TKM K Series User manual

K SERIES
PLUNGER
PUMP
KP Pump Installation and Operating
Instructions Manual
TKM LLC
1059 Triad Court, Suite 1
Marietta, GA, USA, 30062
[phone]

TKM K Series Metering Pumps Operation Manual
KP OM v.1.8 Copyright © 2018 TKM LLC All Rights Reserved 2
Table of Contents
1. INTRODUCTION TO TKM K SERIES METERING PUMPS ................................................................ 5
1.1 DESCRIPTION OF TERMS................................................................................................................................................ 5
1.2 GENERAL INFORMATION................................................................................................................................................ 5
2. SAFETY INSTRUCTIONS AND GUIDELINES..................................................................................... 6
2.1 QUALIFIED PERSONNEL AND TRAINING ...................................................................................................................... 6
2.2 SAFETY PRECAUTIONS DURING MAINTENANCE,SERVICING,AND INSTALLATION................................................. 6
2.3 NEGLECTING THE SAFETY INSTRUCTIONS.................................................................................................................... 7
2.4 IMPORTANCE OF TKM AUTHORIZED SPARE PARTS................................................................................................... 7
2.5 INTENDED USE FOR THE TKM PUMP........................................................................................................................... 7
2.6 PERSONAL PROTECTION EQUIPMENT FOR INSTALLATION AND MAINTENANCE.................................................... 8
3. MANUFACTURER’S WARRANTY...................................................................................................... 8
4. GENERAL DESCRIPTION OF TKM K SERIES PLUNGER PUMP ....................................................... 9
4.1 KP PLUNGER PUMP MODELS ....................................................................................................................................... 9
4.1.1 The Standard KP Pump....................................................................................................................................... 9
4.1.2 The High-Pressure KP Pump ...........................................................................................................................10
4.1.3 The Low-Flow KP Pump....................................................................................................................................10
4.1.4 The High Viscosity KP Pump ...........................................................................................................................10
4.2 KP PLUNGER PUMP STANDARD FEATURES...............................................................................................................10
5. RECEIVING AND STORING A TKM PUMP ..................................................................................... 10
5.1 RECEIVING INSPECTION................................................................................................................................................11
5.2 STORING A TKM PUMP...............................................................................................................................................11
6. TECHNICAL DATA............................................................................................................................ 12
6.1 SPECIFICATIONS ............................................................................................................................................................12
6.2 KP PUMP DIMENSIONS ...............................................................................................................................................13
6.3 TEMPERATURE...............................................................................................................................................................13
6.4 NOISE LEVELS................................................................................................................................................................13
6.5 PUMP NAME PLATE NOTATION .................................................................................................................................14
6.6 KP STANDARD COMPONENTS....................................................................................................................................15
6.7 KP GEAR OIL.................................................................................................................................................................16
7. INSTALLATION ................................................................................................................................ 16
7.1 MOUNTING A TKM PUMP ..........................................................................................................................................16
7.2 CONNECTING THE SUCTION PIPING...........................................................................................................................17
7.2.1 Suction Line Filters..............................................................................................................................................19
7.3 CONNECTING THE DISCHARGE PIPING ......................................................................................................................20
7.3.1 Pressure Relief Valve ..........................................................................................................................................20
7.3.2 Pulsation Dampener...........................................................................................................................................21
7.3.3 Back Pressure Valve or Anti-Siphoning Mechanism................................................................................21
7.4 RECOMMENDED CONFIGURATION FOR TKM KP PUMP SYSTEM ..........................................................................23
7.5 FLUSHING THE LIQUID END.........................................................................................................................................23

