Warren rupp SANDPIPER Drillers Series Parts list manual

dmf2dl5sm-rev0317 ©Copyright 2017 Warren Rupp, Inc. All rights reserved.
Warren Rupp, Inc. • A Unit of IDEX Corporation • 800 N. Main St., Manseld, Ohio 44902 USA
Telephone [phone] • Fax [phone] • warrenrupp.com
Table of Contents
Engineering Data and Performance Curve............................................................ 1
Temperature Limitations and Explanation of Pump Nomenclature ....................... 2
Dimensions DMF2R .............................................................................................. 3
Dimensions DMF2S............................................................................................... 4
Principle of Operation............................................................................................ 5
Installation and Start-Up........................................................................................ 5
Air Supply .............................................................................................................. 5
Air Inlet & Priming.................................................................................................. 6
ESADS+Plus®: Externally Serviceable Air Distribution System ................................ 6
Air Exhaust ............................................................................................................ 7
Between Uses ....................................................................................................... 7
Flap Valve Servicing .............................................................................................. 7
Diaphragm Servicing ............................................................................................. 8
Reassembly........................................................................................................... 8
Pilot Valve.............................................................................................................. 9
Pilot Valve Actuator................................................................................................ 9
Service Instructions: Troubleshooting ................................................................... 9
Warranty ................................................................................................................ 9
Material Codes .................................................................................................... 10
Composite Repair Parts List DMF2S.............................................................. 11-12
Composite Repair Drawing DMF2S .................................................................... 13
Composite Repair Parts List DMF2R .............................................................14-15
Composite Repair Drawing DMF2R .................................................................... 16
CE Declaration of Conformity - Machinery .......................................................... 17
CE Declaration fo Conformity - ATEX.................................................................. 18
Model DMF2R & DMF2S
2" Flap Valve Pump
Type 5
II 2GD T5
See pages 20 & 21
for ATEX ratings
SERVICE & OPERATING MANUAL
Original Instructions
DR LLERS
SERIES

IMPORTANT
Read the safety warnings and instructions in this manual
before pump installation and start-up. Failure to comply with
the recommendations stated in this manual could damage the
pump and void factory warranty.
When used for toxic or aggressive uids, the pump should
always be ushed clean prior to disassembly.
Airborne particles and loud noise hazards. Wear eye and ear
protection.
Before maintenance or repair, shut off the compressed air line,
bleed the pressure, and disconnect the air line from the pump.
Be certain that approved eye protection and protective clothing
are worn at all times. Failure to follow these recommendations
may result in serious injury or death.
ATEX compliant pumps are suitable for use in explosive atmospheres when the equipment is properly grounded
in accordance with local electrical codes. Pumps equipped with electrically conductive diaphragms are suitable for
the transfer of conductive or non-conductive uids of any explosion group. When operating pumps equipped with
non-conductive diaphragms that exceed the maximum permissible projected area, as dened in EN 13461-1: 2009
section 6.7.5 table 9, the following protection methods must be applied:
• Equipment is always used to transfer electrically conductive uids or
• Explosive environment is prevented from entering the internal portions of the pump, i.e. dry running
For further guidance on ATEX applications, please consult the factory.
When the pump is used for materials that tend to settle out
or solidify, the pump should be ushed after each use to
prevent damage. In freezing temperatures the pump should be
completely drained between uses.
Before pump operation, inspect all fasteners for loosening
caused by gasket creep. Retighten loose fasteners to prevent
leakage. Follow recommended torques stated in this manual.
CAUTION
WARNING
Nonmetallic pumps and plastic components are not UV
stabilized. Ultraviolet radiation can damage these parts and
negatively affect material properties. Do not expose to UV light
for extended periods of time.
In the event of diaphragm rupture, pumped material may enter
the air end of the pump, and be discharged into the atmosphere.
If pumping a product that is hazardous or toxic, the air exhaust
must be piped to an appropriate area for safe containment.
This pump is pressurized internally with air pressure during
operation. Make certain that all fasteners are in good condition
and are reinstalled properly during reassembly.
Take action to prevent static sparking. Fire or explosion can
result, especially when handling ammable liquids. The pump,
piping, valves, containers and other miscellaneous equipment
must be properly grounded.
Safety Information
Grounding ATEX Pumps
Use safe practices when lifting
kg
RECYCLING
Many components of SANDPIPER® AODD
pumps are made of recyclable materials.
We encourage pump users to recycle worn
out parts and pumps whenever possible,
after any hazardous pumped fluids are
thoroughly ushed.
WARNING
The use of non-OEM replacement parts will void (or negate)
agency certications, including CE, ATEX, CSA, 3A and EC1935
compliance (Food Contact Materials). Warren Rupp, Inc. cannot
ensure nor warrant non-OEM parts to meet the stringent
requirements of the certifying agencies.

dmf2dl5sm-rev0317 Model DMF2 Page 1
2" Flap Valve
DMF2R &
DMF2S Type 5
Air-Operated
Double Diaphragm Pump
ENGINEERING, PERFORMANCE
& CONSTRUCTION DATA
INTAKE/DISCHARGE PIPE SIZE
2" (50mm) NPT (F)
CAPACITY
0 to 140 gallons per minute
(0 to 530 liters per minute)
AIR VALVE
No-lube, no-stall
design
SOLIDS-HANDLING
Up to 2" (50mm)
HEADS UP TO
125 psi or 289 ft. of water
(8.8 Kg/cm2or 88 meters)
Quality System
ISO 9001 Certied
Environmental
Management System
ISO 14001 Certied
SANDPIPER®PUMPS ARE DESIGNED TO BE POWERED ONLY BY COMPRESSED AIR.
40 PSI
60 PSI
80 PSI
100 PSI
10
0
20
30
40
50
60
70
80
90
100
200 40 60 80 100 120 140 160
10(17) 20(34) 30(51)
40(68)
50(85)60(101.9)
70(118.9)
80(135.9)
90(152.9)
100(169.9)
150(254.9)
0 200 300 400 500 600
BAR
100
0
1
2
3
4
5
6
7
PSI
125(212.4)
20 PSI Air Inlet Pressure
Liters per minute
U.S. Gallons per minute
CAPACITY
AIR CONSUMPTION
SCFM (M3/hr)
HEAD
MODEL DMF2 Performance Curve
Performance based on the following: elastomer fitted pump, flooded suction,
water at ambient conditions. The use of other materials and varying hydraulic
conditions may result in deviations in excess of 5%.
II 2GD T5
See pages 20 & 21
for ATEX ratings
DR LLERS
SERIES

dmf2dl5sm-rev0317 Model DMF2 Page 2
Meanings of
Abbreviations:
AL = Aluminum DC = Die Cast SS = Stainless Steel
B = Nitrile PS = Plated Steel
Explanation of Pump Nomenclature: DMF2R & DMF2S
II 2GD T5
II 2 G c T5
II 3/2 G c T5
II 2 D c T100oC
All models, including pumps equipped with Aluminum wetted and midsection parts.
See page 21 for ATEX Explanation of Type Examination Certicate.
DMF2
Type 5
Manifold
Elbow
Outer
Chamber
Inner
Chamber
Outer
Diaphragm
plates
Inner
Diaphragm
Plate
Intermediate
Housing
Diaphragm
Rod
Valve
Seat
Hardware Diaphragm Flap
Valve
Material
Seat
Gasket
Sealing
Rings
Shippping
Wt. (lbs)
DB-5-A AL380DC AL380DC AL380DC PS PS 356-T6AL 435SS 316SS PS B B N/A B 86
MATERIALS OF CONSTRUCTION
To order a pump or replacement parts, rst enter the Model Number DMF2R, or DMF2S, followed by the Type Designation listed below in the far left column.
Materials
Operating Temperatures
For specic applications, always consult “Chemical Resistance Chart" Technical Bulletin
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.
Maximum Minimum
190°F -10°F
88°C -23°C
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.

