CAT PV2R Series Hydraulic Double Vane Oil Pump for Industrial Machinery

CAT PV2R Series Hydraulic Double Vane Oil Pump For Industrial Machinery

 

Industrial machinery-such as injection molding machines, press machines, and conveyor systems-relies on stable hydraulic oil supply to drive clamping, pressing, and material conveying actions. The CAT PV2R Series Hydraulic Double Vane Oil Pump is engineered to be the "oil supply hub" of these systems, delivering continuous, low-pulse hydraulic flow. As a Double Vane Pump, it features two sets of symmetrically arranged vanes that rotate in sync, reducing flow fluctuations to within ±3%-critical for precision tasks like injection molding, where stable oil pressure ensures uniform product thickness.​

The PV2R series, a classic model in CAT's hydraulic product line, inherits the brand's strict quality standards. Its pump body is cast from high-strength gray iron, with internal flow channels optimized through computational fluid dynamics (CFD) simulations to minimize pressure loss. The cat pv2r is tailored to industrial machinery's long-running needs, with a design that supports 24/7 continuous operation without performance degradation-ideal for automated production lines that require uninterrupted workflow.​

 

The cat pv2r pump stands out for its Double Vane Pump design, which doubles the oil suction and discharge efficiency compared to single-vane pumps. When an injection molding machine switches from clamping to injection, the dual vanes ensure a smooth transition in oil flow, avoiding pressure spikes that could damage molds. This design also reduces noise by 15dB compared to traditional pumps, creating a quieter working environment for factory operators.​

Another key advantage of the cat pv2r is its energy efficiency. The PV2R series uses low-friction vane materials and precision bearing assemblies, reducing mechanical loss to less than 5%. In a 200-ton press machine, this translates to a 10% reduction in hourly power consumption while maintaining stable pressing force. The Double Vane Pump structure also allows for modular flow adjustment: by matching different vane lengths, it can adapt to machinery with varying oil demand, eliminating the need for multiple pump models.​

 

Dual Vane Synchronization: The Double Vane Pump in the cat pv2r pump uses a coaxial drive structure, ensuring both vane sets rotate at the same speed. This synchronization prevents oil pressure pulsation, protecting valves and cylinders in the hydraulic system from fatigue damage.​

High Contamination Resistance: The PV2R series is equipped with a built-in high-precision filter screen (10μm filtration accuracy) and wear-resistant vane coatings. It can operate stably even in hydraulic oil with slight impurities, extending maintenance intervals to 8,000 hours-twice that of ordinary vane pumps.​

Broad Compatibility: The cat pv2r supports a wide range of hydraulic oil viscosities (32-100 cSt), adapting to temperature variations in factories (from 5°C to 40°C). This flexibility makes it suitable for both cold storage conveyor systems and high-temperature die-casting machines.​

Easy Installation: The PV2R series features standardized flange and oil port sizes, allowing direct replacement of old pumps in existing industrial machinery. The cat pv2r pump also includes mounting positioning pins, reducing installation alignment time by 50%.

 

Straight key shaft
Series	Shaft code	A	B	C	中D	E	Key width*length
20VQ, SQP1	1	59	9.53	12.1	22.23/22.20	24.5/24.4	4.76*32
25VQ,2520VQ SQP2,SQP21	1	59	9.53	11.1	22.23/22.20	24.5/24.4	4.76*32
	86	78	9.53	11.1	25.37/25.35	28.3/28.1	6.36*50.8
35VQ,35※VQ SQP3,SQP3※	1	73.2	9.53	11.1	31.75/31.70	35.36/35.10	7.94*38.1
	86	86	9.53	11.1	34.90/34.87	38.6/38.3	7.94*54
45VQ,45※VQ SQP4,SQP4※	1	62	12.7	14.22	31.75/31.70	35.36/35.10	7.94*28.5
	86	87.4	12.7	14.22	38.07/38.05	42.4/42.1	9.54*50.8

Spline shaft
Model	Shaft code	A	B	C	D	E	Spline data (See table below)
20VQ	151	41.1	9.53	11.1	3.9	27.8	A
25VQ,2520VQ	11	44.5	9.53	11.1	3.9	27.8	A
35VQ,35※VQ	11	58.7	9.53	11.1	6.35	35.1	C
45VQ,45※VQ	11	61.9	12.7	14.3	9.7	39.6	C