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8. PUMP COMPONENTS ..................................................................................................................... 24
8.1 THE GEAR BOX..............................................................................................................................................................24
8.2 STROKE LENGTH ADJUSTMENT...................................................................................................................................24
8.2.1 Adjusting the Stroke Position ..........................................................................................................................25
8.3 THE LIQUID END ...........................................................................................................................................................25
8.3.1 The Check Valves.................................................................................................................................................26
8.3.2 The Plunger and Packing..................................................................................................................................27
8.3.3 Replacement Parts and Repair Kits...............................................................................................................27
8.3.4 Repair Kit Contents.............................................................................................................................................28
8.4 THE ELECTRIC MOTOR .................................................................................................................................................30
8.4.1 Configuring the Electric Motor........................................................................................................................30
9. STARTUP .......................................................................................................................................... 31
9.1 STARTING A TKM PUMP .............................................................................................................................................31
10. SERVICING A TKM KP PUMP...................................................................................................... 32
10.1 REBUILDING THE CHECK VALVES ................................................................................................................................33
10.1.1 Removing the Guides and Seats................................................................................................................33
10.1.2 Replacing the Guides and Seats ................................................................................................................33
10.2 REPLACING THE STANDARD KP PLUNGER PACKING................................................................................................34
10.3 REPLACING THE HIGH-PRESSURE PLUNGER PACKING.............................................................................................36
10.4 CHANGING THE GEAR OIL...........................................................................................................................................38
10.5 TROUBLESHOOTING THE TKM KP PUMP..................................................................................................................39
10.6 RETURNING THE TKM PUMP FOR REPAIRS...............................................................................................................42
10.6.1 Preparing the TKM Pump for Returns .....................................................................................................42
10.6.2 RMA for TKM Pump Return.........................................................................................................................43
11. CONTACTING TKM LLC............................................................................................................... 43
Table of Figures
Figure 1 - Avoid irregular piping when connecting the suction line .....................................................18
Figure 2 - Avoid debris from bottom of reservoir tank ..............................................................................18
Figure 3 - Always run piping through walls or barriers ..............................................................................18
Figure 4 - Avoid rounded tubing in suction line to prevent air in suction line..................................19
Figure 5 - Correctly integrating a Y-strainer on the suction line.............................................................19
Figure 6 - Using a foot valve with a strainer when suction line runs into reservoir tank ...............20
Figure 7 - PRV and recycling line ........................................................................................................................20
Figure 8 - Pulsation dampener and back pressure valve ...........................................................................21
Figure 9 - Using a back pressure valve to avoid unwanted siphoning .................................................22

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Figure 10 - Recommended configuration for TKM Pump system ..........................................................23
Figure 11- The adjustment knob.........................................................................................................................25
Figure 12 - Correct orientation for discharge valve .....................................................................................34
Figure 13 - Correct orientation for suction valve ..........................................................................................34
Figure 14 - KP Standard Pump Liquid End ......................................................................................................36
Figure 15 - KP High-Pressure Pump Liquid End ............................................................................................38
Figure 16 - Oil plug locations...............................................................................................................................38
Copyright Notice
This Operating Instructions Manual and all the technical information provided is
property of TKM LLC. This document is protected by U.S. and International copyright
laws. Reproduction, modification, or distribution of the manual without written
permission from TKM LLC is prohibited.
Copyright © 2016-2018 TKM LLC All Rights Reserved

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KP OM v.1.8 Copyright © 2018 TKM LLC All Rights Reserved 5
1. Introduction to TKM K Series Metering Pumps
This instruction manual is to provide the end user with an extensive understanding of TKM
Metering Pumps. The information provided in these instructions includes important guidelines
for the safe and successful installation, operation, and maintenance of TKM K Series Plunger
Metering Pumps.
The instructions and additional information outlined in this document must be integrated into
the current rules and regulations in the location of installation. The instructions in this manual
DO NOT replace any company or plant regulations or requirements which have been issued for
safety purposes.
1.1 Description of Terms
To prevent ambiguity and possible misinterpretation of information, the following technical
description of users and personnel have been defined and assigned a common term, which will
be referred to hereafter. The following terms are only a few of the most common terms used
in the entire manual.
•Manufacturer –Refers to TKM LLC
•End User –Refers to the company, whether through a distributor or directly, that
purchases the TKM Metering Pump for their own private use
•Distributor –A third-party company acting between the Manufacturer and the End User
that focuses exclusively on purchasing TKM Pumps for redistribution
•Representative –A third-party company acting on behalf of TKM LLC. These
companies can repair, service, and offer advice to End Users
•Qualified Personnel –Pump operators, technicians, installers, or maintenance staff who
have undergone the appropriate training necessary to handle TKM Metering Pumps
1.2 General Information
The following instruction manual covers the operation, maintenance, and storage of TKM
Metering Pumps. Correctly following the guidelines presented in this manual will help to:
•Avoid dangers to company personnel, machinery, and the working environment.
•Ensure the longevity of the TKM Metering Pump and the performance of the system.
•Reduce the need for repairs due to mishandling the product.
TKM Metering Pumps are intended for operation in industrial areas and thus are not
considered retail products. The End User must take corresponding accident prevention

