Danfoss V20H Square Vane Pump User Guide
- June 1, 2024
- Danfoss
Table of Contents
ENGINEERING
TOMORROW
User guide
Vickers® by Danfoss
V20H Vane Pump
Up to 204 bar (3000psi)
15.8-41.7 cc/rev, (5 – 13 gpm @ 1200 rpm)
BC469985753506en-000201
Introduction
Series V20H fixed displacement pumps are of Vickers “balanced vane type”
construction. V20H single pumps have rated flow capacities of 5 to 13 USgpm.
V20H are available in double pump configurations (V2020H). These double pumps
provide a single power source capable of serving two separate hydraulic
circuits, or of providing greater volume through the combined delivery of both
sections. In either type of application, two pumps in a single housing result
in a more compact, simple installation and can be driven through a single
shaft coupling.
All models are designed for use with oil or synthetic fire-resistant fluids.
Shaft rotation is either clockwise or counterclockwise, but can be changed by
changing the assembly of internal parts.
SAE 2-bolt mounting flanges are standard, and foot-mounting brackets are
optional. Many electric motor manufacturers can supply drip-proof or totally
enclosed, fan cooled motors with end bells on which the pumps can be mounted.
Features and Benefits
Unmatched Durability
Whether in heavy duty industrial machinery or mobile applications, Vickers by Danfoss vane pumps are built to endure the toughest operating conditions. The design and build materials are field proven, with years of service in the most rugged applications. This longevity not only minimizes maintenance requirements but also maximizes uptime, contributing to overall operational efficiency.
High Performance
Low vane tip/ring loading allows high pressure operation. High speeds are
possible because the inlet flow paths are designed to give uniform oil
acceleration, and thus better filling characteristics, particularly at low
inlet pressures.
Extended Product Life
Vickers Vane Pump advanced design includes features that contribute to
efficient fluid handling and reduced wear to deliver the consistent
performance needed for optimal system functionality over time.
Low Cost
Vickers’ optimized design requires less horsepower per dollar invested,
providing the industry with an unparalleled price-toper formance ratio.
Versatility
High flow, pressure and speed capabilities enable these pumps to meet the
hydraulic circuit needs of many types of modern machinery.
Basic Performance Data
Typical operating characteristics at 1200 r/min with petroleum oil
Ring size Data based on performance at oil temperature of 49° C (120° F),
viscosity 32 cSt at 38° C (150 SUS at 100° F)
| 7 bar (100 psi) | 69 bar (1000 psi) | 138 bar (2000 psi) | 204 bar (3000 psi) |
|---|---|---|---|
| V20H single pump | Lpm (USgpm) | Input kW (hp) | Lpm (USgpm) |
| Input kW (hp) | Lpm (USgpm) | Input kW (hp) | Lpm (USgpm) |
Input
kW (hp)
---|---|---|---|---|---|---|---|---
– 5| 18.4 (4.9)| 0.2 (0.3)| 16.6 (4.4)| 1.9 (2.5)| 14.9 (3.9)| 3.43 (4.6)|
13.4 (3.5)| 4.6 (6.2)
