump is switched on the power switch.
It is recommended to let the pump run for a few minutes before use. The warm-up im-
proves the eligibility of the pump.
5.3.2 Decommissioning
If vacuum applications with special steam load, the pump needs to run after the process
with an open vacuum port about 2 minutes and rinsed with atmospheric air.
This measure is used to cleaning the pump chamber and minimizes the corrosive attack
wetted material pump parts.
The Diaphragm pump is switched off using the power switch.
5.4 Storage
The pumps are to be stored in a low-dust, interior room within the temperature range from
+ 5 to + 40 °C and at a relative air humidity < 90%.
Leave the protective elements on the suction and pressure ports. Another equally good pro-
tection may be used.
5.5 Scrap Disposal
CAUTION !
The Diaphragm Pumps must be disposed of in accordance with the 2012/19/EU
guideline and the specific national regulations.
Contaminated Diaphragm Pumps must be decontaminated according to the laws.

Maintenance and Servicing
14 2019
6 Maintenance and Servicing
Diaphragm Pumps are 100% oil-free.
All bearings are sealed and permanently lubricated.
6.1 Maintenance Performed by the User
WARNING !
Only perform the work that is described here, and that which is permitted to be done
by the user.
All other maintenance and service work may only be performed by the manufacturer
or a dealer authorized by him.
Beware of the pump parts being possibly contaminated by hazardous substances.
Wear protective clothing if there is contamination.
Renew defective parts, if necessary! Do not clean with compressed air!
Check the pump daily for unusual running noises and heat building up on the surface of
the pump.
Check the electrical and vacuum connections daily.
6.1.1 Diaphragm replacement
Disassembling the diaphragms:
Disconnect power.
Note: Observe the position of
the air intake port (B) and exhaust
port (A) before disassembly.
Remove the six screws from head
(with handle) and place the head
with the screws aside.
Remove the four screws from
valve plate and remove them.
Now remove the diaphragm with
the PTFE diaphragm liner and
discard it.
Reassembling the diaphragms:
Wipe top of connecting rod clean
with a soft clean cloth.
Place new diaphragm with PTFE-
diaphragm liner on top of connect-
ing rod. Line up the holes in the
diaphragm and liner with the
screw holes in connecting rod.
Screw the four screws crosswise
with a torque of 3 - 4 Nm.

Maintenance and Servicing
2019 15
WARNING !
To prevent damage to the pump, never apply any sealant or lubrication to the gasket.
Valve plate replacement:
Wipe inside of head clean. Install
new gasket if needed, be sure to
remove any excess gasket.
Replace valve plate in head.
Chamfer side of valve plate should
face you. Insert four new screws.
Screw the four screws crosswise
with a torque of 3 - 4 Nm.
Reassembling the pump:
Place the head (with handle) on
the pump casing, observing the
position of the air intake port (B)
and exhaust port (A).
Note: Make sure the diaphragm
is seated properlyin the well of
the pump casing and head. Do
not pinch the diaphragm or liner.
Insert the screws on the head
(with handle).
Do not completely tighten the
screws yet.
Now screw the four screws
crosswise with a torque of
5 - 6 Nm.

Maintenance and Servicing
16 2019
6.2 Maintenance by the Manufacturer
Repairs and maintenance going beyond the extent of the work described in chapter 6.1 or
reconditioning or modification may only be performed by the manufacturer or authorized
workshops.
WARNING !
The user shall be liable for the consequences of an incorrect damage report or a
contaminated pump. The statements in the damage report are legally binding.
6.3 Damage Report
You find the form of the damage report to the Download on our web page in the menu "ser-
vice" and "Downloads". www.welchvacuum.com
If you should not have an entrance to the Internet, you can request the form also gladly with
us, under phone [phone].
WARNING !
Incomplete or incorrectly completed damage reports may endanger the service per-
sonnel!
Give full information in the damage report, in particular regarding a possible con-
taminating.

Troubleshooting
2019 17
7 Troubleshooting
During the warranty period, intervention in the Diaphragm Pumps and accessory compo-
nents may only be made by manufacturing firm.
Trouble
Cause
Remedy
by:
with:
Pump does
not start
No power supply
Qualified
electrician
Check electrical installation
Motor defective
Service
workshop
Exchange
Pump does
not generate
a vacuum or
overpressure
Connected apparatus
and/or
connecting elements
leaking
User or
Service
workshop
Identify and seal the leak,
replace the seals and/or
hoses if necessary.
Pump leaking
Exchange the hoses
and/or fittings if necessary.
Pump dirty
General maintenance /
Cleaning
Valve plate or
diaphragm defective
Exchange, see chapter 6.1.1
Valve plate dirty
Cleaning condensates
and foreign objects out of
the valves.
Seals / diaphragms
dirty
Cleaning or exchange
Loose screws
User
Tighten the screws
Separator container
is full
Empty the separate container
Running
noise
Pump dirty
User or
Service
workshop
General maintenance /
Cleaning
Valve plate, diaphragm,
seals defective or dirty
User
Exchange or cleaning
loose screws
or connectors
Tighten the screws
and / or connectors
Cable
defective and/or brittle
Qualified
electrician
Exchange of the cable

Spare Parts Overview
18 2019
8 Spare Parts Overview
The Spare parts- and Kit lists contain all the parts and all the information necessary for or-
dering. When ordering, please quote the description, quantity, serial number and order num-
ber!
CAUTION !
We are not liable for any damage caused by the installation of any parts not supplied
by the manufacturer.
8.1 Kit – Order numbers
Diapragm pumps
Models:
Diaphragm
Replacement Kit
Pump head and
Rebuild Kit
Foot Kit
Order no.
Order no.
Order no.
2019B-01
2019C-02
2019C-50
2019K-01
2019K-03
2019K-04
8.2 Diaphragm pump with vacuum regulator kit - 2019C-50
Item
Description
Piece
Order no.
-
Vacuum Regulator Kit, consisting of:
1
404022
A
- Manometer 1/8“ (mbar/kPa) brass
1
U726024
B
- Extension PP, G1/4” – G1/4”
1
400779-6
C
- Reducing nipple PVDF, G 1/8” – G ¼”
1
450527
D
- Grub screw
1
U624327
E
- Regulator
1
U662455-50
F
- Regulator - Rotation upper part
1
U641230
G
- Hose nozzle PP, DN 6 –G ¼”
1
710631-01
H
- Plastic separator (38/69)
1
U61-4613
J
- Gasket washer FKM (40/30/3)
1
828875-5
E
D
A
G
H;J
B;C
F

Spare Parts Overview
2019 19
8.3 Spare parts view / Parts list
Item
Spare parts description
2019K-01
2019K-03
2500K-04
1
Diaphragm, Buna N
1
1
-
2
PTFE Diapragm liner
1
1
-
3
Diaphragm hold down plate
-
1
-
4
Valve platte Assembly
-
*
-
5
O-Ring Gasket, Head
1
*
-
6
* Pump head includes item 4 and 5
-
1
-
7
Haed screws
-
4
-
8
Handle screws
-
2
-
9
Diaphragm hold down plate screws
4
4
-
10
Hose nozzle DN 8
PVDF 1/8” NPT x 1/4” ID Hose
-
2
-
11
Rubber suction cup feet
-
-
4