dmf2dl5sm-rev0317 Model DMF2 Page 3
Dimensions: DMF2R
Dimensions are ± 1/8"
Figures in parenthesis = millimeters
11.93
303
13.00
330
26.00
660
5.58
142
19.80
503
24.50
622
5.58
142
4.69
119
27.00
686
13.50
343
3/4" NPT AIR INLET
SUCTION PORT
2" CAM AND GROOVE
DISCHARGE PORT
2" CAM AND GROOVE
3/4" NPT AIR EXHAUST
11.93
303
13.00
330
26.00
660
5.58
142
19.80
503
24.50
622
5.58
142
4.69
119
27.00
686
13.50
343
3/4" NPT AIR INLET
SUCTION PORT
2" CAM AND GROOVE
DISCHARGE PORT
2" CAM AND GROOVE
3/4" NPT AIR EXHAUST

dmf2dl5sm-rev0317 Model DMF2 Page 4
Dimensions: DMF2S
Dimensions are ± 1/8"
Figures in parenthesis = millimeters
15.98
406
26.04
661
32.00
813
23.85
606
8.73
222
5.58
142
18.50
470
5.58
142
3/4" NPT AIR INLET
SUCTION PORT
2" CAM AND GROOVE
DISCHARGE PORT
2" CAM AND GROOVE
3/4" NPT AIR EXHAUST
15.98
406
26.04
661
32.00
813
23.85
606
8.73
222
5.58
142
18.50
470
5.58
142
3/4" NPT AIR INLET
SUCTION PORT
2" CAM AND GROOVE
DISCHARGE PORT
2" CAM AND GROOVE
3/4" NPT AIR EXHAUST

dmf2dl5sm-rev0317 Model DMF2 Page 5
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 check valve for each chamber,
maintaining ow in one direction through the pump.
INSTALLATION & START-UP
Locate the pump as close to the product being pumped as possible, keeping suction 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.AWarren RuppTranquilizer®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 sufcient 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.
Heavy Duty Flap
SERVICE AND OPERATING MANUAL Model DMF2R
DMF2S
2" Flap Valve Pump
Type 5
II 2GD T5
See pages 20 & 21
for ATEX ratings
DR LLERS
SERIES

dmf2dl5sm-rev0317 Model DMF2 Page 6
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 efcient use of compressed air and the longest diaphragm
life, throttle the air inlet to the lowest cycling rate that does not reduce ow.
A NOTE ABOUT AIR VALVE LUBRICATION
The SANDPIPER pump’s pilot valve and main air valve assemblies are
designed to operate WITHOUT lubrication. This is the preferred mode of
operation. There may be instances of personal preference, or poor quality
air supplies when lubrication of the compressed air supply is required. The
pump air system will operate with properly lubricated compressed air supplies.
Proper lubrication of the compressed air supply would entail the use of an
air line lubricator (available from Warren Rupp) set to deliver one drop of
10 wt., non-detergent oil for every 20 SCFM of air the pump consumed at
its point of operation. Consult the pump’s published Performance Curve to
determine this.
It is important to remember to inspect the sleeve and spool set routinely.
It should move back and forth freely. This is most important when the air
supply is lubricated. If a lubricator is used, oil accumulation will, over time,
collect any debris from the compressed air. This can prevent the pump from
operating properly.
Water in the compressed air supply can create problems such as icing
or freezing of the exhaust air causing the pump to cycle erratically, or stop
operating. This can be addressed by using a point of use air dryer to supplement
a plant’s air drying equipment. This device will remove excess water from the
compressed air supply and alleviate the icing or freezing problem.
ESADS+PLUS:
EXTERNALLY SERVICEABLE AIR DISTRIBUTION SYSTEM
Please refer to the exploded view drawing and parts list in the Service
Manual supplied with your pump. If you need replacement or additional
copies, contact your local Warren Rupp Distributor, or the Warren Rupp
factory Literature Department at the number shown below. To receive the
correct manual, you must specify the MODEL and TYPE information found
on the name plate of the pump.
MODELS WITH 1" SUCTION/DISCHARGE OR LARGER,
AND METAL CENTER SECTIONS:
The main air valve sleeve and spool set is located in the valve body mounted
on the pump with four hex head capscrews. The valve body assembly is
removed from the pump by removing these four hex head capscrews.
With the valve body assembly off the pump, access to the sleeve and
spool set is made by removing four hex head capscrews (each end) on the
end caps of the valve body assembly. With the end caps removed, slide the
spool back and forth in the sleeve. The spool is closely sized to the sleeve
and must move freely to allow for proper pump operation. An accumulation
of oil, dirt or other contaminants from the pump’s air supply, or from a failed
diaphragm, may prevent the spool from moving freely. This can cause the
spool to stick in a position that prevents the pump from operating. If this is
the case, the sleeve and spool set should be removed from the valve body
for cleaning and further inspection.

