hydraulic piston pump decription: Size: 18-140 Nominal pressure: 280Bar Swash plate design axial variable piston pump

HWA10VSO hydraulic  piston pump description:

(1).Swash plate design axial variable piston pump used in open circuit.

(2).Continuous work pressure can reach 280bar,the highest instantaneous work pressure can reach 350bar.

(3).The flow is directly proportional to the drive rotate speed and the displatement,and can make stepless variable come true by adjusting the obliquity of the swash plate.

(4).Wide range of controls such as DR,DFLR etc.Short response times.

(5).Low noises level,High efficiency,High reliability and long time service life.

(6).Small volume,High power density.

(7).Excellent oil absorbency.

(8).Axial and radial loading of drive shaft possible.

(9).SAE and ISO mounting flange.

(10).Thru drive option for multi-circuit system

The HWWA10VSO variable displacement pump is suitable for use with mineral oil.

Operating viscosity rangeIn order to obtain optimum efficiency and service life, we recommend that the operating viscosity(at operating temperature) be selected from within the range.Vopt=operating viscosity16…36mm2/sReferred to the reservoir temperature(open circuit)

Viscosity limitsVmin=10mm2/s short term at a max. permissible drain of 90°C.Vmax=1000 mm2/s short term on cold start Temperature range(see selection diagram):t=-25~90°C

Note on the selection of the hydraulic fluid.In order to select the correct fluid, it is necessary to know the operating temperature in the tank (open loop) in relation to the ambient temperature.The hydraulic fluid should be selected so that within the operating temperature range, the operating viscosity lies within the optimum range(Vopt)(see shaded section of the selection diagram ).We recommend that the higher viscosity range should be chosen in each case.

FiltrationThe finer the filtration the better the cleanliness of the pressure fluid and the longer the life of the axial piston unit. To ensure the functioning of the axial piston unit a minimum cleanliness level of:9 to NAS 1638 18/15 to ISO/DIS4406 is necessary.

Size	DimensionsA(B)  ISO(4)-hole					DimensionsC(D)  SAE 2 (4) –hole					A4	A5	A6
	A1	A3	B2	B10	L(L1)	A1	A3	B2	B10	L(L1)
18	80h8	109	7	11	M16×1.5	82.55h8	106.4	6.3	11	9/16-18UNF	134	25	20
28	100h8	140	9	14	M18×1.5	101.6h8	146	9.5	φ14	3/4-16 UNF	174	32	20
45	100h8	140	9	14	M22×1.5	101.6h8	146	9.5	φ14	7/8-14 UNF	174	40	25
71	125h8	180	9	18	M22×1.5	127h8	181	12.7	φ18	7/8-14 UNF	210	50	25
100	125h8	180	9	17.5	M27×2	127h8	181	12.7	17.5	11/16-12 UNF	210	60	32
140	180h8	158.4×158.4	9	φ18	M27×2	152.4h8	161.6×161.6	12.7	φ20	11/16-12 UNF	200×200	63	32
size	Ports at opposite sides SAE						ports at rear SAE						Metric(UNC)threads
	B1	B8	B9	B18	B19	B20	B1	B8	B9	B18	B19	B20	A7	A8	AA8
18	195	145	63	109	40	130							M10(3/8-16UNC)	M10(3/8-16UNC)
28	206	164	80	119	40	140	225	170	45	73	43	209	M10(7/16-14UNC)	M10(3/8-16UNC)
45	224	184	90	129	40	155	244	189	50	81.5	40	228	M12(1/2-13UNC)	M10(3/8-16UNC)
71	259	217	104	143	40	183	278	223	58	91.5	40	262	M12(1/2-13UNC)	M10(3/8-16UNC)	M10(7/16-14UNC)
100	329	275	100	148	40	250	344	288	55	99	40	327	M12(1/2-13UNC)	M14(1/2-13UNC)
140	337.5	275	110	183	27	222	379	293	60	140	27	353	M12(1/2-13UNC)	M14(1/2-13UNC)

hydraulic piston pump