 

Spline data table (involute spline)
Spline data reference	Number of teeth	Pitch	Major diameter	Form diameter	Minor diameter	Flat root fit
A	13	16/32	22.17/22.15	19.03	18.63/18.35	Major diameter fit
C	14	12.24	31.70/31.67	27.2	26.99/26.64

 

Model	Max pressure(MPa) Speed (timin)						Input power (kW)
	Displacement (mLIr)	Special oil	Antiwear ol	Common ol	Min	Max
PV2R1-4	4.3	21	17.5	16	750	1800	2.1
PV2R1-6	6.5						3.2
PV2R1-8	8.5						4.5
PV2R1-10	10.8						5.4
PV2R1-12	12.8						6.1
PV2R1-14	14.5						6.9
PV2R1-17	16.2						7.9
PV2R1-19	20.1						9.6
PV2R1-23	22.5						10.5
PV2R1-25	25.3						12.5
PV2R1-28	29.6						14
PV2R1-31	32.3	16	16				15.5
PV2R2-26	25.3	21	17.5	54	600	1800	11.7
PV2R2-33	32.3						15.5
PV2R2-41	39.8						18.9
PV2R2-47	49.8						23.2
PV2R2-53	51.5						24
PV2R2-59	55.8						24.9
PV2R2-65	63.7						29.4
PV2R2-70	70.3	16				1200	31.6
PV2R2-79	78.1						35.7
PV2R2-85	82.7						37.5
PV2R3-52	51.5	21	17.5	14	600	1800	23.2
PV2R3-60	63.7						29.4
PV2R3-66	66.6						34.2
PV2R3-76	75.5						37.7
PV2R3-94	89.5						41.2
PV2R3-116	118	16	16				50
PV2R3-125	122.2					1200	59.9
PV2R3-136	136						66.7
Note: 1. When pressure of pumps exceeds 16MiPa, with displacement of"4* "g* "8".speeds should be more than 1450r/min. 2. Reduce the negative pressure of the iniet when the single pumps or double pumps with large displacement at high speed. 3. In use of synthetic hydrauic fiuids and water containing hydrauic fiuids, äimit the max speed at 1200rimin. 4. Spood at 1000rimin is suggested on cccasions with iower noise strietly required. 5. Nolsinets is available in working conditions of 14MPa and 1200rimin. 6. Input power is availlabie in working conditions of 16MPa and 1500rimin.

 

To protect your rights please read the following carefully Pump Start-up Procedure Preparation Prior to Start-up The reservoir and circuit should be clean and free of dirt and debris prior to filling with fluid. Circuit Cleanup The reservoir should be charged with filtered hydraulic fluid. The fluid level should be sufficient to prevent vortexing at the suction connection to the pump inlet. It is good practice to clean the system by flushing and filtering, using an external slave pump. Filling Pump and Removing Air If the pump is mounted above the fluid level, it should be filled with fluid through the outlet port. If the pump is mounted below the fluid level, the pump outlet fitting (or other downstream fitting or plug) can be loosened to allow fluid to displace the air. It may be necessary to loosen the fill cap on the reservoir to allow the fluid to flow freely. When a solid stream of fluid with no observed air begins to drain through the loosened fitting, the fitting should be retightened. An air bleed valve in the outlet circuit is also recommended to remove trapped air. If such a device is used, the pump should be filled with fluid before start-up. In some cases, it may be possible to prime the pump by running the engine starter for five to ten seconds with the throttle and/or ignition switch in the "off" position. It will be necessary to loosen a fitting or plug in the pump outlet to allow air to escape. Pump Start-up All controls should be placed in the neutral position so the pump is unloaded when started. Start the engine and run at low idle. Once the pump is started, it should prime and pump within a few seconds. If it does not, make sure there are no restrictions between the reservoir and the inlet to the pump, and that there are no air leaks in the inlet line and connections. Also, make sure that trapped air can escape from the outlet. Run at low engine idle for approximately five minutes. Then, while observing the reservoir fluid level, operate the implements. Extend all actuators to maximum safe limits to completely fill the system with fluid. Do not run with the fluid level below the "low" limit. Add fluid to the reservoir to bring the fluid to the proper fill level.

 

 

 

 

 

 

 

 

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