DA6A. AL380DC AL380DC AL380DC PS PS 356-T6AL 416SS 316SS PS N U N 86
DB6A. AL380DC AL380DC AL380DC PS PS 356-T6AL 416SS 316SS PS B B B 86
DV6A. AL380DC AL380DC AL380DC PS PS 356-T6AL 416SS 316SS PS V V V 86
DN6A. AL380DC AL380DC AL380DC PS PS 356-T6AL 416SS 316SS PS N N N 86
DI6A. AL380DC AL380DC AL380DC PS PS 356-T6AL 416SS 316SS PS I I I 86
DP6A. AL380DC AL380DC AL380DC PS PS 356-T6AL 416SS 316SS/I PS S S I 86
DR6A. AL380DC AL380DC AL380DC PS PS 356-T6AL 416SS 316SS PS H H N 86
DA6I. CI CI AL380DC PS PS 356-T6AL 416SS 316SS PS N U N 133
DB6I. CI CI AL380DC PS PS 356-T6AL 416SS 316SS PS B B B 133
DV6I. CI CI AL380DC PS PS 356-T6AL 416SS 316SS PS V V V 133
DN6I. CI CI AL380DC PS PS 356-T6AL 416SS 316SS PS N N N 133
DI6I. CI CI AL380DC PS PS 356-T6AL 416SS 316SS PS I I I 133
DR6I. CI CI AL380DC PS PS 356-T6AL 416SS 316SS PS H H N 133
DP6I. CI CI AL380DC PS PS 356-T6AL 416SS 316SS/I PS S S I 133
DA6II. CI CI CI PS PS CI 416SS 316SS PS N U N 168
DB6II. CI CI CI PS PS CI 416SS 316SS PS B B B 168
DV6II. CI CI CI PS PS CI 416SS 316SS PS V V V 168
DN6II. CI CI CI PS PS CI 416SS 316SS PS N N N 168
DI6II. CI CI CI PS PS CI 416SS 316SS PS I I I 168
DP6II. CI CI CI PS PS CI 416SS 316SS/I PS S S I 168
Elbow Chamber Chamber Plate Plate Housing Rod Seat ware Material Rings Wt. (lbs.)
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS PS N U N 133
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS PS B B B 133
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS PS F F F 133
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS PS V V V 133
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS PS N N N 133
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS PS I I I 133
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS/I PS S S I 133
‡SS ‡SS AL380DC ‡SS PS 356-T6AL 416SS 316SS PS H H N 133
‡SS ‡SS CI ‡SS PS CI 416SS 316SS PS N U N 168
‡SS ‡SS CI ‡SS PS CI 416SS 316SS PS B B B 168
‡SS ‡SS CI ‡SS PS CI 416SS 316SS PS V V V 168
‡SS ‡SS CI ‡SS PS CI 416SS 316SS PS N N N 168
‡SS ‡SS CI ‡SS PS CI 416SS 316SS PS I I I 168
‡SS ‡SS CI ‡SS PS CI 416SS 316SS/I PS S S I 168
See CF-8M Materials information above.
Meanings of
Abbreviations:
A = Compressed Fibre DC = Die Cast PS = Plated Steel SS/I = Stainless Steel seat with EPDM O-Ring
AL = Aluminum H = Hytrel
B = Nitrile I = EPDM SS = Stainless Steel U = Urethane
CI = Cast Iron N = Neoprene V = FKM (Fluorocarbon) F = FDA Accepted White Nitrile
®
S = Santoprene® T = PTFE
Most types available in dual port design. See price book or consult factory for details.
Hytrel is a registered tradename of E.I. du Pont. Santoprene is a registered tradename of Exxon Mobil Corp.
II 1 G c T5
II 3/1 G c T5
II 1 D c T100oC
I M1 c
I M2 c
Models equipped with Cast Iron or Stainless Steel wetted
parts, and Cast Iron midsection parts. See page 18 for
II 2 G c T5
II 3/2 G c T5
II 2 D c T100
o
C
All models, including pumps equipped with Aluminum
wetted and midsection parts.
See page 18 for ATEX Explanation of Type Examination
Certicate.
ATEX Explanation of EC-Type Certicate.
hdf2dl6sm-rev0614 Model HDF2 Page 2
Materials and Dimensions:
HDF2
Materials
Nitrile/FDA White Nitrile General purpose, oil-resistant. Shows good solvent, oil, water and hydraulic uid
resistance. Should not be used with highly polar solvents
like acetone and MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons.
EPDM Shows very good water and chemical resistance. Has poor resistance to oil and solvents, but is fair in
ketones and alcohols.
NEOPRENE All purpose. Resistant to vegetable oils. Generally not affected by moderate chemicals, fats,
greases and many oils and solvents. Generally
attacked by strong oxidizing acids, ketones, esters, nitro hydrocarbons and chlorinated aromatic hydrocarbons.
®
HYTREL
FKM (Fluorocarbon) shows good resistance to a wide range of oils and solvents; especially all aliphatic,
aromatic and halogenated hydrocarbons, acids, animal
and vegetable oils. Hot water or hot aqueous solutions (over 70°F) will attack FKM.
Urethane
Santoprene
lent abrasion resistance.
‡
Good on acids, bases, amines and glycols at room temperature.
