VSK. Functional Description HA /2008. Constant Flow - Control Valves VSK4 VSK2 VSK2 VSK4. Replaces HA /2000

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1 Constant Flow - Control Valves VSK HA 5 5/008 Size 06 p max up to 0 bar Q max up to 0 L/min Replaces HA 5 /000 Wide range of throttling oriffices VSK4 Two models: - cartridge - screw-in cartridge valve VSK Functional Description The pressure compensated flow control valves VSK are designed to control flow rates practically independent of pressures and temperatures. The set up flow rate is constant and depends on the orifice area. The -way flow control valves can be used in meter-in, meter out or bleed-off applications. The valve consists of housing (), throttling orifice (), pressure compensator (), spring (4) and adjustment screw (5). Throttling in the direction A B takes place on the throttling area of the orifice (). To provide for the independence between flow rate and pressure, a pressure compensator () with the metering edge (6) is located behind the throttling orifice. The spring (4) pushes the compensator to its extreme right position. Provided that there is flow passing through the valve, the input pressure acts on the face area of the pressure compensator and shifts it to the left, thus reducing the flow area of the metering edge (6) which results in decreasing the pressure difference at the throttling orifice. The movement of the compensator stops as soon as the equilibrium is reached and the pressure difference returns to its required value. The pressure compensator continuously compares the pressure difference at the orifice area () with the value preset by the spring pretension and ensures the necessary control, thus holding the flow rate constant. The flow rate of the VSK can be adjusted in a small range by setting the adjustment screw (5). VSK4 The flow rate in direction B A is also given by the orifice area (), but the function of the pressure compensator is excluded. The function of the VSK4 is similar, but in this case, the pressure compensator () is located in front of the throttling orifice (). The housing of the VSK valve does not have any surface treatment, the housing of the VSK4 is phosphate coated. All the other parts are zinc coated. B VSK A B A

2 HA 5 Ordering Code VSK - - / Constant Flow-Control Valve Model Cartridge Screw - in cartridge 4 no designation Type Standard Connectiong thread Metric thread (M8x.5 for VSK) Metric thread (Mx.5 for VSK4) Pipe thread (G /8 only for VSK) M M4 G4 Orifice diameter in mm/00 VSK VSK Technical Data Nominal size mm 06 Maximum flow L/min See table of flow rates Maximum working pressure bar 0 Minimum pressure difference bar See the performance curves Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 5 54 Fluid temperature range for (NBR) C Viscosity range mm /s Maximum degree of fluid contamination Class /8/5 to ISO 4406 (999). Weight - VSK VSK4 with connector Mounting position kg 0,05 00, optional Approximate flow rates corresponding with the orifice diameter VSK ID of the orifice [mm/00] Flow range L/min adjustable through spring pretension at bar ID of the orifice [mm/00] VSK4 Flow range L/min an input presure bar ( ) (.) (.4 -.7) (.4) (.8 -.4) (.0) ( ) 0.0 (.8) ( ) 40.4 (4.) (5.6-7.) 50.0 (4.9) ( ) (6.) (0.7 -.) (6.6) (.0-6.4) 00.0 (8.7) 50. (.5) 5/S.59 (6.0)

3 HA 5 p-q Characteristics (B A) Measured at = mm /s VSK Orifice diameter (mm/00) VSK4 Orifice diameter (mm/00) Flow Q [L/min] p-q Characteristics (A B) Measured at = mm /s Flow Q [L/min] Pressure drop p [bar] Pressure drop p [bar] Flow Q [L/min] VSK Pressure drop p [bar] VSK4 Orifice diameter (mm/00) Flow Q [L/min] Pressure drop p [bar]

4 HA 5 Valve Dimensions Dimensions in millimeters VSK-M4-x Cavity Controlled flow B A Type designation (stamped) Screw for fine flow adjustment (with VSK only) - inside HEX5 - anti clockwise rotation = flow decrease - clockwise rotation = flow increase Slot for screwing-in in mounting cavity of VSK 4 Straight connector GE0-PRL-ED for pipe with D 0 mm 5 Wrench flats size mm, tightening torque Md = 0 Nm 6 Sealing edge Controlled flow A B VSK4-M4-x Cavity Controlled flow Caution! The packing foil is recyclable. The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should not be construed in any case as a guaranteed representation of the product properties in the sense of the law. 4 ARGO-HYTOS s.r.o. CZ Vrchlabí Tel.: , Fax: sales.cz@argo-hytos.com Subject to alteration without notice!

