Dynex / Rivett Inc

Hydraulic Components and Power Units

Dynex manufactures hydraulic components and systems for use on mobile and industrial machinery. These pumps, valves, motors and power units have been sold worldwide for over 40 years.

Products include high-pressure piston pumps, high-pressure directional and pressure control valves, heavy-duty piston motors for demanding conditions, low-speed high-torque (LSHT) vane motors, and electrohydraulic actuators for remote control.

Dynex also builds standard hydraulic power units or specialized systems for demanding conditions including high pressure and special fluids.

Dynex Product Index  

 

	HIGH PRESSURE PUMPS   Piston pumps rated 6000 to 20 000 psi (420 to 1380 bar)
	PUMPS FOR USE WITH SPECIAL FLUIDS Pumps for water glycol, diesel calibration, Skydrol and others
	SPLIT-FLOW® PUMPS  Synchronized movement with multiple outputs from one pump
	DIRECTIONAL CONTROL VALVES  High pressure valves rated to 10 000 psi (700  bar)
	PRESSURE CONTROL VALVES Manual or proportional pressure regulation to 15 000 psi (1040 bar)
	HYDRAULIC POWER UNITS AND SYSTEMS JIC and NFPA standard or specialized units to 700 hp (520 kW)
	REMOTE PROPORTIONAL ACTUATORS Output rod movement proportional to an electrical input signal
	VALVEPLATE PUMPS AND MOTORS Electrohydraulic pumps for accurate, remote speed control
	LSHT VANE MOTORS REPLACE VICKERS MHT MOTORS Low speed, high torque motors for smooth, quiet operation
	PISTON MOTORS Withstand pressure spikes and tough duty to 8000 psi (560 bar)

Product Benefits and Markets
Dynex hydraulic components and power units operate under demanding conditions including high pressure, contamination, dirty environments, special fluids, extreme temperature variations and long duty cycles.
A wide range of products are used in many different industries including:

• Offshore Wellhead Safety Control Systems
• Subsea Production Control Systems
• Wellhead Panel Systems
• Blowout Preventer (BOP) Systems
• High Torque Tools
• Tunneling and Pipe Jacking
• Mining Equipment
• R&D and Production Test-Stands
• Machining/Manufacturing Systems
• Aerospace Ground Support Equipment
• Heavy Lifting and Skidding
• Road Construction Equipment
• Military Equipment
• Metal Processing
• Hydrostatic Roll Balance and Lube Systems
• Injection Molding Machines
• Hydraulic Presses
• Rock Crushing Equipment

• Dynex manufactures hydraulic components and systems for mobile and industrial machinery. High flow and high pressure products include piston pumps, control valves, piston motors and LSHT vane motors, hydraulic actuators, electrohydraulic controls, hydraulic power units and systems. Dynex products have been sold worldwide for over 40 years.

  Dynex Checkball Pump A fixed angle wobble plate, which rotates with the shaft, causes the pistons to reciprocate in their bores. The individual piston check valves direct flow from the inlet side of the pump to the pump outlet. Pump Specifications - Fixed delivery:    Flows from 0.22 to 60 gpm (0,83 to 227 lt / min) at 1.800 n/min.   - Variable delivery:    Maximum flows from 12.7 to 60 gpm    (48,1 to 227 lt / min) at 1800 n/min.    Pressure compensated models to 8.500 psi (590 bar) Unique Pump Benefits Extended life at pressures from 6.000 to 20.000 psi (420 to 1400 bar) Exceptional contamination tolerance . Multiple flows from one pump without flow dividers . Operate with low viscosity special fluids. The direction of output flow is constant, regardless of drive shaft rotation. Electrohydraulic volume control .

  Dynex  Split-Flow Checkball Pumps The unique checkball pump design, with isolated pumping chambers, allows the output of each piston to be used separately. In split-flow cover models, individual outputs are grouped together in the pump cover or barrel, providing smooth multiple flows to meet system requirements. Isolator valves can be used to isolate the output of one or more individual pistons from the main pump outlet. Up to ten independent flows are possible from a ten-piston pump

  Dynex  Split-Flow Circuits In multiple function circuits, one pump can simultaneously supply independent fixed or variable flows to multiple functions in a circuit with separate loads. A single pump can provide synchronized movement of cylinders without using flow dividers. These pumps provide unique advantages for lifting, jacking and skidding operations, increasing the accuracy and flexibility of systems for handling heavy loads. In Hi-Lo circuits one pump can efficiently supply fluid in a circuit with changing flow and pressure requirements. This makes the pumps ideal for clamping, pressing and high-torque tool applications. Split-Flow pumps can simplify a multiple function circuit, reducing piping and installation time.

  Dynex  Directional Control Valves Dynex HP03 Valves HP03 Valves Sliding spool valves rated for 15 gpm at 10.000 psi (57 lt / min.  at 700 bar) Compact valves eliminate complex valve circuits for four-way control in high pressure systems. Full range of actuator, spool and other options. Standard NFPA/ISO Pattern Valves 5.000 psi (350 bar) valves with models rated to 165 gpm ( 625 lt / min.). VST Series Valves Non-silting ball-on-seat design for reliable shifting. Two position, two-way valves, rated for 1 gpm at 15.000 psi ( 3,8 lt / min. at 1040 bar) for low flow venting functions. Two position, three-way valves, rated for 5 gpm at 10.000 psi (19 lt / min. at 700 bar) for load holding functions. Dynex

  Pressure Control Valves Dynex H8819 Series Proportional relief valves rated for 50 gpm at 15.000 psi (190 lt / min. at 1040 bar) or 75 gpm at 9000 psi (284 L/min at 620 bar). VH Series Relief valves with models rated to 20 gpm at 15.000 psi (76 lt / min at 1.040 bar). Pressure controls with models rated to 150 gpm at 5000 psi (568 lt / min. at 350 bar), with relief, reducing, unloading, counterbalance and sequence functions available .

  Valveplate Pumps and Motors Dynex Electrohydraulic pumps for accurate variable speed control of actuators Pump output flow proportional to a variable electrical input signal Pressures to 4.000 psi (280 bar), flows to 24.5 gpm (92,7 lt / min.) at 1.800 n/min. Compact motors produce torque to 1.386 lb-in at 3.000 psi (157 Nm at 210 bar).

  Low-Speed, High-Torque Motors Dynex Vane motors with direct drive and hollow shaft capability . Ideal for vertical installations on earth augers or rock drills . Torque to 13.750 lb-ft at 2.750 psi (18.645 Nm at 190 bar). Replaces Vickers MHT motors.

  Piston Motors Dynex Pressures to 8000 psi (560 bar). Ideal for applications subject to pressure spikes, vibration, constant starting/stopping, and sudden direction reversals. Compact motors produce torque to 4.775 lb-in at 5.000 psi (540 Nm at 350 bar).

  Remote Proportional Actuators Dynex One inch output rod movement proportional to an electrical input signal. Used to stroke variable pumps and motors, spools of large valves, throttle controls, clutches or brakes. Simple control with output force from 60 to 1.200 lb (0,27 to 5,33 kN).

  Power Units and Systems Dynex JIC and N.F.P.A. standard or custom built units to 700 hp (523 kW). Incorporate customer or distributor supplied components. Stainless steel construction. Socket welding for high pressure systems. Pressures up to 15.000 psi (1.040 bar). Reservoirs up to 440 U.S. gallons (1.665 lt.)

 

Dynex / Rivett Inc

 

 

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