Sectional Directional Control Valve RSQ 240

Transcription

1 Sectional Directional Control Valve RSQ 0 Key valve features RSQ 0 is a sectional open center valve, designed for max. operating pressures up to 50 bar and max. pump flows up to 00 l/min. It is available with to 0 working sections per valve assembly. RSQ 0 is designed with an open center for fixed and variable displacement pumps. The valve is characterized by the unique dual flow range possibility and its ability to facilitate simultaneous operation of several functions. RSQ 0 is available with electrohydraulic or hydraulic proportional remote control, but the valve can also be manually operated. The electro-hydraulic proportional version in particular offers compact design with internal pilot oil supply, solenoids integrated in the valve body and integral hand levers for manual override / manual operation. The valve offers excellent operating characteristics because of the specially designed spools for different applications. Low and uniform spool forces are the result of careful balancing of the flow forces. Q-function The flow control (Q-function) of the inlet section bypasses the major part of the pump flow to tank when the system is idling, still giving access to full pump flow when the services are operated. Besides greatly reducing heat generation this also provides improved operating characteristics. Q-function, in combination with the RSQ 0 unique dual parallel gallery functional principle, and separate flow regulation in each working section, gives this valve a very high performance level. Applications The RSQ 0 is ideal for applications such as truck cranes, backhoe-loaders, excavators, drilling rigs, telescopic load handlers, skylifts, refuse vehicles and fork lift trucks. Technical data Pressure and flow values* Max. operating pressure per port: P, P, A, B: 50 bar PPM: 5 bar Without HPCO-Function T: 0 bar With HPCO-Function T: 00 bar With internal connection of T to T T, T, T: 5 bar With external pilot drain line T, T: T: Max. permissible flow on port P: Further data Spool control force of spool control 90: Neutral position: Max. spool stroke: 0 bar depressurized to tank 00 l/min 0 N 0 N Permissible contamination level: Equal or better than 0/8/ as per ISO 06 Viscosity range: 0 00 mm /s (cst) Higher viscosity allowed at start up Leakage A, B T at 00 bar, cst and 0 C: cc/min Pressure fluid: Mineral oil and synthetic oil based on mineral oil HL, HLP according to din 55 Fluid temperature range: -5 C up to +80 C * Higher values are possible, depending on application. For applications with demands that exceed stated data above, please contact us for consideration. MTTFd value after consultation with HYDAC. Remote control The RSQ 0 is designed with an integrated pilot supply system in order to achieve an easy installation and a reliable remote control function. It is also possible (and in some cases to prefer) to supply the pilot system externally. Further RSQ 0 properties and possibilities z Complete flow regulation control. At reduced flow the entire spool (lever) resolution is maintained z Raised working pressure level in low flow mode allowing increased payloads, for example in cranes z Separate adjustable flow limitation in each section, independent of pump flow z A wide choice of spools and spool controls for different flow combinations and for several applications and systems z A full range of service port valves. z Load check valves in each working section z Spool actuators for external kick-out and spool position sensing z L. h. and r. h. inlet configurations are available z Intermediate outlet section for dual circuit systems z Configurable for systems with variable displacement pump z Manual versions easily convertible to remote control z Pressure relief valve for downstream services z Electrical unloading z Regenerative function z Possibility of high pressure carry-over

2 General overview El. unloading valve Solenoid valve for EHP Two speed control valve Section High pressure carry-over Tie rod Section Main relief valve Weight Inlet section Weight in kg ID 8. IA 6. IB 6. Working section Weight in kg SB 5.6 SC 5.5 Outlet section Weight in kg UA 6.0 UB 5.9 UC 5.8 Dimensions, spool controls Type LA [mm] LB [mm] HP0 HP0 70 L6 87 L6 9 HL6 87 HL6 96 SM/SR 7 M0 8 HP0 70 MH0 57 MH0 57