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measures to protect Qualified Personnel from danger while operating, repairing, and handling
TKM products.
This document contains information intended for Qualified Personnel
only. Carefully read the instructions in this manual before using TKM
Metering Pumps. Please keep these instructions for future use.
TKM LLC reserves the right to update or modify the design, features, and components of KP
Pumps. The information contained in this instruction manual is thus subject to change without
notice.
This document and all the technical information provided is property of TKM LLC.
Unauthorized reproduction, modification, or distribution without written consent from
TKM LLC is punishable by law.
2. Safety Instructions and Guidelines
The following safety instructions will assist Qualified Personnel with handling the TKM
Metering Pump in a safe manner.
2.1 Qualified Personnel and Training
The personnel for operation, maintenance, inspection, and installation must be qualified for
their tasks. The End User must clearly define the responsibilities of personnel and organize
their supervision.
The End User is solely responsible for the appropriate training of company personnel and for
assuring that personnel are qualified for the needed work. It is never appropriate nor
acceptable for untrained personnel to handle any TKM product.
In the case that the End User requires the appropriate training for company staff, the
Manufacturer, Distributor, or Representative can provide the necessary training services.
2.2 Safety Precautions during Maintenance, Servicing, and Installation
It is the End User’s responsibility to ensure that only Qualified Personnel who have read and
understood the operating instructions for TKM Metering Pumps are allowed to service the TKM
equipment.
Only TKM spare parts should be used to repair valves or other parts of the TKM Pump.

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When servicing the connections on the TKM Pump, always confirm
that the connections are not under any pressure. Servicing a TKM
Pump under pressure may result in injury to staff and damage to
equipment.
2.3 Neglecting the Safety Instructions
Neglecting the safety instructions may cause danger to company personnel, environmental
hazards, and damage to the TKM Metering Pump or other TKM products.
Dangers resulting from safety negligence may include:
•Product failure
•Bodily harm from mechanical or chemical malfunctions
•Environmental hazards from chemical leaks and pipeline bursts
2.4 Importance of TKM Authorized Spare Parts
Modification of the TKM Pump is not permitted. Repair of the TKM Pump Liquid End is only
permitted after authorization from TKM LLC. Only genuine spare parts approved by TKM may
be used to service the pump. The use of non-TKM replacement parts will immediately
terminate the warranty. See section 3. Manufacturer’s Warranty for more information.
TKM authorized parts are essential for the safe performance of the TKM Pump. Using any parts
unauthorized by TKM LLC may result in serious injury to staff or damage to the TKM Pump.
2.5 Intended Use for the TKM Pump
The TKM Metering Pump or system is only to be used in accordance with the product
description. The End User must honor the specified working conditions of the pump stated in
section 6. Technical Data:
•Liquid End material
•Working pressure of the pump
•Appropriate atmospheric temperature
•Appropriate motor voltage and power
If the TKM Pump is to be used for other applications not previously discussed with TKM LLC,
the End User must consult with TKM before initiating the new process.

