Samson DF30, DF100, DF50 Operation And Maintenance Manual

1/2" DOUBLE DIAPHRAGM PUMP DF30 (38 l/min)
1/2" DOUBLE DIAPHRAGM PUMP DF50 (50 l/min)
1" DOUBLE DIAPHRAGM PUMP DF100 (100 l/min)

Technical data 1
Warnings and cautions 2
Description 2
Capacity curves 3
Dimensions 4
Installation 5
Operating instructions 6
Composite body parts:

DF30 / DF30T 7
DF50 / DF50T composite 8
DF50 / DF50T metallic 9

DF100 10
Troubleshooting 12
Maintenance guide 13

Operation and maintenance manual

DF50

DF30

Codes:

5530XX/ 5520XX
5510XX

ENGLISHESPAÑOL

DF100

Ratio
Maximum free flow
Delivery per stroke
Air pressure operating range
Solid in suspension max size
Maximum suction head

Weight

Fluid inlet (single inlet)

Fluid inlet (double inlet)

Fluid outlet

Air inlet
Wetted part materials
Noise level
Temperature range (see

material temperature range
on page 2)

Product customization

Technical data

DF30 DF50 DF100

1:1 1:1 1:1
10 gal/min (38 l/min) 13.21 gal/min (50 l/min)

2.37 oz (0,07 l) 3.38 oz (0,1 l)

43.51 to 100 psi (3 a 7 bar) 43.5 psi - 100 psi (3 a 7 bar) 43.5 psi - 100 psi (3 a 7 bar)

0.12 in (3 mm) 0.12 in (3 mm) 0.16 in (4 mm)

13.2 ft (4 m) dry

26.25 ft (8 m) wet

4.85 lb (2, 2 kg) 7.72 lb (3,5 kg) metallic

1/2" (BSP - NPT (F) 1/2" NPSM (F) and flange with metallic body

2 x 3/8" BSP - NPT (F) 2 x 3/8" NPSM (F) with metallic body

1/2" BSP - NPT (F) 1/2" NPSM (F) and flange with metallic body

3/8" NPSM (F) 3/8" NPSM (F) 3/8" NPSM (F)
See model specifications See model specifications See model specifications
80 db 80 dB 80 dB

19.69 ft (6 m) dry

26.25 ft (8 m) wet

6.17 lb (2,8 kg) plastic

(BSP- NPT (F) and flange with plastic body)

(BSP - NPT (F) with plastic body)

(BSP - NPT (F) plastic body)

0 - 158 ºF (0 - 70 ºC) 0 - 158 ºF (0 - 70 ºC) 0 - 158 ºF (0 - 70º C)

26.42 gal/min (100 l/min)

8.45 oz (0,25 l)

14.76 ft (4,5 m) dry

22.97 ft (7 m) wet

15.87 lb (7,2 kg) metallic

14.33 lb (6,5 kg) Plastic
1" BSP/NPT (F) and flange

_

1" BSP/NPT (F) and flange

* (oz,ft,gal/min) all in EEUU units

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1

Warnings and cautions

In this document you will find warnings and cautions for installation, use
and maintenance of the Direcflo pumps.

Warning

This symbol aware that there is a danger of serious bodily injury or death
if you ignore the warning described.

Warning

Carefully read the instructions and warnings before operating the equipment!

• This equipment is for professional use only

• Do not degrade the integrity of the equipment. Use only original
replacement components from Samson Corporation.

• Fluids not suitable for the pump can cause damage to the pump unit
and involve risk of serious personal injury.

• Always consult Samson Corporation if you have any questions about
the compatibility within the fluids and the pump materials, including
elastomers.

• Install and use the pump according to all local and national regulations
and abide all health and safety laws or legislation.

• The pump can produce fluid pressures equal to the air supply pressure.
Do not exceed the maximum allowable pressure of 100 psi (7 bar) air
supply. The total hydraulic pressure (differential pressure + system)
should never exceed 100 psi (7 bar).

• Never use a pump that leaks, that is damaged, that is corroded or
otherwise it may lack the capacity to contain the fluid.

• Frequently check that the bolts on the diaphragm cover of the pump are
torqued correctly.

