Tandem Hydraulic Pumps Sauer Danfoss Hydraulic Pumps for Construction Machinery

• Type: Plunger Pump
• Product Name: Hydraulic Pump
• Displacement: 55-250cc
• Working Pressure Range: 350bar~400bar
• Control Type: Manual, Hydraulic, Electric for Option.
• Transport Package: Plywood Case
• Specification: Danfoss 90 Series
• Origin: China
• HS Code: 841391000

Product Description

Series 90 axial piston variable displacement pumps are of cradle swash plate design with variable displacement, and are intended for closed circuit applications. The flow rate is proportional to the pump input speed and displacement. The latter is infinitely adjustable between zero and maximum displacement. Flow direction is reversed by tilting the swash plate to the opposite side of the neutral (zero displacement) position.

Closed circuit
Size 030 042 055 075 100 130 180 250
Series 90
Maximum loads of 480 bar (6960 psi)
Controls device: CA, DC, DD, KA , KP, HF, MA, MB, etc.

Technical Data
Table of values (theoretical values, without efficiency and tolerances; values rounded)
Sauer 90		Dimension	90R030	90R042	90R055	90R075	90R100	90R130	90R180	90R250
			90L030	90L042	90L055	90L075	90L100	90L130	90L180	90L250
Displacement		cm3	30	42	55	75	100	130	180	250
		in3	1.83	2.56	3.35	4.57	6.1	7.93	10.98	15.25
Input speed	Minimum	min-1 (rpm)	500	500	500	500	500	500	500	500
	Rated	min-1 (rpm)	4 200	4 200	3 900	3 600	3 300	3 100	2 600	2 300
	Maximum	min-1 (rpm)	4 600	4 600	4  250	3 950	3 650	3  400	2  850	2 500
	Max. Attainable	min-1 (rpm)	5 000	5 000	4 700	4 300	4 000	3 700	3 150	2 750
Theoretical		Nm/bar	0.48	0.67	0.88	1.19	1.59	2.07	2.87	3.97
Torque		in lb/1000 psi	290	410	530	730	970	1 260	1 750	2 433
Mass moment of inertia of the int. rotating parts		kg m2	0.0023	0.0039	0.006	0.0096	0.015	0.023	0.038	0.065
		lb • ft2	0.0546	0.0926	0.1424	0.228	0.356	0.546	0.902	1.543
Weight (with MA Control)		kg	28	34	40	49	68	88	136	154
		lb	62	75	88	108	150	195	300	340