Tekleen LPF6P, LPF6XLP, LPF6LP, LPF6SP, LPF8P User Manual

USERS’

MANUAL

LPF

AUTOMATIC FILTERS, INC.

2672 S. LA CIENEGA BLVD.

LOS ANGELES, CA 90034

310 839 2828 800 336 1942

FAX [phone]

www.Tekleen.com

[e-mail]

Tekleen

Table of Contents

SECTION I INTRODUCTION

1.1 Description 1

1.2 Theory of Operation 1

1.3 Recommended Applications 1

1.4 Design Features 2

1.5 Filter Specifications Chart 3

1.6 Measurement Conversion Table 3
SECTION II INSTALLATION AND HOOK-UP

2.1 Mechanical Hook-Up and Orientation 4

2.2 Plumbing Hook-Up 4

2.3 GB6, DP Gauge, and Electric Ball Valve Connection 5
SECTION III OPERATION AND ADJUSTMENTS

3.1 Start-up 6

3.2 Backflush Requirements 7
SECTION IV MAINTENANCE

4.1 Filter Cleaning 8

4.2 Dirt Collector Replacement 8

4.3 Piston Removal/Replacement 8

4.4 Periodic Inspection 9
SECTION V TROUBLESHOOTING GUIDE

5.1 Excessive Pressure Drop Through Filter Without Flushing 9

5.2 Frequent Continuous Flushing While Filling Main Pipeline 10

5.3 Frequent Continuous Flushing During Normal Operation 10

5.4 Screen Will Not Clean Properly 11
SECTION VI SPARE PARTS

6.1 Recommended Spare Parts 12

6.2 Spare Parts List 12
APPENDICES

Appendix I Special Construction and Features 13
Appendix II System with Discharge to Atmosphere 14
Appendix III Piston 14

ILLUSTRATIONS

Particle Removal Process 15
Pressure Drop Chart 16
LPF Cutaway 17
LPF with GB6 Controller 18
2XLPF with GB7 Controller 19
LPF with Pressure Sustaining Valve 20
LPF with Bypass Relief Valve 21

WARRANTY 22

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SECTION I INTRODUCTION

1.1 Description

The LPF series models (Low Pressure Filter) are automatic, self cleaning
screen type water filters. The filtration system consists of a tank body with
a coarse screen, fine screen, electric motor, single flush valve and an
electronic controller.

1.2 Theory of Operation

Pressurized water enters the filter inlet and travels through the coarse screen
from the outside in. The water then travels through the fine screen from the
inside out where small contaminants (down to 25 microns) are filtered. The
clean water then exits through the outlet.

When the fine screen becomes contaminated, a pressure differential is
sensed causing the automatic controller to open the flushing valve and start
the electric motor. When the flushing valve opens, the pressure in the
hydraulic motor chamber is reduced causing the clean water to reverse flow
at the nozzles through the filter element pushing contaminants off the screen,
through the dirt collector and out the flushing valve.

The electric motor rotates the dirt collector as water passes through the nozzles.
Lateral movement allows the dirt collector to vacuum the entire screen.

When the screen is clean, the unit automatically closes the electric valve,
returning the filter to normal operation.

The entire cleaning cycle takes approximately 10-15 seconds. It should be
noted that even during the backflush cycle the filtration process continues
uninterrupted.

1.3 Recommended Applications

Tekleen filters are ideal for filtering out silt, scale, sand, rust, dirt and organic
material like algae, zebra mussels, and clams from virtually all types of water
sources.

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1.4 Design Features

Among the many features of the LPF models is the avoidance of the danger
of forcing contaminated water back into the system, which often happens
with sand filters. Tekleen filters will deliver clean water or no water at all.

The most predominant feature is its ability to remove organics such as algae
and other suspended particles.

All filter internal elements can be removed and disassembled from the filter
body without disruption of the plumbing.

The backwash cycle, Tekrinse, uses 90% less rinse water than other filters
on the market today.

For special constructions and applications, see Appendix I, page 13.

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1.4 Filter Specifications Chart

Model Flange Size

inches

LPF3SP
LPF4LP
LPF4P
LPF4LPE
LPF4LP
LPF6P
LPF6XLP
LPF6LP
LPF6SP
LPF8P
LPF8LP
LPF8SP
LPF10P
LPF10LP
LPF12P
LPF12LP
LPF14P
LPF14LP
LPF16LP
LPF16SP
LPF18SP
LPF20SP

3
3
4
4
4
6
6
6
6
8
8

8
10
10
12
12
14
14
16
16
18
20

Screen Area

sq. ft.

