Guizhou Liyuan Hydraulic Co.,Ltd.

LY-A4VS0125DR/20R-PPB Variable Displacement Pump——Technical Data

●A4V pump Technical data Form(Theoretical values,without considering ym and yv)
Size					40	56	71	90	125	250
Displacement	Variable Pump		Vgmax	ml/r	40	56	71	90	125	250
Displacement	Boost Pump		Vgn	ml/r	8.4	11.4	19.0	19.0	26.4	52.5
Speed	Max.speed		nmax	r/min	3700	3400	3200	2900	2600	2000
Speed	Min.speed		nmax	r/min	500	500	500	500	500	500
Flow	Variable Pump		Qmax	l/min	148	190	227	261	325	500
	Boost Pump		Qmax	l/min	31	39	61	55	69	105
	Variable Pump		Q	l/min	58	81	103	131	181	363
	Boost Pump		QH	l/min	12	17	28	28	38	76
Horsepower	Variable Pump	ΔP=40MPa	Pmax	kW	99	127	151	174	217	333
	Boost Pump	ΔP=2.5MPa	Phmax	kW	1.3	1.6	2.5	2.3	2.9	4.4
	Variable Pump	ΔP=40MPa	P	kW	39	54	69	87	121	242
	Boost Pump	ΔP=2.5MPa	PH	kW	0.5	0.7	1.2	1.2	1.6	3.2
Torque	Variable Pump	ΔP=40MPa	Mmax	Nm	254	356	452	572	795	1590
Torque	(Without Boost Pump)	ΔP=10MPa	M	Nm	63.6	89	113	143	199	397.5
Moment of inertia(About drive axis)			J	kgm2	0.0049	0.0085	0.0121	0.0175	0.03	0.0959
Transforming Time	Orifice transforming time at place X1,X2	0-Vgmax		s	1.0	1.0	2.0	1.2	1.2	2.5
		Vgmax-0		s	1.0	1.0	1.2	1.2	1.2	1.8
		Φ		mm	0.8	0.8	1.0	1.0	1.0	2.2
	Standard model	0-Vgmax		s	0.5	0.5	1.2	0.5	0.5	1.5
	Without Orifice transforming time	Vgmax-0		s	0.4	0.4	0.7	0.5	0.5	1.0
Weight(Standard model,without through drive)			m	kg(ca.)	30	37	54	54	75	160

●Permissible axial and radial loads on drive shaft
Size				40	56	71	90	125	250
Distance from the center of force (From the convex step)		a	mm	17.5	17.5	20	20	22.5	29
		b	mm	30	30	35	35	40	50
		c	mm	42.5	42.5	50	50	57.5	71
Max.perm.radial for on deviate distance	a	FRmax	N	3600	5000	6300	8000	11000	22000
	b	FRmax	N	2891	4046	4950	6334	8594	16809
	c	FRmax	N	2416	3398	4077	5242	70510	13600
Max.perm.axial force		±FAmax	N	1500	2200	2750	3500	4800	6000

Operation pressure range-Inlet side
Absolute pressure S port (Suction inlet)
Pabs min……………………… 0.08MPa
Pabs max……………………… 3MPa
Operation pressure range-Inlet side
Pressure B port
Rated pressure P　…………35MPa
Peak pressure Pmax ………40MPa
Housing drain pressure
Max.drain pressure(At port L, L1)
The pressure of suction port,can not exceed the absolute pressure
at S port 0.2MPa。
Port S to port B
DR constant pressure control
The pressure control maintains the pressure in a hydraulic systemconstant

within the control range of the pump,it keeps the max.pressurevalue in the

system and its setting range is 2-3Mpa.

Table Of Values

SIZE				125
Displacement		Vgmax	cm3	125
Max.speed	at Vgmax	n0max	rmp	2200
Max.flow	在n0max	Q0max	L/min	218
Max.power	在n0max	P0max	kW	131
Max.torque	在Vgmax	Tmax	N.m	696
Approx.weight(Without oil fill)		m	kg	88