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2.6 Personal Protection Equipment for Installation and Maintenance
The End User is solely responsible for providing their Qualified Personnel with the appropriate
personal protection equipment (PPE) necessary for safely installing and servicing TKM Metering
Pumps.
When servicing the TKM Pump, always adhere to the safety regulations needed for the
pumped chemical.
3. Manufacturer’s Warranty
TKM Metering Pumps, as well as other TKM products, are under a manufacturer’s warranty for
a period of two years (24 months) from the Manufacturer’s shipping date. The warranty covers
replacement, free of charge, of any defective components deemed unsuitable by the TKM
technical office.
This warranty is not valid in the following cases:
•Components subject to normal wear, i.e.:
oValve assemblies
oO-rings, seals, gaskets included in valve assemblies
oPlunger packing
oBearings
•Using unauthorized replacement parts for the TKM Pump
•If the installation or use do not meet the technical conditions of the sale confirmation
•Improper installation of the TKM Pump or not following the installation instructions
(refer to section 7. Installation for full installation procedures)
•Disassembling the TKM Pump
•Tampering with the TKM Pump
•If the End User sells the pump to another party
•Faulty or careless handling i.e. dropping the TKM Pump
The TKM Pump should only be serviced for routine maintenance of
the Liquid End and valve components. DO NOT attempt to repair a
TKM Pump under warranty, and DO NOT attempt to disassemble a
TKM Pump under warranty if the TKM Pump is malfunctioning from
any component other than the Liquid End.

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Disregarding this notice will result in immediate termination of the manufacturer’s
warranty.
TKM LLC reserves the full right to determine the warranty coverage of a defective TKM
Metering Pump or TKM product. All obligations and liabilities under this warranty are limited
to repairing the TKM Pump, replacing the TKM Pump, or refunding the original purchaser, who
may be the End User or the Distributor, but not both, up to the full purchase price. TKM LLC
shall not be held responsible for any removal or replacement cost, or any additional
consequential damages.
4. General Description of TKM K Series Plunger Pump
The K Series Plunger Metering Pump is a mechanically actuated spring return pump, which falls
into the category of controlled volume alternative displacement pumps.
The KP Pumps include three variations: standard, high pressure, and high viscosity. The
technical data provided in this instruction manual is equally applicable (unless otherwise noted)
for any KP model pump.
KP Pumps are characterized by a plunger Liquid End, which has been engineered to operate in
constant low pressure or high pressure, and in low flow applications while maintaining a
continuous discharge flow.
4.1 KP Plunger Pump Models
The TKM KP Plunger Metering Pump exists in four distinct models, which are described in the
sections below. Each model is designed for a specific application depending on the
requirements provided by the End User.
4.1.1 The Standard KP Pump
The Standard KP Pump is designed and manufactured for use with non-aggressive chemicals.
This pump is built to withstand a maximum pressure of 600 PSI (40 BAR). Fitted with a SAF
2205 duplex steel plunger, and PTFE Chevron Packing, the KP Pump is easy to service and
inexpensive to repair.
The Liquid End and the check valves are made entirely of 316L stainless steel.

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4.1.2 The High-Pressure KP Pump
The High-Pressure KP Plunger Pump (KP HP) is designed for applications reaching a working
pressure of 1500 PSI (100 BAR). Fitted with a SAF 2205 duplex steel plunger and braided ring
packing composed of PTFE and Kevlar, the High-Pressure KP Pump is manufactured for the
toughest applications where a constant high pressure has to be maintained.
4.1.3 The Low-Flow KP Pump
The Low-Flow KP Plunger Pump (KPL) is used for applications that require consistently low
flows at high pressures. With flowrates ranging from .14 GPH (.5 LPH) to .41 GPH (1.6 LPH), the
KPL is designed for extremely accurate dosing.
Being a KP HP variant, the KPL Pump is fitted with a SAF 2205 duplex steel plunger, and PTFE
and Kevlar packing. The KPL can reach a maximum working pressure of 1500 PSI (100 BAR).
4.1.4 The High Viscosity KP Pump
The High Viscosity KP Plunger Pump (KP HV) is fitted with a Single Valve system and
engineered for pumping fluids with a viscosity of up to 55,000 centipoises. The KP HV can
reach a maximum working pressure of 600 PSI (40 BAR).
4.2 KP Plunger Pump Standard Features
Every KP Plunger Pump is shipped from TKM LLC with the following technical features:
•Anodized cast aluminum housing, yoke, and motor flange
•Powder coated aluminum castings in a deep red color (other colors available upon
request)
•Stainless steel Liquid End
•Stainless steel check valves
•Stainless steel hardware
5. Receiving and Storing a TKM Pump
All TKM Metering Pumps and TKM products are shipped from TKM LLC in excellent condition
after undergoing thorough testing. TKM LLC carefully assembles each pump to the specified
needs of the End User. The pump should only be used for the application intended and agreed
to with TKM LLC.