5 Screw - in Cartridge Throttle Valves VSV HA 5 4/0 Mx p max up to 0 bar (464 PSI) Q max up to 0 l/min( 5.8 GPM) Screw-in cartridge design Use : - Metering in one direction - Metering in both directions A B Flow rate set by adjustment screw internal to hexagon lock-nut Functional Description VSV- A VSV-J Lock-nut outside HEX 9 Screw inside HEX 6 VSV-J A Seals 6,7x9,4x,4 NBR90 6,9x,8 NBR70 B B B A Throttle valve VSV is used to control the flow in a hydraulic system in one or both directions. ) A higher sensitivity control is achieved by using the Mx screw thread ) After loosening the lock nut the valve may be screwed out only up to the red marked safety notch; otherwise the valve could get completely unscrewed leading to working fluid escape. Ordering Code VSV - / Screw-in Cartridge Throttle Valve J J Model without check valve with check valve, non regulated flow BA with check valve, non regulated flow AB Mx Thread Mx Functional Symbols VSV- without check valve VSV-J with check valve, non regulated flow BA VSV-J with check valve, non regulated flow AB A B A B A B Technical Data Nominal size mm Mx Max. operating pressure bar (PSI) 0 (464) Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 5 54 Fluid temperature range C ( F) (-... +) Viscosity range mm /s Maximum degree of fluid contamination Class /8/5 to ISO 4406 (006) Weight kg (Ibs) 0,(0.4) Mounting position optional

6 ,, HA 5 p Characteristics Measured at = mm /s VSV-J - Flow direction B A VSV-J - Flow direction A B - Throttle valve closed - Throttle valve open Pressure drop p[bar (PSI)] Flow Q [L/min (GPM)] p-q Characteristics Measured at = mm /s Pressure p [bar (PSI)] turn turns turns 4 turns Cavity Dimensions in millimeters (inches) Flow Q [L/min (GPM)] 4+(.69/.7) 0. A +0.(0.0) -0.(-0.0) +0,4(.99/0.06) 0,005 A 0+0,4(.8/.97) 5+(0.590/0.60),5+(0.49/0.5) 0, A, A 6H7(0.6) 0,6 0 0H8(0.94) Mx-6H 4+0,5(0.945/0.965) ( 5(0.97)) min 8(.0) max (.99) 9+0,4(.55/.55) 0,(0.0/0.047) Caution! The packing foil is recyclable. The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should not be construed in any way as a guaranteed representation of the product properties in any legal sense. ARGO-HYTOS s.r.o. CZ Vrchlabí Tel.: , Fax: sales.cz@argo-hytos.com Subject to change without notice!

7 Way Flow Control Valves with Free Flow Check Valves M7 x p max 50 bar Q 60 L/min SFCA-K/l HA 56 7/008 Replaces HA 56 9/006 Volumetric flow control independent to the load Volumetric flow control independent to the viscosity Large flow range Functional Description The valve consists of an adjustable measuring orifice plate after which it is installed a stabilizer of pressure drop and of an by-pass unidirectional valve formed by a bushing of the stabilizer gate valve fitted with a seat on the front surface. During the flow from () to () the liquid flows through the centre of the stabilizer gate valve and applies pressure at the same time to the gate valve of the unidirectional valve to press it in the seat and then continues to flow through the throttling cross section to the side channel (). The stabilizer has been designed to serve for maintaining a pressure difference arisen in front of the measuring orifice plate and after the measuring orifice plate at a constant level of approximately of. MPa given by the spring force so as to ensure a constant rate of flow through the channel (). The pressure in front of the throttling orifice plate acts to the side part of the stabilizer gate valve and the pressure in the channel () acts to back side of the stabilizer gate valve. Due to permanent equalizing the forces the position of the stabilizer gate valve changes with each change of pressure before and after the measuring orifice plate and in this way it results in appropriate decreasing or eventually appropriate increasing the flow cross section in the channel (). In the direction from () to () the liquid flows through the unidirectional valve with a small pressure drop. As for appropriate basic surface finish the external parts are zinc coated.

8 HA 56 Ordering Code SFCA-K/l way flow control valve with free flow check valve Adjustable flow range 4-40 L/min L/min 6 no designation Seals NBR Technical Data Cavity M7 x Adjustment range L/min 4-60 Max. pressure bar 50 Hydraulic fluid Hydraulic oil (HM, HV) according to DIN 554 Fluid temperature range C Viscosity mm s Maximum degree of fluid contamination According to ISO 4406 (999), Class /8/5 Weight kg 0.9 Maximum valve tightening torque in valve body or in control block Mounting position Nm 75 + any p-q Characteristics Measured at = 40 mm /s Pressure p[ PSI] Flow Q [ L/min ] Flow Q [ US GPM ] Pressure p[ bar]

9 Dimensions Measurements in millimeters HA 56 HEX 6HR HR7 HEX 7.0 HEX 6HR.0 M7 x x.0-6g - Cavity Measurements in millimeters MIN REAM

10 HA 56 Valve Bodies Measurements in millimeters ISO A x x HOLES OTVOR.0,0 THRO Body without valve Material Ports Port size Type code Aluminium, G/ SB-K-005AL, SAE 0, 7/8-4 SB-K-006AL Steel, G/ SB-K-005ST, SAE 0, 7/8-4 SB-K-006ST The use of aluminium bodies is limited to a maximum operating pressure of 0 bar. Spare Parts Seal kits on request. Caution! The packing foil is recyclable. The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should not be construed in any case as a guaranteed representation of the product properties in the sense of the law. 4 ARGO-HYTOS s.r.o. CZ Vrchlabí Tel.: , Fax: sales.cz@argo-hytos.com Subject to alteration without notice!

11 Way Flow Control Valves M7 x p max 50 bar Q 60 L/min SFA-K/l HA 57 7/008 Replaces HA 57 9/006 Priority style Constant flow largely independent to load and viscosity Port can be pressurized Various flow ranges available Functional Description The valve consists of an adjustable measuring orifice plate after which it is installed a stabilizer of pressure drop. During the flow from () to () the liquid flows through the centre of the stabilizer slide valve and then through radial orifices to the side channel (). The stabilizer has been designed to serve for maintaining a pressure difference arisen on the measuring orifice plate at a constant level of approximately of bar given by the spring force so as to ensure a constant rate of flow through the channel (). The excessive flow of the liquid cause a dynamic pressure in channel () by means of which the slide valve of the stabilizer is shifted against the spring and opens the flow cross section to the channel () through which the excessive liquid flows out either to the drain or to another consumer. The channel () can be loaded by pressure. Due to permanent equalizing the forces the position of the stabilizer gate valve changes with each change of pressure before and after the measuring orifice plate and in this way it results in appropriate decreasing or eventually appropriate increasing the flow cross section of channels. The liquid can flow through the valve also in opposite direction from () to (), however, in a limited extent taking into consideration the fact that the liquid shall flow through the throttling cross section. As for appropriate basic surface finish the external parts are zinc coated.

12 HA 57 Ordering Code SFA-K/l Way Flow Control Valve Adjustable flow range 4-40 L/min L/min 6 no designation Seals NBR Technical Data Cavity M7 x Adjustment range L/min 4-60 Max. pressure bar 50 Hydraulic fluid Hydraulic oil (HM, HV) according to DIN 554 Fluid temperature range C Viscosity mm /s Maximum degree of fluid contamination According to ISO 4406 (999), Class /8/5 Weight kg 0.6 Maximum valve tightening torque in valve body or in control block Nm 75 + Mounting position any p-q Characteristics Measured at = 40 mm /s Bypass higher than regulated pressure Pressure p [PSI] Regulated higher than bypass pressure Regulated Flow Q [L/min] Pressure p [bar] Regulated Flow Q - [ US GPM]

13 Dimensions Measurements in millimeters HA 57 HEX 6HR44.0 HEX 6HR7 7.0 HEX 6HR.0 M7 M7xx -6g.0-6g Cavity Measurements in millimeters B 9.00 MIN 0.08 B 0.08 A -A M7x.0-6H MIN.00 MAX R B MAX 0.05 A

14 HA 57 Valve Bodies Measurements in millimeters ISO A x HOLES x OTVOR.0THRO,0 Body without valve Material Ports Port size Type code Aluminium,, G/ SB-K-005AL,, SAE 0, 7/8-4 SB-K-006AL Steel,, G/ SB-K-005ST,, SAE 0, 7/8-4 SB-K-006ST The use of aluminium bodies is limited to a maximum operating pressure of 0 bar. Spare Parts Seal kits on request. Caution! The packing foil is recyclable. The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should not be construed in any case as a guaranteed representation of the product properties in the sense of the law. 4 ARGO-HYTOS s.r.o. CZ Vrchlabí Tel.: , Fax: sales.cz@argo-hytos.com Subject to alteration without notice!

15 Way Cartridge Flow Control Valves SFA-A/H HA 5060 /007 /4-6 UNF bar (5076 PSI)... 6 L/min (4. GPM) Cartridge design Flow rate setting with adjustment screw For use in meter-in, meter-out and bleed-off applications Functional Description Pressure compensated flow control valves are employed in hydraulic systems where only small speed or revolution variation due to load changing are required. The valve consists basically of throttling orifice (), pressure compensator (), bushing (), adjustment screw (4) and spring (5). Throttling in direction takes place on the throttling orifice. The flow rate depends on the orifice diameter and on the pressure difference at the orifice. The pressure difference can be adjusted in a certain range through preloading the spring (5), which results in the respective flow change. The allocation of the orifice diameters and the corresponding flow rates is apparent from the respective characteristics. The flow rate adjustment can be accomplished by adjustment screw (4). The clockwise rotation increases the flow rate, the anticlockwise rotation decreases the flow rate. The flow rate stabilization is provided for by pressure compensator (), which is situated behind the throttling orifice and mounted into bushing (). The pressure compensator continuously compares the pressure difference at the throttling orifice () with the value given by the spring parameters and the spring preloading and accomplishes the necessary control actions, thus holding the flow rate constant. The valve cannot be closed. As mentioned above, only small flow rate adjustments can be realized. In flow direction, the valve works as an ordinary throttle valve. The pressure losses depend on the orifice diameter see the respective characteristics. The valve housing (7), the nut (6) and the adjustment screw (4) are zinc coated.

16 HA 5060 Ordering Code SFA-A/H no designation V Seals Standard (NBR) Viton (FPM) Way - Cartridge Flow Control Valve 6 Nominal flow rates L/min 6 L/min L/min Technical Data Valve size mm (US) /4-6 UNF-B Nominal flow rates L/min (GPM) (0.5) 6 (.59) (.7) Flow range see Q-p characteristic Maximum working pressure bar (PSI) 50 (5076) Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 554 Fluid temperature range (NBR) C ( F) (-... +) Fluid temperature range (Viton) C ( F) ( ) Viscosity range mm /s (SUS) ( ) Maximum degree of fluid contamination Class /8/5 to ISO 4406 (999) Weight kg (lbs) 0,86 (0.40) Mounting position any p-q Characteristics Measured at = mm /s (56 SUS) Flow directional (Throttling without compensator) Pressure drop p [bar (PSI)] (5076) (66) (76) (75) (0,5) (,06) (,59) (,) (,64) (,) (,96) (6,60) (9,4) (,88) Flow Q [L/min (GPM)]

17 p-q Characteristics Measured at = mm /s (56 SUS) Flow directional (Controlled flow) HA 5060 Nominal flow rate L/min (0.5GPM) Flow Q [L/min (GPM )] (0.9) (0.79) (0.66) (0.5) (0.40) (0.6). (0.),5,0,5,0,5,0 0,5 max. adjustable of flow min. adjustable of flow (75) (76) (66) (5076) Pressure difference p [bar (PSI)] Nominal flow rate 6 L/min (.59 GPM) Flow Q [L/min (GPM )] (.8) (.) (.85) (.58) (.) (.06) (0.79) (0.5) (0.6) 9,0 8,0 7,0 6,0 5,0 4,0,0,0,0 max. adjustable of flow min. adjustable of flow Nominal flow rate L/min (.7 GPM) (75) (76) (66) (5076) Pressure difference p [bar (PSI)] (6.60) 5,0 max. adjustable of flow Flow Q [L/min (GPM )] (5.8) (.96) (.64) (.) 0,0 5,0 0,0 5,0 min. adjustable of flow (75) (76) (66) (5076) Pressure difference p [bar (PSI)]