Here’s the meaning of symbols you may find in this document and general
warnings that you should keep in mind.

Caution

This symbol aware that there is a danger of personal injury or property
damage if you ignore the caution described.

• Do not use a model with aluminium wetted surfaces to pump fluids for
human consumption, there is a possibility of trace contamination of lead.

• Danger of explosion if used 1,1,1-trichloroethane, methylene chloride
or other halogenated hydrocarbon solvents with aluminium wetted
materials. It could cause serious injury and property damage.

• Inside the pump, diaphragms separate the fluid that is being pumped
from the air supply. If a diaphragm breaks, the fluid can leak out of the
air exhaust and contaminate the environment.

• When handling hazardous fluids, always route the air exhaust into a
suitable container and locate it in a safe place.

• When the fluid source level is situated higher than the pump, (flooded
suction), the outlet tank must be at a higher level than the product to
prevent spills.

• For pumps handling hazardous fluids that are a danger to humans or to
the environment, install a suitable container surrounding the pump to
prevent any leaks or spills.

• Ensure that the operators of this equipment are trained on the operation
and limitations. Use safety equipment as safety goggles or other
equipment required.

Description

Air operated double diaphragm pumps are air-powered, reciprocating
positive displacement pumps with two pumping chambers. Two
diaphragms, centrally located in the chambers, separate the compressed
air (dry side) from the fluid being pumped (wet side). A shaft transmits

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the reciprocating motion of one diaphragm to the other. A directional valve
alternatively distributes the air from one chamber to the other; thus a
reciprocating movement of the diaphragms is created. With each stroke,
fluid is discharged by one of the diaphragms whilst the opposite
diaphragm sucks new fluid into the expanding chamber. Check valves, two
on the discharge side and two on the suction side, control and direct the
fluid flow.

2

855 822 R. 12/13

Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone [phone] • Fax [phone]

Material Temperature range

PTFE 5 ºC - 105 ºC / 41 ºF - 221 ºF
NBR 10 ºC - 80 ºC / 50 ºF - 176 ºF
Acetal 10 ºC - 90 ºC / 50 ºF - 194 ºF

®

Hytrel

10 ºC - 90 ºC / 50 ºF - 194 ºF
Neopreno -18 ºC - 93 ºC / 0 ºF - 200 ºF
Santoprene
Viton
Polypropylene