– 6| 22.3 (5.9)| 0.3 (0.3)| 20.8 (5.5)| 2.4 (3.2)| 19.6 (5.2)| 4.5 (6.0)| 18.1
(4.8)| 6.1 (8.2)
– 7| 26.3 (6.9)| 0.3 (0.4)| 25.1 (6.6)| 2.9 (3.9)| 24.2 (6.4)| 5.56 (7.5)|
22.8 (6.0)| 7.9 (10.6)
– 8| 30.2 (8.0)| 0.4 (0.5)| 28.4 (7.5)| 3.3 (4.4)| 26.9 (7.1)| 6.18 (8.3)|
25.1 (6.6)| 8.6 (11.6)
– 9| 34.1 (9.0)| 0.4 (0.5)| 31.8 (8.4)| 3.7 (4.9)| 29.5 (7.8)| 6.79 (9.1)|
27.3 (7.2)| 9.4 (12.6)
– 10| 38.0 (10.1)| 0.4 (0.6)| 35.4 (9.4)| 4.1 (5.5)| 32.8 (8.7)| 7.54 (10.1)|
30.3 (8.0)| 10.4 (14.0)
– 11| 42.0 (11.1)| 0.5 (0.6)| 39.1 (10.3)| 4.5 (6.0)| 36.1 (9.5)| 8.29 (11.1)|
33.2 (8.8)| 11.5 (15.4)
– 12| 45.6 (12.1)| 0.5 (0.7)| 42.3 (11.2)| 4.9 (6.5)| 39.3 (10.4)| 9.03
(12.1)| 36.0 (9.5)| 12.4 (16.7)
– 13| 49.3 (13.0)| 0.6 (0.8)| 45.5 (12)| 5.2 (7.0)| 42.5 (11.2)| 9.76 (13.1)|
38.8 (10.3)| 13.4 (18.0)
Maximum speeds & pressures using fire-resistant fluids
Ring size| Maximum speed by fluid type – r/min| Maximum pressure by fluid type
– bar (psi)
---|---|---
| Water-glycol and water-in-oil emulsion| **Synthetic fluid| **
Water glycol
| Water-in-oil emulsion| **Synthetic fluid**
---|---|---|---|---|---
5, 6, 7, 8, 9| 1800| 1800| 124 (1800)| 109 (1575)| 138 (2000)
---|---|---|---|---|---
11| 1800| 1500| 109 (1575)| 93 (1350)| 138 (2000)
12, 13| 1800| 1500| 109 (1575)| 93 (1350)| 124 (1800)
NOTE : 3 inches of Hg is the maximum inlet vacuum for the maximum speeds above. See page 24 for complete application details.
Speed rating per inlet condition
Maximum operating speeds shown on performance curves are for pumps operating
at 0 psi inlet condition. To compute maximum operating speeds at other inlet
conditions, use appropriate speed rating correction factor shown on the curve
on the right.
Example:
Max. speed @ 0 psi inlet
Correction factor @ 5 in. Hg
Max. speed @ 5 in. Hg inlet
Pump inlet suction should not exceed 5 in. Hg vacuum for petroleum oil or 3 in. Hg vacuum for other fluid types. Positive pressure on inlet should not exceed 10 psi.
Single Pumps
Model Code
Note : Some options may require additional lead time. Please contact sales representative for details.
-
Product Type
V20 – V20 Single series vane pump -
Pressure Type
H – High Pressure -
Cover Type
S – Standard Cover
P – Priortiy Valve Cover with RV
F – Flow Control Cover with RV
N – Flow control with internal drain cover
with RV
D – Directional control valve manifold
R – Pressure relief cover -
Mounting Flange Type
01 – 2 Bolt flange SAE -A size
04 – Face mounting
06 – 2 Bolt flange SAE-B Size -
Inlet Port Type
P – 1.25” NPT Thread
S – 1.625-12 UN-2B SAE O-Ring port (SAE#20)
D – 1.3125-12 UN-2B SAE O-Ring port
(SAE#16)
F – 29.37(1.156) DIA 2 Bolt flange
R – 1” NPTF THD
E – 38.1(1.50) DIA 2 Bolt flange
B – G1.250 BSPF Thread
M – M26 X 1.5 Metric O-Ring port
N – M42 X 2.1 Metric O-Ring port
W – 1” Port 4 Bolt Flange, Code 61 -
Ring Capacity
05 – 5 USgpm
06 – 6 USgpm
07 – 7 USgpm
08 – 8 USgpm
09 – 9 USgpm
10 – 10 USgpm
11 – 11 USgpm
12 – 12 USgpm
13 – 13 USgpm -
Outlet Port Type
B – G0.750 BSPF Thread
P – .750 NPT Thread
S – 1.0625-12 UN-2B SAE O-Ring port (SAE#12)
Y – 0.875-14 UN-2B SAE O-Ring port (SAE#10)