18 HA 5060 Valve Dimensions Dimensions in inches and millimeters (in brackets) 5 4 5(0.98) (0.87) HEX 5 HEX 6 HEX 4,5 (.0) Cavity /4-6 UNF-A, (0.50/0.49) 7,5(.08) max. 85(.5) Dimensions in millimeters (inches) 8(0.) 5(0.0) Type designation (stamped) Screw for fine flow adjustment - inside hexagon 5 mm (0.0 inch) - anticlockwise rotation = flow decrease - clockwise rotation = flow increase Wrench flats size mm (0.87 inch), tightening torque 0 Nm (. lbs ) 4 Sealing: O-ring 7 x,8 supplied with valve 5 Sealing: Dualseal 0, x,7 x,supplied with valve Spare Parts Dimensions in millimeters Seal kit Dimensions, quantity Type O-ring Dualseal - PU Order number Standard - NBR 7 x,8 (pc.) 0, x,7 x, ( pc.) Viton 7,7 x,78 (pc.) 0, x,7 x,( pc.) Caution! The plastic packaging is recyclable. Certified documentation is available per request. 4 ARGO-HYTOS s.r.o. CZ Vrchlabí Tel.: , Fax: sales.cz@argo-hytos.com Subject to alteration without notice!

19 Flow Divider/Combiner SFDF-B/l HA 54 /00 7/8-4 UNF-A p max 50 bar Q 40 L/min Replaces HA 54 7/008 Divert flows largely independent to the load Combine flows largely independent to the load May be used for synchronisation controls May be used as differential lock Functional Description The valve consists of a valve body, two regulating slide valves mutually connected with a defined stroke and with a fixed measuring orifice plate and three centring springs. The liquid flows from the channel () through the measuring orifice plates to the channels () and (). At the same time the regulating slide valves are pressed by the pressure difference one from the other against the outer centring springs. If the load of the channels () and () is the same the regulating slide valves are held symmetrically to both the channels. At a different load the slide valve on the side of the lower load shifted by an increased pressure drop so far against the spring located behind the slide valve as a new force balance is created caused by changed cross sections of both the regulating slide valves. By this regulating course it is ensured the ratio of division is maintained also at a different load and it is compensated in essence also at a variation of load pressures. If the liquid cannot flow through one of the channels () and () the increased dynamic pressure in this channel causes the displacement of both the slide valves to the opposite side and it results in the fact that the other channel is closed. Then, a negligible rate of flow of the liquid only can flow through the released orifice of the nozzle enabling for example the balance of end positions of two consumers. In the opposite direction of flow both the regulating slide valves are pressed one to the other. Also in this case different load pressures or eventually their changes by changing the position of the regulating slide valves cause a change of throttling cross sections, therefore, the combining the flows occurs also in the same ratio of division. As for appropriate basic surface finish the external parts are zinc coated.

20 HA 54 Ordering Code SFDF-B/l Flow Divider / Combiner no designation Seals NBR Capacity (input) - 5 l/min 5, -0 l/min l/min l/min 40 Cavity Technical Data 7/8-4 UNF-A Maximum flow L/min 40 Max. pressure bar 50 Division ratio % Maximum variation of flow % 0 Pressure drops see p - Q characteristics Hydraulic fluid Hydraulic oil (HM, HV) according to DIN 554 Fluid temperature range C Viscosity mm /s Maximum degree of fluid contamination According to ISO 4406 (999), Class /8/5 Weight kg 0.0 Maximum valve tightening torque in valve body or in control block Nm 4 + Mounting position any p-q Characteristics Measured at = 40 mm /s Pressure p [ bar ] Flow Q [ US GPM] Pressure p [ PSI ] Flow Q [ L/min] 0

