VQ series single pumps
High performance composition vane pumps for walking machinery
The series high pressure resistant composition vane pumps with high performance are developed for engincering machinery application, especially for walking machinery. The main features are as follows:
1. Adopt the structure of hydraulic balancing composition vanes, making the resistant pressure higher to maximum 21 Mpa.
2. Adopt the structure of floating side plate supporting with its function of automatic tolerance compensation, which helps to get pressure balance and high performance under high rotation speed and high pressure.
3. Adopt bimetal flexible material for side plates, which dramatically improves the engagement performance of the gears and thus makes the pump working better and longer.
|♦Displacement codes||Pump port
|Mounting type||shaft extension||Outlet port position||Designing No.||Direction of rotation|
ester fatty of acid
（from cover end pump）
C.the same side of inlet
|30||（from shaft cnd
♦The rated displacement (USgpm) is under the conditions of 1200r/min and 0.69 Mpa（100psi）.
Q series single pumps
Typical outletflow |T
under Max speedand ur
Typical outlet power
under Max speed and
Performance parameters: SAE 10W hydraulic fluid ♦82℃(180"F), pump inlet ♦0 PSIG(14.71/Psia ) Notes: The pressure of outlet port must be higher than the one of inlet port.
Characteristic curve with 10W type oil(26cst)under 50℃ and no load
20VQ output flow,input power
25Va output flow,input power
45VQ output flow,input power
35VQ output flow,input power
Operation and Maintenance
It is recommended to adopt anti-wear hydraulic fluids with viscosity of 32est-68est under the temperature of 40℃, or automobile crankcase oil with alphabetic marks of SC, SD, SE or SF. The recommended viscosity under rated rotation speed and rated pressure should range from 13est to 54est with the temperature range of 49℃ to 65℃.
In the case of adopting SAE l0W type hydraulie oil with viscosity between 860cst and 5est, the operating rotation speed and pressure shall be limited within 50% of rated rotation speed and rated pressure respeetively, until the system warms up. Particular attention should be paid to make sure that the whole system including the cylinder and motor on the far away side shall be all warmed up, when the pump starts up with the hydraulic oil viscosity exceeding 860cst.
♦High temperature operation
While working under high temperature, the viscosity shall not be less than I 3est, and the temperature shall not exceed 99 ℃. Otherwise, the service lifetime of pump core components and sealing parts will be reduced.