3 Pressure drop Oil temperature / viscosity for all graphs: +0 C / cst 0 working sections working section 0 working sections working section Pressure drop P - T el. unloaded, with PF505, FK50 Pressure drop P - T (idling), with PF505, FK50 0 working sections working section 0 working sections working section Pressure drop P - T el. unloaded, with PF507, FK50 Pressure drop P - T (idling), with PF507, FK50 0 working sections working section 0 working sections working section Pressure drop P - T el. unloaded, with PF5, FK505 Pressure drop P - T (idling), with PF5, FK505 0 working sections working section 0 working sections working section Pressure drop P-A/B Pressure drop A/B - T

4 Dimensions ID UB (07) No. of sections L [mm] LK [mm] (96.5) LK L PS G¼" P G¾" A-side G½" T G⅜" TD M6 PPM G⅜" T G" 75 M8 (x) PM G¼" T G¾". 7 9 T G½" B-side G½"

5 Dimensions IA 5 UA LK.5 L PM G¼" 5.5 LA 5 A G½" P G½" UC 5 PPM G⅜" 8 T G⅜" T G" T G½" 8-0-RS0-0 / LK [mm] 8.5 L [mm] Ø0 H B G½" LB No. of sections 0 T G½" P G¾" Ø0 H T G" T G" 5

6 Inlet section ID dual flow ranges 5 6 P T 8 9 The unique RSQ 0 high-low flow property is achieved by the integral switching spool 6 of ID, which can be electrically operated by the use of a solenoid valve. The ID with its integral Q-function provides bypass of pump flow to tank in idling condition thereby reducing pressure drop and heat generation, as well as accomplishing improved control characteristics. The bypass flow control spool in combination with an electrical unloading valve 9 achieves emergency dump of all pump oil to tank. ID houses a small relief valve cartridge TB which together with the bypass flow control spool provides the primary relief valve function of the RSQ 0. A choice of different metering orifice cartridges 7 are available, determining low flow range, influencing pressure build-up to suit different applications and constituting flow from the high pressure carry-over for downstream services. ID when equipped with a pressure reducing cartridge TRA5 5, provides pilot oil supply for hydraulic and electro-hydraulic proportional remote controlled working sections. ID is equipped with a special check valve, FSB 8, to cushion the opening of the bypass control spool thereby eliminating unnecessary pressure peaks. Inlet type D ID Main relief valve TB Bypass flow control spool unit FK0 Solenoid valve for el. high-low flow control E96 5 Pressure reducing valve TRA5 6 High-low flow control spool unit FV0 7 Metering orifice cartridge for low flow PF505 8 Cushioning check valve FSB 9 Electrical unloading valve E96 6

7 Inlet section IA single flow range and manually operated sections T P P PM The IA provides full RSQ 0 Q-function. When equipped with an electrical unloading valve (E96), emergency dump is achieved. Here we have a plug. The integral TB in combination with flow control spool FK../TK.. form the primary relief valve function. A number of bypass flow control spools, with its integral metering orifice, are available to suit different system requirements in terms of desired flow from the high pressure carry-over. Inlet type A IA Main relief valve TB Bypass flow control spool unit TK57 Plug PE0 Inlet section IB single flow range and remote controlled sections T P P 6 5 PM 5 6 The properties of the IB are the same as for IA, with the addition that it can be equipped with a pressure reducing cartridge TRA5 providing pilot oil supply for remote control. IB is equipped with a special check valve, FSB5 5, to cushion the opening of the by pass control spool thereby eliminating unnecessary pressure peaks. Inlet type B IB Main relief valve TB Bypass flow control spool unit FK5 Pressure reducing valve TRA5 5 Cushioning check valve FSB5 6 Plug PE0 7

8 Working section SB manually operated A B Working Section SB Spool actuator bracket M0 Spool Low flow check valve ML 5 Full flow metering check valve MF 6 Spool position indicator SM 7 Port relief / anticavitation valve TBSD60 8 Port relief / anticavitation valve TBSD60 Working section SC remote controlled A B With cavities for service port valves and for solenoid operated valves for EHP. Working section SC Solenoid valve EHP, V / V ER6 / ER6 Spool actuator MH0 Spool 5 Spool control HP0 6 Low flow check valve ML 7 Full flow metering check valve MF 8 Port relief valve TBD60 9 Port relief valve TBD60 8

