Page 12 troubleshooting proportional valves bosch valves. Guidelines for applying proportional directional control valves as well as a glossary of industry terms can be found on the back of this brochure. Direct operation of the control spool 2 by controlling a pro. Test unit for proportional and servo valves with integrated control electronics type vtvet1, series 1x to catalogue sheet re 29 685. These valves are ideal for many closed loop applications. Proportional directional valve, direct operated, with. It is designed for working pressures of up to 3 0 bar and a maximum pump flow of 00 lmin. The 4 wra e b 6 must be coded g24, although it has a 12 volt coil. It is suitable for testing valves with an operating voltage of. Discover the proportional hydraulic directional control valve product range of bosch rexroth.
Buy 0811404640 bosch rexroth hydraulic proportional directional control valve 4wrpeh6cb40l2xg24k0f1m online today with confidence thanks to our. Proportional solenoid operation the bosch rexroth 4wr 5x series proportional directional valves are pilot operated 4way valves operated by means of proportional solenoids. Proportional directional valves, re 2907508 bosch rexroth. Rexroth directional control valves supplied by delta p hydraulics. These directional valves basically consist of housing 1, one or two solenoids 2, control spool 3, as well as one or two return springs 4. Kbfdtg4v5, 12 series proportional directional valves.
The 2 switched position valves are however, only fitted with solenoid a 5. China hydraulic valves proportional, hydraulic valves. Proportional directional valve for control systems syhdfe. When a circuit does not require extreme accuracy or flow repeatability, the savings in first cost, plus a lessexpensive filtration requirement, make proportional valves a good choice. Unmatched capability in directional control valves. If the actuator is a hydraulic motor or a double rodend cylinder, volume at the inlet and outlet is the same. Operation is effected by proportional solenoids with central thread and detachable coil. Operation is effected by means of proportional solenoids for explosive areas. Proportional directional control valves are more tolerant of contamination and cost less than the servo valves that they often replace. Wrh are pilot operated proportional directional valves for the external operation by. When using direct operated directional valves it has to be taken into account that the rring counterbores. Proportional directional valves control runningaway loads because most spool designs control flow to and from the actuator. Proportional directional valve, pilot operated with electrical position.
Directly controlled proportional valve for the control of direction and magnitude of a flow. Bosch rexroth proportional hydraulic directional control valves all. Pneumatic directional control valves industrial type. The 42 and 43 proportional directional valves are direct operated components of subplate. Directional control valves l90ls catalogue hy178504uk the l90ls is a stackable, multisection, loadsensing, pressurecompensated directional valve for mobile machines such as cranes, skylifts, forklift trucks, platform trucks, excavators and harvesters. They control the direction and flow rate of hydraulic fluid. Sliding spool, poppet type, screwin cartridge valves.
Data is typical with fluid at 36 cst 168 sus and 50 c 122 f. Ets has over 25 years of sales and service experience with the bosch rexroth group in the u. While the design of proportional directional valves may vary from one manufacturer to another, they all essentially perform the same function. Directly operated proportional directional valve for the control. Rexroth hydraulic valveexcavator hydraulic control valvesolenoid valve coil proportional valve directional valvepressure controlseal kit for 4we6 4we10 fob price. Directional control valve l90ls fluid power solutions. The 42 and 43 proportional directional valves are designed as direct operated devices in plate design. Hydraulic solenoid directional control valves that consist of direct operated and pilot operated directional solenoid valves that feature maximum flows of up to 1 100 litres per minute. A plug 11 is fitted in place on the 2nd proportional solenoid. Rexroth proportional valve 4wrke heash technique b. It is suitable for testing valves with an operating voltage of 15 v or 24 v. Proportional directional valves, direct operated with. Actuation by means of a proportional solenoid with electrical.
Actuation by proportional solenoids with a central tube and. The proportional solenoids are pressuretight, wetpin dc solenoids with detachable coils. Proportional valves the 42 and 43 proportional valves are directly controlled components of subplate mounting design. The wraeb6 may also be used with a dc switching signal, if the application requires throttled shifting without full proportional control. Individual valve amplifiers are available for the nonobe version. Proportional hydraulic directional control valve all. Bosch rexroth proportional and servo valves hydraulics. Pilot 3rd and 4th digits are always zero 0 0 0 0 0.
Valve element with direct proportional flow sharing control. They control the start, stop and direction of a flow. The 42 and 43 proportional directional valves are direct operated components of subplate mounting design. The solenoids are controlled by external electronics. Delivery times may vary, especially during peak periods. Our knowledge and expertise is invaluable in assisting your company with old and new series bosch rexroth servo and proportional valve repairs, as well as any of the standard directional, flow and pressure control valve repair and replacement needs. Directional control valves proportional bosch rexroth sa.
With versions xy and xl the connection between p2 and x is plugged. The main stage is positioncontrolled so that the control spool position is independent from flow forces also. Proportional valve series electrohydraulic proportional valve features. Proportional directional valves, directoperated, with. Standard performance valves respond to low frequency input. Proportional directional valves are available as direct operated and pilot operated valves with or without integrated electronics obe. Pilot 2 double solenoid 4 iso 4 4 3 position valves, closed ctr. Troubleshooting proportional valves page bosch valves.