dmf2dl5sm-rev0317 Model DMF2 Page 7
Remove the spool from the sleeve. Using an arbor press or bench
vise (with an improvised mandrel), press the sleeve from the valve
body. Take care not to damage the sleeve. At this point, inspect the
o-rings on the sleeve for nicks, tears or abrasions. Damage of this
sort could happen during assembly or servicing. A sheared or cut
o-ring can allow the pump’s compressed air supply to leak or bypass within
the air valve assembly, causing the pump to leak compressed air from the
pump air exhaust or not cycle properly. This is most noticeable at pump dead
head or high discharge pressure conditions. Replace any of these o-rings as
required or set up a routine, preventive maintenance schedule to do so on
a regular basis. This practice should include cleaning the spool and sleeve
components with a safety solvent or equivalent, inspecting for signs of wear
or damage, and replacing worn components.
To re-install the sleeve and spool set, lightly lubricate the o-rings on the sleeve
withano-ringassembly lubricant orlightweightoil(suchas 10wt.airlinelubricant).
Re-install one end cap, gasket and bumper on the valve body. Using the
arbor press or bench vise that was used in disassembly, carefully press the
sleeve back into the valve body, without shearing the o-rings. You may have
to clean the surfaces of the valve body where the end caps mount. Material
may remain from the old gasket. Old material not cleaned from this area may
cause air leakage after reassembly. Take care that the bumper stays in place
allowing the sleeve to press in all the way. Reinstall the spool, opposite end
cap, gasket and bumper on the valve body. After inspecting and cleaning the
gasket surfaces on the valve body and intermediate, reinstall the valve body
on the pump using new gaskets. Tighten the four hex head capscrews evenly
and in an alternating cross pattern.
AIR EXHAUST
If a diaphragm fails, the pumped liquid or fumes can enter the air end of the
pump, and be exhausted into the atmosphere. When pumping hazardous or
toxic materials, pipe the exhaust to an appropriate area for safe disposition.
This pump can be submerged if materials of construction are compatible
with the liquid. The air exhaust must be piped above the liquid level. Piping
used for the air exhaust must not be smaller than 1" (2.54 cm). Reducing the
pipe size will restrict air ow and reduce pump performance .When the product
source is at a higher level than the pump (ooded suction), pipe the exhaust
higher than the product source to prevent siphoning spills. (See page 7)
Freezing or icing-up of the air exhaust can occur under certain temperature
and humidity conditions. Use of an air dryer unit should eliminate most icing
problems.
BETWEEN USES
When used for materials that tend to settle out or transform to solid form,
the pump should be completely ushed after each use, to prevent damage.
Product remaining in the pump between uses could dry out or settle out. This
could cause problems with valves and diaphragms at re-start. In freezing
temperatures, the pump must be drained between uses in all cases.
FLAP VALVE SERVICING
Valve inspection requires removal of 3/8" hex nuts and elbows. When
the top suction elbows are removed, the valve and seat are connected as
an assembly. When the bottom discharge elbows are removed, the valve
and seat stay with the outer chamber. Visual inspection and cleaning is
possible. If parts are to be replaced, remove the self-locking nuts and all parts
are accessible.

dmf2dl5sm-rev0317 Model DMF2 Page 8
DIAPHRAGM SERVICING
Diaphragms can be inspected or the diaphragm assembly removed
without removing the suction and discharge anges. Remove (8) nuts
around the chamber ange, and the housing assembly will pull off. Flap
valves can be inspected for proper seating at this point as well as the
diaphragm. Use care to keep foreign matter from behind the diaphragm.
The opposite diaphragm may be inspected by the same procedure.
If either diaphragm has to be replaced, follow closely these steps:
Pull the outer diameter of one diaphragm off the (8) capscrews. NOTE: One
side only! On the free diaphragm assembly, use a 3/8" allen wrench to turn the
assembly (diaphragm,platesandscrew)loosefromtheshaft.Oncetheassembly
has turned, it will turn out by hand by use of the diaphragm. Now the opposite
diaphragmassemblyandthedriveshaftwillpullfreefromthecapscrewsandpump
intermediate assembly. The interior components consisting of sleeve bearings,
rod seals, and pilot valve actuator bushings are now accessible for service if
required. Hold the shaft in a clamping device making sure to protect surface
of shaft so as not to scratch or mar it in any way. The diaphragm assembly
will turn loose. To disassemble the components, turn a 1/4"-20 capscrew by
hand into the tapped hole in the inner plate. This keeps the plate from turning
while the socket head capscrew is removed. To do this, place assembly in a
vise so the two protruding ends of screws are loose in the vise jaws (about
3/4" apart). Turn the center screw loose from the back plate and the assembly
will come apart.
REASSEMBLY
All procedures for reassembling the pump are the reverse of the previous
instructions with further instructions as shown:
1.The diaphragm assemblies are to be installed with the natural bulge
outward or toward the head of the center screw. Make sure both plates are
installed with outer radii against the diaphragm. After all components are in
position in a vise and hand tight, set a torque wrench for 480 inch pounds
(40 ft. pounds) (54.23 Newton meters) using a (3/8") allen head socket. After
each diaphragm sub assembly has been completed, thread one assembly
into the shaft (held near the middle in a vise having soft jaws to protect the
nish) making sure the stainless steel washer is in place on the capscrew.
Make sure 1/4"-20 mounting screw has been removed and that the bumper
(Item #19 on drawing) is in place in the shaft.
Install this sub assembly into the pump and secure by placing the outer
chamber housing and capscrews on the end with the diaphragm. This will
hold the assembly in place while the opposite side is installed. Make sure
the last diaphragm assembly is torqued to 30 ft. lbs. (40.67 Newton meters)
before placing the outer diaphragm over the capscrews. If the holes in the
diaphragm ange do not line up with the holes in the chamber ange, turn
the diaphragm assembly in the direction of tightening to align the holes so
that the capscrews can be inserted. This nal torquing of the last diaphragm
assembly will lock the two diaphragm assemblies together.
Place remaining outer chamber on the open end and tighten down the
securing nuts gradually and evenly on both sides.
Caution should be used while reassembling ap valves. The valves are
designed for some preload over the retainer hinge pad. This is done to insure
proper face contact with the seat. After all parts are in place, tighten the lock
nuts down on the assembly to the point where visual inspection shows that
seat and valve face mate without gap. This is important for dry prime. However,
after priming action has started, valves will function due to differential pressure
without concern or trouble.