®

®

®

-29 ºC - 135 ºC / -20 ºF - 275 ºF

-10 ºC - 120 ºC / -4 ºF - 248 ºF

10 ºC - 80 ºC / 50 ºF - 176 ºF

Capacity curves

DF30

DF50

HEAD

100

7

6

5

4

3

2

OUTLET PRESSURE

1

0

BAR

100 psi / 7 bar

87

87 psi / 6 bar

72.5

58

43.5

72.5 psi / 5 bar

58 psi / 4 bar

43.5 psi / 3 bar

29

14

0

PSI

0 2.6 5.8 7.4 10.5

0 5 10 15 20 25 30 35 40

Litres per minute

HEAD

100 psi / 7 bar

87 psi / 6 bar

72.5 psi / 5 bar

58 psi / 4 bar

43.5 psi / 3 bar

AIR CONSUMPTION

SCFM

Nl/min

00.0

0.00

59.3

2.01

Nl/min

2.21

2.51

2.89

3.37

3.94

4.61

5.36

6,21

7.16

8.19

9.32

10.54

11.85

SCFM

SCFM

0.00

0.00

19.8

0.67

Nl/min

50.8

78.9

104.1

126.3

145.6

162

175.5

186.1

193.7

198.4

200.3

Nl/min

SCFM

1.72

0.00

0.00

2.67

25.6

0.87

Nl/min

3.53

57.1

4.28

85.4

4.94

110.5

5.49

132.4

5.95

151.1

6.31

166.7

6.57

179.1

6.73

188.3

6.79

194.3

SCFM

1.94

0,00

0.00

2.89

20.3

0.69

Nl/min

3.74

50.8

4.49

77.6

5.12

100.8

5.65

120.3

6.07

136.3

6.38

148.6

6.59

157.3

SCFM

1.72

0,00

0.00

2.63

12.5

0.42

3.42

39

1.32

4.08

62.5

2.12

4.62

83

2.81

5.04

100.5

3.41

5.33

115

3.90

SCFM

Nl/min

SCFM

Nl/min

SCFM

Nl/min

SCFM

ENGLISHESPAÑOL

65.3

73.9

85.3

99.4

116.2

135.8

158.2

183.2

211.1

241.6

274.9

310.9

349.7

Nl/min

Feet

Meter

PSI

BAR

0 2.6 5.28 7.4 10.5 13.2 16

NPSH

0 10 20 30 40 50 60

DF100

HEAD

100 psi / 7 bar

87 psi / 6 bar

72.5 psi / 5 bar

58 psi / 4 bar

43.5 psi / 3 bar

PSI

BAR

0 2.6 5.28 7.4 10.5 13.2 16 18.5 21 23.7 26 29 31.7

0 10 20 30 40 50 60 70 80 90 100 110 120

*Tested at room temperature, using water. Flooded pump with 3.5 inches, (80 mm), positive suction head.

Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone [phone] • Fax [phone]

Meter

NPSH

Feet

Nl/min

SCFM

Nl/min

SCFM

Nl/min

SCFM

Nl/min

SCFM

Nl/min

SCFM

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3

Dimensions

DF30 / DF30T

A B C D E F G H I J K L M N P

5.12" 6.3" 6.38" 4.13" 4.8" 0.31" 5.51" 5.31" 2.76"

130 mm 160 mm 162 mm 105 mm 122 mm 8 mm 140 mm 135 mm 70 mm 145 mm 24 mm 41 mm

1/2" BSP

NPT

5.71"

3/8" BSP

NPT

0.94"
M6

1,61"

Only DF30T

DF50 / DF50T

A B C D E F G H

6.14" 6.3" 6.57" 4.13" 4.8" 0.31" 5.75" 5.51"

156 mm 160 mm 167 mm 105 mm 122 mm 8 mm 146 mm 140 mm

H I J K L M N P

5.51" 2.76"

140 mm 70 mm 150 mm 24 mm 41 mm

1/2" BPS NPT

NPSM

5.91"
3/8" NPSM

0.94"
M6

1.61"

Only DF50T

DF100

A B C D E F G H I J K L

8.5" 7.44" 8.94" 6.89" 6.06" 0.35" 7.24" 8.27" 3.72"

216 mm 189 mm 227 mm 175 mm 154 mm 9 mm 184 mm 210 mm 94,51 mm 210 mm

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4

855 822 R. 12/13

Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone [phone] • Fax [phone]

1"BSP

NPT

8.27"
3/8" NPSM

Installation

Installation recommendations

• Remove the pump from its package and install it on the chosen location.

• Try to minimize the suction head. Install the pump as close as possible
to the fluid being pumped.

• Remember to have enough space around the pump to perform
maintenance tasks.

• Keep in mind to connect the inlet and outlet of the pump correctly.

• In case of diaphragm pump failure, the air exhaust will expell the
product being pumped.

• When the pump is installed in a place where a spill of fluid can cause
an environmental impact, the exhaust should be directed to a place.
where this spill could be contained.

• When installing the pump in its place, use brackets to secure its base.

• Fasten all bolts with the torques contained in this manual.

DF pumps are very easily configured and easy to install.
Flooded:

The pumping system was designed with positive pressure at the inlet. This
is the best possible installation when you need to evacuate the liquid from
the drum or tank, or when working with viscous fluids.
Not recommended for hazardous fluids.

Self-priming:

Pump is designed to generate vacuum. It is possible to evacuate all the air
from a hose or pipe without damaging the pump. Maximum suction height
is 19.69 ft (6 m), with the suction hose empty and up to 26.25 ft (8 m)
with the hose primed. (See page 1 for corresponds suction lift).

Submerged:

All pumps can be immersed in fluids. It is important to verify that all
components that are in contact with the fluid are chemically compatible.
In this case, air exhaust and fluid must be carried by hoses (optional air
connection).

NOTE: Use a pressure regulator with built-in filter inlet.

NOTE: The compressed air supply must be between 43.5 psi

(3 bar) and 100 psi (7 bar).