Rexrothproportionalvalve drilling solutions limited. Directional spool valves, direct operated, with solenoid. Rexroth directional control valves supplied by delta p. Directly operated servo solenoid directional control valve, with control piston and sleeve in servo quality. Contact me about proportional valves from the bosch rexroth south africa group of companies directional control valves specifications 42 and 43 way proportional directional valves types 4wre and 4wree. For the metal box style, use a screwdriver to remove the metal cover. Typical control system of a proportional valve adapted from ref. Flow control and priority valves way, 3way version up to 00. When using pilot operated proportional directional control valves in conjunction with the zdree 10, the proportional valve has to be the version with external pilot supply.
Jun 16, 2019 bosch rexroth proportional directional valves, direct operated obe 4wrae spools with control spool symbol e1 and w1 the following applies. Operation is effected by proportional solenoids with central. Directional valves of type we are solenoid operated directional spool valves. Direct operated directional valves do not require pilot oil pilot oil drain from directional valve plugged, for zdre 10 external direct actuated directional valves do not require pilot oil note. Proportional directional control valves are exclusively available from the hytec group of companies, africas largest supplier of hydraulics and automation products. System set up prior to testing the valve, configure the system and amplifier as follows. Contact me about proportional valves from the bosch rexroth south africa group of companies. As the proportional valve shifts to move the actuator, restricted flow from the opposite side controls. Proportional directional control valves standard performance valves high performance valves servo performance valves for use in openloop applications requiring reproducibility of rapidslow speed profiling, and smooth acceleration and deceleration performance. Proportional solenoid operated directional spool valve. All rights integrated valve electronics for type 4wrae. Onoff valves 36 directional valves 47 directional spool valves proportional, highresponse and servovalves 66, 86 proportional directional valves 72 proportional pressure control valves 80.
For the coil mount version, use a small screwdriver to loosen the mounting screw and remove the transparent cover. In the example, the zero adjustment has adjusted the input signal to the amplifier to. Hydraulic valves, directional, relief, flow, check valves. Proportional valve spools nominal flows pressure drops power limits performance terms 4. In the deenergized condition, the control spool 2 is held in a mechanical. Pilot operated, 2stage proportional directional valves with.
Bosch rexroth ag table of contentsindustrial hydraulics 3 page pum ps 7 directional valves. There are 7 bosch rexroth variations to choose from, 2 in the pilot operated range and 5 in the direct operated range. The h2fx valve is a lever operated, pressure regulation, 4way directional valve made of anodized diecast aluminum. The control edge geometry has been optimized for the use as pilot control valve for proportional directional valves type 4wrke. Direct operated proportional directional valve with electri. Proportional valves can be used as flow and pressure controls, but the most common use is as a directional valve. Bosch rexroth proportional hydraulic directional control. Omit for models without integral amplifier 3 feedback arrangement f spool position 4 control type d directional valve t. Plugin connectors to din 43563am6, see catalog sheet re 08008 order separately. Find your proportional hydraulic directional control valve easily amongst the 63 products from the leading brands parker, argohytos, bosch rexroth.
Series list and outstanding flow rate reproduction. Bosch rexroth proportional hydraulic directional control valves. Main valve 10 with main spool 11 and centering spring 12 interconnecting plate 16. We directional spool valve bosch rexroth ag, re 23352, edition. Wrh valves are pilot operated proportional directional valves for external operation via pressure control valves.
They reduce the required wiring and simplify handling, with their integrated electronics obe, whilst providing exact reproducibility and a low manufacturing tolerance at the same time. Power supply 24v dc 18 v to 36v including 10% peaktopeak max. It consists of two 3way directional valves and a 3way pressure regulating portion. Pilot 1 single solenoid s 3 iso 3 3 3 position valves, exhaust open ctr. Bosch rexroth proportional, high response servo valves are used as directional valves, pressure valves and flow control valves. Directional control valve 5 ports 3 positions normally a pneumatic valve directional control valve with 5 ports and 3 finite postions proportional directional control valve electrohydraulic servo valvethe spool positions on these valves is variable allowing for variable flow. The wrae direct operated proportional valve with integral feedback is available with or without onboard electronics obe. Valve amplifier for proportional directional valves. Hydraulic directional control valves bosch rexroth. They reduce the required wiring and simplify handling, with their integrated electronics obe, whilst providing exact reproducibility and a. It can achieve the simultaneous activation of different actuators by distributing.
Directional control hydraulic valves are the most universally applied products for controlling the start, stop, and direction of fluid flow in a circuit. The test unit is used for the control and for functional testing of proportional and servo valves with integrated electronics. Using integrated electronics, they reduce the cabling effort and simplify handling. The regulating portion furnishes inlet air to the directional valves. Rexroth hydraulic valve r electrically controlled proportional pressure control.
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