21 Dimensions Measurements in millimeters HA HR5,4 HEX 5.4( ) 7/8-4 UNF-A Cavity Measurements in millimeters

22 HA 54 Valve Bodies Measurements in millimeters ISO A Body without valve Material Ports Port size Type code Aluminium,, G/8 SB-B4-00AL,, SAE 8, /4-6 SB-B4-004AL Steel,, G/8 SB-B4-00ST,, SAE 8, /4-6 SB-B4-004ST The use of aluminium bodies is limited to a maximum operating pressure of 0 bar. Spare Parts Seal kits on request. Caution! The packing foil is recyclable. The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should not be construed in any case as a guaranteed representation of the product properties in the sense of the law. 4 ARGO-HYTOS s.r.o. CZ Vrchlabí Tel.: , Fax: sales.cz@argo-hytos.com Subject to alteration without notice!

23 Flow Divider/Combiner SFDF-D/l HA 55 7/008-5/6- UN-A p max 50 bar Q 50 L/min Replaces HA 55 9/006 4 Divert flows largely independent to the load Combine flows largely independent to the load May be used for synchronisation controls May be used as differential lock Functional Description The valve consists of a valve body, two regulating slide valves mutually connected with a defined stroke and with a fixed measuring orifice plate and three centring springs. The liquid flows from the channel () through the measuring orifice plates to the channels () and (4). At the same time the regulating slide valves are pressed by the pressure difference one from the other against the outer centring springs. If the load of the channels () and (4) is the same the regulating slide valves are held symmetrically to both the channels. At a different load the slide valve on the side of the lower load shifted by an increased pressure drop so far against the spring located behind the slide valve as a new force balance is created caused by changed cross sections of both the regulating slide valves. By this regulating course it is ensured the ratio of division is maintained also at a different load and it is compensated in essence also at a variation of load pressures. If the liquid cannot flow through one of the channels () and (4) the increased dynamic pressure in this channel causes the displacement of both the slide valves to the opposite side and it results in the fact that the other channel is closed. Then, a negligible rate of flow of the liquid only can flow through the released orifice of the nozzle enabling for example the balance of end positions of two consumers. In the opposite direction of flow both the regulating slide valves are pressed one to the other. Also in this case different load pressures or eventually their changes by changing the position of the regulating slide valves cause a change of throttling cross sections, therefore, the combining the flows occurs also in the same ratio of division. As for appropriate basic surface finish the external parts are zinc coated. 4

24 HA 55 Ordering Code SFDF-D/l Flow Divider / Combiner no designation Seals NBR Capacity (input) - 00 L/min L/min 50 Technical Data Cavity -5/6- UN-A Maximum flow L/min 50 Max. pressure bar 50 Division ratio % Maximum variation of flow % 0 Pressure drops see p - Q characteristics Hydraulic fluid Hydraulic oil (HM, HV) according to DIN 554 Fluid temperature range C Viscosity mm s Maximum degree of fluid contamination According to ISO 4406 (999), Class /8/5 Weight kg 0.6 Maximum valve tightening torque in valve body or in control block Mounting position Nm 70 + any p-q Characteristics Measured at = 40 mm /s 70 Flow Q [ US GPM] Pressure p [ bar ] Pressure p [ PSI ] Flow Q [ L/min] 0

25 Dimensions Measurements in millimeters HA HR HEX 8.0 / -5/6- UN-A UN-A Cavity Measurements in millimeters STRUŽIT MIN. DO HL MIN. REAMED

26 HA 55 Valve Bodies Measurements in millimeters ISO A Body without valve Material Ports Port size Type code Aluminium,, 4 G/ SB-D-005AL,, 4 SAE 0, 7/8-4 SB-D-006AL Steel,, 4 G/ SB-D-005ST,, 4 SAE 0, 7/8-4 SB-D-006ST The use of aluminium bodies is limited to a maximum operating pressure of 0 bar. Spare Parts Seal kits on request. Caution! The packing foil is recyclable. The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should not be construed in any case as a guaranteed representation of the product properties in the sense of the law. 4 ARGO-HYTOS s.r.o. CZ Vrchlabí Tel.: , Fax: sales.cz@argo-hytos.com Subject to alteration without notice!