WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 31
4484 Boeing Drive - Rockford, IL 61109
SECTION INDEX
Description Page
Delta Power Rotary Flow Divider, Positive Displacement (Application Data) ................................... 32
P Series, Equal Flow Two Sections ...................................................................................... 35
P Series, Equal Flow Multi-Sections ..................................................................................... 36
PM Series, Equal Flow Multi-Sections .................................................................................. 37
PM Series, Equal Flow Multi-Section with Relief Valves ....................................................... 38
HPR Series, Heavy Duty with Relief Valves ......................................................................... 39
FLOW DIVIDERS
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 32
4484 Boeing Drive - Rockford, IL 61109
Delta Power Rotary Flow Divider, Positive Displacement
Delta Series P geared ow dividers, accurately divide ow from a single hydraulic source
into two or more equal or proportionate circuits. In like manner, the input pressure
required will be proportional to levels of ow/pressure out of the ow divider, rather than
at the highest pressure level, thereby saving what would normally be wasted energy.
Proven design, stable material selection and precision machining are the Delta keys to
reliable performance you can depend on in a variety of applications.
Application Suggestions
1. For greatest efciency and accuracy, ow dividers should be used at near
maximum rated inlet gallonage. For quieter operations, lowered RPM should
be considered.
2. Maximum (3500) and minimum 500 RPM; inlet pressure ratings and differential
pressure ratings should be followed.
3. Provide over-pressure protection (relief valves) in each circuit.
4. When designing ow dividers into a static circuit, remember that they are
dynamic devices which do nothing while static.
5. Use SAE 10 through SAE 30 industrial petroleum-based hydraulic oil with 200 SSU
viscosity; lter to 25 microns.
6. Do not use teon tape in installation. Use plastic pipe sealant with NPTF ports.
• High-strength permanent mold cast iron housing
• Precision needle bearings
• Precise machined trapping relief grooves provide
constant lling and discharging to assure quiet
operation and maximum bearing life.
• O-ring seals between sections (Buna-N)
Where one pump operates a
number of hydraulic motors: car
wash systems lubrication systems
(multiple point), hydraulic motor
driven machines, (harvesting
machinery, etc.)
Where two or more cylinders must
be synchronized: lift platforms,
scaffolds, presses.
Where main pump pressure must
be intensied in one circuit of
multiple circuit machinery, such as
waste compactors and other hi-lo
applications
Where two or more circuits must be
controlled independently at different
pressures: presses, machine tools,
etc.
FLOW DIVIDERS
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 33
4484 Boeing Drive - Rockford, IL 61109
Application Data
The Delta ow divider is a positive displacement ow dividing or proportioning apparatus. It will divide the ow from one
source into two or more equal or proportionate circuits, and intensify or reduce the pressure level as required. Note that
these ow dividers will operate in reverse in a combine mode, but in that mode, the accuracy likely would be signicantly
reduced.
In its basic conguration, the unit consists of a number of inter coupled gear type hydraulic pump motors. Each section
must be capable of performing the pumping or motoring function. The section have a common inlet and separate outlets.
Fluid from a prime source, such as pump, supplies the motive power to the ow divider. No energy is added to the uid in
the device, although each outlet may have an energy level difference than any other section. When the sections are of like
size, the function is to divide the total ow into equal increments of ow, and when the sections are of unlike size, the
function is to divide the ow into proportionate increments relative to the chosen geometric displacements.
Since the ow divider is a positive displacement machine, it will accomplish its function over a wide range of pressure of
viscosity differentials. Nevertheless, certain limits are imposed due to slip characteristics and torque losses in the
machine. Therefore, the performance criteria in this paper will be developed around a unit of average tolerance allowance.
The data, so derived, will be averaged. Be aware that these units can require a certain amount of break-away pressure. It is
recommended that operation at low pressures (< 100 PSI) is not attempted without consultation with the factory.
General Relationships
In any unit, neglecting any losses, there exists the relationship that
Qi = Q1+ Q2 + …. Qn;
Where Qi is the ow into the unit and Q1, Q2 and Qn are the displacements out of each section. Since no energy is added
and if none were lost, it follows that
PiQi = P1Q1 + P2Q2 + …. PnQn;
Where Pi is the pressure into the unit and P1, P2 and Pn are the pressure levels out of each section.
