Vickers Servo Valves SM4-40 Servovalves - Eatonpub/@eaton/@hyd/... · Servo Valves SM4-40...

Flows to 151 l/min (40 USgpm) — Pressures to 350 bar (5000 psi)

654Released 1/94

Vickers®

Servo Valves

SM4-40 Servovalves

Vickers, Incorporated 1994All Rights Reserved

Introduction

Vickers SM4-40 servovalves canprovide system closed loop control withexact positional accuracy, repeatablevelocity profiles, and predictable force ortorque regulation.

Typical applications include plasticinjection molding and blow moldingsystems, test and simulationequipment, die casting machines,hydraulic press brakes, animation andentertainment equipment, oil explorationvehicles, and lumber machinery.

Applications of the 350 bar (5000 psi)SM4-40 (-50 design) include automaticgage control (AGC), roll bend/rollbalance systems, plastic injectionmolding systems, test and simulationequipment, and hydraulic press brakes.

This model of the high performanceSM4 series offers a wide range of rated

flows from 76 to 151 l/min (20 to 40USgpm) at �p of 70 bar (1000 psi).

The SM4 is a two-stage, modulardesign, flow control valve which can bemanifold or subplate mounted. Thesymmetrical, dual coil, quad air gaptorque motor is integrally mounted to thefirst stage nozzle flapper pilot valve withsix screws. The second stage utilizes afour-way sliding spool and sleevearrangement with a mechanical nulladjust. Spool position is fed back to thefirst stage by means of a cantileverspring. An integral 35 micron (absolute)filter protects against contamination ofthe first stage.

An SM4 servovalve, used with ahydraulic cylinder, position transducer,and appropriate electronics, can provideinfinite cylinder position control to within0,025 mm (0.001 in) or better (depending

on component selection, length ofstroke, and load characteristics).

When applied with servo hydraulicmotors, tachometers, and appropriateelectronics, the SM4 provides infiniteproportional flow control for real-timevelocity/acceleration profiles that can beclosed loop error corrected to withinone-tenth of a revolution per minute.With appropriate pressure transducersor load cells, cylinders, and properelectronics in force control applications,the SM4 offers exact load pressure/forcecontrol and excellent system stabilitywith pressure and load to ±1% full scale.

The field-proven design of the SM4-40servovalve, combined with Vickersprecision manufacturing techniques,provides you with the optimum insystem control.

Features and Benefits� The wide range of SM4 flow

capabilities allows selection of thevalve size best suited for anapplication.

� The SM4-40 (-10 design) has a highstrength aluminum alloy second stagevalve body for lighter weight withrugged durability.

� The SM4-40 (-50 design) features aspecial stainless steel body and endcaps for operating pressures up to 350bar (5000 psi).

� The symmetrical, dual-coil, quad airgap, dry torque motor in Vickersservovalves, with its extremely fastresponse to input signals, can producehighly accurate control profiles.

� Higher frequency response —available on request — providesenhanced system bandwidth forcritical performance requirements.

� An integral 35 micron (absolute) filterprovides extra first stagecontamination protection.

� The spool and sleeve are hardenedstainless steel to minimize wear anderosion. The O-ring mounted sleeveeliminates spool binding and ensuressmooth operation.

� Customized spool lap and sleeveporting are available to provide thespecific flow control required forspecial applications.

� The SM4’s symmetrical designprovides inherently dependablemetering of control flow with minimumnull shifts. The result is moreconsistent machine operation.

� Viton* seals are standard.

� The flexibility of standardized portcircles, mounting patterns, andadapter manifolds makes Vickersservovalves a cost-effective choice forreplacing existing servovalves andenhancing existing systems.

� The SM4-40 features a simpleinterface to an available dual filtermodule that provides extra protectionagainst pilot contamination.

� Flushing valves are available that cangreatly reduce initial systemcontamination levels prior to SM4installation.

* Viton is a registered trademark of theDuPont Co.