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Every pump that is distributed from TKM LLC is properly packaged in order to withstand
normal shipping and handling conditions. Please refer to the section 5.1 Receiving
Inspection for the proper course of action when receiving a TKM Pump.
TKM LLC sends every K Series Metering Pump in excellent condition. Every pump is shipped as
follows:
•Ready for immediate installation for the application specified in the purchase order
•Thoroughly tested to meet the internal specifications of the pump
•Anodized and powder coated to ensure maximum protection against aggressive
chemicals and harsh environments
•Filled with gear oil to the correct functioning level
5.1 Receiving Inspection
The End User should inspect the goods immediately upon receipt and ensure that:
•The products correspond to the purchase order
•Packaging and products have not been damaged or tampered with during transport
•The pump has been received in excellent condition
•All of the accessories or spare parts are present
In the event that the product has been damaged on delivery,
immediately issue a complaint with the courier and inform TKM. If
possible, photograph the damage for documentation purposes.
5.2 Storing a TKM Pump
If the TKM Pump is not used immediately, the End User should store the pump in a dry, clean,
and weatherproof environment. To prevent soil moisture, it is best to place the pump off of
the ground on a shelf or on wooden pallets. Ensure that the temperature of the storage
location is between 34°F (1°C) and 120°F (50°C).
To prevent serious injury and damage to the TKM Pump, do not stack multiple pumps
together and do not stack anything on the individual pump packages. Ensure that the shelf or
alternative location where the pumps are stored can support the weight of the pumps.
Before putting the pump into operation, make sure the pump is at the correct working
temperature (see section 5.2 Temperature for full details) before startup.

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Only Qualified Personnel should be responsible for the storage of
the TKM Pumps. Always check the dimensions and weight of the
TKM Pump before handling or lifting.
6. Technical Data
The main housings for KP Pumps are constructed of cast aluminum. The aluminum castings
are then fully anodized and powder coated for added chemical resistance. Liquid Ends are not
coated but are instead specially selected from a variety of materials depending on chemical
compatibility.
For the KP Pump, the most common Liquid End used is made from 316L stainless steel. The KP
Pump is available in a standard model, as well as a High-Pressure model (KP…HP); a High
Viscosity model (KP…HV); and a Low Flow model (KPL). Refer to section 4.1 KP Plunger Pump
Models for more detailed information regarding the various KP Pump models.
6.1 Specifications
The following details are the standard specifications for the KP Plunger Pump:
•Minimum Flow Capacity –KPL Model 0.14 GPH (0.5 LPH)
•Maximum Flow Capacity 112 GPH (416 LPH)
•Maximum Pressure –HP Model 1500 PSI (100 BAR)
•Accuracy +/- 2% between 10% and 100%
•Pump Weight 25 lb. to 50 lbs.
•Working Temperature 34° F (1°C) to 200°F (93°C)
•Noise 65 dB –75 dB

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6.2 KP Pump Dimensions
Please refer to the diagram below for the correct dimensions of the standard and high-
pressure TKM KP Pumps. All dimensions are formatted in the following way: Inches
(millimeters).
6.3 Temperature
The functioning temperature (TEMP) for all TKM Plunger Pumps is between 32°F (0°C) and
200°F (93°C).
32°F (1°C) ≤ TEMP ≤ 200°F (93°C)
The maximum working temperature should never exceed 200°F. Prolonged exposure to
temperatures exceeding 200°F will severely reduce oil life and may damage Liquid End
components.
6.4 Noise Levels
The average level of noise emitted by the K Series Metering Pumps varies depending on the
material of the Liquid End, and the size of the Liquid End. The following table shows the
average noise levels detected from four KP Pump prototypes at a distance of 3 feet (1 meter)
from the pump:
KP Pump Model –Stainless Steel Liquid
End
Noise Level in Decibels
KP16
< 65 dB
KP25
<68 dB
KP38
<71 dB
KP67
<75 dB