ENGLISHESPAÑOL

Recommended installation

The figure below shows the recommended configuration for the installation of a diaphragm pump.
Read the warnings and recommendations of the previous page before starting.

Air exhaust disposal

Warning

• Optional kit is required for remote exhaust.
The pump exhaust should be directed to a safe place, away from people,
animals and food.

• Remove the muffler.

• Connect a hose to the exhaust port of the pump and install the muffler

at the end of the hose. Use a hose with the same diameter as the
exhaust port. (If the hose is more than 5 feet (1.5 m), consult your
dealer or Samson Corporation).

• Have a moat, a protective housing, etc. at the end of the hose.

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5

Installation

Warning

Air connection

To ensure that the air supply is sufficient to meet the demand of the pump,
the diameter of the pipe must be equal to the diameter of the supply port
of the pump. Choose auxiliary air treatment equipment and fittings with
sufficient airflow to exceed the air consumption of the pump. In addition,

Operating instructions

This pump is self-priming.
To prime it the first time, you must connect the air pump supply to a low
pressure using the pressure regulators while keeping the outlet valve open.
When fluid begins to flow from the pump outlet, the pump is primed. For

Stopping the pump

• Close the inlet valve of the pump and stop the air supply.

• Make sure for your safety that the air valve is closed.

• Turn off the air compressor, or close the valve on the air supply side of
the auxiliary equipment.

• Close the discharge valve on the discharge side, then begin to slowly
open the drain valve and discharge pressure fluid.

• Open the air valve of the pump, turn on the pump and flush the
remaining fluid.

• After ensuring that the pump was turned off and the pressure was released,
fully open and close the regulator valve and drain valve of the pump.

peripheral air treatment equipment must be installed as close as possible
to the pump unit.
The use of a coupler to connect the hoses aids future operation and
maintenance tasks.

regulation of fluid pressure, the unit must be supplied with an air pressure
between 43.5 and 100 psi (3 and 7 bar). Adjust the discharge valve on the
discharge side to control flow. For the performance characteristics of the
pump see the capacity curve shown on page 3.

Grounding the pump

• When installing the pump, be sure to perform grounding in the
specified location.

• Also connect ground wires for the auxiliary equipment and piping.

• Use a grounding cable of at least 12 gauge (2.0 mm

STICKER THAT SHOWS
THE POSITION OF THE
GROUND WIRE

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2

).

Warning

• Connect grounding wires to the pump, piping and all other equipment too.

• When the pump operates ungrounded or with an incorrect connection,
friction between parts and abrasion caused by some fluids that flow
inside the pump, can generate static electricity. Moreover, according to
the type of fluid pump and the installation environment (such as gases
in the air or the type of the surrounding facilities) static electricity can
cause fire or electric shock.

• If the pump you have purchased is valid for Atex, a specific Atex manual
will accompany this one. Read this manual before operating the pump.

• If the unit is marked with the symbol,

it can be used in potentially
explosive atmospheres. Below this symbol, in the nameplate of the
pump, are indicated the areas for which the equipment is approved. You
will also find the maximum allowable surface temperature in the same
plate.

6

855 822 R. 12/13

Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone [phone] • Fax [phone]

DF30 and DF30T

Composite body pump parts

ENGLISHESPAÑOL

Externally controlled

Directional valve is sold do a
kit. Assembled and verified in
Samson.

Driven
exhaust

Normal
exhaust

No. Code Description Qty. Notes

Normal exhaust

1 Table 1 Directional Valve 1 Options:

Driven exhaust
Externally controlled

2 Table 2 Balls -
3 Table3 Ball check seats / O-rings / Ball guides -
4 Table 4 Bushing / Seal / Push rod -
5 Table 5 Diaphragms -

6 Kit (558301) Air sensors - Not available in externally controlled models

7 755117 Diaphragm cover 2 (Not sold as a kit)
8 940380 Diaphragm cover bolts 12 (Not sold as a kit)

9 Table 9 Pump shields 2 (Not sold as a kit)
11 855420 Diaphragm cover washers 4 (Not sold as a kit)
12 940319 Valves cap bolts 8 (Not sold as a kit)
13 Table 13 Valves caps 2 (Not sold as a kit)
14 Table 14 Body 1 (Not sold as a kit)
15 855414 Pump support 1 (Not sold as a kit)
16 940319 Support bolts 4 (Not sold as a kit)
17 855646 Cover 2 (Not sold as a kit)

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2013_12_17-16:30

7

DF50 and DF50T Composite pumps

All instances

Externally
controlled

1

Composite body pump parts

Directional valve is sold do a
kit. Assembled and verified in
Samson.