1.4

2.5

1.4’

2.5
5

2.5
8
5
7
5
8
7
7
11
11

12.5

12.5
16
16
24
24
24

Max Flow

gpm

200
300
300
400
500
600
800

800
1,750
1,320
1,500
1,750
1,750
2,630
2,630
4,000
4,000
6,000
6,000
7,000
8,000

10,000

Specifications: Carbon steel body with baked on powder epoxy coating or stainless
steel 316L body at the same price. Internal parts: stainless steel dirt collector,
stainless steel screen. Maximum 150 psi, 200° F. Standard screen mesh 50µ
to 1000µ. Optional high temperature, and high pressure.

1.5 Measurement Conversion Table

Mesh
Micron
Inch

20

850

.033

40

590

.016

60

250

.010

80

177

.007

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LPF Filters Manual

100
150

.006

140
105

.004

200

74

.003

325

44

.002

550

25

.001

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SECTION II INSTALLATION AND HOOK-UP

2.1 Mechanical Hook-Up and Orientation

The positioning of the filter tank should be determined by the disposal of
waste water and to allow easy access and removal of filter element (Consult
manufacturer for required clearances).

The Tekleen filter can
rest on the inlet and
outlet flanges or can be
mounted on a stand if
desired.

The electronic controller
should be mounted in
close proximity to the
filter tank.

2.2 Plumbing Hook-Up

The waste discharge pipe should be at least one inch larger in diameter than
the size of the discharge valve (1” valve to 2” pipe & 2” valve to 3” pipe).
The waste pipe should be kept as short as possible with no more than one elbow.

Discharge lines should not be elevated. This will affect the pressure difference
required for the cleaning cycle. If it is necessary to run discharge lines uphill,
please consult with the manufacturer.

Note: A block valve should be installed immediately upstream of the filter.
During start-up, the block valve should only be barely cracked open to prevent
a surge of pressure across the filter when the pump is started. Once the
pump is on-line, slowly open the block valve. This would prevent any possible
damage to the filter due to a pressure surge.

STANDARD HOOK-UP AND ORIENTATION

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2.3 GB6, DP Gauge, and Electric Ball Valve Connection

Before power is applied to the electronic controller, make all connections
between controller, DP Gauge, and electric ball valve (see page 18).

1. BALL VALVE: Plug controller into appropriate power source. Activate
manual start switch and visually inspect the open and close movement
of the ball valve.

2. FLUSHING TIME ADJUSTMENT: The flush time is normally set to 10
seconds. Flush time should be adjusted to allow piston indicator pin to

reach the end of the slot during one backwash cycle. NOTE: Excessive
flush time will not improve cleaning, and may lead to filter damage.

3. PRESSURE DIFFERNTIAL ADJUSTMENT: The differential switch is pre­set for 7 psi. It can be changed to different set points (see your electronic
controller manual).

USING 1/4 INCH DIAMETER TUBING

1. Attach tubing to the low pressure 1/4" fitting (on the outlet flange). Attach
the other end of the tubing to the fitting on the DP switch marked “low”
pressure.

2. Attach tubing to the high pressure 1/4" fitting (on the inlet flange). Attach
the other end of the tubing to the fitting on the DP switch marked “high”
pressure.

3. If the filter comes with a piston, attach tubing to the end of piston. Attach
the other end to the fitting on the flush outlet (before the flush valve).

Important Notes: Do not run tubing more than three feet in length (preferably

two feet or less). Due to the pressure drop across the tubing, the
electronic controller may not operate properly if tubing is too long.

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Electronic controller should be sealed completely to avoid moisture
from entering. This will prevent possible shorting of circuits.

For more operating details and set-up, please refer to your electronic rinse

controller manual.

SECTION III OPERATION AND ADJUSTMENTS

3.1 Start-Up

During start-up, the block valve at the filter inlet should be cracked open to
prevent a surge of pressure across the filter when the pump is started. Once
the pump is on-line, slowly open the block valve. This will prevent any possible
damage to the filter due to a pressure surge.

During the initial filling of the main pipeline, there may not be enough back­ pressure downstream from the filter to allow the cleaning cycle to function
properly. Therefore, it is necessary to install a valve on the outlet line to be
partially closed (i.e., gate valve, ball valve or butterfly valve).

If a downstream main line valve is partially closed, enough to provide 15 psi
on the filter inlet pressure gauge, the self cleaning cycle will operate properly .

Once the total system is fully charged, the downstream valve can be adjusted,
as long as 15 psi is maintained at the inlet flange during the backwash cycle.

If systems are to come on automatically , it is advisable to install a flow control
or a pressure sustaining valve downstream from filters to create backpressure
on filters in order to enable proper flushing while pipe lines are being filled.

Once the system is fully charged push the manual flush button on the
electronic controller, check the rotation of the electric motor on the end cover.
The motor should turn clockwise during the flush cycle.

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