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The end user holds full responsibility of implementing the most
effective measures to prevent the health risks resulting from daily
noise exposure.
6.5 Pump Name Plate Notation
KP
15
S
75
A
/3
F
HP
A
B
C
D
E
F
G
H
I
J
The following pump model is designated by the notation above (KP15S75/3 HP):
A. K series Plunger Pump, B. Plunger Diameter 15 mm, C. 316L Stainless Steel Liquid End, D.
75 Strokes per Minute (SPM), E. Standard Stainless Steel Valve Balls, F. Aflas Valve O-rings, G.
Three Liquid Ends (Triplex), H. ANSI Flanged Connections, I. NEMA Motor Flange, J. High
Pressure Model.
A. The two or three letters at the start of the model number determine the series of the
pump. When paired together, the notation will determine the series and the type of
pump i.e.
KP –KSeries Plunger; KPL –KSeries Plunger Low Flow
oK –Series
oP –Plunger
oL –Low Flow
B. Plunger Diameter –This number determines the diameter of the plunger within the
Liquid End in millimeters. This number is considered the size of the pump.
C. Liquid End Material –The material of construction for the Liquid End will differ
depending on the pump application and model:
oS –316L SS
oA –Alloy 20
D. Strokes Per Minute (SPM) –The SPM notation shows the maximum number of strokes
the pump will complete in 60 seconds. SPM is determined by the gear ratio.
E. Valve Ball Material –The material of construction for the Valve Balls will differ
depending on the pump application and model:
oBLANK –Standard balls (Stainless steel in KP Pump)
oA –Alloy 20 balls

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F. Valve Seal Material –Depending on the application, the O-rings in the valves will
change:
oBLANK –FKM
oE –EPDM
oA –Aflas
oP –PTFE Seals
G. Number of pump heads -- A forward slash and a number (i.e. /3) will equal the number
of heads on the pump:
oBLANK –One Liquid End (simplex)
o/2 –Two Liquid Ends (duplex)
o/3 –Three Liquid Ends (triplex)
o/4 –Four Liquid Ends (quadraplex)
H. Liquid End valve connections –This section determines the fitting size of the valve
connections:
oBLANK –NPT
oB –BPT
oF –ANSI Flange
I. Motor Flange specification –The motor flange may change for international use:
oBLANK –NEMA
oQ –IEC
J. The final notation denotes a standard model, High Pressure model, or High Viscosity
model:
oBLANK –Standard model
oHP –High Pressure model
oHV –High Viscosity model
6.6 KP Standard Components
The following table contains all of the standard components for the KP Pump. If the model
contains components that differ from the standard ones they will be specified on the pump
nameplate with the appropriate notation.
Pump Model
S
A
Liquid End
316L SS
Alloy20
Diaphragm
PTFE
PTFE
Valve Housing
316LSS
Alloy20
Valve Balls
316LSS
Alloy20
Valve Seats
316LSS
Alloy20
Valve Guides
316LSS
Alloy20
Valve Seals
FKM
FKM