Driven
exhaust

Normal
exhaust

No. Code Description Qty. Notes

Normal exhaust

1 Table 1 Directional valve 1 Options:

Driven exhaust
Externally controlled

2 Table 2 Balls -
3 Table 3 Ball check seats / O-rings / Ball guides -
4 Table 4 Bushing / Seal / Push rod -
5 Table 5 Diaphragms -
6 Kit (558301) Air sensor - Not available with externally controlled models
7 755106 Diaphragm cover 2 (Not sold as a kit)

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8 940380 Diaphragm cover bolts 16 (Not sold as a kit)

9 Table 9 Pump shields 2 (Not sold as a kit)
10 941126 Diaphragm cover nuts 16 (Not sold as a kit)
11 855413 Diaphragm cover washers 4 (Not sold as a kit)
12 940319 Valves cap bolts 8 (Not sold as a kit)
13 Table 13 Valves caps 2 (Not sold as a kit)
14 Table 14 Body 1 (Not sold as a kit)
15 855414 Pump support 1 (Not sold as a kit)
16 940319 Support bolts 4 (Not sold as a kit)
17 855601 Cover 2 (Not sold as a kit)

8

855 822 R. 12/13

Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone [phone] • Fax [phone]

DF50 y DF50T Metallic

Externally
controlled

Composite body pump parts

ENGLISHESPAÑOL

Directional valve is sold do a
kit. Assembled and verified in
Samson.

1

Driven
exhaust

Normal
exhaust

No. Code Description Qty. Notes

Normal exhaust

1 Table 1 Directional valve 1 Options:

Driven exhaust
Externally controlled

2 Table 2 Balls -
3 Table 3 Ball check seats / O-rings / Ball guides -
4 Table 4 Bushing / Seal / Push rod -
5 Table 5 Diaphragms -
6 Kit (558301) Air sensor - Not available with externally controlled models
7 755106 Diaphragm cover 2 (Not sold as a kit)
8 940380 Diaphragm cover bolts 16 (Not sold as a kit)

9 Table 9 Pump shields 2 (Not sold as a kit)
10 940506 Pump shield bolts 8 (Not sold as a kit)
12 940319 Valves cap bolts 8 (Not sold as a kit)
13 Table 13 Balls caps 2 (Not sold as a kit)
14 Table 14 Body 1 (Not sold as a kit)
17 855601 Side cover 2 (Not sold as a kit)

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2013_12_17-16:30

9

DF100

Composite body pump parts

Externally
controlled

Directional valve is sold do a
kit. Assembled and verified in
Samson.

Driven
exhaust

Normal
exhaust

No. Code Description Qty. Notes

Normal exhaust

1 Table 1 Directional valve 1 Options:

Driven exhaust
Externally controlled

2 Table 2 Balls -

3 Table 3

Ball check seats / O-rings /

Ball guides

-

4 Table 4 Bushing / Seal / Push rod -
5 Table 5 Diaphragms -
6 Kit (558301) Air sensor - Not available with externally controlled models

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7 755111 Diaphragm cover 2 (Not sold as a kit)

8 940334 Diaphragm cover bolts 20 (Not sold as a kit)
10 940914 Diaphragm cover nuts 7 (Not sold as a kit)
12 940319 Diaphragm cover washers 12 (Not sold as a kit)

13 Table 13 Valves caps 2 (Not sold as a kit)
14 Table 14 Body 1 (Not sold as a kit)

17 855604 Cover 2 (Not sold as a kit)
21 Table 9 Upper shield 1 (Not sold as a kit)
22 Table 9 Lower shield 1 (Not sold as a kit)
23 855416 Shield attachment 4 *Only for composite

10

855 822 R. 12/13

Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone [phone] • Fax [phone]