1

Contents

Operating Data 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Curves 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model Code 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation Dimensions 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SM4M(E) Mounting Subplates 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SM4A Adapter Manifolds 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SM4FV Flushing Valves 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SM4FM Filter Modules 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SM4CB Cross Port Bleed 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Weights 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Additional Accessories 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application Data 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cross Section of TypicalSM4-40 Servovalve

3

Operating Data

Flow and LeakageAll data is typical, based on actual testsat 70 bar (1000 psi) ∆p, 30 cST (141SUS), and 49°C (120°F).

Model Series

Maximum RatedFlow �10%l/min (USgpm)

Maximum TotalNull Leakagel/min (USgpm)

Maximum Pilot Flow at70 bar (1000 psi) ∆pl/min (USgpm)

SM4-40 (-10 design)151 (40) 3 48 (0 92) 0 9 (0 24)

SM4-40 (-50 design)151 (40) 3,48 (0.92) 0,9 (0.24)

PerformanceMaximum Supply Pressurebar (psi)

SM4-40 (-10 design): 210 (3000)SM4-40 (-50 design): 350 (5000)

Minimum Supply Pressurebar (psi)

14 (200)

Proof Pressure% maximum supply pressure

At Supply Port: 150At Return Port: 100

Burst Pressure, Return Port Open% maximum supply pressure

250

Maximum Operating Temperature°C (°F)

135 (275)

Hysteresis Around Null% of rated current

≤3

Symmetry Error% of rated current

<10

Linearity Error% of rated current

<10

Threshold% of rated current

≤0.5

Ruggedness Test ResultsVibration Test5 Hz to 2000 Hz along each axis

No damage to components

Shock TestUp to 150g along all axes

No damage to components

Endurance TestTo ISO 6404

No degradation in performance

4

Flow GainNormal region for standard modelsshown with typical no-load flow gaintolerances excluding hysteresis.

–100–100

% RATED CURRENT

% R

AT

ED

FLO

W

–80

–60

–40

–20

0

+20

+40

+60

+80

+100

–80 –60 –40 –20 0 +20 +40 +60 +80 +100

�5%

Flow tolerance �10%

–10–100

% INPUT CURRENT

% M

AX

IMU

M S

UP

PLY

PR

ES

SU

RE

–80

–60

–40

–20

0

+20

+40

+60

+80

+100

–8 –6 –4 –2 0 +2 +4 +6 +8 +10

To 100% rated

Pressure GainChange in load pressure drop with inputcurrent shown with no valve flow andclosed control ports.

Pressure gain in the null region is >30%of supply pressure per 1% of ratedcurrent.

200% nominal gain

50% nominal gain

5

00

PO

WE

R T

RA

NS

MIS

SIO

N E

FF

ICIE

NC

Y –

%

10

20

0.2 0.4

Power TransmissionEfficiencyMaximum power envelope expressed asa percentage with T port pressure equalto 0 bar.

Power transferred to the load is optimumwhen valve pressure drop is one third ofsupply pressure. Load pressure dropshould be limited to 2/3 of supplypressure so the flow gain of theservovalve remains high enough tomaintain control of the load. Overallhydraulic efficiency must be consideredwhen sizing system heat exchangers.

RATIO LOAD PRESSURE DROPSUPPLY PRESSURE

30

40

50

60

70

80

90

100

0.6 0.8 1.0

Change in Rated FlowRated flows at valve pressure drops from5 bar (70 psi) to 350 bar (5000 psi) forthe five available spools.

NO

-LO

AD

FLO

W R

AT

E –

l/m

in (

US

gpm

)

15 (4)19 (5)

27 (7)30 (8)

38 (10)

57 (15)

76 (20)95 (25)

114 (30)

SP

OO

L R

AT

ED

FLO

W –

(U

Sgp

m)

l/min

135 (35)151 (40) (20) 76

SM4-40 (-50 design) only

(40) 151(35) 132(30) 113(25) 95190 (50)

211 (55)228 (60)

350(5000)

5(70)

VALVE PRESSURE DROP (P→A)+(B→T) – bar (psi)

7(100)

14(200)

21(300)

35(500)

70(1000)

140(2000)

4 (1)