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Connections
NPT
NPT
Motor Flange
NEMA
NEMA
6.7 KP Gear Oil
Every KP Pump uses Shell Omala Oil 320 for proper lubrication of the gearing and internal
components. Each pump is filled with approximately 1 quart (0.95 liters) of Omala Oil 320.
The KP Pump’s oil should be replaced once a year. TKM recommends replacing the gear oil
with Shell Omala Oil 320. In the case that Shell Omala Oil 320 is unavailable, the following list
provides acceptable alternatives:
•Chevron Meropa 320
•Mobilgear 600 XP 320
•Phillips 66 Extra Duty Gear Oil 320
•Sunoco Sunep 320 Gear Oil
Never use a different replacement gear oil for the KP Plunger Pump
unless the replacement oil has been approved by TKM.
For a full Material Safety Data Sheet for the Shell Omala Oil 320 please visit
http://www.epc.shell.com/
7. Installation
Proper installation is critical for the efficient performance of the KP Pump. The pump should
be correctly mounted for operation in an easily accessible area. Secure the pump base plate to
an even, flat, sturdy surface. Do not attempt to mount the pump onto a sloped, uneven
surface. Do not fasten the pump from any other threaded holes located on the pump.
7.1 Mounting a TKM Pump
The following guidelines will assure that the TKM Pump is installed in a location that is ideal for
the efficient performance of the pump and convenient for routine maintenance and inspection.
The proper guidelines for choosing a location for the TKM Pump are as follows:

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•Mount the pump in clear accessible area that is high enough off of the ground to ensure
correct plumbing for the suction piping. Ideally the bottom valve should be mounted
no lower than 12 inches from the ground.
•Do not mount the pump directly onto a concrete foundation.
•The manual stroke adjustment should be facing an area with plenty of hand and arm
access to facilitate adjusting the stroke position.
•When installing the pump outdoors in a warm climate, TKM recommends covering the
pump to prevent direct sun exposure and overheating.
•When installing the pump in cool climate, TKM recommends installing the pump in an
enclosure that is warmed and insulated to prevent the chemical from solidifying within
the Liquid End and the valves.
7.2 Connecting the Suction Piping
To correctly connect the KP Pump to the available suction line, follow these guidelines:
•Qualified Personnel installing the TKM Pump must ensure that the valve axis is perfectly
vertical. Failing to ensure a perfectly vertical valve axis will hinder the pump’s
performance.
•The pipe leading into the suction side (bottom of the pump) should always be
equivalent in size to the pump’s connection.
oI.e. a pump with a 1/2-inch suction connection should attach to a 1/2-inch pipe
NOTE: The suction piping should never be smaller than the pump’s connection.
•The suction piping should always come from a flooded suction.
•The suction piping should be as short as possible.
•Piping should avoid bends if possible. This will prevent the likelihood of a vapor lock.
•Suction lines must be air tight to maximize the pump’s efficiency.
Please refer to the following diagrams to ensure that the suction piping has been correctly
installed:

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Figure 1 - Avoid irregular piping when connecting the suction line
Figure 2 - Avoid debris from bottom of reservoir tank
Figure 3 - Always run piping through walls or barriers

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7.2.1 Suction Line Filters
A filter in the form of a basket strainer or y-strainer on the suction piping is always
recommended to prevent insoluble substances and debris from entering the pump’s valves.
Any debris entering the pump head may cause the valves to malfunction.
The suction line filter needs to be cleaned often in order to prevent
malfunction of the pump and system.
Please refer to the following diagrams in order to correctly integrate a suction line strainer:
Figure 4 - Avoid rounded tubing in suction line to prevent air in suction line
Figure 5 - Correctly integrating a Y-strainer on the suction line

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7.3 Connecting the Discharge Piping
The discharge pipe should always be equal in size or larger than the pump suction connection.
It should never be smaller than the connection.
oWhen sizing the pipe always remember to consider the pipe length, the chemical
velocity, and the chemical viscosity.
oGenerally, a more viscous liquid will perform better with a larger discharge pipe.
7.3.1 Pressure Relief Valve
A pressure relief valve should always be
installed to protect the pump, the piping, and
any accessories installed. A pressure relief
valve protects the system in the case of
unprecedented back pressure buildup.
When the pressure relief valve (PRV) is
activated, the fluid will relieve from the bottom
of the valve. TKM recommends installing a
recycling line from the PRV back to the suction
reservoir.
Figure 6 - Using a foot valve with a strainer when suction line runs into reservoir tank
Figure 7 - PRV and recycling line