Shows good resistance to abrasives. Has poor resistance to most solvents and oils.
®
Injection molded thermoplastic elastomer with no fabric layer. Long mechanical ex life. Excel-
CF-8M Stainless Steel equal to or exceeding ASTM specication A743 for corrosion resistant iron chro-
mium, iron chromium nickel, and nickel based alloy castings for general applications. Commonly referred
to as 316 Stainless Steel in the pump industry.
Maximum and Minimum Temperatures are the limits for which
these materials can be operated. Temperatures coupled with
pressure affect the longevity of diaphragm pump components.
Maximum life should not be expected at the extreme limits of
the temperature ranges.
Operating Temperatures
Maximum Minimum
190°F -10°F
88°C -23°C
280°F -40°F
138°C -40°C
200°F -10°F
93°C -23°C
220°F -20°F
104°C -29°C
350°F -40°F
177°C -40°C
150°F +32°F
66°C 0°C
275°F -40°F
135°C -40°C
For specic applications, always consult “Chemical Resistance Chart" Technical Bulletin
This pump also available in dual port design.
See price book or consult factory for details.
Dimensions are ± 1/8"
Figures in parenthesis = millimeters
21.65
550
20.30
516
OPTIONAL
VERTICAL
19.87
SUCTION
505
PORT
9.81
249
10.25
260
.50
8X
13
5.13
130
3/4" NPT AIR INLET
2" NPT SUCTION PORT
17.68
449
2.62
13.55
344
67
2" NPT DISCHARGE PORT
2.62
67
2.56
65
4.44
8.88
113
226
3/4" NPT EXHAUST
14.00
356
7.00
178
5.50
140
11.00
279
2" NPT(F) Suction and Discharge • ¾" NPT(F) Air Inlet
Port • ¾" NPT(F) Air Exhaust Port (not shown)
hdf2dl6sm-rev0614 Model HDF2 Page 3
SERVICE AND OPERATING MANUAL
II 2GD T5
Model HDF2
See pages 17 & 18
for ATEX ratings
Heavy Duty Flap Valve
PRINCIPLE OF PUMP OPERATION
This ap swing valve pump is powered by compressed air and is a 1:1
pressure ratio design. It alternately pressurizes the inner side of one diaphragm
chamber, while simultaneously exhausting the other inner chamber. This causes the
diaphragms, which are connected by a common rod, to move endwise. Air pressure
is applied over the entire surface of the diaphragm, while liquid is discharged from
the opposite side. The diaphragm operates under a balanced condition during the
discharge stroke, which allows the unit to be operated at discharge heads over 200
feet (61 meters) of water head.
Since the diaphragms are connected by a common rod, secured by plates to the
center of the diaphragms, one diaphragm performs the discharge stroke, while the
other is pulled to perform the suction stroke in the opposite chamber.
For maximum diaphragm life, keep the pump as close to the liquid being pumped
as possible. Positive suction head in excess of 10 feet of liquid (3.048 meters) may
require a back pressure regulating device. This will maximize diaphragm life.
Alternate pressuring and exhausting of the diaphragm chamber is performed by
means of an externally mounted, pilot operated, four-way spool type air distribution
valve. When the spool shifts to one end of the valve body, inlet air pressure is applied
to one diaphragm chamber and the other diaphragm chamber exhausts. When the
spool shifts to the opposite end of the valve body, the porting of chambers is reversed.
The air distribution valve spool is moved by an internal pilot valve which alternately
pressurizes one side of the air distribution valve spool, while exhausting the other
side. The pilot valve is shifted at each end of the diaphragm stroke by the diaphragm
plate coming in contact with the end of the pilot spool. This pushes it into position for
shifting of the air distribution valve.
The chambers are manifolded together with a suction and discharge ap-type
valve for each chamber, maintaining ow in one direction through the pump
Type 6
INSTALLATION & START-UP
Locate the pump as close to the product being pumped as possible, keeping suc-
tion line length and number of ttings to a minimum. Do not reduce line size.
For installations of rigid piping, short exible sections of hose should be installed
between pump and piping. This reduces vibration and strain to the piping system. A
surge suppressor is recommended to further reduce pulsation in ow.
This pump was tested at the factory prior to shipment and is ready for operation.
It is completely self-priming from a dry start for suction lifts of 20 feet (6.096 meters)
or less. For suction lifts exceeding 20 feet of liquid, ll the chambers with liquid prior
to priming.
AIR SUPPLY
Air supply pressures cannot exceed 125 psi (8.61 bar). Connect the pump air inlet
to an air supply of sufcient capacity and pressure required for desired performance.
When the air line is solid piping, use a short length of exible hose [not less than
3/4" (19mm) in diameter] between pump and piping to eliminate strain to pipes.
AIR INLET & PRIMING
For start-up, open an air valve approximately 1/2" to 3/4" turn. After the unit primes,
an air valve can be opened to increase ow as desired. If opening the valve increases
cycling rate, but does not increase ow rate, cavitation has occurred, and the valve
should be closed slightly.
For the most efcient use of compressed air and the longest diaphragm life, throttle
the air inlet to the lowest cycling rate that does not reduce ow.
hdf2dl6sm-rev0614 Model HDF2 Page 4
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