Hartmann PVX 116 Variable Displacement Axial Piston Pump

Overview

The Hartmann PVX 116 is a variable displacement, axial piston, swash plate hydraulic pump from Hartmann Controls of Hartland, Wisconsin. It is the Frame 1 model of the PVX family with a displacement of 1.0 in³/rev (16 cm³/rev), a rated pressure of 5,000 psi (345 bar) and a peak pressure of 6,000 psi (417 bar). Hartmann designed the PVX range for both industrial and mobile hydraulics, with continuous operating pressures from 200 to 5,000 psi and shaft speeds up to 3,200 rpm at atmospheric inlet conditions, aiming at long and dependable service.

Seven Star LLC supplies the Hartmann PVX 116 and other Hartmann pumps to hydraulic power unit builders, offshore and onshore oil and gas service companies, marine operators and industrial maintenance teams in Oman and the GCC. From Muscat we provide engineering support for model code selection, control options and replacement of existing pumps.

Operating Principle

In an axial piston swash plate pump such as the Hartmann PVX 116, a rotating cylinder block carries a ring of pistons whose shoes slide on an inclined swash plate. In general, as the block turns, each piston is drawn out on the suction side and pushed in on the delivery side, and the stroke length depends on the swash plate angle. Changing that angle changes the displacement per revolution, so flow can be adjusted continuously from zero to maximum without changing shaft speed.

The swash plate angle is set by the selected control. Hartmann offers top controls such as a pressure compensator, a remote pressure compensator, a low-pressure compensator, adjustable and fixed flow-load sensing with pressure compensation, a torque limiter and an electronic control, plus stack controls including flow-load sensors, a soft-start on/off control and a torque limiter. A pressure compensated pump delivers only the flow the circuit needs at the set pressure, which in general reduces heat generation and power consumption compared with fixed displacement pumps.

Engineering Design of the Hartmann PVX 116

The Hartmann PVX 116 has a compact, rugged ductile iron frame and is offered with SAE B 2-bolt or 4-bolt mounts or an SAE C 4-bolt mount. Drive shaft choices include SAE B, SAE BB and SAE C in spline or keyed versions, and through-drive builds can carry a rear SAE A or SAE B pad with matching coupling for tandem pumps. Ports are rear or side, for clockwise or counter-clockwise rotation, with code 61 and code 62 four-bolt flanges or SAE straight thread options. The pump is fitted with a Viton shaft seal and O-rings and has maximum and minimum volume stops, the minimum stop being adjustable.

Theoretical flow at 1,800 rpm is 7.8 gal/min (29.5 l/min), shaft speed ranges from 600 to 3,200 rpm, and output torque at rated pressure is 797 in-lb (90.0 N-m). Recommended input torque limits are 1,450 in-lb (163 N-m) for an SAE B shaft, 2,200 in-lb (248 N-m) for SAE BB and 3,700 in-lb (417 N-m) for SAE C, and input torque may not exceed the total of the front pump and any rear-mounted units. Typical weight is 68 lb for side-ported and 62 lb for rear-ported pumps. Hartmann describes the design as service friendly, and repair manuals and service kits are published for the PVX range.

As general hydraulic practice, a variable piston pump should be installed with a short, generously sized suction line, its case filled with clean fluid before first start, and the case drain routed directly to the reservoir below the fluid level. A system relief valve set above the compensator setting protects the circuit. Following these basics, together with good filtration, is what allows the Hartmann PVX 116 to reach the long service life Hartmann designed it for.

Key Features

Reasons to select the Hartmann PVX 116:

• Variable displacement of 16 cm³/rev with adjustable minimum volume stop.
• Rated pressure of 345 bar and peak pressure of 417 bar.
• Shaft speeds from 600 up to 3,200 rpm at atmospheric inlet conditions.
• Theoretical flow of 29.5 l/min at 1,800 rpm.
• Compact ductile iron frame with SAE B or SAE C mounting.
• Wide choice of drive shafts, porting and through-drive configurations.
• Many control options including pressure compensator, load sensing, torque limiter, soft start and electronic control.
• Viton shaft seal and O-rings as standard, with a water-base fluid option on SAE B builds.

Industrial Applications

Hartmann pumps are used across construction equipment, energy units, marine systems, metals processing, material handling and heavy machinery. In Oman and the GCC the Hartmann PVX 116 fits hydraulic power units for wellhead control panels, workover and snubbing units, winches and cranes on supply vessels in Muscat, Sohar and Duqm ports, presses and injection moulding machines in industrial estates, and test benches in hydraulic workshops. Its 345 bar rating and compact size suit mobile machines where space is tight but high pressure is needed.

Seven Star LLC supplies the Hartmann PVX 116 and can match existing installations by model code, mount, shaft and control. Other piston pumps on this site include the HARTMAN PV320R-AV1-A1D/32002-40 high-pressure axial piston hydraulic pump and the Bosch Rexroth A10VSO axial piston variable pump, and for fixed displacement gear pumps see the KRACHT KP Series internal gear pump.

Technical Specifications

The following Hartmann PVX 116 data comes from the Hartmann Controls Frame 1 PVX 116 specification sheet:

How to Order

To quote the Hartmann PVX 116, send Seven Star LLC the full model code or the required mount, shaft, rotation, porting and control, together with the operating pressure and drive speed. The Hartmann PVX 116 specification sheet can be downloaded from this page. Our Muscat team will confirm availability and support replacement and commissioning across Oman and the GCC.