9 Outlet section UA for manually operated sections T T With cavity for high pressure carry-over plug. Note that the carry-over flow is the flow that is regulated into the center channel i. e. the flow determined by the metering orifice of the inlet section. Outlet section type A UA Plug P00 Outlet section UB for remote controlled sections T T PPM T With cavity for high pressure carry-over plug. Here you have the pilot pressure valve TMB0. With port (PPM) for external pilot oil supply / pilot pressure gauge. With port (T) for external pilot oil drain (provided plug PMS6 fitted in TD). The return flow from the spool controls and the pressure reducing valve should be drained directly to tank in a separate piping. With cross drillings for pilot oil supply to B-side of SC sections. Outlet section type B UB Pilot pressure valve TMB0 Plug PMS6 9

10 Outlet section UC intermediate outlet T T PPM T Intermediate outlet allowing dual circuit system. Intended both for manually and remote controlled valves. With cavity for high pressure carry-over plug. Here we have the pilot pressure valve TMB0. With port (PPM) for external pilot oil supply / pilot pressure gauge. With port (T) for external pilot oil drain (provided plug PMS6 fitted in TD). The return flow from the spool controls and the pressure reducing valve should be drained directly to tank in a separate piping. With cross drillings for pilot oil supply to B-side of SC sections. Outlet section type C UC Pilot pressure valve TMB0 Plug PMS6 0

11 Electrical unloading valve and two speed control The electrical unloading valve is a -way, normally open, solenoid type cartridge valve. It is an option in inlet sections ID and I. It is intended for emergency stop and for pressure drop / heat generation reduction. The unloading valve has manual override. E9 and E96 has push and twist type pin operation. This pin is sealable. PE0 is the plug for the cavity. Data Rated flow: 0 l/min Power consumption: 8 W ( V) 9 W ( V) Rated voltage E9: V Rated voltage E96: V Max. voltage variation: +/- 5 % Duty factor*: 00 % Connection**: Connector according to EN (form A) Protection class: IP65 * Sufficient cooling must be provided. ** Other options available on request. Codes E9 E96 Push and twist type override V Push and twist type override V ID E9 / E96 for two speed function, high-low flow E9 / E96 for el. unloading / emergency stop I E9 / E96 for el. unloading / emergency stop

12 Spool controls A-side Spool actuators B-side Spring cap 90 Spool actuator M0 Spool actuator MH0 Spring centered Spool actuator Cap for manuel override Spring cap 00 Detents at positions, and Spring cap 0 For valves in standard configuration spool controls are mounted on the A-side of the valve and the spool actuator on the B-side. Hand lever ME80 Spring centering with detent at position Spool control HP Hydr. proportional. For external pilot oil supply. Pilot pressure 6 6 bar, max pilot pressure 5 bar* Spring cap L6 External hydraulic kick-out from inserted spool* Spring cap L6 External hydraulic kick-out from inserted and extended spool, locking neutral position* Spring cap SM** / SR** Spool position indicator. Power supply 0 0 V. The hand lever ME80 is designed to be used in combination with spool actuator MH0, but it is a separate item and must be ordered separately. ME80 provides manual override for EHP controlled RSQ 0 valves. 80 * Connection G¼" BSP ** Available in connector Mx and DT-0 Solenoid valve for EHP ER6 / 6 Note: If used as on-off it is recommended to limit the current by using for example a coupling resistance. Please contact HYDAC for detailed information. ER6/6 ER6/6 are /-way electrically operated pressure reducing valves used to provide controlled pilot pressure to operate valve spools. Functional principle PWM (Pulse Width Modulation) Duty factor 00 % Connection AMP Junior-Power-Timer Recommended PWM frequency 00 Hz Protection class IP 65 Ambient temperature range -0 C +50 C Fluid temperature range -5 C +80 C ER6 Rated voltage Starting current Fully shifted Coil resistance +0 V DC 500 ma,00 ma 5. Ohm ER6 Rated voltage Starting current Fully shifted Coil resistance +0 V DC 50 ma 600 ma.7 Ohm Important: The capacity of the current source must be higher then the current demand of all parallely active solenoids in order to provide the PWM effect. The HG plug is used when the valve is hydraulically remote controlled by a hydraulic servo valve.