R – 1.1875-12 UN-2B SAE O-Ring port (SAE#14)
F – 0.687 2 Bolt flange
T – Primary port- .750-16 UN-2B,Secondary port-.875-14 UN-2B, Tank port- .750-16 UN2B
G – 2X .500 NPT With .250 NPT gage port
H – M27 X 2.0 Metric O-ring port
M – M16 X 1.5 Metric O-ring port
K – 1.3125-12 UN-2B SAE O-ring port (SAE#16)
A – Pressure port -.750-16 UN-2
B, Tank port -.500 NPT
C – Pressure port -.750-16 UN-2B, Tank port1.0625-12 UN-2B
D – Pressure port: .750-16 UN-2B, Tank port- .750-16 UN-2B
E – Pressure port: G .750 BSPF THRD, Tank port : G .750 BSPF THRD
J – Pressure port: M18 X 1.5 THD, Tank port : M18 X 1.5 THD
W –0.5” Port 4 Bolt Flange, Code 61 -
Shaft Seal and Bearing
B – Single lip seal and sealed bearing
S – Dual lip seal and open bearing -
Shaft Type
000 – Key threaded.875-18 UNS-2A, DIA-1”, length- 1.89”, shaft #0
001 – Straight keyed , DIA-.750”, Length- 2.66”, shaft #1
003 – Key threaded.875-18 UNS-2A, DIA.9380”, length- 2.8”, shaft #3
006 – Woodfruff keyed, DIA- .7485”, length- 1.25”, shaft #6
011 – Involute splined 11T 16/32 pitch, major DIA-.733”, length- 2.935”, shaft11
015 – Involute splined 13T 16/32 pitch, major DIA-.873”, length- 1.69”, shaft
15
018 – Involute splined 9T 16/32 pitch, major DIA-.623”, length- 1.25”, shaft
18
022 – Woodruff keyed , DIA-.875”, length- 1.750”, shaft #22
023 – Involute splined 13T 16/32 pitch, major DIA-.873”, length- 1.750”, shaft23
027 – Tang, DIA- .950”, length-1.076”, Shaft #27
030 – Tang, DIA- .950”, length-2.0 “, shaft #30
037 – Involute splined 11T 16/32 pitch, major DIA-.733”,length- 1.750”, shaft37
038 – Involute splined 11T 16/32 pitch, major DIA-.733”, length- 1.25”, shaft
38
039 – Involute splined 13T 16/32 pitch, major DIA-.858”,length- 1.67”, shaft
39
055 – Involute splined 11T 16/32 pitch, major DIA-.733”, length- 1.250”, shaft
55
062 – Involute splined 9T 16/32pitch, major DIA-.608”, length- 1.245”, shaft
62
070 – Straight Keyed, DIA-.750,length-1.875”, shaft #70
072 – Straight Keyed, DIA-.750, length-1.758”, shaft #72
079 – Straight Keyed, 1/4 – 28 UNF-2B Hole in end , shaft #79
090 – Involute splined 11T 16/32 pitch, major DIA-.733”length- 1.50” shaft #90
103 – Woodruff key threaded.875-18 UNS2A, DIA-.9380”, SHAFT #3, length-2.795”, shaft #103
111 – Involute splined 13T 16/32 pitch, major DIA-.873”,length- 1.448”, shaft111
138 – Involute splined 11T 16/32 pitch, major DIA-.733”,length- .915”, shaft
138
238 – Involute splined 11T 16/32 pitch, major DIA-.733”,length-1.25”, shaft
238
NOTE : Underlined shaft options denotes standard options
-
Outlet Port Orientation
A – Opposite to inlet port
B – 90° CCW From inlet port
C – Inline with inlet port
D – 90° CW from inlet port -
Flow Rate Thru Orifrce Cover
00 – No flow control
02 – 2 GPM
03 – 3 GPM
04 – 4 GPM
45 – 4.5 GPM
05 – 5 GPM
06 – 6 GPM
65 – 6.5 GPM
07 – 7 GPM
08 – 8 GPM
09 – 9 GPM
10 – 10 GPM
11 – 11 GPM
12 – 12 GPM -
Relief Pressure Setting
A – 250 PSI
B – 500 PSI
C – 750 PSI
D – 1000 PSI
E – 1250 PSI
F – 1500 PSI
G – 1750 PSI
H – 2000 PSI
M – 2150 PSI
J – 2250 PSI
R – 2300 PSI