In a unit consisting of any number of/or sizes of sections
P1Q1 + P2Q2 + …. PnQn
Pi =
Qi
In any actual case, the above theoretical observations must be corrected to encompass the pressure drop and slip losses
in the ow divider. The pressure drop is primarily a function of the amount of uid and viscosity. At the usual viscosities
(100 to 300 SSU) encountered in hydraulic systems, the pressure drop ∆Pp, can be approximated by the relationship,
where n is the number of sections,
6Qi
∆PP ≅ +25
n
Since the ow divider itself is a parallel circuit, the actual pressure Pia into the unit is
P1Q1 + P2Q2 + …. PnQn
Pia ≅ + ∆PP
Qi
FLOW DIVIDERS
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 34
4484 Boeing Drive - Rockford, IL 61109
Slip is a function of the viscosity, pressure differential and clearance and can be estimated from the following chart:
The slip function increases or decreases the ow from a section, dependent on whether the pressure differential is
positive or negative across that section.
The performance of a system would be determined in the following manner.
1. Determine the size of the sections that will best give the required ow and pressure. The displacement from each
section will be the fractional proportion of the sectional displacement versus the sum of the displacements of all
the sections. That fraction multiplied by the input ow gives output displaced by each section.
6Qi
2. Determine ∆Pp from ∆PP ≅ +25
n
P1 Q1 + P2 Q2 …. Pn Qn
3. Determine Pia from Pia ≅ +∆PP
Q1
4. Determine the pressure differential ∆P1, ∆P2, ∆Pn across the individual section where ∆
P
1 = ∆Pia - ∆P1, etc., and
from this value, determine the slips S1, S2, Sn.
5. Determine
Q
1a, Q2a, Qna from Q1a = Q1 + S1, etc.
The foregoing description is intended as an aid in determining the results of a ow divider system. Any specic application
should not be undertaken without independent study, evaluation and testing for suitability. Exceeding the specications
could result in equipment malfunction, property damage, serious injury or death.
FLOW DIVIDERS
MODEL DISPLACEMENT
GAL./REV./SECT.
SLIP/100 PSI
(GPM)
MAX. FLOW/SECT.
(GPM)
PM2 .00047 .03 2.0
PM6 .00137 .04 5.5
P21 .00178 .06 7.6
P23 .00304 .07 12
P25 .00425 .08 17
P26 .00531 .10 20
P27 .00633 .11 25
P43 .01020 .15 35
P47 .01690 .22 50
Application Data
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 35
4484 Boeing Drive - Rockford, IL 61109
P Series, Equal Flow Two Sections
P23 & P27
P43 & P47
MODEL
NUMBER
OF
SECTIONS
TOTAL MAX.
INLET
(GPM)
0 PSI DISP.
PER SECT.
GAL./REV
SLIP
GPM/100 PSI
MAXIMUM
INTERMITTENT
PSI
MAXIMUM
CONTINUOUS
PSI
BOLT
TORQUE
Ft. Lb.
A
MAX. DIFF.
BETWEEN
SECT. (PSI)
PM2
2 3.5 0.00047 0.026 2500 2000 13-17 3.83 1500
PM6
2 9.5 0.00137 0.038 2000 1500 13-17 4.72 1000
P23
2 21.0 0.00304 0.068 2000 1500 24-31 5.32 1000
P25
2 30.0
0.00425 0.083 2000 1500 24-31
- 1000
P27
2 44.0 0.00633 0.113 2000 1500 24-31 6.86 1000
P43
2 70.0 0.01020 0.135 2000 1500 24-31 7.75 1000
P47
2 100.0 0.01690 0.210 2000 1500 24-31 9.25 1000
FLOW DIVIDERS
Equal ow two-section units divide ow from a common pump source into separate ows of equal proportion. Both gear
sets are assembled to a common shaft.
PM2 & PM6
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 36
4484 Boeing Drive - Rockford, IL 61109
P Series, Equal Flow Multi-Sections
P23-(57-60) & P27-(57-60)
FLOW DIVIDERS
MODEL NUMBER OF
SECTIONS
TOTAL
M A X . I N L E T
(GPM)
0 PSI DISP.
PER SECT.
GAL./REV,
SLIP GPM/100
PSI
MAXIMUM
INTERMITTENT PSI
MAXIMUM
CONTINUOUS PSI
BOLT
TORQUE
Ft.-Lb.
A B C D MAX. DIFF.
BETWEEN
SECT. (PSI)
PPM2 4 7.0 0.00047 0.026 2000 1500 13-17 - - - - 1000
P21-60 3 18.6 0.00178 0.06 2000 1500 24-31 - - - - 1000
P21-59 4 24.8 0.00178 0.06 2000 1500 24-31 - - - - 1000
P21-58 5 31 0.00178 0.06 2000 1500 24-31 - - - - 1000
P21-57 6 37.2 0.00178 0.06 2000 1500 24-31 - - - - 1000
P23-60 3 31.5 0.00304 0.068 2000 1500 24-31 0.715 2.39 2.56 8.83 1000
P23-59 4 42.0 0.00304 0.068 2000 1500 24-31 0.715 2.39 2.56 11.39 1000
P23-58 5 52.5 0.00304 0.068 2000 1500 24-31 0.715 2.39 2.56 13.95 1000
P23-57 6 63.0 0.00304 0.068 2000 1500 24-31 0.715 2.39 2.56 16.51 1000
P27-60 3 66.0 0.00633 0.113 2000 1500 24-31 1.490 3.16 3.33 11.16 1000
P27-59 4 88.0 0.00633 0.113 2000 1500 24-31 1.490 3.16 3.33 14.49 1000
P27-58 5 110.0 0.00633 0.113 2000 1500 24-31 1.490 3.16 3.33 17.82 1000
P27-57 6 132.0 0.00633 0.113 2000 1500 24-31 1.490 3.16 3.33 21.15 1000
PPM2
Equal ow multi-section units consist of several identical, individual sections coupled together to divide a ow from a
common pump source into three or more equal ows. Each set of gear and shaft assemblies are individually supported in
needle bearings.
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 37
4484 Boeing Drive - Rockford, IL 61109
PM Series, Equal Flow Multi-Sections
PM6
Additional equal-ow unites (up to 6 sections) may be built up using several of the same sections as shown in the Mixed Flow Chart.
Note: when computing slip loss, above gures should be applied to reect differential pressure between inlet and outlet of each section. Due to normal
manufacturing tolerances, accuracies can be assumed to be no greater than +/- 1% between sections under balanced load conditions.
FLOW DIVIDERS
MODEL NUMBER OF
SECTIONS
TOTAL
M A X . I N L E T
(GPM)
0 PSI DISP.
PER SECT.
GAL./REV,
SLIP GPM/100
PSI
MAXIMUM
INTERMITTENT PSI
MAXIMUM
CONTINUOUS PSI
BOLT
TORQUE
Ft.-Lb.
A B C MAX. DIFF.
BETWEEN
SECT. (PSI)
PM1-59 4 4 0.00028 0.015 2500 2000 24-31 - - - 1000
PM1-57 6 6 0.00028 0.015 2500 2000 24-31 - - - 1000
PM2-60 3 5.3 0.00047 0.017 2500 2000 24-31 5.71 6.83 7.71 1000
PM2-59 4 7.0 0.00047 0.017 2500 2000 24-31 7.07 8.19 9.07 1000
PM2-58 5 8.8 0.00047 0.017 2500 2000 24-31 8.43 9.55 10.43 1000
PM2-57 6 10.5 0.00047 0.017 2500 2000 24-31 9.79 10.91 11.79 1000
PM6-60 3 14.3 0.00137 0.025 2000 1500 24-31 7.06 8.18 9.06 1000
PM6-59 4 19.0 0.00137 0.025 2000 1500 24-31 8.87 9.99 10.87 1000
PM6-58 5 23.8 0.00137 0.025 2000 1500 24-31 10.68 11.80 12.68 1000
PM6-57 6 28.5 0.00137 0.025 2000 1500 24-31 12.49 13.51 14.49 1000
Equal ow multi-section units consist of several identical, individual sections coupled together to divide a ow from a
common pump source into three or more equal ows. Each set of gear and shaft assemblies are individually supported in
needle bearings.
PM2
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 38
4484 Boeing Drive - Rockford, IL 61109
PM Series, Equal Flow Multi-Sections with Relief Valves
PPM2RV
FLOW DIVIDERS
Equal ow multi-section units consist of several identical, individual sections coupled together to divide a ow from a
common pump source into two or more equal ows. Each set of gear and shaft assemblies are individually supported in
needle bearings.
PM2RV & PM6RV
MODEL NUMBER OF
SECTIONS
TOTAL
M A X . I N L E T
(GPM)
0 PSI DISP. PER
SECT. GAL./REV,
SLIP
GPM/100
PSI
MAXIMUM
INTERMITTENT PSI
MAXIMUM
CONTINUOUS
PSI
BOLT
TORQUE
Ft.-Lb.
MAX. DIFF.
BETWEEN
SECT. (PSI)
MAXIMUM
RPM
MINIMUM
RPM
A
PM2RV 2 3.5 0.00047 0.026 2500 2000 13-17 1500 3500 500 0.23
PM6RV 2 9.5 0.00137 0.038 2000 1500 13-17 1000 3500 500 0.40
PPM2RV 4 7.0 0.00047 0.026 2000 1500 13-17 1000 3500 500 0.53
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 39
4484 Boeing Drive - Rockford, IL 61109
HPR Series, Heavy Duty with Relief Valves
RELIEF VALVE RELIEF VALVE
HYDRAULIC SCHEMATIC
(TWO SECTION SHOWN)
5000 PSI (345 Bar) Intermittent Duty
3000 PSI (206 Bar) Continuous Duty Note: HPR26-XX and HPR27-XX are 2000 PSI (137 Bar)
3000 PSI Delta P between Sections, Intermittently
Standard Setting on Relief Valves – 750 PSI Differential between Outlet and Inlet Pressure
Note that these relief valves do not offer system relief protection. They simply limit the pressure between the outlet and
inlet of the ow divider, and will aid in re-phasing whenever as section runs against a stop.
Standard Ports – 1 5/16 12 SAE Inlet, 1 1/16-12 SAE Outlet
FLOW DIVIDERS
WARNING: The specications/application data shown in our catalogs and data sheets are intended only as a general guide for the product described (herein).
Any specic application should not be undertaken without independent study, evaluations, and testing for suitability.
PHONE: (815) 397-6628 | FAX: (815) 397-2526 | WEB: www.delta-power.com | EMAIL: delta@delta-power.com
Page 40
4484 Boeing Drive - Rockford, IL 61109
FLOW DIVIDERS
HPR Series, Heavy Duty with Relief Valves
EQUAL FLOW
TWO SECTION
(2) SECTION
MODEL-
0 PSI DISPLACEMENT PER
SECTION GAL./REV,
DIMENSION
MAX. INLET @3500
RPM GPM [LPM]
A B
HPR21 0.00178 - - 12.4 GPM [47 LPM]
HPR23 0.00304 3.19 [81.0] 2.56 [65.0] 21 GPM [79 LPM]
HPR25 0.00425 - - 30 GPM [114 LPM]
HPR27 0.06330 3.96 [100.6] 3.34 [84.8] 44 GPM [166 LPM]
EQUAL FLOW
MULTI-SECTION
(4) SECTION
MODEL
0 PSI DISPLACEMENT PER
SECTION GAL./REV,
DIMENSION
MAX. INLET @3500
RPM GPM [LPM]
A B
HPR21-59 0.00178 2.89 [73.4] 2.26 [57.4] 25 GPM [95 LPM]
HPR23-59 0.00304 3.19 [81.0] 2.56 [65.0] 42 GPM [160 LPM]
HPR25-59 0.00425 3.47 [88.1] 2.85 [72.4] 59 GPM 223 LPM]
HPR26-59 0.00531 3.72 [94.5] 3.10 [78.7] 74 GPM [280 LPM]
HPR27-59 0.00633 3.96 [100.6] 3.34 [84.8] 88 GPM [333 LPM]
(3) SECTION
MODEL
0 PSI DISPLACEMENT PER
SECTION GAL./REV,
DIMENSION
MAX. INLET @3500
RPM GPM [LPM]
A B
HPR21-60 0.00178 - - 18.6 GPM [70 LPM]
HPR23-60 0.00304 - - 31.5 GPM [119 LPM]
HPR25-60 0.00425 - - 45 GPM [171 LPM]
HPR27-60 0.00633 - - 66 GPM [250 LPM]
Note: Dimension in [XX.X] are mm
FOR QUIETER OPERATION, LIMIT SPEED TO 2000 RPM