8 (2)

11 (3)

210(3000)

246 (65)

Electrical Polarity forControl Flow Out of B Port

Single:A+, B–orC+, D–

Series:A+, D–Connect B and C

+ –

Parallel:A+, C+B–, D–Connect A and CConnect B and D

Differential:A–, D–B+, C+Connect B and CBC–, current BA>CDBC+, current CD>BA – –+

A B C D

+ –

–+ –+

A B C D

A B C D

A B C D

Servovalve

Servovalve

Servovalve

Servovalve

6

Coil ResistanceSelect coil resistance and connectionsfor compatible interface to servoelectronics. Recommended coilresistance is shown in bold print.

Nominal ResistanceRated Current mA

Nominal ResistancePer Coil at 21°C (70°F)Ohms

Single, Parallel, orDifferential Connection Series Connection

20 200 100

Standard coil 30 100 50tandard coilresistance selection 80 40 20

200 20 10

80 50 25

140 40 20

Optional coil 200 15 7.5O tional coilresistance selection 300 30 15

1000 10 5

1500 8 4

Calculating Frequency Responseat System PressurePS = System pressurePM = Maximum supply pressure of

valve: 210 bar (3000 psi) forSM4-40 and 350 bar(5000 psi) for SM4-40 (-50 design)

fPM= Frequency (at 90° phase angle) atmaximum supply pressure (PM)

fPS = Frequency (at 90° phase angle) atsystem pressure (PS)

1. Calculate the ratio of systempressure to maximum supplypressure:

2. Use the result of step 1 and thecurve below to estimate

3. Use the applicable frequencyresponse curve from the followingpages to estimate fPM (the maximumsupply pressure frequency responseat 90° phase angle) for the desiredvalve.

4. Multiply the values obtained in steps2 and 3. The result is fPS (systempressure frequency response at 90°phase angle).

Frequency ResponseFrequency response is defined as therelationship of no-load control flow toinput current with a sinusoidal currentsweep at constant amplitude over arange of frequencies. It is expressed infrequency (Hz), amplitude ratio (dB),and phase angle (degrees).

As shown in the sample curve (belowleft), standard comparison points forservovalve frequency response arethose frequencies at which –3 dBamplitude ratio and 90° phase angleoccur.

Vickers SM4 torque motors aremagnetically stabilized for reliableservovalve performance at operatingpressures from 14 to 350 bar (200 to5000 psi).

Example: A standard performanceSM4-40 (-10 design) valve with a flow of95 l/min (25 USgpm) is to be used at165 bar (2400 psi).

1. Calculate the ratio of systempressure to maximum supplypressure:

2. Use the result of step 1 and thecurve below right to estimate

3. Use the frequency response curvefrom page 7 to estimate fPM.

4. Multiply the values obtained in steps2 and 3. The result is fPS (systempressure frequency response at 90°phase angle).

0 0.2

1.0

0.8

0.6

0.40.4 0.6 1.00.8

PS (system pressure)

PM (maximum supply pressure)

fPSfPM

Phase lag(shift)

7 10 20 30 40 50 70 100

0

–5

–10

FREQUENCY – Hz

AM

PLI

TU

DE

RA

TIO

– d

B

PH

AS

E A

NG

LE –

deg

rees

120

90

–15

–20

200 300 400 500

100

80

70

60

50

40

30

20

10

110

–3dB comparison point

0.9

0.7

0.5

0.1 0.3 0.5 0.90.7

PS

PM

fPS

fPM

PS

PM�

2400 psi3000 psi

� 0.8

fPS

fPM� 0.92

fPM � 42 Hz

fPS � 0.92 � 42 Hz � 39 Hz

7

Performance Curves

Rise timesat 63% flow

0 10 200

TIME – ms

OU

TP

UT

FLO

W %

100

20

40

60

80

Settling timesto 5% accuracy

Critically damped valve

Underdamped valve

5 15

120

3 10 20 30 40 50 70 100

0

–5

–10

FREQUENCY – Hz

AM

PLI

TU

DE

RA

TIO

– d

B–15

–20

–25

PH

AS

E L

AG

– d

egre

es

90

100

80

70

60

50

40

30

20

10

�40% rated current

2004 5 7

113 l/min (30 USgpm)132 l/min (35 USgpm)151 l/min (40 USgpm)

76 l/min (20 USgpm)95 l/min (25 USgpm)

3 10 20 30 40 50 70 100

0

–5

–10

FREQUENCY – Hz

AM

PLI

TU

DE

RA

TIO

– d

B

–15

–20

–25

–30

PH

AS

E L

AG

– d

egre

es90

100

80

70

60

50

40

30

20

10



2004 5 7

Typical Frequency Response CurvesSM4-40 (-10 and -50 designs) shownat 210 bar (3000 psi)

Step ResponseStep response is defined as the typicalrise time needed to achieve a givenpercentage of control flow output.Settling time is the time needed fortransient flow fluctuations to diminish towithin a given accuracy range. Both areexpressed in milliseconds (ms).

The example at right shows the stepresponse curves for a critically dampedvalve and an underdamped valve. Risetimes are illustrated for 63% of controlflow output, and settling times areshown at 100±5% of control flow output.

8


OU

TP

UT

FLO

W %

100

20

40

60

80

120

0

76 l/min (20 USgpm)

95 l/min (25 USgpm)

0 10 20

TIME – ms

5 15 25

113 l/min (30 USgpm)

OU

TP

UT

FLO

W %

100

20

40

60

80

120

00 10 20

TIME – ms

5 15 25

OU

TP

UT

FLO

W %

100

20

40

60

80

120

00 10 20

TIME – ms

5 15 25




Typical Step Response Curves forStandard ModelsSM4-40 (-10 and -50 designs) shownat 210 bar (3000 psi)

9

10

Model Code

3 4 5 61 2

1

2

Series designation

SM4 – Servovalve, high performance,four-way

Valve size

40 – 44,5 mm (1.75 in) port circle

Flow rating

At 70 bar (1000 psi) �p P→A→B→T.Other flows available on request.

Code USgpm l/min(20) 76 20.0 76(25) 95 25.0 95(30) 113 30.0 113(35) 132 35.0 132(40) 151 40.0 151

3

4

5

6Coil resistance/rated current

Ohms/mA at 21°C (70°F). Other coilsavailable on request.

Code Ohms mA20/200 20 20030/100 30 10080/40 80 4080/50 80 50140/40 140 40200/15 200 15200/20 200 20300/30 300 301000/10 1000 101500/8 1500 8

Design number

Subject to change. Installationdimensions same for designs 10 through19 and for designs 50 through 59.

10 to 19 – 210 bar (3000 psi) maximum supply pressure

50 to 59 – 350 bar (5000 psi) maximumsupply pressure

Special features suffix

S81 – Intrinsically safe valve (-10design only). Contact yourVickers representative fordetails.

S*** – Vickers assigns a unique suffixto denote a particular group ofspecial features. Contact yourVickers representative fordetails.

Blank– Standard valve

millimeters (inches)

38,18(1.50)

38,18(1.50)

54,8(2.16)

60,00(2.36)

60,00(2.36)

72,70(2.86)

72,70(2.86)

Electrical connector mateswith MS-3106-14S-2S (4 pin).Plus signal to A or C causesflow out of port B.

Null adjust(Do not loosen locknut)

3,00(0.12)∅

8,33(0.33)

4 places

∅

22,00(0.87)4 places

∅ 14,50(0.57)4 places

∅

∅ 44,46(1.75)

∅ 15,82(0.62) optional 5th port

counterbore

port circle

port

36,50(1.44)

19,02(0.75)max.

85,66(3.37) 69,90

(2.75)

2,00(0.08)

40,40(1.59)

60,32(2.37)

30,16(1.19)

20,63(0.81)

20,63(0.81)

22,23(0.875)

46,04(1.81)

92,08(3.63)

25,00(0.98)

NOTESTorque mounting screws to 22 to 27 Nm (190to 240 lb.in.).

Valve mounting surface requires 63 microinchfinish flat within 0,05 (0.002).

Viton port O-rings (AS568-018) provided:1,78 (0.070) cross section and 18,77 (0.739)inner diameter. Replacement O-ringsavailable in seal kit 920321 only.

85,90(3.38)

101,40(3.99)

44,78(1.76)

Locating pin

Valve can be orderedwith connectorpositioned over any port

11

Installation Dimensions

12

SM4M(E) Mounting Subplates

Series designation


Accessory designation

M – Mounting subplate. Maximumsupply pressure of 210 bar (3000psi), except -5* designs withmaximum supply pressure of 350bar (5000 psi).

Port connection locations

Blank – Rear portsE – Side ports

Standard SM4 valve size

40 – SM4-40

3 4 5 61 2

Model Code

1

2 4

6

Design number




Metric suffix

M – Metric version to NG (ISO)standards

Blank – Omit if not required

53

22,00(0.87)

3,00(0.12)

SM4M-40-10/50(M)

7,14(0.28)4 places

∅ thru

10,31(0.41)4 places

∅ counterbore

4,00(0.16)∅

46,04(1.81)

92,08(3.62) 6,30

(0.25)

30,16(1.19)

60,32(2.37)

6,30(0.25)

M8 x 80 thd. (metric).312-18 UNC-2B thd. (inch)4 places

8,71(0.34)4 places

∅ port

127,0(5.00)

63,5(2.50)

∅ 66,00(2.60)port circle

19,05 (0.75) O.D. tubeG3/4 (metric)1.0625-12 UNC-2B thd. (inch)4 places

50,8(2.00)

6,35(0.25)

16,0(0.63)

114,4(4.50)

57,2(2.25)

Installation Dimensionsmillimeters (inches)

20,63(0.81)

20,63(0.81)

∅ 44,46(1.75) port circle

6,35 (0.25) O.D. tubeG1/4 (metric).4375-20 UNF-2B thd. (inch)Optional external pilot pressure port

20,00(0.79)

3,18(0.125)Ext. pilot

∅

13

SM4ME-40-10/50(M)

7,14(0.28)4 places

∅ thru

10,31(0.41)4 places

∅ counterbore

4,00(0.16)∅

20,63(0.81)

20,63(0.81)

20,00(0.79)

6,30(0.25)

22,00(0.87)

6,30(0.25)


M8 x 80 thd. (metric).312-18 UNC-2B thd. (inch)4 places

8,71(0.34)4 places

∅ port

127,0(5.00)

63,5(2.50)

50,8(2.00)

3,00(0.12)

6,35(0.25)

16,0(0.63)

114,4(4.50)

57,2(2.25)

19,05 (0.75) O.D. tubeG3/4 (metric)1.0625-12 UNC-2B thd. (inch)4 places

25,40(1.00)

33,00(1.30)

30,16(1.19)

60,32(2.37)

46,04(1.81)

92,08(3.62)

6,35 (0.25) O.D. tubeG1/4 (metric).4375-20 UNF-2B thd. (inch)Optional external pilot pressure port

14

15

SM4A Adapter Manifolds

Model Code

1

2

Series designation



A – Adapter manifold. Maximum supplypressure of 210 bar (3000 psi),except -5* designs with maximumsupply pressure of 350 bar (5000psi).

4

6

Interface

8 – ISO 4401-08


40 – SM4-40

Design number




Metric suffix

M – Metric version to NG (ISO)standards

Blank – Omit if not required

53

3 4 5 61 2

130,20(5.13)

76,97(3.03)

88,10(3.47)

46,05(1.81)

53,18(2.09)

92,10(3.63)

22,23(0.88)

20,65(0.81)

30,15(1.19)

57,15(2.25)

60,30(2.37) 25,00

(0.98)

92,08(3.63)

46,04(1.81)

20,65(0.81)

4,00(0.16)

Ext. pilot

∅

M8 x 50 thd. (metric).3125-18 UNC-2C thd. (inch)4 places


4,00(0.16)∅

∅ 14,30(0.56) P and T ports

20,00(0.79)6 places

∅ counterbore

∅ 12,00(0.47) A and B ports

13,50(0.53)6 places

∅

114,30(4.50)

57,15(2.25)

50,80(2.00)

13,50(0.53)

13,80(0.54)

152,40(5.92)

15,90(0.63)

3,00(0.19)

6,25(0.25)

6,35(0.25)

112,70(4.44)

94,46(3.72)

76,90(3.03)

29,36(1.16)

96,80(3.81) 73,03

(2.88) 17,60(0.69)

74,60(2.94)

19,05(0.75)

100,80(3.97)

53,16(3.03)

25,23(0.99)2 places

∅ counterbore

23,00(0.91)4 places

∅ port15,50(0.61)∅ 5th port

17,40(0.69)

33,33(1.31)4 places

∅ counterbore


thru

SM4A-8-40-10/50(M)

16

17

SM4FV Flushing Valves

Model Code

1 Series designation



FV– Flushing valve. Maximum flushingpressure of 35 bar (500 psi).


40 – SM4-40

Design number

Subject to change. Installationdimensions same for designs 10 through19.

3 41 2

3

2 4


127,00(5.00)

89,00(3.50)

44,50(1.75)

63,50(2.50)

92,08(3.63)

17,50(0.69)

60,32(2.37)

14,30(0.56)

40,00(1.57)

25,00(0.98)

8,33(0.33)4 places

∅ thru

SM4FV-40-10

18

SM4FM Filter Modules


FM – Filter module. Maximum supplypressure of 210 bar (3000 psi),except -5* designs with maximumsupply pressure of 350 bar (5000psi).


40 – SM4-40

3

Model Code



Design number




3 41 2

42


92,08(3.63)

46,04(1.81)

60,00(2.36)

20,63(0.81)

120,00(4.72)

20,63(0.81)

30,16(1.19)

60,32(2.37)

38,15(1.50)

88,50(3.48)

96,0(3.8)

122,0(4.8)

3,06(0.12)

2,00(0.08)


8,33(0.33)4 places

∅ thru

21,98(0.87)4 places

∅ counterbore

14,5(0.57)4 places

∅ port

SM4FM-40-10/50 19,00(0.75)

19

SM4CB Cross Port Bleed Modules


CB – Cross port bleed module. Includescross port bleed feature betweenports A and B. Maximum supplypressure of 210 bar (3000 psi),except -5* designs with maximumsupply pressure of 350 bar (5000psi).


40 – SM4-40

3

Model Code



Design number




3 41 2

42

20


20,63(0.81)

20,63(0.81)

3,00(0.12)

2,00(0.08)


21,98(0.87)4 places

∅ counterbore14,50(0.57)4 places

∅ port

SM4CB-40-10/50 92,08(3.63)

46,04(1.81)

60,00(2.36)

20,63(0.81)

120,00(4.72)

20,63(0.81)

30,16(1.19)

60,32(2.37)

38,10(1.50)

76,20(3.00)


8,33(0.33)4 places

∅ thru

14,50(0.57)4 places

∅ port

19,00(0.75)

4,00(0.16)∅

NOTEViton port O-rings (AS568-018) provided:1,78 (0.070) cross section and 18,77 (0.739)inner diameter.

21

13Weights

The following table lists approximate dryweights for SM4-40 servovalves andrelated accessories.

Description Model CodeWeightkg (lbs.)

Servov lveSM4-40 (-10 design) 2,8 (6.2)

ServovalveSM4-40 (-50 design) 5,0 (11.0)

Mo nting s bpl teSM4M(E)-40-10(M) 1,8 (4.0)

Mounting subplateSM4M(E)-40-50(M) 5,0 (11.0)

Ad pter m nifoldSM4A-8-40-10(M) 2,013 (4.44)

Adapter manifoldSM4A-8-40-50(M) 5,0 (11.0)

Flushing valve SM4FV-40-10(M) 0,77 (1.70)

Filter mod leSM4FM-40-10(M) 1,38 (3.04)

Filter moduleSM4FM-40-50(M) 1,4 (3.1)

Cross port bleed mod leSM4CB-40-10 0,60 (1.32)

Cross port bleed moduleSM4CB-40-50 1,70 (3.74)

14Additional AccessoriesSM4-40 Accessories Model Code

Valve mounting bolt kit (inch) 5/16–18 x 3” BK866689

Valve mounting bolt kit (metric) M8 x 80mm BK689628M

Subplate mounting bolt kit (inch) 1/4–20 x 21/4” BK866685

Subplate mounting bolt kit (metric) M6 x 60mm BK689623M

Adapter manifold mounting bolt kit (inch) 1/2–13 x 21/4” BK855990

Adapter manifold mounting bolt kit (metric) M12 x 60mm BK855991M

Flushing valve mounting bolt kit (inch) 5/16–18 x 11/2” BK927862

Flushing valve mounting bolt kit (metric) M8 x 40mm BK927863M

Filter module mounting bolt kit (inch) 5/16–18 x 33/4” BK916140

Filter module mounting bolt kit (metric) M8 x 100mm BK916141M

Filter kit (valve) 926470

Filter kit (filter module) 916277

Cable connector (MS3106-14S-2S) 242123

Cable clamp (MS3057-6) 126058

Seal kit 920321

22

Servo ElectronicsSee application brochure 656 for thecomplete Vickers line of amplifiers,power supplies, and function modules.

Application DataFluid CleanlinessProper fluid condition is essential forlong and satisfactory life of hydrauliccomponents and systems. Hydraulicfluid must have the correct balance ofcleanliness, materials, and additives forprotection against wear of components,elevated viscosity and inclusion of air.

Essential information on the correctmethods for treating hydraulic fluid isincluded in Vickers publication 561“Vickers Guide to SystemicContamination Control,” available fromyour local Vickers distributor or bycontacting Vickers, Incorporated.Recommendations on filtration and the

selection of products to control fluidcondition are included in 561.

Recommended cleanliness levels, usingpetroleum oil under common conditions,are based on the highest fluid pressurelevels in the system and are coded inthe chart below. Fluids other thanpetroleum, severe service cycles, ortemperature extremes are cause foradjustment of these cleanliness codes.See Vickers publication 561 for exactdetails.

Vickers products, as any components,will operate with apparent satisfaction influids with higher cleanliness codes thanthose described. Other manufacturers

will often recommend levels abovethose specified. Experience has shown,however, that life of any hydrauliccomponent is shortened in fluids withhigher cleanliness codes than thoselisted below. These codes have beenproven to provide a long, trouble-freeservice life for the products shown,regardless of the manufacturer.

NOTEVickers will extend, by one year, thestandard warranty on all Vickersproducts used in a system protectedby Vickers filters (and elements)applied in a manner consistent withthe principles presented in Vickerspublication 561.

System Pressure Levelpsi

Product <2000 2000–3000 3000+

Vane pumps, fixed 20/18/15 19/17/14 18/16/13

Vane pumps, variable 18/16/14 17/15/13

Piston pumps, fixed 19/17/15 18/16/14 17/15/13

Piston pumps, variable 18/16/14 17/15/13 16/14/12

Directional valves 20/18/15 20/18/15 19/17/14

Proportional valves 17/15/12 17/15/12 15/13/11

Servo valves 16/14/11 16/14/11 15/13/10

Pressure/Flow controls 19/17/14 19/17/14 19/17/14

Cylinders 20/18/15 20/18/15 20/18/15

Vane motors 20/18/15 19/17/14 18/16/13

Axial piston motors 19/17/14 18/16/13 17/15/12

Printed in U.S.A.Rel. 1/94 – HH

Form No. 00-000 Copyright Eaton Corporation, 0000All rights reserved.Printed in U.S.A

Eaton Hydraulics15151 Highway 5Eden Prairie, MN 55344Telephone: 612 937-7254Fax: 612 937-7130www.eatonhydraulics.com

46 New Lane, HavantHampshire PO9 2NBEnglandTelephone: (44) 170-548-6451Fax: (44) 170-548-7110

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