P – 2400 PSI
K – 2500 PSI
L – 2750 PSI
N – 3000 PSI
Z – No pressure setting -
Seals Type
A – NBR Seals
B – Viton -
Shaft Rotation
L – LH CCW Rotation viewed from shaft end
R – RH CW Rotation viewed from shaft end -
Special Feature Suffix
000 – No Special Feature
Contact sales team for specific options -
Paint Type
A – Standard black per 504H0335
Z – No Paint -
Customer Identification
Z – Non-specific -
Design Code
31 – Design Code
Specifications
V20H Typical Performance Data : 1200 RPM
Based on using petroleum oil at 49° C (120° F), viscosity 32 cSt at 38° C (150
SUS at 100° F), and 0 psi inlet pressure
Model series| Ring size| Displ.| Max. Speed| Maximum
pressure| Typical delivery| Typical input power| Weight
---|---|---|---|---|---|---|---
| (Delivery USgpm @ 1200 r/min
& 100 psi) | cm 3 /r (in 3
/r)| r/min| bar (psi)| L/min (USgpm)
@ max. speed
& pressure | kW (hp) @
max. speed
& pressure | kg (lb)
V20H| 5| 15.8 (1.0)| 3400| 204 (3000)| 47.1 (12.4)| 16.2 (21.8)| 7.3 – 8.2
(16 – 18)
6| 19.1 (1.2)| 3400| 204 (3000)| 59.3 (15.7)| 20.4 (27.4)
7| 22.4 (1.4)| 3000| 204 (3000)| 62.6 (16.5)| 21.6 (29.0)
8| 25.6 (1.6)| 2800| 204 (3000)| 65.2 (17.2)| 22.5 (30.1)
9| 28.9 (1.8)| 2800| 204 (3000)| 72.2 (19.1)| 24.9 (33.4)
10| 32.4 (2.0)| 2500| 204 (3000)| 70.7 (18.7)| 24.4 (32.7)
11| 36.0 (2.2)| 2500| 204 (3000)| 77.4 (20.4)| 26.7 (35.8)
12| 38.7 (2.4)| 2400| 204 (3000)| 80.0 (21.1)| 27.6 (37.0)
13| 41.7 (2.5)| 2400| 204 (3000)| 85.6 (22.6)| 29.5 (39.6)
V20H Dimensions
Millimeters (inches)
See page 8 for foot mounting dimensions.
Ring size| Dimension|
---|---|---
| A| B
5| 125.1 (4.92)| 102.2 (4.02)
6| 125.1 (4.92)| 102.2 (4.02)
7| 131.4 (5.17)| 108.6 (4.27)
8| 131.4 (5.17)| 108.6 (4.27)
9| 131.4 (5.17)| 108.6 (4.27)
10| 136.4 (5.37)| 113.6 (4.47)
11| 136.4 (5.37)| 113.6 (4.47)
12| 139.9 (5.51)| 117.1 (4.61)
13| 139.9 (5.51)| 117.1 (4.61)
Foot Bracket Kit
Dimensions
Millimeters (inches)
Note : Each kit includes screws for mounting pump to bracket.
Model| A| B| C| D| E| F| ø G| ø
H| J
---|---|---|---|---|---|---|---|---|---
FB-A-10| 134.9 (5.31)| 69.8 (2.75)| 152.4 (6.00)| 76.2 (3.00)| 127.0 (5.00)|
63.5 (2.50)| 106.37 (4.188)| 82.63 (3.253)| .375-16
FB-B-10| 180.8 (7.12)| 92.2 (3.63)| 171.4 (6.75)| 85.7 (3.38)| 146.0 (5.75)|
73.1 (2.88)| 146.0 (5.75)| 101.68 (4.003)| .500-13
V20H Typical Performance
Oil temp. 49°C (120°F), viscosity 32 cSt (150 SUS) @ 38°C (100°F), inlet pressure zero
Application and Service Information
Minimum Speed
Minimum recommended starting speed is generally 600 r/min.
However, the pump size, system characteristics and environmental conditions
can raise or lower this speed. A lower speed can often be achieved after the
pump has primed.
If low starting or operating speeds are required, consult your Danfoss
representative.
Inlet Pressure
Recommended inlet pressure is 0 to 0.34 bar (0 to 5 psi) gauge at maximum
operating speeds. Inlet pressure should not exceed 0,69 bar (10 psi). Inlet
depressions should not exceed 5 inches of Hg with petroleum oil, or 3 inches
of Hg with all other fluids.
A pressurized reservoir system does not always assure a positive (supercharge)
pressure at the pump inlet. Vacuum at the pump inlet can result during cold
start-ups. Avoid high speeds until the circuit has warmed and supercharge
pressure actually exists at the pump inlet.
Drives
Vickers by Danfoss pumps are designed for use on direct coaxial drives. If
drives imposing radial or axial loads are being considered, consult your
Danfoss representative for additional information.
Concentricity and angular alignment of shafts are important to pump life.
Misalignment can induce heavy loads on bearings, causing premature failure.
Flexible coupling halves must be aligned according to the coupling
manufacturer’s recommendations.
When using double universal joint couplings, the shafts must be parallel and
the yokes must be in line. The offset should be kept as low as possible.
Maximum allowable offset will, of course, vary with application conditions.
The pump shaft to universal joint diametral fit should be close (major
diameter fit) with no looseness.
Mounting Dimensions
Concentricity of the customer’s female pilot diameter relative to the
effective axis of the female drive must be within 0.10 mm (.004 in.) total
indicator reading. The clearance between the male and female pilot diameters
must be +0.01 to +0.05 mm (+.0005 to +.0020 in.).
The customer’s mounting face to which the pump is affixed must be square to
the axis of the female drive within 0.04 mm per mm (.0015 in. per in.).
Dimensions of the customer’s keyed shaft receiver must be between +0.003 and
+0.025 mm (+.0001 and +.0010 in.) of the maximum shaft diameter shown on the
Vickers installation drawing.
Valves and Circuitry
Protect against hydraulic surge pressures (inlet or outlet) applied to or
generated by the pump. Relief valves must prevent these surges from exceeding
published pressure ratings.
Never assume a relief valve setting is the maximum pressure a pump
experiences. Shock conditions may exist which can exceed circuit and pump
limitations.
Shaft Loading
Never assume pumps in a double pump assembly can be simultaneously loaded to
rated pressure. Shaft loading must be checked for excessive torque and side
loads.
Piping
Hydraulic lines should be as short and have as large an inside diameter as
possible. Where lines are long, it is desirable to adapt to a larger capacity
line than a unit’s ports specify. Inlet, outlet and drain lines should not be
smaller than the nominal port size shown on installation drawings. A “Y”
shaped inlet should not be used to feed two separate pumps because one may be
starved and cavitate.
There should be as few bends and fittings in lines as possible. High pressure
lines and fittings are restrictive to flow and may result in excessive
pressure drop through the system. They should be used only where necessary in
a pressure line.
Hose
When installing a hose, allow enough slack to avoid kinking. A taut hose will
not allow movement with pressure surges. Slack in the line compensates for
surges, relieving strain. The hose should not be twisted during installation
or while in operation. Twisting will weaken the hose and loosen connections.
A neater installation is usually obtainable by using extra fittings to
minimize unusually long loops in a line. Hoses should be clamped to prevent
rubbing and entanglement with moving parts. Where hoses are subject to
chafing, they should be run through protective neoprene hose or shielded
metallic guards.
Hydraulic Fluids
Pumps can be used with anti-wear hydraulic oil, or automotive type crankcase
oil (designations SC, SD, SE, SF, or SG) per SAE J183 202007.
Fire-resistant fluids can also be used, but may require the use of special
seals as explained in the following “Seals” section.
The viscosity range of petroleum oil, with the pump running, should be 13-54
cSt (70-250 SUS). The oil viscosity at 38° C (100° F) should be 32-48 cSt
(150-225 SUS).
Fire-resistant fluids should have a viscosity as close as possible to that of
petroleum oil as described above. A maximum specific gravity of 1.3 is
suggested for fire-resistant fluids.
An operating temperature of 49° C (120° F) is recommended. The maximum
temperature for oil should be 65° C (150° F), and the maximum for water-
containing fluids should be 130° F.
For additional fluid and temperature information, reach out to your Danfoss
sales representative.
Seals
Nitrile seals are suitable for use with petroleum, water-glycol, waterinoil
emulsion, polyolester, and high-water-base fluids. Phosphate ester
fluids require the use of fluorocarbon seals, which are identified in model
codes.
Fluid Cleanliness
Proper fluid condition is essential for long and satisfactory life of
hydraulic components and systems. Hydraulic fluid must have the correct
balance of cleanliness, materials and additives for protection against wear of
components, elevated viscosity and inclusion of air.
Recommended cleanliness levels, using petroleum oil under common conditions,
are based on the highest fluid pressure levels in the system and are coded in
the chart below. Fluids other than petroleum, severe service cycles, or
personnel safety considerations are cause for adjustment of these cleanliness
codes.
Vickers by Danfoss products, as any components, will operate with apparent
satisfaction in fluids with higher cleanliness codes than those described.
Other manufacturers will often recommend levels above those specified.
Experience has shown, however, that life of any hydraulic components is
shortened in fluids with higher cleanliness codes than those listed below.
These codes have been proven to provide a long trouble-free service life for
the products shown, regardless of the manufacturer.
| Product | System Pressure Level – bar (psi) |
|---|---|
| <70 ( <1000) | 70-210 (1000-3000) |
| Vane Pumps – Fixed | 20/18/15 |
| Vane Motors | 20/18/15 |
Aeration
Reservoir and circuit design must prevent aeration of the fluid. Particular
care must be used to employ joints, seals and gaskets that will not leak or
deteriorate. This is especially important in low pressure and suction lines.
Connections should always be tight to prevent air from entering the system.
It is best to use windows and sight glasses in the reservoir and inlet lines
during prototype evaluation to determine whether significant amounts of air
are present in the fluid. Any opaqueness or milky appearance of the fluid in
the lines or reservoir indicates excessive aeration. Bubbles on the surface of
the reservoir fluid may indicate that excessive aeration is present.
Reservoir
The oil level of the reservoir should be as high as possible above the pump
suction line opening. All return lines should discharge near the tank bottom,
always below the oil level, and as far from the pump inlet as possible.
Reservoirs should incorporate a sight gauge, dipstick or other means for easy
checking of the oil level. Without these devices, the oil level often goes
unchecked and, should a leak occur, the pump can be starved and damaged from
loss of lubrication.
Preferably, reservoirs should be located above pumps. This creates a flooded
pump inlet which reduces the possibility of pump cavitation.
Pump suction and tank return lines should be attached to the reservoir by
flanges or welded heavy-duty coupling. If the suction line is connected to the
bottom of the reservoir, the coupling should extend above the bottom inside
the tank. This prevents residual dirt from getting into the suction line when
the tank is cleaned. The seals used on all suction line connections should be
such that they will not deteriorate and leak.
A baffle plate in the reservoir is desirable to separate the suction and
return lines. The plate causes return oil to circulate around the outer wall
of the reservoir for cooling before it re-enters the pump.
It also helps provide time for entrained air to separate from the oil.
Baffle plate openings should be designed so that cascade effects and resultant
air entrainment are minimized.
Most reservoirs are vented to the atmosphere through an opening that lets air
leave or enter the space above the oil as the oil level rises or falls. A
filler/breather unit containing an air filtering element is often used as the
vent. It must be large enough to handle the air flow required to maintain
atmospheric pressure whether the tank is full or empty.
Startup
Before starting, fill the pump with system fluid through the uppermost port.
The housing must be kept full at all times to provide internal lubrication.
At initial startup, it may be necessary to bleed air from the pump outlet to
permit priming and reduce noise. Bleed by loosening an outlet connection until
a solid stream of fluid appears. An air bleed valve for this purpose is
available through your Danfoss representative.
Application Guidance
To ensure optimum pump performance in conjunction with your specific
application, consult your Danfoss representative if your:
- Application requires an indirect drive
- Fluid does not meet specifications
- Mounting attitude is other than horizontal
- Oil viscosity at operating temperature is not within 13-54cSt
- (70-250 SUS)
- Oil viscosity at startup is in excess of 220 cSt (1000 SUS)
- Needs require application assistance
Service Information
Refer to powesource.danfoss.com for service information.
ENGINEERING
TOMORROW
Danfoss Power Solutions, Nord borgvej 81, 6430 Nordborg, Denmark, Tel. +45 74
88 22 22, Fax +45 74 65 25 80
www.danfoss.com, E-mail:
info@danfoss.com
Support E-mail:
industrialpumpsmotorsupport@danfoss.com
© 2024 Danfoss
All Rights Reserved
Printed in USA
DAM No: BC469985753506en-000201
March 2024