13 Spools The RSQ 0 spools are available in a variety of flows and styles to accommodate most design requirements. Since the development of spools is a continuous process and all available spools are not described in this data sheet, contact HYDAC for advice on choosing spools in order to optimize your valve configuration. Open center flow (l/min) Reduced flow range code PF5 FK505 Reduced flow range code PF507 PF50 PF505 FK50 Pump flow (l/min) First digit in shaded squares represents reduced flow range code. Second digit represents full flow range code. PF5.. are metering orifices of ID inlet. FK5.. are flow control spool (with integral metering orifice) of I.. inlets.) How to choose metering orifice: If pump flow is 80 l/min, and wanted reduced speed flow is approx 5 l/min, then metering orifices PF507/FK50 will achieve an open centre flow of l/min. Principle spool matrix Flow range (l/min) Function / Type Double acting spool / 6 9 Single acting spool / 6 9 Double acting spool with th pos. for float / 6 9 Motor spool / 6 9 Spools in reduced flow code (upper shaded area above) are also available. Spools specially developed for truck cranes (also for use in systems with load holding valves), as well as other application adapted spools are available on request. Recommended low flow range: 0-0 l/min.

14 Main relief valves Main relief valve TB The bypass flow control valve FK.. in combination with the relief valve cartridge TB form the pilot operated relief valve function of the inlet sections for the primary circuit. ID FK0/0 TB is adjustable and sealable. z Setting range: 5 50 bar ( MPa) z Setting range step: 5 bar TB I.. FK.. TB

15 Service port valves Port relief valve TBD60 The TBD60 is a differential area, direct acting relief valve, for the secondary circuit. TBD60 is adjustable and sealable. Setting ranges for TBD and TBSD60: z Setting range: 5 50 bar ( MPa) z Setting range step: 5 bar Port relief and anticavitation valve TBSD60 See TBD60 for functional principles. TBSD60 is adjustable and sealable. Relief and anticavitation characteristics Relief characteristics TBD / TBSD60 Anticavitation characteristics TBSD60 5

16 Service port valves Anticavitation valve SB500 The anticavitation valve service to ensures that, in the event of a lower pressure in the cylinder port than in the tank, oil can be drawn from the system oil tank to the consumer. 6

17 Miscellaneous Pressure reducing valve TRA5 The cartridge type pressure reducing valve TRA5 is used in inlet section ID and IB to provide pilot oil supply for remote control. TRA5 is fixed set at bar which consequently is the maximum available pressure level in the pilot system. Pilot pressure valve TMB0 The cartridge type pilot pressure relief valve TMB0, normally set at min bar, is used in outlet section UB and UC to secure available pilot pressure build-up for remote control. Depending on system design this necessary starting pressure could also be achieved through downstream arrangements, for example a support leg valve. TMB0 is adjustable and sealable. 7

18 Typical hydraulic circuit diagrams For dual flow range. With left inlet for single pump circuit. Electro-hydraulic proportional operated. For single flow range. With left inlet for single pump circuit. Manually operated. 8

19 For single flow range. With mid-outlet for dual pump circuits. Manually operated. For single flow range. For systems with variable displacement pump. Electro-hydraulic proportional operated. 9

20 Note The information in this brochure relates to the operating conditions and applications described. For applications or operating conditions not described, please contact the relevant technical department. Subject to technical modifications. 0 Head Office HYDAC INTERNATIONAL GMBH Industriegebiet 6680 Sulzbach/Saar Germany Tel.: Fax: mobilevalves@hydac.com Internet: