Page 2 - Parker - Hydraulic Motor/Pump

Catalogue HY30-8249/UK Hydraulic motor/pump
Series F11/F12

Basic formulas for hydraulic motors

Flow (q)
D x n
3
q = v [l/min] D - displacement [cm /rev]
1000 x η

n - shaft speed [rpm]
η - volumetric efficiency
v
Torque (M) ∆p - differential pressure [bar]
D x ∆p x η
M = hm [Nm] (between inlet and outlet)
63 η hm - mechanical efficiency
η - overall efficiency
Power (P) t (η = η x η )
q x ∆p x η t v hm
P = t [kW]
600
Basic formulas for hydraulic pumps
Flow (q)
D x n x η
3
q = 1000 v [l/min] D - displacement [cm /rev]
n - shaft speed [rpm]

η - volumetric efficiency
v
Torque (M) ∆p - differential pressure [bar]
M = D x ∆p [Nm] (between inlet and outlet)
63 x η hm η - mechanical efficiency
hm
η - overall efficiency
Power (P) t (η = η x η )
q x ∆p t v hm
P = [kW]
600 x η t
Conversion factors Conversion factors
1 kg ................................................................. 2.20 lb 1 lb ............................................................... 0.454 kg
1 N ............................................................... 0.225 lbf 1 lbf ................................................................4.448 N
1 Nm ......................................................... 0.738 lbf ft 1 lbf ft ..........................................................1.356 Nm
1 bar ..............................................................14.5 psi 1 psi ......................................................0.068948 bar
1 l ......................................................0.264 US gallon 1 US gallon ..................................................... 3.785 l
3
1 cm .......................................................0.061 cu in 1 cu in .....................................................16.387 cm 3
1 mm ............................................................. 0.039 in 1 in ............................................................... 25.4 mm
5
9
1°C ............................................................. / (°F-32) 1°F ............................................................ / °C + 32
9
5
1 kW .............................................................. 1.34 hp 1 hp...........................................................0.7457 kW
WARNING – USER RESPONSIBILITY

FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS
CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide
product or system options for further investigation by users having technical expertise.
The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components
and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The
user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning
the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized
distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or
specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and
sufficient for all applications and reasonably foreseeable uses of the components or systems.

Offer of Sale

Please contact your Parker representation for a detailed ”Offer of Sale”.

2 Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden